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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Miscellaneous topology parsing fixes:
- Fix topology parsing regression on older CPUs in the new AMD/Hygon
parser
- Fix boot crash on odd Intel Quark and similar CPUs that do not fill
out cpuinfo_x86::x86_clflush_size and zero out
cpuinfo_x86::x86_cache_alignment as a result.
Provide 32 bytes as a general fallback value.
- Fix topology enumeration on certain rare CPUs where the BIOS locks
certain CPUID leaves and the kernel unlocked them late, which broke
with the new topology parsing code. Factor out this unlocking logic
and move it earlier in the parsing sequence"
* tag 'x86-urgent-2024-06-02' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/topology/intel: Unlock CPUID before evaluating anything
x86/cpu: Provide default cache line size if not enumerated
x86/topology/amd: Evaluate SMT in CPUID leaf 0x8000001e only on family 0x17 and greater
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Intel CPUs have a MSR bit to limit CPUID enumeration to leaf two. If
this bit is set by the BIOS then CPUID evaluation including topology
enumeration does not work correctly as the evaluation code does not try
to analyze any leaf greater than two.
This went unnoticed before because the original topology code just
repeated evaluation several times and managed to overwrite the initial
limited information with the correct one later. The new evaluation code
does it once and therefore ends up with the limited and wrong
information.
Cure this by unlocking CPUID right before evaluating anything which
depends on the maximum CPUID leaf being greater than two instead of
rereading stuff after unlock.
Fixes: 22d63660c35e ("x86/cpu: Use common topology code for Intel")
Reported-by: Peter Schneider <pschneider1968@googlemail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Peter Schneider <pschneider1968@googlemail.com>
Cc: <stable@kernel.org>
Link: https://lore.kernel.org/r/fd3f73dc-a86f-4bcf-9c60-43556a21eb42@googlemail.com
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tl;dr: CPUs with CPUID.80000008H but without CPUID.01H:EDX[CLFSH]
will end up reporting cache_line_size()==0 and bad things happen.
Fill in a default on those to avoid the problem.
Long Story:
The kernel dies a horrible death if c->x86_cache_alignment (aka.
cache_line_size() is 0. Normally, this value is populated from
c->x86_clflush_size.
Right now the code is set up to get c->x86_clflush_size from two
places. First, modern CPUs get it from CPUID. Old CPUs that don't
have leaf 0x80000008 (or CPUID at all) just get some sane defaults
from the kernel in get_cpu_address_sizes().
The vast majority of CPUs that have leaf 0x80000008 also get
->x86_clflush_size from CPUID. But there are oddballs.
Intel Quark CPUs[1] and others[2] have leaf 0x80000008 but don't set
CPUID.01H:EDX[CLFSH], so they skip over filling in ->x86_clflush_size:
cpuid(0x00000001, &tfms, &misc, &junk, &cap0);
if (cap0 & (1<<19))
c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
So they: land in get_cpu_address_sizes() and see that CPUID has level
0x80000008 and jump into the side of the if() that does not fill in
c->x86_clflush_size. That assigns a 0 to c->x86_cache_alignment, and
hilarity ensues in code like:
buffer = kzalloc(ALIGN(sizeof(*buffer), cache_line_size()),
GFP_KERNEL);
To fix this, always provide a sane value for ->x86_clflush_size.
Big thanks to Andy Shevchenko for finding and reporting this and also
providing a first pass at a fix. But his fix was only partial and only
worked on the Quark CPUs. It would not, for instance, have worked on
the QEMU config.
1. https://raw.githubusercontent.com/InstLatx64/InstLatx64/master/GenuineIntel/GenuineIntel0000590_Clanton_03_CPUID.txt
2. You can also get this behavior if you use "-cpu 486,+clzero"
in QEMU.
[ dhansen: remove 'vp_bits_from_cpuid' reference in changelog
because bpetkov brutally murdered it recently. ]
Fixes: fbf6449f84bf ("x86/sev-es: Set x86_virt_bits to the correct value straight away, instead of a two-phase approach")
Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Jörn Heusipp <osmanx@heusipp.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20240516173928.3960193-1-andriy.shevchenko@linux.intel.com/
Link: https://lore.kernel.org/lkml/5e31cad3-ad4d-493e-ab07-724cfbfaba44@heusipp.de/
Link: https://lore.kernel.org/all/20240517200534.8EC5F33E%40davehans-spike.ostc.intel.com
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and greater
The new AMD/HYGON topology parser evaluates the SMT information in CPUID leaf
0x8000001e unconditionally while the original code restricted it to CPUs with
family 0x17 and greater.
This breaks family 0x15 CPUs which advertise that leaf and have a non-zero
value in the SMT section. The machine boots, but the scheduler complains loudly
about the mismatch of the core IDs:
WARNING: CPU: 1 PID: 0 at kernel/sched/core.c:6482 sched_cpu_starting+0x183/0x250
WARNING: CPU: 0 PID: 1 at kernel/sched/topology.c:2408 build_sched_domains+0x76b/0x12b0
Add the condition back to cure it.
[ bp: Make it actually build because grandpa is not concerned with
trivial stuff. :-P ]
Fixes: f7fb3b2dd92c ("x86/cpu: Provide an AMD/HYGON specific topology parser")
Closes: https://gitlab.archlinux.org/archlinux/packaging/packages/linux/-/issues/56
Reported-by: Tim Teichmann <teichmanntim@outlook.de>
Reported-by: Christian Heusel <christian@heusel.eu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Tim Teichmann <teichmanntim@outlook.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/7skhx6mwe4hxiul64v6azhlxnokheorksqsdbp7qw6g2jduf6c@7b5pvomauugk
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Ingo Molnar:
"Export a symbol to make life easier for instrumentation/debugging"
* tag 'sched-urgent-2024-06-02' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/x86: Export 'percpu arch_freq_scale'
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Commit:
7bc263840bc3 ("sched/topology: Consolidate and clean up access to a CPU's max compute capacity")
removed rq->cpu_capacity_orig in favor of using arch_scale_freq_capacity()
calls. Export the underlying percpu symbol on x86 so that external trace
point helper modules can be made to work again.
Signed-off-by: Phil Auld <pauld@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240530181548.2039216-1-pauld@redhat.com
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf events fix from Ingo Molnar:
"Add missing MODULE_DESCRIPTION() lines"
* tag 'perf-urgent-2024-06-02' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel: Add missing MODULE_DESCRIPTION() lines
perf/x86/rapl: Add missing MODULE_DESCRIPTION() line
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Fix the 'make W=1 C=1' warnings:
WARNING: modpost: missing MODULE_DESCRIPTION() in arch/x86/events/intel/intel-uncore.o
WARNING: modpost: missing MODULE_DESCRIPTION() in arch/x86/events/intel/intel-cstate.o
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Link: https://lore.kernel.org/r/20240530-md-arch-x86-events-intel-v1-1-8252194ed20a@quicinc.com
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Fix the warning from 'make C=1 W=1':
WARNING: modpost: missing MODULE_DESCRIPTION() in arch/x86/events/rapl.o
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Link: https://lore.kernel.org/r/20240530-md-arch-x86-events-v1-1-e45ffa8af99f@quicinc.com
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Enforce full ordering for ATOMIC operations with BPF_FETCH
- Fix uaccess build errors seen with GCC 13/14
- Fix build errors on ppc32 due to ARCH_HAS_KERNEL_FPU_SUPPORT
- Drop error message from lparcfg guest name lookup
Thanks to Christophe Leroy, Guenter Roeck, Nathan Lynch, Naveen N Rao,
Puranjay Mohan, and Samuel Holland.
* tag 'powerpc-6.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc: Limit ARCH_HAS_KERNEL_FPU_SUPPORT to PPC64
powerpc/uaccess: Use YZ asm constraint for ld
powerpc/uaccess: Fix build errors seen with GCC 13/14
powerpc/pseries/lparcfg: drop error message from guest name lookup
powerpc/bpf: enforce full ordering for ATOMIC operations with BPF_FETCH
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When building a 32-bit kernel, some toolchains do not allow mixing soft
float and hard float object files:
LD vmlinux.o
powerpc64le-unknown-linux-musl-ld: lib/test_fpu_impl.o uses hard float, arch/powerpc/kernel/udbg.o uses soft float
powerpc64le-unknown-linux-musl-ld: failed to merge target specific data of file lib/test_fpu_impl.o
make[2]: *** [scripts/Makefile.vmlinux_o:62: vmlinux.o] Error 1
make[1]: *** [Makefile:1152: vmlinux_o] Error 2
make: *** [Makefile:240: __sub-make] Error 2
This is not an issue when building a 64-bit kernel. To unbreak the
build, limit ARCH_HAS_KERNEL_FPU_SUPPORT to 64-bit kernels. This is okay
because the only real user of this option, amdgpu, was previously
limited to PPC64 anyway; see commit a28e4b672f04 ("drm/amd/display: use
ARCH_HAS_KERNEL_FPU_SUPPORT").
Fixes: 01db473e1aa3 ("powerpc: implement ARCH_HAS_KERNEL_FPU_SUPPORT")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202405250851.Z4daYSWG-lkp@intel.com/
Reported-by: Guenter Roeck <linux@roeck-us.net>
Closes: https://lore.kernel.org/lkml/eeffaec3-df63-4e55-ab7a-064a65c00efa@roeck-us.net/
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240529162852.1209-1-samuel.holland@sifive.com
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The 'ld' instruction requires a 4-byte aligned displacement because it
is a DS-form instruction. But the "m" asm constraint doesn't enforce
that.
Add a special case of __get_user_asm2_goto() so that the "YZ" constraint
can be used for "ld".
The "Z" constraint is documented in the GCC manual PowerPC machine
constraints, and specifies a "memory operand accessed with indexed or
indirect addressing". "Y" is not documented in the manual but specifies
a "memory operand for a DS-form instruction". Using both allows the
compiler to generate a DS-form "ld" or X-form "ldx" as appropriate.
The change has to be conditional on CONFIG_PPC_KERNEL_PREFIXED because
the "Y" constraint does not guarantee 4-byte alignment when prefixed
instructions are enabled.
No build errors have been reported due to this, but the possibility is
there depending on compiler code generation decisions.
Fixes: c20beffeec3c ("powerpc/uaccess: Use flexible addressing with __put_user()/__get_user()")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240529123029.146953-2-mpe@ellerman.id.au
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Building ppc64le_defconfig with GCC 14 fails with assembler errors:
CC fs/readdir.o
/tmp/ccdQn0mD.s: Assembler messages:
/tmp/ccdQn0mD.s:212: Error: operand out of domain (18 is not a multiple of 4)
/tmp/ccdQn0mD.s:226: Error: operand out of domain (18 is not a multiple of 4)
... [6 lines]
/tmp/ccdQn0mD.s:1699: Error: operand out of domain (18 is not a multiple of 4)
A snippet of the asm shows:
# ../fs/readdir.c:210: unsafe_copy_dirent_name(dirent->d_name, name, namlen, efault_end);
ld 9,0(29) # MEM[(u64 *)name_38(D) + _88 * 1], MEM[(u64 *)name_38(D) + _88 * 1]
# 210 "../fs/readdir.c" 1
1: std 9,18(8) # put_user # *__pus_addr_52, MEM[(u64 *)name_38(D) + _88 * 1]
The 'std' instruction requires a 4-byte aligned displacement because
it is a DS-form instruction, and as the assembler says, 18 is not a
multiple of 4.
A similar error is seen with GCC 13 and CONFIG_UBSAN_SIGNED_WRAP=y.
The fix is to change the constraint on the memory operand to put_user(),
from "m" which is a general memory reference to "YZ".
The "Z" constraint is documented in the GCC manual PowerPC machine
constraints, and specifies a "memory operand accessed with indexed or
indirect addressing". "Y" is not documented in the manual but specifies
a "memory operand for a DS-form instruction". Using both allows the
compiler to generate a DS-form "std" or X-form "stdx" as appropriate.
The change has to be conditional on CONFIG_PPC_KERNEL_PREFIXED because
the "Y" constraint does not guarantee 4-byte alignment when prefixed
instructions are enabled.
Unfortunately clang doesn't support the "Y" constraint so that has to be
behind an ifdef.
Although the build error is only seen with GCC 13/14, that appears
to just be luck. The constraint has been incorrect since it was first
added.
Fixes: c20beffeec3c ("powerpc/uaccess: Use flexible addressing with __put_user()/__get_user()")
Cc: stable@vger.kernel.org # v5.10+
Suggested-by: Kewen Lin <linkw@gcc.gnu.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240529123029.146953-1-mpe@ellerman.id.au
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It's not an error or exceptional situation when the hosting
environment does not expose a name for the LP/guest via RTAS or the
device tree. This happens with qemu when run without the '-name'
option. The message also lacks a newline. Remove it.
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Fixes: eddaa9a40275 ("powerpc/pseries: read the lpar name from the firmware")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240524-lparcfg-updates-v2-1-62e2e9d28724@linux.ibm.com
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The Linux Kernel Memory Model [1][2] requires RMW operations that have a
return value to be fully ordered.
BPF atomic operations with BPF_FETCH (including BPF_XCHG and
BPF_CMPXCHG) return a value back so they need to be JITed to fully
ordered operations. POWERPC currently emits relaxed operations for
these.
We can show this by running the following litmus-test:
PPC SB+atomic_add+fetch
{
0:r0=x; (* dst reg assuming offset is 0 *)
0:r1=2; (* src reg *)
0:r2=1;
0:r4=y; (* P0 writes to this, P1 reads this *)
0:r5=z; (* P1 writes to this, P0 reads this *)
0:r6=0;
1:r2=1;
1:r4=y;
1:r5=z;
}
P0 | P1 ;
stw r2, 0(r4) | stw r2,0(r5) ;
| ;
loop:lwarx r3, r6, r0 | ;
mr r8, r3 | ;
add r3, r3, r1 | sync ;
stwcx. r3, r6, r0 | ;
bne loop | ;
mr r1, r8 | ;
| ;
lwa r7, 0(r5) | lwa r7,0(r4) ;
~exists(0:r7=0 /\ 1:r7=0)
Witnesses
Positive: 9 Negative: 3
Condition ~exists (0:r7=0 /\ 1:r7=0)
Observation SB+atomic_add+fetch Sometimes 3 9
This test shows that the older store in P0 is reordered with a newer
load to a different address. Although there is a RMW operation with
fetch between them. Adding a sync before and after RMW fixes the issue:
Witnesses
Positive: 9 Negative: 0
Condition ~exists (0:r7=0 /\ 1:r7=0)
Observation SB+atomic_add+fetch Never 0 9
[1] https://www.kernel.org/doc/Documentation/memory-barriers.txt
[2] https://www.kernel.org/doc/Documentation/atomic_t.txt
Fixes: aea7ef8a82c0 ("powerpc/bpf/32: add support for BPF_ATOMIC bitwise operations")
Fixes: 2d9206b22743 ("powerpc/bpf/32: Add instructions for atomic_[cmp]xchg")
Fixes: dbe6e2456fb0 ("powerpc/bpf/64: add support for atomic fetch operations")
Fixes: 1e82dfaa7819 ("powerpc/bpf/64: Add instructions for atomic_[cmp]xchg")
Cc: stable@vger.kernel.org # v6.0+
Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Naveen N Rao <naveen@kernel.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240513100248.110535-1-puranjay@kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
- A fix to avoid pt_regs aliasing with idle thread stacks on secondary
harts.
- HAVE_ARCH_HUGE_VMAP is enabled on XIP kernels, which fixes boot
issues on XIP systems with huge pages.
- An update to the uABI documentation clarifying that only scalar
misaligned accesses were grandfathered in as supported, as the vector
extension did not exist at the time the uABI was frozen.
- A fix for the recently-added byte/half atomics to avoid losing the
fully ordered decorations.
* tag 'riscv-for-linus-6.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: Fix fully ordered LR/SC xchg[8|16]() implementations
Documentation: RISC-V: uabi: Only scalar misaligned loads are supported
riscv: enable HAVE_ARCH_HUGE_VMAP for XIP kernel
riscv: prevent pt_regs corruption for secondary idle threads
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The fully ordered versions of xchg[8|16]() using LR/SC lack the
necessary memory barriers to guarantee the order.
Fix this by matching what is already implemented in the fully ordered
versions of cmpxchg() using LR/SC.
Suggested-by: Andrea Parri <parri.andrea@gmail.com>
Reported-by: Andrea Parri <parri.andrea@gmail.com>
Closes: https://lore.kernel.org/linux-riscv/ZlYbupL5XgzgA0MX@andrea/T/#u
Fixes: a8ed2b7a2c13 ("riscv/cmpxchg: Implement xchg for variables of size 1 and 2")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Andrea Parri <parri.andrea@gmail.com>
Link: https://lore.kernel.org/r/20240530145546.394248-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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HAVE_ARCH_HUGE_VMAP also works on XIP kernel, so remove its dependency on
!XIP_KERNEL.
This also fixes a boot problem for XIP kernel introduced by the commit in
"Fixes:". This commit used huge page mapping for vmemmap, but huge page
vmap was not enabled for XIP kernel.
Fixes: ff172d4818ad ("riscv: Use hugepage mappings for vmemmap")
Signed-off-by: Nam Cao <namcao@linutronix.de>
Cc: <stable@vger.kernel.org>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20240526110104.470429-1-namcao@linutronix.de
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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Top of the kernel thread stack should be reserved for pt_regs. However
this is not the case for the idle threads of the secondary boot harts.
Their stacks overlap with their pt_regs, so both may get corrupted.
Similar issue has been fixed for the primary hart, see c7cdd96eca28
("riscv: prevent stack corruption by reserving task_pt_regs(p) early").
However that fix was not propagated to the secondary harts. The problem
has been noticed in some CPU hotplug tests with V enabled. The function
smp_callin stored several registers on stack, corrupting top of pt_regs
structure including status field. As a result, kernel attempted to save
or restore inexistent V context.
Fixes: 9a2451f18663 ("RISC-V: Avoid using per cpu array for ordered booting")
Fixes: 2875fe056156 ("RISC-V: Add cpu_ops and modify default booting method")
Signed-off-by: Sergey Matyukevich <sergey.matyukevich@syntacore.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20240523084327.2013211-1-geomatsi@gmail.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Paolo Abeni:
"Including fixes from bpf and netfilter.
Current release - regressions:
- gro: initialize network_offset in network layer
- tcp: reduce accepted window in NEW_SYN_RECV state
Current release - new code bugs:
- eth: mlx5e: do not use ptp structure for tx ts stats when not
initialized
- eth: ice: check for unregistering correct number of devlink params
Previous releases - regressions:
- bpf: Allow delete from sockmap/sockhash only if update is allowed
- sched: taprio: extend minimum interval restriction to entire cycle
too
- netfilter: ipset: add list flush to cancel_gc
- ipv4: fix address dump when IPv4 is disabled on an interface
- sock_map: avoid race between sock_map_close and sk_psock_put
- eth: mlx5: use mlx5_ipsec_rx_status_destroy to correctly delete
status rules
Previous releases - always broken:
- core: fix __dst_negative_advice() race
- bpf:
- fix multi-uprobe PID filtering logic
- fix pkt_type override upon netkit pass verdict
- netfilter: tproxy: bail out if IP has been disabled on the device
- af_unix: annotate data-race around unix_sk(sk)->addr
- eth: mlx5e: fix UDP GSO for encapsulated packets
- eth: idpf: don't enable NAPI and interrupts prior to allocating Rx
buffers
- eth: i40e: fully suspend and resume IO operations in EEH case
- eth: octeontx2-pf: free send queue buffers incase of leaf to inner
- eth: ipvlan: dont Use skb->sk in ipvlan_process_v{4,6}_outbound"
* tag 'net-6.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (69 commits)
netdev: add qstat for csum complete
ipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound
net: ena: Fix redundant device NUMA node override
ice: check for unregistering correct number of devlink params
ice: fix 200G PHY types to link speed mapping
i40e: Fully suspend and resume IO operations in EEH case
i40e: factoring out i40e_suspend/i40e_resume
e1000e: move force SMBUS near the end of enable_ulp function
net: dsa: microchip: fix RGMII error in KSZ DSA driver
ipv4: correctly iterate over the target netns in inet_dump_ifaddr()
net: fix __dst_negative_advice() race
nfc/nci: Add the inconsistency check between the input data length and count
MAINTAINERS: dwmac: starfive: update Maintainer
net/sched: taprio: extend minimum interval restriction to entire cycle too
net/sched: taprio: make q->picos_per_byte available to fill_sched_entry()
netfilter: nft_fib: allow from forward/input without iif selector
netfilter: tproxy: bail out if IP has been disabled on the device
netfilter: nft_payload: skbuff vlan metadata mangle support
net: ti: icssg-prueth: Fix start counter for ft1 filter
sock_map: avoid race between sock_map_close and sk_psock_put
...
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https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:
====================
pull-request: bpf 2024-05-27
We've added 15 non-merge commits during the last 7 day(s) which contain
a total of 18 files changed, 583 insertions(+), 55 deletions(-).
The main changes are:
1) Fix broken BPF multi-uprobe PID filtering logic which filtered by thread
while the promise was to filter by process, from Andrii Nakryiko.
2) Fix the recent influx of syzkaller reports to sockmap which triggered
a locking rule violation by performing a map_delete, from Jakub Sitnicki.
3) Fixes to netkit driver in particular on skb->pkt_type override upon pass
verdict, from Daniel Borkmann.
4) Fix an integer overflow in resolve_btfids which can wrongly trigger build
failures, from Friedrich Vock.
5) Follow-up fixes for ARC JIT reported by static analyzers,
from Shahab Vahedi.
* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
selftests/bpf: Cover verifier checks for mutating sockmap/sockhash
Revert "bpf, sockmap: Prevent lock inversion deadlock in map delete elem"
bpf: Allow delete from sockmap/sockhash only if update is allowed
selftests/bpf: Add netkit test for pkt_type
selftests/bpf: Add netkit tests for mac address
netkit: Fix pkt_type override upon netkit pass verdict
netkit: Fix setting mac address in l2 mode
ARC, bpf: Fix issues reported by the static analyzers
selftests/bpf: extend multi-uprobe tests with USDTs
selftests/bpf: extend multi-uprobe tests with child thread case
libbpf: detect broken PID filtering logic for multi-uprobe
bpf: remove unnecessary rcu_read_{lock,unlock}() in multi-uprobe attach logic
bpf: fix multi-uprobe PID filtering logic
bpf: Fix potential integer overflow in resolve_btfids
MAINTAINERS: Add myself as reviewer of ARM64 BPF JIT
====================
Link: https://lore.kernel.org/r/20240527203551.29712-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Also updated couple of comments along the way.
One of the issues reported was indeed a bug in the code:
memset(ctx, 0, sizeof(ctx)) // original line
memset(ctx, 0, sizeof(*ctx)) // fixed line
That was a nice catch.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202405222314.UG5F2NHn-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202405232036.Xqoc3b0J-lkp@intel.com/
Signed-off-by: Shahab Vahedi <shahab@synopsys.com>
Link: https://lore.kernel.org/r/20240525035628.1026-1-list+bpf@vahedi.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"16 hotfixes, 11 of which are cc:stable.
A few nilfs2 fixes, the remainder are for MM: a couple of selftests
fixes, various singletons fixing various issues in various parts"
* tag 'mm-hotfixes-stable-2024-05-25-09-13' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
mm/ksm: fix possible UAF of stable_node
mm/memory-failure: fix handling of dissolved but not taken off from buddy pages
mm: /proc/pid/smaps_rollup: avoid skipping vma after getting mmap_lock again
nilfs2: fix potential hang in nilfs_detach_log_writer()
nilfs2: fix unexpected freezing of nilfs_segctor_sync()
nilfs2: fix use-after-free of timer for log writer thread
selftests/mm: fix build warnings on ppc64
arm64: patching: fix handling of execmem addresses
selftests/mm: compaction_test: fix bogus test success and reduce probability of OOM-killer invocation
selftests/mm: compaction_test: fix incorrect write of zero to nr_hugepages
selftests/mm: compaction_test: fix bogus test success on Aarch64
mailmap: update email address for Satya Priya
mm/huge_memory: don't unpoison huge_zero_folio
kasan, fortify: properly rename memintrinsics
lib: add version into /proc/allocinfo output
mm/vmalloc: fix vmalloc which may return null if called with __GFP_NOFAIL
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Klara Modin reported warnings for a kernel configured with BPF_JIT but
without MODULES:
[ 44.131296] Trying to vfree() bad address (000000004a17c299)
[ 44.138024] WARNING: CPU: 1 PID: 193 at mm/vmalloc.c:3189 remove_vm_area (mm/vmalloc.c:3189 (discriminator 1))
[ 44.146675] CPU: 1 PID: 193 Comm: kworker/1:2 Tainted: G D W 6.9.0-01786-g2c9e5d4a0082 #25
[ 44.158229] Hardware name: Raspberry Pi 3 Model B (DT)
[ 44.164433] Workqueue: events bpf_prog_free_deferred
[ 44.170492] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 44.178601] pc : remove_vm_area (mm/vmalloc.c:3189 (discriminator 1))
[ 44.183705] lr : remove_vm_area (mm/vmalloc.c:3189 (discriminator 1))
[ 44.188772] sp : ffff800082a13c70
[ 44.193112] x29: ffff800082a13c70 x28: 0000000000000000 x27: 0000000000000000
[ 44.201384] x26: 0000000000000000 x25: ffff00003a44efa0 x24: 00000000d4202000
[ 44.209658] x23: ffff800081223dd0 x22: ffff00003a198a40 x21: ffff8000814dd880
[ 44.217924] x20: 00000000d4202000 x19: ffff8000814dd880 x18: 0000000000000006
[ 44.226206] x17: 0000000000000000 x16: 0000000000000020 x15: 0000000000000002
[ 44.234460] x14: ffff8000811a6370 x13: 0000000020000000 x12: 0000000000000000
[ 44.242710] x11: ffff8000811a6370 x10: 0000000000000144 x9 : ffff8000811fe370
[ 44.250959] x8 : 0000000000017fe8 x7 : 00000000fffff000 x6 : ffff8000811fe370
[ 44.259206] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000
[ 44.267457] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000002203240
[ 44.275703] Call trace:
[ 44.279158] remove_vm_area (mm/vmalloc.c:3189 (discriminator 1))
[ 44.283858] vfree (mm/vmalloc.c:3322)
[ 44.287835] execmem_free (mm/execmem.c:70)
[ 44.292347] bpf_jit_free_exec+0x10/0x1c
[ 44.297283] bpf_prog_pack_free (kernel/bpf/core.c:1006)
[ 44.302457] bpf_jit_binary_pack_free (kernel/bpf/core.c:1195)
[ 44.307951] bpf_jit_free (include/linux/filter.h:1083 arch/arm64/net/bpf_jit_comp.c:2474)
[ 44.312342] bpf_prog_free_deferred (kernel/bpf/core.c:2785)
[ 44.317785] process_one_work (kernel/workqueue.c:3273)
[ 44.322684] worker_thread (kernel/workqueue.c:3342 (discriminator 2) kernel/workqueue.c:3429 (discriminator 2))
[ 44.327292] kthread (kernel/kthread.c:388)
[ 44.331342] ret_from_fork (arch/arm64/kernel/entry.S:861)
The problem is because bpf_arch_text_copy() silently fails to write to the
read-only area as a result of patch_map() faulting and the resulting
-EFAULT being chucked away.
Update patch_map() to use CONFIG_EXECMEM instead of
CONFIG_STRICT_MODULE_RWX to check for vmalloc addresses.
Link: https://lkml.kernel.org/r/20240521213813.703309-1-rppt@kernel.org
Fixes: 2c9e5d4a0082 ("bpf: remove CONFIG_BPF_JIT dependency on CONFIG_MODULES of")
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
Reported-by: Klara Modin <klarasmodin@gmail.com>
Closes: https://lore.kernel.org/all/7983fbbf-0127-457c-9394-8d6e4299c685@gmail.com
Tested-by: Klara Modin <klarasmodin@gmail.com>
Cc: Björn Töpel <bjorn@kernel.org>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Ingo Molnar:
- Fix x86 IRQ vector leak caused by a CPU offlining race
- Fix build failure in the riscv-imsic irqchip driver
caused by an API-change semantic conflict
- Fix use-after-free in irq_find_at_or_after()
* tag 'irq-urgent-2024-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq/irqdesc: Prevent use-after-free in irq_find_at_or_after()
genirq/cpuhotplug, x86/vector: Prevent vector leak during CPU offline
irqchip/riscv-imsic: Fixup riscv_ipi_set_virq_range() conflict
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The absence of IRQD_MOVE_PCNTXT prevents immediate effectiveness of
interrupt affinity reconfiguration via procfs. Instead, the change is
deferred until the next instance of the interrupt being triggered on the
original CPU.
When the interrupt next triggers on the original CPU, the new affinity is
enforced within __irq_move_irq(). A vector is allocated from the new CPU,
but the old vector on the original CPU remains and is not immediately
reclaimed. Instead, apicd->move_in_progress is flagged, and the reclaiming
process is delayed until the next trigger of the interrupt on the new CPU.
Upon the subsequent triggering of the interrupt on the new CPU,
irq_complete_move() adds a task to the old CPU's vector_cleanup list if it
remains online. Subsequently, the timer on the old CPU iterates over its
vector_cleanup list, reclaiming old vectors.
However, a rare scenario arises if the old CPU is outgoing before the
interrupt triggers again on the new CPU.
In that case irq_force_complete_move() is not invoked on the outgoing CPU
to reclaim the old apicd->prev_vector because the interrupt isn't currently
affine to the outgoing CPU, and irq_needs_fixup() returns false. Even
though __vector_schedule_cleanup() is later called on the new CPU, it
doesn't reclaim apicd->prev_vector; instead, it simply resets both
apicd->move_in_progress and apicd->prev_vector to 0.
As a result, the vector remains unreclaimed in vector_matrix, leading to a
CPU vector leak.
To address this issue, move the invocation of irq_force_complete_move()
before the irq_needs_fixup() call to reclaim apicd->prev_vector, if the
interrupt is currently or used to be affine to the outgoing CPU.
Additionally, reclaim the vector in __vector_schedule_cleanup() as well,
following a warning message, although theoretically it should never see
apicd->move_in_progress with apicd->prev_cpu pointing to an offline CPU.
Fixes: f0383c24b485 ("genirq/cpuhotplug: Add support for cleaning up move in progress")
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240522220218.162423-1-dongli.zhang@oracle.com
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
- Fix regressions of the new x86 CPU VFM (vendor/family/model)
enumeration/matching code
- Fix crash kernel detection on buggy firmware with
non-compliant ACPI MADT tables
- Address Kconfig warning
* tag 'x86-urgent-2024-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu: Fix x86_match_cpu() to match just X86_VENDOR_INTEL
crypto: x86/aes-xts - switch to new Intel CPU model defines
x86/topology: Handle bogus ACPI tables correctly
x86/kconfig: Select ARCH_WANT_FRAME_POINTERS again when UNWINDER_FRAME_POINTER=y
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Code in v6.9 arch/x86/kernel/smpboot.c was changed by commit
4db64279bc2b ("x86/cpu: Switch to new Intel CPU model defines") from:
static const struct x86_cpu_id intel_cod_cpu[] = {
X86_MATCH_INTEL_FAM6_MODEL(HASWELL_X, 0), /* COD */
X86_MATCH_INTEL_FAM6_MODEL(BROADWELL_X, 0), /* COD */
X86_MATCH_INTEL_FAM6_MODEL(ANY, 1), /* SNC */ <--- 443
{}
};
static bool match_llc(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
{
const struct x86_cpu_id *id = x86_match_cpu(intel_cod_cpu);
to:
static const struct x86_cpu_id intel_cod_cpu[] = {
X86_MATCH_VFM(INTEL_HASWELL_X, 0), /* COD */
X86_MATCH_VFM(INTEL_BROADWELL_X, 0), /* COD */
X86_MATCH_VFM(INTEL_ANY, 1), /* SNC */
{}
};
static bool match_llc(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
{
const struct x86_cpu_id *id = x86_match_cpu(intel_cod_cpu);
On an Intel CPU with SNC enabled this code previously matched the rule on line
443 to avoid printing messages about insane cache configuration. The new code
did not match any rules.
Expanding the macros for the intel_cod_cpu[] array shows that the old is
equivalent to:
static const struct x86_cpu_id intel_cod_cpu[] = {
[0] = { .vendor = 0, .family = 6, .model = 0x3F, .steppings = 0, .feature = 0, .driver_data = 0 },
[1] = { .vendor = 0, .family = 6, .model = 0x4F, .steppings = 0, .feature = 0, .driver_data = 0 },
[2] = { .vendor = 0, .family = 6, .model = 0x00, .steppings = 0, .feature = 0, .driver_data = 1 },
[3] = { .vendor = 0, .family = 0, .model = 0x00, .steppings = 0, .feature = 0, .driver_data = 0 }
}
while the new code expands to:
static const struct x86_cpu_id intel_cod_cpu[] = {
[0] = { .vendor = 0, .family = 6, .model = 0x3F, .steppings = 0, .feature = 0, .driver_data = 0 },
[1] = { .vendor = 0, .family = 6, .model = 0x4F, .steppings = 0, .feature = 0, .driver_data = 0 },
[2] = { .vendor = 0, .family = 0, .model = 0x00, .steppings = 0, .feature = 0, .driver_data = 1 },
[3] = { .vendor = 0, .family = 0, .model = 0x00, .steppings = 0, .feature = 0, .driver_data = 0 }
}
Looking at the code for x86_match_cpu():
const struct x86_cpu_id *x86_match_cpu(const struct x86_cpu_id *match)
{
const struct x86_cpu_id *m;
struct cpuinfo_x86 *c = &boot_cpu_data;
for (m = match;
m->vendor | m->family | m->model | m->steppings | m->feature;
m++) {
...
}
return NULL;
it is clear that there was no match because the ANY entry in the table (array
index 2) is now the loop termination condition (all of vendor, family, model,
steppings, and feature are zero).
So this code was working before because the "ANY" check was looking for any
Intel CPU in family 6. But fails now because the family is a wild card. So the
root cause is that x86_match_cpu() has never been able to match on a rule with
just X86_VENDOR_INTEL and all other fields set to wildcards.
Add a new flags field to struct x86_cpu_id that has a bit set to indicate that
this entry in the array is valid. Update X86_MATCH*() macros to set that bit.
Change the end-marker check in x86_match_cpu() to just check the flags field
for this bit.
Backporter notes: The commit in Fixes is really the one that is broken:
you can't have m->vendor as part of the loop termination conditional in
x86_match_cpu() because it can happen - as it has happened above
- that that whole conditional is 0 albeit vendor == 0 is a valid case
- X86_VENDOR_INTEL is 0.
However, the only case where the above happens is the SNC check added by
4db64279bc2b1 so you only need this fix if you have backported that
other commit
4db64279bc2b ("x86/cpu: Switch to new Intel CPU model defines")
Fixes: 644e9cbbe3fc ("Add driver auto probing for x86 features v4")
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: <stable+noautosel@kernel.org> # see above
Link: https://lore.kernel.org/r/20240517144312.GBZkdtAOuJZCvxhFbJ@fat_crate.local
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New CPU #defines encode vendor and family as well as model.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Link: https://lore.kernel.org/r/20240520224620.9480-2-tony.luck@intel.com
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The ACPI specification clearly states how the processors should be
enumerated in the MADT:
"To ensure that the boot processor is supported post initialization,
two guidelines should be followed. The first is that OSPM should
initialize processors in the order that they appear in the MADT. The
second is that platform firmware should list the boot processor as the
first processor entry in the MADT.
...
Failure of OSPM implementations and platform firmware to abide by
these guidelines can result in both unpredictable and non optimal
platform operation."
The kernel relies on that ordering to detect the real BSP on crash kernels
which is important to avoid sending a INIT IPI to it as that would cause a
full machine reset.
On a Dell XPS 16 9640 the BIOS ignores this rule and enumerates the CPUs in
the wrong order. As a consequence the kernel falsely detects a crash kernel
and disables the corresponding CPU.
Prevent this by checking the IA32_APICBASE MSR for the BSP bit on the boot
CPU. If that bit is set, then the MADT based BSP detection can be safely
ignored. If the kernel detects a mismatch between the BSP bit and the first
enumerated MADT entry then emit a firmware bug message.
This obviously also has to be taken into account when the boot APIC ID and
the first enumerated APIC ID match. If the boot CPU does not have the BSP
bit set in the APICBASE MSR then there is no way for the boot CPU to
determine which of the CPUs is the real BSP. Sending an INIT to the real
BSP would reset the machine so the only sane way to deal with that is to
limit the number of CPUs to one and emit a corresponding warning message.
Fixes: 5c5682b9f87a ("x86/cpu: Detect real BSP on crash kernels")
Reported-by: Carsten Tolkmit <ctolkmit@ennit.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Carsten Tolkmit <ctolkmit@ennit.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/87le48jycb.ffs@tglx
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218837
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It took me some time to understand the purpose of the tricky code at
the end of arch/x86/Kconfig.debug.
Without it, the following would be shown:
WARNING: unmet direct dependencies detected for FRAME_POINTER
because
81d387190039 ("x86/kconfig: Consolidate unwinders into multiple choice selection")
removed 'select ARCH_WANT_FRAME_POINTERS'.
The correct and more straightforward approach should have been to move
it where 'select FRAME_POINTER' is located.
Several architectures properly handle the conditional selection of
ARCH_WANT_FRAME_POINTERS. For example, 'config UNWINDER_FRAME_POINTER'
in arch/arm/Kconfig.debug.
Fixes: 81d387190039 ("x86/kconfig: Consolidate unwinders into multiple choice selection")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Link: https://lore.kernel.org/r/20240204122003.53795-1-masahiroy@kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux
Pull UML updates from Richard Weinberger:
- Fixes for -Wmissing-prototypes warnings and further cleanup
- Remove callback returning void from rtc and virtio drivers
- Fix bash location
* tag 'uml-for-linus-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux: (26 commits)
um: virtio_uml: Convert to platform remove callback returning void
um: rtc: Convert to platform remove callback returning void
um: Remove unused do_get_thread_area function
um: Fix -Wmissing-prototypes warnings for __vdso_*
um: Add an internal header shared among the user code
um: Fix the declaration of kasan_map_memory
um: Fix the -Wmissing-prototypes warning for get_thread_reg
um: Fix the -Wmissing-prototypes warning for __switch_mm
um: Fix -Wmissing-prototypes warnings for (rt_)sigreturn
um: Stop tracking host PID in cpu_tasks
um: process: remove unused 'n' variable
um: vector: remove unused len variable/calculation
um: vector: fix bpfflash parameter evaluation
um: slirp: remove set but unused variable 'pid'
um: signal: move pid variable where needed
um: Makefile: use bash from the environment
um: Add winch to winch_handlers before registering winch IRQ
um: Fix -Wmissing-prototypes warnings for __warp_* and foo
um: Fix -Wmissing-prototypes warnings for text_poke*
um: Move declarations to proper headers
...
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The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.
To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().
Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
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The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.
To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().
Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
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It's not used since it was introduced by commit aa6758d4867c ("[PATCH]
uml: implement {get,set}_thread_area for i386"). Now, it's causing a
-Wmissing-prototypes warning:
arch/x86/um/tls_32.c:39:5: warning: no previous prototype for ‘do_get_thread_area’ [-Wmissing-prototypes]
39 | int do_get_thread_area(struct user_desc *info)
| ^~~~~~~~~~~~~~~~~~
The original author also had doubts about whether it should be used.
Considering that 18 years have passed, let's just remove it.
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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The VDSO functions are defined as globals and intended to be called
from userspace. Let's just workaround the -Wmissing-prototypes warnings
by declaring them locally.
This will address below -Wmissing-prototypes warnings:
arch/x86/um/vdso/um_vdso.c:16:5: warning: no previous prototype for ‘__vdso_clock_gettime’ [-Wmissing-prototypes]
arch/x86/um/vdso/um_vdso.c:30:5: warning: no previous prototype for ‘__vdso_gettimeofday’ [-Wmissing-prototypes]
arch/x86/um/vdso/um_vdso.c:44:21: warning: no previous prototype for ‘__vdso_time’ [-Wmissing-prototypes]
arch/x86/um/vdso/um_vdso.c:57:1: warning: no previous prototype for ‘__vdso_getcpu’ [-Wmissing-prototypes]
While at it, also fix the "WARNING: Prefer 'unsigned int *' to bare
use of 'unsigned *'" checkpatch warning.
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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Move relevant declarations to this header. This will address
below -Wmissing-prototypes warnings:
arch/um/os-Linux/elf_aux.c:26:13: warning: no previous prototype for ‘scan_elf_aux’ [-Wmissing-prototypes]
arch/um/os-Linux/mem.c:213:13: warning: no previous prototype for ‘check_tmpexec’ [-Wmissing-prototypes]
arch/um/os-Linux/skas/process.c:107:6: warning: no previous prototype for ‘wait_stub_done’ [-Wmissing-prototypes]
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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Make it match its definition (size_t vs unsigned long). And declare
it in a shared header to fix the -Wmissing-prototypes warning, as it
is defined in the user code and called in the kernel code.
Fixes: 5b301409e8bc ("UML: add support for KASAN under x86_64")
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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The get_thread_reg function is defined in the user code, and is
called by the kernel code. It should be declared in a shared header.
Fixes: dbba7f704aa0 ("um: stop polluting the namespace with registers.h contents")
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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The __switch_mm function is defined in the user code, and is called
by the kernel code. It should be declared in a shared header.
Fixes: 4dc706c2f292 ("um: take um_mmu.h to asm/mmu.h, clean asm/mmu_context.h a bit")
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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Use SYSCALL_DEFINE0 to define (rt_)sigreturn. This will address
below -Wmissing-prototypes warnings:
arch/x86/um/signal.c:453:6: warning: no previous prototype for ‘sys_sigreturn’ [-Wmissing-prototypes]
arch/x86/um/signal.c:560:6: warning: no previous prototype for ‘sys_rt_sigreturn’ [-Wmissing-prototypes]
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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The host PID tracked in 'cpu_tasks' is no longer used. Stopping
tracking it will also save some cycles.
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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The return value of fn() wasn't used for a long time,
so no need to assign it to a variable, addressing a
W=1 warning.
This seems to be - with patches from others posted to
the list before - the last W=1 warning in arch/um/.
Fixes: 22e2430d60db ("x86, um: convert to saner kernel_execve() semantics")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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The len variable is unused, so not needed, remove it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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With W=1 the build complains about a pointer compared to
zero, clearly the result should've been compared.
Fixes: 9807019a62dc ("um: Loadable BPF "Firmware" for vector drivers")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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The code doesn't use 'pid' here, just remove it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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We have W=1 warnings on 64-bit because the pid is only
used in branches on 32-bit; move it inside to get rid of
the warnings.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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Set Makefile SHELL to bash instead of /bin/bash for better portability.
Some systems do not install binaries to /bin, and therefore do not
provide /bin/bash. This includes Linux distros which intentionally avoid
implementing the Filesystem Hierarchy Standard (FHS), such as NixOS and
Guix System.
The recipies inside arch/um/Makefile don't require top-level Bash to
build, and setting "SHELL" to "bash" makes Make pick the Bash executable
from the environment, hence this patch.
Changes since last roll:
- Rebase onto a more recent commit on the master branch.
- Remove a dangling in-text citation from the change log.
- Reword the change log.
Signed-off-by: Yueh-Shun Li <shamrocklee@posteo.net>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net
Signed-off-by: Richard Weinberger <richard@nod.at>
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Registering a winch IRQ is racy, an interrupt may occur before the winch is
added to the winch_handlers list.
If that happens, register_winch_irq() adds to that list a winch that is
scheduled to be (or has already been) freed, causing a panic later in
winch_cleanup().
Avoid the race by adding the winch to the winch_handlers list before
registering the IRQ, and rolling back if um_request_irq() fails.
Fixes: 42a359e31a0e ("uml: SIGIO support cleanup")
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Richard Weinberger <richard@nod.at>
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These functions are not called explicitly. Let's just workaround
the -Wmissing-prototypes warnings by declaring them locally similar
to what was done in arch/x86/kernel/asm-offsets_32.c.
This will address below -Wmissing-prototypes warnings:
./arch/x86/um/shared/sysdep/kernel-offsets.h:9:6: warning: no previous prototype for ‘foo’ [-Wmissing-prototypes]
arch/um/os-Linux/main.c:187:7: warning: no previous prototype for ‘__wrap_malloc’ [-Wmissing-prototypes]
arch/um/os-Linux/main.c:208:7: warning: no previous prototype for ‘__wrap_calloc’ [-Wmissing-prototypes]
arch/um/os-Linux/main.c:222:6: warning: no previous prototype for ‘__wrap_free’ [-Wmissing-prototypes]
arch/x86/um/user-offsets.c:17:6: warning: no previous prototype for ‘foo’ [-Wmissing-prototypes]
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
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