| Commit message (Collapse) | Author | Age | Files | Lines |
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This patch fixes the following warning:
=============================
WARNING: suspicious RCU usage
5.7.0-rc4-next-20200507-syzkaller #0 Not tainted
-----------------------------
net/ipv6/ip6mr.c:124 RCU-list traversed in non-reader section!!
ipmr_new_table() returns an existing table, but there is no table at
init. Therefore the condition: either holding rtnl or the list is empty
is used.
Fixes: d1db275dd3f6e ("ipv6: ip6mr: support multiple tables")
Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull networking fixes from David Miller:
1) Fix sk_psock reference count leak on receive, from Xiyu Yang.
2) CONFIG_HNS should be invisible, from Geert Uytterhoeven.
3) Don't allow locking route MTUs in ipv6, RFCs actually forbid this,
from Maciej Żenczykowski.
4) ipv4 route redirect backoff wasn't actually enforced, from Paolo
Abeni.
5) Fix netprio cgroup v2 leak, from Zefan Li.
6) Fix infinite loop on rmmod in conntrack, from Florian Westphal.
7) Fix tcp SO_RCVLOWAT hangs, from Eric Dumazet.
8) Various bpf probe handling fixes, from Daniel Borkmann.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (68 commits)
selftests: mptcp: pm: rm the right tmp file
dpaa2-eth: properly handle buffer size restrictions
bpf: Restrict bpf_trace_printk()'s %s usage and add %pks, %pus specifier
bpf: Add bpf_probe_read_{user, kernel}_str() to do_refine_retval_range
bpf: Restrict bpf_probe_read{, str}() only to archs where they work
MAINTAINERS: Mark networking drivers as Maintained.
ipmr: Add lockdep expression to ipmr_for_each_table macro
ipmr: Fix RCU list debugging warning
drivers: net: hamradio: Fix suspicious RCU usage warning in bpqether.c
net: phy: broadcom: fix BCM54XX_SHD_SCR3_TRDDAPD value for BCM54810
tcp: fix error recovery in tcp_zerocopy_receive()
MAINTAINERS: Add Jakub to networking drivers.
MAINTAINERS: another add of Karsten Graul for S390 networking
drivers: ipa: fix typos for ipa_smp2p structure doc
pppoe: only process PADT targeted at local interfaces
selftests/bpf: Enforce returning 0 for fentry/fexit programs
bpf: Enforce returning 0 for fentry/fexit progs
net: stmmac: fix num_por initialization
security: Fix the default value of secid_to_secctx hook
libbpf: Fix register naming in PT_REGS s390 macros
...
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Alexei Starovoitov says:
====================
pull-request: bpf 2020-05-15
The following pull-request contains BPF updates for your *net* tree.
We've added 9 non-merge commits during the last 2 day(s) which contain
a total of 14 files changed, 137 insertions(+), 43 deletions(-).
The main changes are:
1) Fix secid_to_secctx LSM hook default value, from Anders.
2) Fix bug in mmap of bpf array, from Andrii.
3) Restrict bpf_probe_read to archs where they work, from Daniel.
4) Enforce returning 0 for fentry/fexit progs, from Yonghong.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Daniel Borkmann says:
====================
Small set of fixes in order to restrict BPF helpers for tracing which are
broken on archs with overlapping address ranges as per discussion in [0].
I've targetted this for -bpf tree so they can be routed as fixes. Thanks!
v1 -> v2:
- switch to reusable %pks, %pus format specifiers (Yonghong)
- fixate %s on kernel_ds probing for archs with overlapping addr space
[0] https://lore.kernel.org/bpf/CAHk-=wjJKo0GVixYLmqPn-Q22WFu0xHaBSjKEo7e7Yw72y5SPQ@mail.gmail.com/T/
====================
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Usage of plain %s conversion specifier in bpf_trace_printk() suffers from the
very same issue as bpf_probe_read{,str}() helpers, that is, it is broken on
archs with overlapping address ranges.
While the helpers have been addressed through work in 6ae08ae3dea2 ("bpf: Add
probe_read_{user, kernel} and probe_read_{user, kernel}_str helpers"), we need
an option for bpf_trace_printk() as well to fix it.
Similarly as with the helpers, force users to make an explicit choice by adding
%pks and %pus specifier to bpf_trace_printk() which will then pick the corresponding
strncpy_from_unsafe*() variant to perform the access under KERNEL_DS or USER_DS.
The %pk* (kernel specifier) and %pu* (user specifier) can later also be extended
for other objects aside strings that are probed and printed under tracing, and
reused out of other facilities like bpf_seq_printf() or BTF based type printing.
Existing behavior of %s for current users is still kept working for archs where it
is not broken and therefore gated through CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE.
For archs not having this property we fall-back to pick probing under KERNEL_DS as
a sensible default.
Fixes: 8d3b7dce8622 ("bpf: add support for %s specifier to bpf_trace_printk()")
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Link: https://lore.kernel.org/bpf/20200515101118.6508-4-daniel@iogearbox.net
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Given bpf_probe_read{,str}() BPF helpers are now only available under
CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE, we need to add the drop-in
replacements of bpf_probe_read_{kernel,user}_str() to do_refine_retval_range()
as well to avoid hitting the same issue as in 849fa50662fbc ("bpf/verifier:
refine retval R0 state for bpf_get_stack helper").
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200515101118.6508-3-daniel@iogearbox.net
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Given the legacy bpf_probe_read{,str}() BPF helpers are broken on archs
with overlapping address ranges, we should really take the next step to
disable them from BPF use there.
To generally fix the situation, we've recently added new helper variants
bpf_probe_read_{user,kernel}() and bpf_probe_read_{user,kernel}_str().
For details on them, see 6ae08ae3dea2 ("bpf: Add probe_read_{user, kernel}
and probe_read_{user,kernel}_str helpers").
Given bpf_probe_read{,str}() have been around for ~5 years by now, there
are plenty of users at least on x86 still relying on them today, so we
cannot remove them entirely w/o breaking the BPF tracing ecosystem.
However, their use should be restricted to archs with non-overlapping
address ranges where they are working in their current form. Therefore,
move this behind a CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE and
have x86, arm64, arm select it (other archs supporting it can follow-up
on it as well).
For the remaining archs, they can workaround easily by relying on the
feature probe from bpftool which spills out defines that can be used out
of BPF C code to implement the drop-in replacement for old/new kernels
via: bpftool feature probe macro
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/bpf/20200515101118.6508-2-daniel@iogearbox.net
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There are a few fentry/fexit programs returning non-0.
The tests with these programs will break with the previous
patch which enfoced return-0 rules. Fix them properly.
Fixes: ac065870d928 ("selftests/bpf: Add BPF_PROG, BPF_KPROBE, and BPF_KRETPROBE macros")
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200514053207.1298479-1-yhs@fb.com
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Currently, tracing/fentry and tracing/fexit prog
return values are not enforced. In trampoline codes,
the fentry/fexit prog return values are ignored.
Let us enforce it to be 0 to avoid confusion and
allows potential future extension.
This patch also explicitly added return value
checking for tracing/raw_tp, tracing/fmod_ret,
and freplace programs such that these program
return values can be anything. The purpose are
two folds:
1. to make it explicit about return value expectations
for these programs in verifier.
2. for tracing prog_type, if a future attach type
is added, the default is -ENOTSUPP which will
enforce to specify return value ranges explicitly.
Fixes: fec56f5890d9 ("bpf: Introduce BPF trampoline")
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200514053206.1298415-1-yhs@fb.com
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security_secid_to_secctx is called by the bpf_lsm hook and a successful
return value (i.e 0) implies that the parameter will be consumed by the
LSM framework. The current behaviour return success when the pointer
isn't initialized when CONFIG_BPF_LSM is enabled, with the default
return from kernel/bpf/bpf_lsm.c.
This is the internal error:
[ 1229.341488][ T2659] usercopy: Kernel memory exposure attempt detected from null address (offset 0, size 280)!
[ 1229.374977][ T2659] ------------[ cut here ]------------
[ 1229.376813][ T2659] kernel BUG at mm/usercopy.c:99!
[ 1229.378398][ T2659] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
[ 1229.380348][ T2659] Modules linked in:
[ 1229.381654][ T2659] CPU: 0 PID: 2659 Comm: systemd-journal Tainted: G B W 5.7.0-rc5-next-20200511-00019-g864e0c6319b8-dirty #13
[ 1229.385429][ T2659] Hardware name: linux,dummy-virt (DT)
[ 1229.387143][ T2659] pstate: 80400005 (Nzcv daif +PAN -UAO BTYPE=--)
[ 1229.389165][ T2659] pc : usercopy_abort+0xc8/0xcc
[ 1229.390705][ T2659] lr : usercopy_abort+0xc8/0xcc
[ 1229.392225][ T2659] sp : ffff000064247450
[ 1229.393533][ T2659] x29: ffff000064247460 x28: 0000000000000000
[ 1229.395449][ T2659] x27: 0000000000000118 x26: 0000000000000000
[ 1229.397384][ T2659] x25: ffffa000127049e0 x24: ffffa000127049e0
[ 1229.399306][ T2659] x23: ffffa000127048e0 x22: ffffa000127048a0
[ 1229.401241][ T2659] x21: ffffa00012704b80 x20: ffffa000127049e0
[ 1229.403163][ T2659] x19: ffffa00012704820 x18: 0000000000000000
[ 1229.405094][ T2659] x17: 0000000000000000 x16: 0000000000000000
[ 1229.407008][ T2659] x15: 0000000000000000 x14: 003d090000000000
[ 1229.408942][ T2659] x13: ffff80000d5b25b2 x12: 1fffe0000d5b25b1
[ 1229.410859][ T2659] x11: 1fffe0000d5b25b1 x10: ffff80000d5b25b1
[ 1229.412791][ T2659] x9 : ffffa0001034bee0 x8 : ffff00006ad92d8f
[ 1229.414707][ T2659] x7 : 0000000000000000 x6 : ffffa00015eacb20
[ 1229.416642][ T2659] x5 : ffff0000693c8040 x4 : 0000000000000000
[ 1229.418558][ T2659] x3 : ffffa0001034befc x2 : d57a7483a01c6300
[ 1229.420610][ T2659] x1 : 0000000000000000 x0 : 0000000000000059
[ 1229.422526][ T2659] Call trace:
[ 1229.423631][ T2659] usercopy_abort+0xc8/0xcc
[ 1229.425091][ T2659] __check_object_size+0xdc/0x7d4
[ 1229.426729][ T2659] put_cmsg+0xa30/0xa90
[ 1229.428132][ T2659] unix_dgram_recvmsg+0x80c/0x930
[ 1229.429731][ T2659] sock_recvmsg+0x9c/0xc0
[ 1229.431123][ T2659] ____sys_recvmsg+0x1cc/0x5f8
[ 1229.432663][ T2659] ___sys_recvmsg+0x100/0x160
[ 1229.434151][ T2659] __sys_recvmsg+0x110/0x1a8
[ 1229.435623][ T2659] __arm64_sys_recvmsg+0x58/0x70
[ 1229.437218][ T2659] el0_svc_common.constprop.1+0x29c/0x340
[ 1229.438994][ T2659] do_el0_svc+0xe8/0x108
[ 1229.440587][ T2659] el0_svc+0x74/0x88
[ 1229.441917][ T2659] el0_sync_handler+0xe4/0x8b4
[ 1229.443464][ T2659] el0_sync+0x17c/0x180
[ 1229.444920][ T2659] Code: aa1703e2 aa1603e1 910a8260 97ecc860 (d4210000)
[ 1229.447070][ T2659] ---[ end trace 400497d91baeaf51 ]---
[ 1229.448791][ T2659] Kernel panic - not syncing: Fatal exception
[ 1229.450692][ T2659] Kernel Offset: disabled
[ 1229.452061][ T2659] CPU features: 0x240002,20002004
[ 1229.453647][ T2659] Memory Limit: none
[ 1229.455015][ T2659] ---[ end Kernel panic - not syncing: Fatal exception ]---
Rework the so the default return value is -EOPNOTSUPP.
There are likely other callbacks such as security_inode_getsecctx() that
may have the same problem, and that someone that understand the code
better needs to audit them.
Thank you Arnd for helping me figure out what went wrong.
Fixes: 98e828a0650f ("security: Refactor declaration of LSM hooks")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: James Morris <jamorris@linux.microsoft.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/bpf/20200512174607.9630-1-anders.roxell@linaro.org
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Fix register naming in PT_REGS s390 macros
Fixes: b8ebce86ffe6 ("libbpf: Provide CO-RE variants of PT_REGS macros")
Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200513154414.29972-1-sumanthk@linux.ibm.com
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mmap() subsystem allows user-space application to memory-map region with
initial page offset. This wasn't taken into account in initial implementation
of BPF array memory-mapping. This would result in wrong pages, not taking into
account requested page shift, being memory-mmaped into user-space. This patch
fixes this gap and adds a test for such scenario.
Fixes: fc9702273e2e ("bpf: Add mmap() support for BPF_MAP_TYPE_ARRAY")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200512235925.3817805-1-andriin@fb.com
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GCC 10 is very strict about symbol clash, and lwt_len_hist_user contains
a symbol which clashes with libbpf:
/usr/bin/ld: samples/bpf/lwt_len_hist_user.o:(.bss+0x0): multiple definition of `bpf_log_buf'; samples/bpf/bpf_load.o:(.bss+0x8c0): first defined here
collect2: error: ld returned 1 exit status
bpf_log_buf here seems to be a leftover, so removing it.
Signed-off-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200511113234.80722-1-mcroce@redhat.com
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"$err" is a variable pointing to a temp file. "$out" is not: only used
as a local variable in "check()" and representing the output of a
command line.
Fixes: eedbc685321b (selftests: add PM netlink functional tests)
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Depending on the WRIOP version, the buffer size on the RX path must by a
multiple of 64 or 256. Handle this restriction properly by aligning down
the buffer size to the necessary value. Also, use the new buffer size
dynamically computed instead of the compile time one.
Fixes: 27c874867c4e ("dpaa2-eth: Use a single page per Rx buffer")
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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During the initialization process, ipmr_new_table() is called
to create new tables which in turn calls ipmr_get_table() which
traverses net->ipv4.mr_tables without holding the writer lock.
However, this is safe to do so as no tables exist at this time.
Hence add a suitable lockdep expression to silence the following
false-positive warning:
=============================
WARNING: suspicious RCU usage
5.7.0-rc3-next-20200428-syzkaller #0 Not tainted
-----------------------------
net/ipv4/ipmr.c:136 RCU-list traversed in non-reader section!!
ipmr_get_table+0x130/0x160 net/ipv4/ipmr.c:136
ipmr_new_table net/ipv4/ipmr.c:403 [inline]
ipmr_rules_init net/ipv4/ipmr.c:248 [inline]
ipmr_net_init+0x133/0x430 net/ipv4/ipmr.c:3089
Fixes: f0ad0860d01e ("ipv4: ipmr: support multiple tables")
Reported-by: syzbot+1519f497f2f9f08183c6@syzkaller.appspotmail.com
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Amol Grover <frextrite@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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ipmr_for_each_table() macro uses list_for_each_entry_rcu()
for traversing outside of an RCU read side critical section
but under the protection of rtnl_mutex. Hence, add the
corresponding lockdep expression to silence the following
false-positive warning at boot:
[ 4.319347] =============================
[ 4.319349] WARNING: suspicious RCU usage
[ 4.319351] 5.5.4-stable #17 Tainted: G E
[ 4.319352] -----------------------------
[ 4.319354] net/ipv4/ipmr.c:1757 RCU-list traversed in non-reader section!!
Fixes: f0ad0860d01e ("ipv4: ipmr: support multiple tables")
Signed-off-by: Amol Grover <frextrite@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch fixes the following warning:
=============================
WARNING: suspicious RCU usage
5.7.0-rc5-next-20200514-syzkaller #0 Not tainted
-----------------------------
drivers/net/hamradio/bpqether.c:149 RCU-list traversed in non-reader section!!
Since rtnl lock is held, pass this cond in list_for_each_entry_rcu().
Reported-by: syzbot+bb82cafc737c002d11ca@syzkaller.appspotmail.com
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Set the correct bit when checking for PHY_BRCM_DIS_TXCRXC_NOENRGY on the
BCM54810 PHY.
Fixes: 0ececcfc9267 ("net: phy: broadcom: Allow BCM54810 to use bcm54xx_adjust_rxrefclk()")
Signed-off-by: Kevin Lo <kevlo@kevlo.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If user provides wrong virtual address in TCP_ZEROCOPY_RECEIVE
operation we want to return -EINVAL error.
But depending on zc->recv_skip_hint content, we might return
-EIO error if the socket has SOCK_DONE set.
Make sure to return -EINVAL in this case.
BUG: KMSAN: uninit-value in tcp_zerocopy_receive net/ipv4/tcp.c:1833 [inline]
BUG: KMSAN: uninit-value in do_tcp_getsockopt+0x4494/0x6320 net/ipv4/tcp.c:3685
CPU: 1 PID: 625 Comm: syz-executor.0 Not tainted 5.7.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x220 lib/dump_stack.c:118
kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
__msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
tcp_zerocopy_receive net/ipv4/tcp.c:1833 [inline]
do_tcp_getsockopt+0x4494/0x6320 net/ipv4/tcp.c:3685
tcp_getsockopt+0xf8/0x1f0 net/ipv4/tcp.c:3728
sock_common_getsockopt+0x13f/0x180 net/core/sock.c:3131
__sys_getsockopt+0x533/0x7b0 net/socket.c:2177
__do_sys_getsockopt net/socket.c:2192 [inline]
__se_sys_getsockopt+0xe1/0x100 net/socket.c:2189
__x64_sys_getsockopt+0x62/0x80 net/socket.c:2189
do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c829
Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1deeb72c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00000000004e01e0 RCX: 000000000045c829
RDX: 0000000000000023 RSI: 0000000000000006 RDI: 0000000000000009
RBP: 000000000078bf00 R08: 0000000020000200 R09: 0000000000000000
R10: 00000000200001c0 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000001d8 R14: 00000000004d3038 R15: 00007f1deeb736d4
Local variable ----zc@do_tcp_getsockopt created at:
do_tcp_getsockopt+0x1a74/0x6320 net/ipv4/tcp.c:3670
do_tcp_getsockopt+0x1a74/0x6320 net/ipv4/tcp.c:3670
Fixes: 05255b823a61 ("tcp: add TCP_ZEROCOPY_RECEIVE support for zerocopy receive")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pablo Neira Ayuso says:
====================
Netfilter fixes for net
The following patchset contains Netfilter fixes for net:
1) Fix gcc-10 compilation warning in nf_conntrack, from Arnd Bergmann.
2) Add NF_FLOW_HW_PENDING to avoid races between stats and deletion
commands, from Paul Blakey.
3) Remove WQ_MEM_RECLAIM from the offload workqueue, from Roi Dayan.
4) Infinite loop when removing nf_conntrack module, from Florian Westphal.
5) Set NF_FLOW_TEARDOWN bit on expiration to avoid races when refreshing
the timeout from the software path.
6) Missing nft_set_elem_expired() check in the rbtree, from Phil Sutter.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Expired intervals would still match and be dumped to user space until
garbage collection wiped them out. Make sure they stop matching and
disappear (from users' perspective) as soon as they expire.
Fixes: 8d8540c4f5e03 ("netfilter: nft_set_rbtree: add timeout support")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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If the flow timer expires, the gc sets on the NF_FLOW_TEARDOWN flag.
Otherwise, the flowtable software path might race to refresh the
timeout, leaving the state machine in inconsistent state.
Fixes: c29f74e0df7a ("netfilter: nf_flow_table: hardware offload support")
Reported-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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'rmmod nf_conntrack' can hang forever, because the netns exit
gets stuck in nf_conntrack_cleanup_net_list():
i_see_dead_people:
busy = 0;
list_for_each_entry(net, net_exit_list, exit_list) {
nf_ct_iterate_cleanup(kill_all, net, 0, 0);
if (atomic_read(&net->ct.count) != 0)
busy = 1;
}
if (busy) {
schedule();
goto i_see_dead_people;
}
When nf_ct_iterate_cleanup iterates the conntrack table, all nf_conn
structures can be found twice:
once for the original tuple and once for the conntracks reply tuple.
get_next_corpse() only calls the iterator when the entry is
in original direction -- the idea was to avoid unneeded invocations
of the iterator callback.
When support for clashing entries was added, the assumption that
all nf_conn objects are added twice, once in original, once for reply
tuple no longer holds -- NF_CLASH_BIT entries are only added in
the non-clashing reply direction.
Thus, if at least one NF_CLASH entry is in the list then
nf_conntrack_cleanup_net_list() always skips it completely.
During normal netns destruction, this causes a hang of several
seconds, until the gc worker removes the entry (NF_CLASH entries
always have a 1 second timeout).
But in the rmmod case, the gc worker has already been stopped, so
ct.count never becomes 0.
We can fix this in two ways:
1. Add a second test for CLASH_BIT and call iterator for those
entries as well, or:
2. Skip the original tuple direction and use the reply tuple.
2) is simpler, so do that.
Fixes: 6a757c07e51f80ac ("netfilter: conntrack: allow insertion of clashing entries")
Reported-by: Chen Yi <yiche@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This workqueue is in charge of handling offloaded flow tasks like
add/del/stats we should not use WQ_MEM_RECLAIM flag.
The flag can result in the following warning.
[ 485.557189] ------------[ cut here ]------------
[ 485.562976] workqueue: WQ_MEM_RECLAIM nf_flow_table_offload:flow_offload_worr
[ 485.562985] WARNING: CPU: 7 PID: 3731 at kernel/workqueue.c:2610 check_flush0
[ 485.590191] Kernel panic - not syncing: panic_on_warn set ...
[ 485.597100] CPU: 7 PID: 3731 Comm: kworker/u112:8 Not tainted 5.7.0-rc1.21802
[ 485.606629] Hardware name: Dell Inc. PowerEdge R730/072T6D, BIOS 2.4.3 01/177
[ 485.615487] Workqueue: nf_flow_table_offload flow_offload_work_handler [nf_f]
[ 485.624834] Call Trace:
[ 485.628077] dump_stack+0x50/0x70
[ 485.632280] panic+0xfb/0x2d7
[ 485.636083] ? check_flush_dependency+0x110/0x130
[ 485.641830] __warn.cold.12+0x20/0x2a
[ 485.646405] ? check_flush_dependency+0x110/0x130
[ 485.652154] ? check_flush_dependency+0x110/0x130
[ 485.657900] report_bug+0xb8/0x100
[ 485.662187] ? sched_clock_cpu+0xc/0xb0
[ 485.666974] do_error_trap+0x9f/0xc0
[ 485.671464] do_invalid_op+0x36/0x40
[ 485.675950] ? check_flush_dependency+0x110/0x130
[ 485.681699] invalid_op+0x28/0x30
Fixes: 7da182a998d6 ("netfilter: flowtable: Use work entry per offload command")
Reported-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Gc step can queue offloaded flow del work or stats work.
Those work items can race each other and a flow could be freed
before the stats work is executed and querying it.
To avoid that, add a pending bit that if a work exists for a flow
don't queue another work for it.
This will also avoid adding multiple stats works in case stats work
didn't complete but gc step started again.
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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gcc-10 warns around a suspicious access to an empty struct member:
net/netfilter/nf_conntrack_core.c: In function '__nf_conntrack_alloc':
net/netfilter/nf_conntrack_core.c:1522:9: warning: array subscript 0 is outside the bounds of an interior zero-length array 'u8[0]' {aka 'unsigned char[0]'} [-Wzero-length-bounds]
1522 | memset(&ct->__nfct_init_offset[0], 0,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from net/netfilter/nf_conntrack_core.c:37:
include/net/netfilter/nf_conntrack.h:90:5: note: while referencing '__nfct_init_offset'
90 | u8 __nfct_init_offset[0];
| ^~~~~~~~~~~~~~~~~~
The code is correct but a bit unusual. Rework it slightly in a way that
does not trigger the warning, using an empty struct instead of an empty
array. There are probably more elegant ways to do this, but this is the
smallest change.
Fixes: c41884ce0562 ("netfilter: conntrack: avoid zeroing timer")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Complete adding of Karsten as maintainer for all S390 networking
parts in the kernel.
Cc: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Remove the duplicate "mutex", and change "Motex" to "Mutex". Also I
recommend it's easier for understanding to make the "ready-interrupt"
a bundle for it is a parallel description as "shutdown" which is appended
after the slash.
Signed-off-by: Wang Wenhu <wenhu.wang@vivo.com>
Cc: Alex Elder <elder@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We don't want to disconnect a session because of a stray PADT arriving
while the interface is in promiscuous mode.
Furthermore, multicast and broadcast packets make no sense here, so
only PACKET_HOST is accepted.
Reported-by: David Balažic <xerces9@gmail.com>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Driver missed initializing num_por which is one of the por values that
driver configures to hardware. In order to get these values, add a new
structure ethqos_emac_driver_data which holds por and num_por values
and populate that in driver probe.
Fixes: a7c30e62d4b8 ("net: stmmac: Add driver for Qualcomm ethqos")
Reported-by: Rahul Ankushrao Kawadgave <rahulak@qti.qualcomm.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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phy_restart_aneg() enables aneg in the PHY. That's not what we want
if phydev->autoneg is disabled. In this case still update EEE
advertisement register, but don't enable aneg and don't trigger an
aneg restart.
Fixes: f75abeb8338e ("net: phy: restart phy autonegotiation after EEE advertisment change")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The GENET controller on the Raspberry Pi 4 (2711) is typically
interfaced with an external Broadcom PHY via a RGMII electrical
interface. To make sure that delays are properly configured at the PHY
side, ensure that we the dedicated Broadcom PHY driver
(CONFIG_BROADCOM_PHY) is enabled for this to happen.
Fixes: 402482a6a78e ("net: bcmgenet: Clear ID_MODE_DIS in EXT_RGMII_OOB_CTRL when not needed")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Tuong Lien says:
====================
tipc: add some patches
This series adds patches to fix some issues in TIPC streaming & service
subscription.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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When a service subscription is expired or canceled by user, it needs to
be deleted from the subscription list, so that new subscriptions can be
registered (max = 65535 per net). However, there are two issues in code
that can cause such an unused subscription to persist:
1) The 'tipc_conn_delete_sub()' has a loop on the subscription list but
it makes a break shortly when the 1st subscription differs from the one
specified, so the subscription will not be deleted.
2) In case a subscription is canceled, the code to remove the
'TIPC_SUB_CANCEL' flag from the subscription filter does not work if it
is a local subscription (i.e. the little endian isn't involved). So, it
will be no matches when looking for the subscription to delete later.
The subscription(s) will be removed eventually when the user terminates
its topology connection but that could be a long time later. Meanwhile,
the number of available subscriptions may be exhausted.
This commit fixes the two issues above, so as needed a subscription can
be deleted correctly.
Acked-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Upon receipt of a service subscription request from user via a topology
connection, one 'sub' object will be allocated in kernel, so it will be
able to send an event of the service if any to the user correspondingly
then. Also, in case of any failure, the connection will be shutdown and
all the pertaining 'sub' objects will be freed.
However, there is a race condition as follows resulting in memory leak:
receive-work connection send-work
| | |
sub-1 |<------//-------| |
sub-2 |<------//-------| |
| |<---------------| evt for sub-x
sub-3 |<------//-------| |
: : :
: : :
| /--------| |
| | * peer closed |
| | | |
| | |<-------X-------| evt for sub-y
| | |<===============|
sub-n |<------/ X shutdown |
-> orphan | |
That is, the 'receive-work' may get the last subscription request while
the 'send-work' is shutting down the connection due to peer close.
We had a 'lock' on the connection, so the two actions cannot be carried
out simultaneously. If the last subscription is allocated e.g. 'sub-n',
before the 'send-work' closes the connection, there will be no issue at
all, the 'sub' objects will be freed. In contrast the last subscription
will become orphan since the connection was closed, and we released all
references.
This commit fixes the issue by simply adding one test if the connection
remains in 'connected' state right after we obtain the connection lock,
then a subscription object can be created as usual, otherwise we ignore
it.
Acked-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Jon Maloy <jmaloy@redhat.com>
Reported-by: Thang Ngo <thang.h.ngo@dektech.com.au>
Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently when a connection is in Nagle mode, we set the 'ack_required'
bit in the last sending buffer and wait for the corresponding ACK prior
to pushing more data. However, on the receiving side, the ACK is issued
only when application really reads the whole data. Even if part of the
last buffer is received, we will not do the ACK as required. This might
cause an unnecessary delay since the receiver does not always fetch the
message as fast as the sender, resulting in a large latency in the user
message sending, which is: [one RTT + the receiver processing time].
The commit makes Nagle ACK as soon as possible i.e. when a message with
the 'ack_required' arrives in the receiving side's stack even before it
is processed or put in the socket receive queue...
This way, we can limit the streaming latency to one RTT as committed in
Nagle mode.
Acked-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Ursula Braun says:
====================
s390/net: updates 2020-05-13
please apply the fix from Wei Yongjun to netdev's net tree and
add Karsten Graul as co-maintainer for drivers/s390/net.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add Karsten as additional maintainer for drivers/s390/net .
One of his focal points is the ism driver.
Cc: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix to return negative error code -ENOMEM from the smcd_alloc_dev()
error handling case instead of 0, as done elsewhere in this function.
Fixes: 684b89bc39ce ("s390/ism: add device driver for internal shared memory")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The cipso and calipso code can set the MLS_CAT attribute on
successful parsing, even if the corresponding catmap has
not been allocated, as per current configuration and external
input.
Later, selinux code tries to access the catmap if the MLS_CAT flag
is present via netlbl_catmap_getlong(). That may cause null ptr
dereference while processing incoming network traffic.
Address the issue setting the MLS_CAT flag only if the catmap is
really allocated. Additionally let netlbl_catmap_getlong() cope
with NULL catmap.
Reported-by: Matthew Sheets <matthew.sheets@gd-ms.com>
Fixes: 4b8feff251da ("netlabel: fix the horribly broken catmap functions")
Fixes: ceba1832b1b2 ("calipso: Set the calipso socket label to match the secattr.")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We autotune rcvbuf whenever SO_RCVLOWAT is set to account for 100%
overhead in tcp_set_rcvlowat()
This works well when skb->len/skb->truesize ratio is bigger than 0.5
But if we receive packets with small MSS, we can end up in a situation
where not enough bytes are available in the receive queue to satisfy
RCVLOWAT setting.
As our sk_rcvbuf limit is hit, we send zero windows in ACK packets,
preventing remote peer from sending more data.
Even autotuning does not help, because it only triggers at the time
user process drains the queue. If no EPOLLIN is generated, this
can not happen.
Note poll() has a similar issue, after commit
c7004482e8dc ("tcp: Respect SO_RCVLOWAT in tcp_poll().")
Fixes: 03f45c883c6f ("tcp: avoid extra wakeups for SO_RCVLOWAT users")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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My recent commit b6d49cab44b5 ("net: Make PTP-specific drivers depend on
PTP_1588_CLOCK") exposes a missing dependency in defconfigs that select
TI_CPTS without selecting PTP_1588_CLOCK, leading to linker errors of the
form:
drivers/net/ethernet/ti/cpsw.o: in function `cpsw_ndo_stop':
cpsw.c:(.text+0x680): undefined reference to `cpts_unregister'
...
That's because TI_CPTS_MOD (which is the symbol gating the _compilation_ of
cpts.c) now depends on PTP_1588_CLOCK, and so is not enabled in these
configurations, but TI_CPTS (which is the symbol gating _calls_ to the cpts
functions) _is_ enabled. So we end up compiling calls to functions that
don't exist, resulting in the linker errors.
This patch fixes build errors and restores previous behavior by:
- ensure PTP_1588_CLOCK=y in TI specific configs and CPTS will be built
- remove TI_CPTS_MOD and, instead, add dependencies from CPTS in
TI_CPSW/TI_KEYSTONE_NETCP/TI_CPSW_SWITCHDEV as below:
config TI_CPSW_SWITCHDEV
...
depends on TI_CPTS || !TI_CPTS
which will ensure proper dependencies PTP_1588_CLOCK -> TI_CPTS ->
TI_CPSW/TI_KEYSTONE_NETCP/TI_CPSW_SWITCHDEV and build type selection.
Note. For NFS boot + CPTS all of above configs have to be built-in.
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dan Murphy <dmurphy@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Fixes: b6d49cab44b5 ("net: Make PTP-specific drivers depend on PTP_1588_CLOCK")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Clay McClure <clay@daemons.net>
[grygorii.strashko@ti.com: rewording, add deps cpsw/netcp from cpts, drop IS_REACHABLE]
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Shannon Nelson says:
====================
ionic fixes
These are a couple more fixes after more fw-upgrade testing.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since the fw has been re-inited, we need to refresh the port
information dma address so we can see fresh port information.
Let's call ionic_port_init again, and tweak it to allow for
a call to simply refresh the existing dma address.
Fixes: c672412f6172 ("ionic: remove lifs on fw reset")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When running in a bond setup, or some other potential
configurations, the netdev mac may have been changed from
the default device mac. Since the userland doesn't know
about the changes going on under the covers in a fw-upgrade
it doesn't know the re-push the mac filter. The driver
needs to leave the netdev mac filter alone when rebuilding
after the fw-upgrade.
Fixes: c672412f6172 ("ionic: remove lifs on fw reset")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The do_aux_work callback had documentation in the structure comment
which referred to it as "do_work".
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When the other MPTCP-peer uses 32-bit data-sequence numbers, we rely on
map_seq to indicate how to expand to a 64-bit data-sequence number in
expand_seq() when receiving data.
For new subflows, this field is not initialized, thus results in an
"invalid" mapping being discarded.
Fix this by initializing map_seq upon subflow establishment time.
Fixes: f296234c98a8 ("mptcp: Add handling of incoming MP_JOIN requests")
Signed-off-by: Christoph Paasch <cpaasch@apple.com>
Reviewed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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