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daa559570d
Every other architecture in Linux includes the line "Call trace:" before backtraces. In some cases ARM would print "Backtrace:", but this was only via 1 specific call path, and wasn't included in CPU Oops nor things like KASAN, UBSAN, etc that called dump_stack(). Regularize this line so CI systems and other things (like LKDTM) that depend on parsing "Call trace:" out of dmesg will see it for ARM. Before this patch: UBSAN: array-index-out-of-bounds in ../drivers/misc/lkdtm/bugs.c:376:16 index 8 is out of range for type 'char [8]' CPU: 0 PID: 1402 Comm: cat Not tainted 6.7.0-rc2 #1 Hardware name: Generic DT based system dump_backtrace from show_stack+0x20/0x24 r7:00000042 r6:00000000 r5:60070013 r4:80cf5d7c show_stack from dump_stack_lvl+0x88/0x98 dump_stack_lvl from dump_stack+0x18/0x1c r7:00000042 r6:00000008 r5:00000008 r4:80fab118 dump_stack from ubsan_epilogue+0x10/0x3c ubsan_epilogue from __ubsan_handle_out_of_bounds+0x80/0x84 ... After this patch: UBSAN: array-index-out-of-bounds in ../drivers/misc/lkdtm/bugs.c:376:16 index 8 is out of range for type 'char [8]' CPU: 0 PID: 1402 Comm: cat Not tainted 6.7.0-rc2 #1 Hardware name: Generic DT based system Call trace: dump_backtrace from show_stack+0x20/0x24 r7:00000042 r6:00000000 r5:60070013 r4:80cf5d7c show_stack from dump_stack_lvl+0x88/0x98 dump_stack_lvl from dump_stack+0x18/0x1c r7:00000042 r6:00000008 r5:00000008 r4:80fab118 dump_stack from ubsan_epilogue+0x10/0x3c ubsan_epilogue from __ubsan_handle_out_of_bounds+0x80/0x84 ... Link: https://lore.kernel.org/r/20240110215554.work.460-kees@kernel.org Reported-by: Mark Brown <broonie@kernel.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Vladimir Murzin <vladimir.murzin@arm.com> Cc: Zhen Lei <thunder.leizhen@huawei.com> Cc: Keith Packard <keithpac@amazon.com> Cc: Haibo Li <haibo.li@mediatek.com> Cc: <linux-arm-kernel@lists.infradead.org> Reviewed-by: Mark Brown <broonie@kernel.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.