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2023-03-09dt-bindings: usb: allow evaluated properties in OHCI controllersRafał Miłecki1-1/+1
This binding uses usb-hcd.yaml so replace additionalProperties with unevaluatedProperties to allow generic USB HCD properties. It's how EHCI and XHCI bindings work too. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Acked-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230228152105.25358-1-zajec5@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-09dt-bindings: usb: usb-device: make "compatible" optionalRafał Miłecki1-1/+0
This binding was originally meant to describe hard-wired USB devices but in some situations we need to describe USB ports. That is needed e.g. if USB port is meant to be used as a trigger source but it can have any device plugged. It's a common case for home routers which have USB ports (with no hard-wired devices) and USB LEDs to indicate ports state. There is no point (and no easy way) to add separate binding covering just USB ports. Adjust existing devices binding to allow describing ports. This fixes: arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dtb: usb@21000: port@1: 'compatible' is a required property From schema: Documentation/devicetree/bindings/usb/generic-ehci.yaml arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dtb: usb@21000: port@2: 'compatible' is a required property From schema: Documentation/devicetree/bindings/usb/generic-ehci.yaml arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dtb: usb@21000: Unevaluated properties are not allowed ('#address-cells', '#size-cells', 'port@1', 'port@2' were unexpected) From schema: Documentation/devicetree/bindings/usb/generic-ehci.yaml arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dtb: usb@22000: port@1: 'compatible' is a required property From schema: Documentation/devicetree/bindings/usb/generic-ohci.yaml arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dtb: usb@22000: port@2: 'compatible' is a required property From schema: Documentation/devicetree/bindings/usb/generic-ohci.yaml arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dtb: usb@22000: Unevaluated properties are not allowed ('#address-cells', '#size-cells', 'port@1', 'port@2' were unexpected) From schema: Documentation/devicetree/bindings/usb/generic-ohci.yaml arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dtb: usb@23000: port@1: 'compatible' is a required property From schema: Documentation/devicetree/bindings/usb/generic-xhci.yaml arch/arm/boot/dts/bcm4708-asus-rt-ac56u.dtb: usb@23000: Unevaluated properties are not allowed ('#address-cells', '#size-cells', 'phy-names', 'phys', 'port@1' were unexpected) From schema: Documentation/devicetree/bindings/usb/generic-xhci.yaml Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230228182909.1011-1-zajec5@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-09dt-bindings: usb: snps,dwc3: document extcon propertyKrzysztof Kozlowski1-0/+4
The DWC3 USB Linux driver and several DTS use extcon property, so document it, even though it is deprecated, to fix warnings like: sm6125-sony-xperia-seine-pdx201.dtb: usb@4ef8800: usb@4e00000: Unevaluated properties are not allowed ('extcon' was unexpected) Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230304130302.51497-1-krzysztof.kozlowski@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-09usb: gadget: udc: renesas_usb3: remove R-Car H3 ES1.* handlingWolfram Sang1-22/+1
R-Car H3 ES1.* was only available to an internal development group and needed a lot of quirks and workarounds. These become a maintenance burden now, so our development group decided to remove upstream support and disable booting for this SoC. Public users only have ES2 onwards. Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://lore.kernel.org/r/20230307163041.3815-12-wsa+renesas@sang-engineering.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-09usb: host: xhci-rcar: remove R-Car H3 ES1.* handlingWolfram Sang1-29/+2
R-Car H3 ES1.* was only available to an internal development group and needed a lot of quirks and workarounds. These become a maintenance burden now, so our development group decided to remove upstream support and disable booting for this SoC. Public users only have ES2 onwards. Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://lore.kernel.org/r/20230307163041.3815-11-wsa+renesas@sang-engineering.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-09usb: host: xhci-rcar: remove leftover quirk handlingWolfram Sang1-3/+0
Loading V3 firmware does not need a quirk anymore, remove the leftover code. Fixes: ed8603e11124 ("usb: host: xhci-rcar: Simplify getting the firmware name for R-Car Gen3") Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://lore.kernel.org/r/20230307163041.3815-10-wsa+renesas@sang-engineering.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-09usb: host: oxu210hp-hcd: Replace fake flex-array with flexible-array memberGustavo A. R. Silva1-1/+1
Zero-length arrays as fake flexible arrays are deprecated and we are moving towards adopting C99 flexible-array members instead. Transform zero-length array into flexible-array member in struct ehci_regs. Address the following warnings found with GCC-13 and -fstrict-flex-arrays=3 enabled: drivers/usb/host/oxu210hp-hcd.c:3983:30: warning: array subscript i is outside array bounds of ‘u32[0]’ {aka ‘unsigned int[]’} [-Warray-bounds=] drivers/usb/host/oxu210hp-hcd.c:3986:38: warning: array subscript i is outside array bounds of ‘u32[0]’ {aka ‘unsigned int[]’} [-Warray-bounds=] drivers/usb/host/oxu210hp-hcd.c:3971:30: warning: array subscript i is outside array bounds of ‘u32[0]’ {aka ‘unsigned int[]’} [-Warray-bounds=] drivers/usb/host/oxu210hp-hcd.c:3978:30: warning: array subscript i is outside array bounds of ‘u32[0]’ {aka ‘unsigned int[]’} [-Warray-bounds=] drivers/usb/host/oxu210hp-hcd.c:3523:30: warning: array subscript i is outside array bounds of ‘u32[0]’ {aka ‘unsigned int[]’} [-Warray-bounds=] drivers/usb/host/oxu210hp-hcd.c:2774:39: warning: array subscript port is outside array bounds of ‘u32[0]’ {aka ‘unsigned int[]’} [-Warray-bounds=] drivers/usb/host/oxu210hp-hcd.c:3569:35: warning: array subscript <unknown> is outside array bounds of ‘u32[0]’ {aka ‘unsigned int[]’} [-Warray-bounds=] drivers/usb/host/oxu210hp-hcd.c:3888:36: warning: array subscript port is outside array bounds of ‘u32[0]’ {aka ‘unsigned int[]’} [-Warray-bounds=] drivers/usb/host/oxu210hp-hcd.c:2911:45: warning: array subscript i is outside array bounds of ‘u32[0]’ {aka ‘unsigned int[]’} [-Warray-bounds=] This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines on memcpy() and help us make progress towards globally enabling -fstrict-flex-arrays=3 [1]. Link: https://github.com/KSPP/linux/issues/21 Link: https://github.com/KSPP/linux/issues/259 Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1] Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/r/Y/gynI9Wv8RZTD8M@work Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-09usb: host: xhci-tegra: Drop using of_irq_parse_one()Rob Herring1-10/+7
Drivers generally shouldn't be using of_irq_parse_one() directly as it is a low-level interrupt parsing API. The exceptions are cases that need the values from the 'interrupts' property. This is not the case for Tegra XHCI driver as it just uses of_irq_parse_one() to test for 'interrupts' being absent or invalid. Instead, just make the interrupt optional on any error other than deferred probe. The exact reason for failing to get the interrupt is not that important. Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230228235322.13289-1-robh@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-05Linux 6.3-rc1v6.3-rc1Linus Torvalds1-2/+2
2023-03-05cpumask: re-introduce constant-sized cpumask optimizationsLinus Torvalds4-72/+72
Commit aa47a7c215e7 ("lib/cpumask: deprecate nr_cpumask_bits") resulted in the cpumask operations potentially becoming hugely less efficient, because suddenly the cpumask was always considered to be variable-sized. The optimization was then later added back in a limited form by commit 6f9c07be9d02 ("lib/cpumask: add FORCE_NR_CPUS config option"), but that FORCE_NR_CPUS option is not useful in a generic kernel and more of a special case for embedded situations with fixed hardware. Instead, just re-introduce the optimization, with some changes. Instead of depending on CPUMASK_OFFSTACK being false, and then always using the full constant cpumask width, this introduces three different cpumask "sizes": - the exact size (nr_cpumask_bits) remains identical to nr_cpu_ids. This is used for situations where we should use the exact size. - the "small" size (small_cpumask_bits) is the NR_CPUS constant if it fits in a single word and the bitmap operations thus end up able to trigger the "small_const_nbits()" optimizations. This is used for the operations that have optimized single-word cases that get inlined, notably the bit find and scanning functions. - the "large" size (large_cpumask_bits) is the NR_CPUS constant if it is an sufficiently small constant that makes simple "copy" and "clear" operations more efficient. This is arbitrarily set at four words or less. As a an example of this situation, without this fixed size optimization, cpumask_clear() will generate code like movl nr_cpu_ids(%rip), %edx addq $63, %rdx shrq $3, %rdx andl $-8, %edx callq memset@PLT on x86-64, because it would calculate the "exact" number of longwords that need to be cleared. In contrast, with this patch, using a MAX_CPU of 64 (which is quite a reasonable value to use), the above becomes a single movq $0,cpumask instruction instead, because instead of caring to figure out exactly how many CPU's the system has, it just knows that the cpumask will be a single word and can just clear it all. Note that this does end up tightening the rules a bit from the original version in another way: operations that set bits in the cpumask are now limited to the actual nr_cpu_ids limit, whereas we used to do the nr_cpumask_bits thing almost everywhere in the cpumask code. But if you just clear bits, or scan for bits, we can use the simpler compile-time constants. In the process, remove 'cpumask_complement()' and 'for_each_cpu_not()' which were not useful, and which fundamentally have to be limited to 'nr_cpu_ids'. Better remove them now than have somebody introduce use of them later. Of course, on x86-64 with MAXSMP there is no sane small compile-time constant for the cpumask sizes, and we end up using the actual CPU bits, and will generate the above kind of horrors regardless. Please don't use MAXSMP unless you really expect to have machines with thousands of cores. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-03-05Remove Intel compiler supportMasahiro Yamada11-287/+5
include/linux/compiler-intel.h had no update in the past 3 years. We often forget about the third C compiler to build the kernel. For example, commit a0a12c3ed057 ("asm goto: eradicate CC_HAS_ASM_GOTO") only mentioned GCC and Clang. init/Kconfig defines CC_IS_GCC and CC_IS_CLANG but not CC_IS_ICC, and nobody has reported any issue. I guess the Intel Compiler support is broken, and nobody is caring about it. Harald Arnesen pointed out ICC (classic Intel C/C++ compiler) is deprecated: $ icc -v icc: remark #10441: The Intel(R) C++ Compiler Classic (ICC) is deprecated and will be removed from product release in the second half of 2023. The Intel(R) oneAPI DPC++/C++ Compiler (ICX) is the recommended compiler moving forward. Please transition to use this compiler. Use '-diag-disable=10441' to disable this message. icc version 2021.7.0 (gcc version 12.1.0 compatibility) Arnd Bergmann provided a link to the article, "Intel C/C++ compilers complete adoption of LLVM". lib/zstd/common/compiler.h and lib/zstd/compress/zstd_fast.c were kept untouched for better sync with https://github.com/facebook/zstd Link: https://www.intel.com/content/www/us/en/developer/articles/technical/adoption-of-llvm-complete-icx.html Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-03-05Adding VFS co-maintainerAl Viro1-0/+1
Acked-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2023-03-04mm: avoid gcc complaint about pointer castingLinus Torvalds1-2/+8
The migration code ends up temporarily stashing information of the wrong type in unused fields of the newly allocated destination folio. That all works fine, but gcc does complain about the pointer type mis-use: mm/migrate.c: In function ‘__migrate_folio_extract’: mm/migrate.c:1050:20: note: randstruct: casting between randomized structure pointer types (ssa): ‘struct anon_vma’ and ‘struct address_space’ 1050 | *anon_vmap = (void *)dst->mapping; | ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~ and gcc is actually right to complain since it really doesn't understand that this is a very temporary special case where this is ok. This could be fixed in different ways by just obfuscating the assignment sufficiently that gcc doesn't see what is going on, but the truly "proper C" way to do this is by explicitly using a union. Using unions for type conversions like this is normally hugely ugly and syntactically nasty, but this really is one of the few cases where we want to make it clear that we're not doing type conversion, we're really re-using the value bit-for-bit just using another type. IOW, this should not become a common pattern, but in this one case using that odd union is probably the best way to document to the compiler what is conceptually going on here. [ Side note: there are valid cases where we convert pointers to other pointer types, notably the whole "folio vs page" situation, where the types actually have fundamental commonalities. The fact that the gcc note is limited to just randomized structures means that we don't see equivalent warnings for those cases, but it migth also mean that we miss other cases where we do play these kinds of dodgy games, and this kind of explicit conversion might be a good idea. ] I verified that at least for an allmodconfig build on x86-64, this generates the exact same code, apart from line numbers and assembler comment changes. Fixes: 64c8902ed441 ("migrate_pages: split unmap_and_move() to _unmap() and _move()") Cc: Huang, Ying <ying.huang@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-03-04umh: simplify the capability pointer logicLinus Torvalds1-13/+5
The usermodehelper code uses two fake pointers for the two capability cases: CAP_BSET for reading and writing 'usermodehelper_bset', and CAP_PI to read and write 'usermodehelper_inheritable'. This seems to be a completely unnecessary indirection, since we could instead just use the pointers themselves, and never have to do any "if this then that" kind of logic. So just get rid of the fake pointer values, and use the real pointer values instead. Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Kees Cook <keescook@chromium.org> Cc: Iurii Zaikin <yzaikin@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2023-03-03i2c: gxp: fix an error code in probeDan Carpenter1-1/+1
This is passing IS_ERR() instead of PTR_ERR() so instead of an error code it prints and returns the number 1. Fixes: 4a55ed6f89f5 ("i2c: Add GXP SoC I2C Controller") Signed-off-by: Dan Carpenter <error27@gmail.com> Reviewed-by: Nick Hawkins <nick.hawkins@hpe.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2023-03-03i2c: gxp: return proper error on address NACKWolfram Sang1-2/+4
According to Documentation/i2c/fault-codes.rst, NACK after sending an address should be -ENXIO. Signed-off-by: Wolfram Sang <wsa@kernel.org>
2023-03-03i2c: gxp: remove "empty" switch statementWolfram Sang1-12/+1
There used to be error messages which had to go. Now, it only consists of 'break's, so it can go. Signed-off-by: Wolfram Sang <wsa@kernel.org>
2023-03-03i2c: Disable I2C_APPLE when I2C_PASEMI is a builtinBenjamin Gray1-0/+1
The ppc64le_allmodconfig sets I2C_PASEMI=y and leaves COMPILE_TEST to default to y and I2C_APPLE to default to m, running into a known incompatible configuration that breaks the build [1]. Specifically, a common dependency (i2c-pasemi-core.o in this case) cannot be used by both builtin and module consumers. Disable I2C_APPLE when I2C_PASEMI is a builtin to prevent this. [1]: https://lore.kernel.org/all/202112061809.XT99aPrf-lkp@intel.com Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Sven Peter <sven@svenpeter.dev> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2023-03-03ALSA: ice1712: Delete unreachable code in aureon_add_controls()Dmitry Fomin1-4/+0
If the check (id != 0x41) fails, then id == 0x41 and the other check in 'else' branch also fails: id & 0x0F = 0b01000001 & 0b00001111 = 0b00000001. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Dmitry Fomin <fomindmitriyfoma@mail.ru> Link: https://lore.kernel.org/r/20230225184322.6286-2-fomindmitriyfoma@mail.ru Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-03-03ALSA: ice1712: Do not left ice->gpio_mutex locked in aureon_add_controls()Dmitry Fomin1-1/+1
If snd_ctl_add() fails in aureon_add_controls(), it immediately returns and leaves ice->gpio_mutex locked. ice->gpio_mutex locks in snd_ice1712_save_gpio_status and unlocks in snd_ice1712_restore_gpio_status(ice). It seems that the mutex is required only for aureon_cs8415_get(), so snd_ice1712_restore_gpio_status(ice) can be placed just after that. Compile tested only. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Dmitry Fomin <fomindmitriyfoma@mail.ru> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20230225184322.6286-1-fomindmitriyfoma@mail.ru Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-03-03ALSA: hda/realtek: Add quirk for HP EliteDesk 800 G6 Tower PCŁukasz Stelmach1-0/+1
HP EliteDesk 800 G6 Tower PC (103c:870c) requires a quirk for enabling headset-mic. Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com> Cc: <stable@vger.kernel.org> Link: https://bugzilla.kernel.org/show_bug.cgi?id=217008 Link: https://lore.kernel.org/r/20230223074749.1026060-1-l.stelmach@samsung.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-03-03ALSA: hda/realtek: Improve support for Dell Precision 3260Jaroslav Kysela1-0/+1
The headset jack works better with model=alc283-dac-wcaps. Without this option, the headset insertion (separate physical jack) may not be handled correctly (re-insertion is required). It seems that it follows the "Intel Reference Board" defaults. Reported-by: steven_wu2@dell.com Signed-off-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20230221102157.515852-1-perex@perex.cz Signed-off-by: Takashi Iwai <tiwai@suse.de>
2023-03-03ata: ahci: Revert "ata: ahci: Add Tiger Lake UP{3,4} AHCI controller"Damien Le Moal1-1/+0
Commit 104ff59af73a ("ata: ahci: Add Tiger Lake UP{3,4} AHCI controller") enabled low power mode for the Tiger Lake AHIC adapter in the author system but created regressions for others. Revert this patch for now until a better solution is found to make this adapter eco-friendly. Link: https://bugzilla.kernel.org/show_bug.cgi?id=217114 CC: stable@vger.kernel.org Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
2023-03-03mailmap: map Dikshita Agarwal's old address to his current oneKonrad Dybcio1-0/+1
Dikshita's old email is still picked up by the likes of get_maintainer.pl and keeps bouncing. Map it to his current one. Link: https://lkml.kernel.org/r/20230228153335.907164-2-konrad.dybcio@linaro.org Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org> Cc: Dikshita Agarwal <dikshita@qti.qualcomm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-03-03mailmap: map Vikash Garodia's old address to his current oneKonrad Dybcio1-0/+1
Vikash's old email is still picked up by the likes of get_maintainer.pl and keeps bouncing. Map it to his current one. Link: https://lkml.kernel.org/r/20230228153335.907164-3-konrad.dybcio@linaro.org Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org> Cc: Vikash Garodia <quic_vgarodia@quicinc.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-03-03fs/cramfs/inode.c: initialize file_ra_stateAndrew Morton1-1/+1
file_ra_state_init() assumes that the file_ra_state has been zeroed out. Fixes a KMSAN used-unintialized issue (at least). Fixes: cf948cbc35e80 ("cramfs: read_mapping_page() is synchronous") Reported-by: syzbot <syzbot+8ce7f8308d91e6b8bbe2@syzkaller.appspotmail.com> Link: https://lkml.kernel.org/r/0000000000008f74e905f56df987@google.com Cc: Matthew Wilcox <willy@infradead.org> Cc: Nicolas Pitre <nico@fluxnic.net> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-03-03fs: hfsplus: fix UAF issue in hfsplus_put_superDongliang Mu1-2/+2
The current hfsplus_put_super first calls hfs_btree_close on sbi->ext_tree, then invokes iput on sbi->hidden_dir, resulting in an use-after-free issue in hfsplus_release_folio. As shown in hfsplus_fill_super, the error handling code also calls iput before hfs_btree_close. To fix this error, we move all iput calls before hfsplus_btree_close. Note that this patch is tested on Syzbot. Link: https://lkml.kernel.org/r/20230226124948.3175736-1-mudongliangabcd@gmail.com Reported-by: syzbot+57e3e98f7e3b80f64d56@syzkaller.appspotmail.com Tested-by: Dongliang Mu <mudongliangabcd@gmail.com> Signed-off-by: Dongliang Mu <mudongliangabcd@gmail.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-03-03panic: fix the panic_print NMI backtrace settingGuilherme G. Piccoli1-18/+26
Commit 8d470a45d1a6 ("panic: add option to dump all CPUs backtraces in panic_print") introduced a setting for the "panic_print" kernel parameter to allow users to request a NMI backtrace on panic. Problem is that the panic_print handling happens after the secondary CPUs are already disabled, hence this option ended-up being kind of a no-op - kernel skips the NMI trace in idling CPUs, which is the case of offline CPUs. Fix it by checking the NMI backtrace bit in the panic_print prior to the CPU disabling function. Link: https://lkml.kernel.org/r/20230226160838.414257-1-gpiccoli@igalia.com Fixes: 8d470a45d1a6 ("panic: add option to dump all CPUs backtraces in panic_print") Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com> Cc: <stable@vger.kernel.org> Cc: Baoquan He <bhe@redhat.com> Cc: Dave Young <dyoung@redhat.com> Cc: Feng Tang <feng.tang@intel.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Cc: Kees Cook <keescook@chromium.org> Cc: Michael Kelley <mikelley@microsoft.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-03-03lib: parser: update documentation for match_NUMBER functionsEric Biggers1-7/+7
commit 67222c4ba8af ("lib: parser: optimize match_NUMBER apis to use local array") removed -ENOMEM as a possible return value, so update the comments accordingly. Link: https://lkml.kernel.org/r/20230224042618.9092-1-ebiggers@kernel.org Fixes: 67222c4ba8af ("lib: parser: optimize match_NUMBER apis to use local array") Signed-off-by: Eric Biggers <ebiggers@google.com> Cc: Li Lingfeng <lilingfeng3@huawei.com> Cc: Tejun Heo <tj@kernel.org> Cc: Yu Kuai <yukuai1@huaweicloud.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-03-03kasan, x86: don't rename memintrinsics in uninstrumented filesMarco Elver1-19/+0
Now that memcpy/memset/memmove are no longer overridden by KASAN, we can just use the normal symbol names in uninstrumented files. Drop the preprocessor redefinitions. Link: https://lkml.kernel.org/r/20230224085942.1791837-4-elver@google.com Fixes: 69d4c0d32186 ("entry, kasan, x86: Disallow overriding mem*() functions") Signed-off-by: Marco Elver <elver@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jakub Jelinek <jakub@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linux Kernel Functional Testing <lkft@linaro.org> Cc: Naresh Kamboju <naresh.kamboju@linaro.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Nicolas Schier <nicolas@fjasle.eu> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-03-03kasan: test: fix test for new meminstrinsic instrumentationMarco Elver2-1/+37
The tests for memset/memmove have been failing since they haven't been instrumented in 69d4c0d32186. Fix the test to recognize when memintrinsics aren't instrumented, and skip test cases accordingly. We also need to conditionally pass -fno-builtin to the test, otherwise the instrumentation pass won't recognize memintrinsics and end up not instrumenting them either. Link: https://lkml.kernel.org/r/20230224085942.1791837-3-elver@google.com Fixes: 69d4c0d32186 ("entry, kasan, x86: Disallow overriding mem*() functions") Reported-by: Linux Kernel Functional Testing <lkft@linaro.org> Signed-off-by: Marco Elver <elver@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Tested-by: Linux Kernel Functional Testing <lkft@linaro.org> Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jakub Jelinek <jakub@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Nicolas Schier <nicolas@fjasle.eu> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-03-03kasan: treat meminstrinsic as builtins in uninstrumented filesMarco Elver3-1/+22
Where the compiler instruments meminstrinsics by generating calls to __asan/__hwasan_ prefixed functions, let the compiler consider memintrinsics as builtin again. To do so, never override memset/memmove/memcpy if the compiler does the correct instrumentation - even on !GENERIC_ENTRY architectures. [elver@google.com: powerpc: don't rename memintrinsics if compiler adds prefixes] Link: https://lore.kernel.org/all/20230224085942.1791837-1-elver@google.com/ [1] Link: https://lkml.kernel.org/r/20230227094726.3833247-1-elver@google.com Link: https://lkml.kernel.org/r/20230224085942.1791837-2-elver@google.com Fixes: 69d4c0d32186 ("entry, kasan, x86: Disallow overriding mem*() functions") Signed-off-by: Marco Elver <elver@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Tested-by: Linux Kernel Functional Testing <lkft@linaro.org> Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jakub Jelinek <jakub@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Nicolas Schier <nicolas@fjasle.eu> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-03-03kasan: emit different calls for instrumentable memintrinsicsMarco Elver3-0/+23
Clang 15 provides an option to prefix memcpy/memset/memmove calls with __asan_/__hwasan_ in instrumented functions: https://reviews.llvm.org/D122724 GCC will add support in future: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108777 Use it to regain KASAN instrumentation of memcpy/memset/memmove on architectures that require noinstr to be really free from instrumented mem*() functions (all GENERIC_ENTRY architectures). Link: https://lkml.kernel.org/r/20230224085942.1791837-1-elver@google.com Fixes: 69d4c0d32186 ("entry, kasan, x86: Disallow overriding mem*() functions") Signed-off-by: Marco Elver <elver@google.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Tested-by: Linux Kernel Functional Testing <lkft@linaro.org> Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jakub Jelinek <jakub@redhat.com> Cc: kasan-dev@googlegroups.com Cc: Kees Cook <keescook@chromium.org> Cc: Linux Kernel Functional Testing <lkft@linaro.org> Cc: Nathan Chancellor <nathan@kernel.org> # build only Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Nicolas Schier <nicolas@fjasle.eu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-03-03blk-mq: enforce op-specific segment limits in blk_insert_cloned_requestUday Shankar3-10/+11
The block layer might merge together discard requests up until the max_discard_segments limit is hit, but blk_insert_cloned_request checks the segment count against max_segments regardless of the req op. This can result in errors like the following when discards are issued through a DM device and max_discard_segments exceeds max_segments for the queue of the chosen underlying device. blk_insert_cloned_request: over max segments limit. (256 > 129) Fix this by looking at the req_op and enforcing the appropriate segment limit - max_discard_segments for REQ_OP_DISCARDs and max_segments for everything else. Signed-off-by: Uday Shankar <ushankar@purestorage.com> Reviewed-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20230301000655.48112-1-ushankar@purestorage.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2023-03-02rust: bindgen: Add `alt_instr` as opaque typeArnaldo Carvalho de Melo1-0/+1
To address this build error: BINDGEN rust/bindings/bindings_generated.rs BINDGEN rust/bindings/bindings_helpers_generated.rs EXPORTS rust/exports_core_generated.h RUSTC P rust/libmacros.so RUSTC L rust/compiler_builtins.o RUSTC L rust/alloc.o RUSTC L rust/bindings.o RUSTC L rust/build_error.o EXPORTS rust/exports_alloc_generated.h error[E0588]: packed type cannot transitively contain a `#[repr(align)]` type --> /var/home/acme/git/linux/rust/bindings/bindings_generated.rs:10094:1 | 10094 | / pub struct alt_instr { 10095 | | pub instr_offset: s32, 10096 | | pub repl_offset: s32, 10097 | | pub __bindgen_anon_1: alt_instr__bindgen_ty_1, 10098 | | pub instrlen: u8_, 10099 | | pub replacementlen: u8_, 10100 | | } | |_^ | note: `alt_instr__bindgen_ty_1__bindgen_ty_1` has a `#[repr(align)]` attribute --> /var/home/acme/git/linux/rust/bindings/bindings_generated.rs:10111:1 | 10111 | / pub struct alt_instr__bindgen_ty_1__bindgen_ty_1 { 10112 | | pub _bitfield_1: __BindgenBitfieldUnit<[u8; 4usize], u16>, 10113 | | } | |_^ note: `alt_instr` contains a field of type `alt_instr__bindgen_ty_1` --> /var/home/acme/git/linux/rust/bindings/bindings_generated.rs:10097:9 | 10097 | pub __bindgen_anon_1: alt_instr__bindgen_ty_1, | ^^^^^^^^^^^^^^^^ note: ...which contains a field of type `alt_instr__bindgen_ty_1__bindgen_ty_1` --> /var/home/acme/git/linux/rust/bindings/bindings_generated.rs:10104:9 | 10104 | pub __bindgen_anon_1: alt_instr__bindgen_ty_1__bindgen_ty_1, | ^^^^^^^^^^^^^^^^ error: aborting due to previous error For more information about this error, try `rustc --explain E0588`. make[1]: *** [rust/Makefile:389: rust/bindings.o] Error 1 make: *** [Makefile:1293: prepare] Error 2 Cc: Derek Barbosa <debarbos@redhat.com> Cc: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Fixes: 5d1dd961e743 ("x86/alternatives: Add alt_instr.flags") Reported-by: kernel test robot <lkp@intel.com> Reported-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com> Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com> Reviewed-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2023-03-02openrisc: fix livelock in uaccessAl Viro1-1/+4
openrisc equivalent of 26178ec11ef3 "x86: mm: consolidate VM_FAULT_RETRY handling" If e.g. get_user() triggers a page fault and a fatal signal is caught, we might end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything to page tables. In such case we must *not* return to the faulting insn - that would repeat the entire thing without making any progress; what we need instead is to treat that as failed (user) memory access. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2023-03-02nios2: fix livelock in uaccessAl Viro1-1/+4
nios2 equivalent of 26178ec11ef3 "x86: mm: consolidate VM_FAULT_RETRY handling" If e.g. get_user() triggers a page fault and a fatal signal is caught, we might end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything to page tables. In such case we must *not* return to the faulting insn - that would repeat the entire thing without making any progress; what we need instead is to treat that as failed (user) memory access. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2023-03-02microblaze: fix livelock in uaccessAl Viro1-1/+4
microblaze equivalent of 26178ec11ef3 "x86: mm: consolidate VM_FAULT_RETRY handling" If e.g. get_user() triggers a page fault and a fatal signal is caught, we might end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything to page tables. In such case we must *not* return to the faulting insn - that would repeat the entire thing without making any progress; what we need instead is to treat that as failed (user) memory access. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2023-03-02ia64: fix livelock in uaccessAl Viro1-1/+4
ia64 equivalent of 26178ec11ef3 "x86: mm: consolidate VM_FAULT_RETRY handling" If e.g. get_user() triggers a page fault and a fatal signal is caught, we might end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything to page tables. In such case we must *not* return to the faulting insn - that would repeat the entire thing without making any progress; what we need instead is to treat that as failed (user) memory access. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2023-03-02sparc: fix livelock in uaccessAl Viro2-2/+10
sparc equivalent of 26178ec11ef3 "x86: mm: consolidate VM_FAULT_RETRY handling" If e.g. get_user() triggers a page fault and a fatal signal is caught, we might end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything to page tables. In such case we must *not* return to the faulting insn - that would repeat the entire thing without making any progress; what we need instead is to treat that as failed (user) memory access. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2023-03-02alpha: fix livelock in uaccessAl Viro1-1/+4
alpha equivalent of 26178ec11ef3 "x86: mm: consolidate VM_FAULT_RETRY handling" If e.g. get_user() triggers a page fault and a fatal signal is caught, we might end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything to page tables. In such case we must *not* return to the faulting insn - that would repeat the entire thing without making any progress; what we need instead is to treat that as failed (user) memory access. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2023-03-02parisc: fix livelock in uaccessAl Viro1-1/+6
parisc equivalent of 26178ec11ef3 "x86: mm: consolidate VM_FAULT_RETRY handling" If e.g. get_user() triggers a page fault and a fatal signal is caught, we might end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything to page tables. In such case we must *not* return to the faulting insn - that would repeat the entire thing without making any progress; what we need instead is to treat that as failed (user) memory access. Tested-by: Helge Deller <deller@gmx.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2023-03-02hexagon: fix livelock in uaccessAl Viro1-1/+4
hexagon equivalent of 26178ec11ef3 "x86: mm: consolidate VM_FAULT_RETRY handling" If e.g. get_user() triggers a page fault and a fatal signal is caught, we might end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything to page tables. In such case we must *not* return to the faulting insn - that would repeat the entire thing without making any progress; what we need instead is to treat that as failed (user) memory access. Acked-by: Brian Cain <bcain@quicinc.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2023-03-02riscv: fix livelock in uaccessAl Viro1-1/+4
riscv equivalent of 26178ec11ef3 "x86: mm: consolidate VM_FAULT_RETRY handling" If e.g. get_user() triggers a page fault and a fatal signal is caught, we might end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything to page tables. In such case we must *not* return to the faulting insn - that would repeat the entire thing without making any progress; what we need instead is to treat that as failed (user) memory access. Tested-by: Björn Töpel <bjorn@kernel.org> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2023-03-02m68k: fix livelock in uaccessAl Viro1-1/+4
m68k equivalent of 26178ec11ef3 "x86: mm: consolidate VM_FAULT_RETRY handling" If e.g. get_user() triggers a page fault and a fatal signal is caught, we might end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything to page tables. In such case we must *not* return to the faulting insn - that would repeat the entire thing without making any progress; what we need instead is to treat that as failed (user) memory access. Tested-by: Finn Thain <fthain@linux-m68k.org> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2023-03-02genirq/msi, platform-msi: Ensure that MSI descriptors are unreferencedThomas Gleixner3-1/+25
Miquel reported a warning in the MSI core which is triggered when interrupts are freed via platform_msi_device_domain_free(). This code got reworked to use core functions for freeing the MSI descriptors, but nothing took care to clear the msi_desc->irq entry, which then triggers the warning in msi_free_msi_desc() which uses desc->irq to validate that the descriptor has been torn down. The same issue exists in msi_domain_populate_irqs(). Up to the point that msi_free_msi_descs() grew a warning for this case, this went un-noticed. Provide the counterpart of msi_domain_populate_irqs() and invoke it in platform_msi_device_domain_free() before freeing the interrupts and MSI descriptors and also in the error path of msi_domain_populate_irqs(). Fixes: 2f2940d16823 ("genirq/msi: Remove filter from msi_free_descs_free_range()") Reported-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Miquel Raynal <miquel.raynal@bootlin.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/87mt4wkwnv.ffs@tglx
2023-03-02s390/kprobes: fix current_kprobe never cleared after kprobes reenterVasily Gorbik1-0/+1
Recent test_kprobe_missed kprobes kunit test uncovers the following problem. Once kprobe is triggered from another kprobe (kprobe reenter), all future kprobes on this cpu are considered as kprobe reenter, thus pre_handler and post_handler are not being called and kprobes are counted as "missed". Commit b9599798f953 ("[S390] kprobes: activation and deactivation") introduced a simpler scheme for kprobes (de)activation and status tracking by using push_kprobe/pop_kprobe, which supposed to work for both initial kprobe entry as well as kprobe reentry and helps to avoid handling those two cases differently. The problem is that a sequence of calls in case of kprobes reenter: push_kprobe() <- NULL (current_kprobe) push_kprobe() <- kprobe1 (current_kprobe) pop_kprobe() -> kprobe1 (current_kprobe) pop_kprobe() -> kprobe1 (current_kprobe) leaves "kprobe1" as "current_kprobe" on this cpu, instead of setting it to NULL. In fact push_kprobe/pop_kprobe can only store a single state (there is just one prev_kprobe in kprobe_ctlblk). Which is a hack but sufficient, there is no need to have another prev_kprobe just to store NULL. To make a simple and backportable fix simply reset "prev_kprobe" when kprobe is poped from this "stack". No need to worry about "kprobe_status" in this case, because its value is only checked when current_kprobe != NULL. Cc: stable@vger.kernel.org Fixes: b9599798f953 ("[S390] kprobes: activation and deactivation") Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-03-02s390/kprobes: fix irq mask clobbering on kprobe reenter from post_handlerVasily Gorbik1-2/+1
Recent test_kprobe_missed kprobes kunit test uncovers the following error (reported when CONFIG_DEBUG_ATOMIC_SLEEP is enabled): BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 662, name: kunit_try_catch preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 no locks held by kunit_try_catch/662. irq event stamp: 280 hardirqs last enabled at (279): [<00000003e60a3d42>] __do_pgm_check+0x17a/0x1c0 hardirqs last disabled at (280): [<00000003e3bd774a>] kprobe_exceptions_notify+0x27a/0x318 softirqs last enabled at (0): [<00000003e3c5c890>] copy_process+0x14a8/0x4c80 softirqs last disabled at (0): [<0000000000000000>] 0x0 CPU: 46 PID: 662 Comm: kunit_try_catch Tainted: G N 6.2.0-173644-g44c18d77f0c0 #2 Hardware name: IBM 3931 A01 704 (LPAR) Call Trace: [<00000003e60a3a00>] dump_stack_lvl+0x120/0x198 [<00000003e3d02e82>] __might_resched+0x60a/0x668 [<00000003e60b9908>] __mutex_lock+0xc0/0x14e0 [<00000003e60bad5a>] mutex_lock_nested+0x32/0x40 [<00000003e3f7b460>] unregister_kprobe+0x30/0xd8 [<00000003e51b2602>] test_kprobe_missed+0xf2/0x268 [<00000003e51b5406>] kunit_try_run_case+0x10e/0x290 [<00000003e51b7dfa>] kunit_generic_run_threadfn_adapter+0x62/0xb8 [<00000003e3ce30f8>] kthread+0x2d0/0x398 [<00000003e3b96afa>] __ret_from_fork+0x8a/0xe8 [<00000003e60ccada>] ret_from_fork+0xa/0x40 The reason for this error report is that kprobes handling code failed to restore irqs. The problem is that when kprobe is triggered from another kprobe post_handler current sequence of enable_singlestep / disable_singlestep is the following: enable_singlestep <- original kprobe (saves kprobe_saved_imask) enable_singlestep <- kprobe triggered from post_handler (clobbers kprobe_saved_imask) disable_singlestep <- kprobe triggered from post_handler (restores kprobe_saved_imask) disable_singlestep <- original kprobe (restores wrong clobbered kprobe_saved_imask) There is just one kprobe_ctlblk per cpu and both calls saves and loads irq mask to kprobe_saved_imask. To fix the problem simply move resume_execution (which calls disable_singlestep) before calling post_handler. This also fixes the problem that post_handler is called with pt_regs which were not yet adjusted after single-stepping. Cc: stable@vger.kernel.org Fixes: 4ba069b802c2 ("[S390] add kprobes support.") Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2023-03-02watchdog: at91rm9200: Only warn once about problems in .remove()Uwe Kleine-König1-1/+1
The single difference between returning 0 and returning an error code in a platform remove callback is that in the latter case the platform core emits a warning about the error being ignored. at91wdt_remove() already emits a warning in the error case, so suppress the more generic (and less helpful) one by returning 0. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20230217095317.1213387-1-u.kleine-koenig@pengutronix.de Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2023-03-02watchdog: mt7621-wdt: avoid ralink architecture dependent codeSergio Paracuellos2-6/+20
MT7621 SoC has a system controller node. Watchdog need to access to reset status register. Ralink architecture and related driver are old and from the beggining they are using some architecture dependent operations for accessing this shared registers through 'asm/mach-ralink/ralink_regs.h' header file. However this is not ideal from a driver perspective which can just access to the system controller registers in an arch independent way using regmap syscon APIs. Update Kconfig accordingly to select new added dependencies and allow driver to be compile tested. Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20230214103936.1061078-6-sergio.paracuellos@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>