taint: consolidate documentation
This consolidates the taint bit documentation into a single place with both numeric and letter values. Additionally adds the missing TAINT_AUX documentation. Link: http://lkml.kernel.org/r/1519084390-43867-3-git-send-email-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -964,32 +964,33 @@ detect a hard lockup condition.
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tainted:
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Non-zero if the kernel has been tainted. Numeric values, which
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can be ORed together:
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Non-zero if the kernel has been tainted. Numeric values, which can be
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ORed together. The letters are seen in "Tainted" line of Oops reports.
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1 - A module with a non-GPL license has been loaded, this
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includes modules with no license.
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Set by modutils >= 2.4.9 and module-init-tools.
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2 - A module was force loaded by insmod -f.
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Set by modutils >= 2.4.9 and module-init-tools.
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4 - Unsafe SMP processors: SMP with CPUs not designed for SMP.
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8 - A module was forcibly unloaded from the system by rmmod -f.
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16 - A hardware machine check error occurred on the system.
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32 - A bad page was discovered on the system.
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64 - The user has asked that the system be marked "tainted". This
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could be because they are running software that directly modifies
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the hardware, or for other reasons.
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128 - The system has died.
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256 - The ACPI DSDT has been overridden with one supplied by the user
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instead of using the one provided by the hardware.
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512 - A kernel warning has occurred.
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1024 - A module from drivers/staging was loaded.
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2048 - The system is working around a severe firmware bug.
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4096 - An out-of-tree module has been loaded.
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8192 - An unsigned module has been loaded in a kernel supporting module
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signature.
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16384 - A soft lockup has previously occurred on the system.
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32768 - The kernel has been live patched.
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1 (P): A module with a non-GPL license has been loaded, this
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includes modules with no license.
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Set by modutils >= 2.4.9 and module-init-tools.
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2 (F): A module was force loaded by insmod -f.
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Set by modutils >= 2.4.9 and module-init-tools.
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4 (S): Unsafe SMP processors: SMP with CPUs not designed for SMP.
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8 (R): A module was forcibly unloaded from the system by rmmod -f.
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16 (M): A hardware machine check error occurred on the system.
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32 (B): A bad page was discovered on the system.
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64 (U): The user has asked that the system be marked "tainted". This
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could be because they are running software that directly modifies
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the hardware, or for other reasons.
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128 (D): The system has died.
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256 (A): The ACPI DSDT has been overridden with one supplied by the user
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instead of using the one provided by the hardware.
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512 (W): A kernel warning has occurred.
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1024 (C): A module from drivers/staging was loaded.
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2048 (I): The system is working around a severe firmware bug.
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4096 (O): An out-of-tree module has been loaded.
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8192 (E): An unsigned module has been loaded in a kernel supporting module
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signature.
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16384 (L): A soft lockup has previously occurred on the system.
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32768 (K): The kernel has been live patched.
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65536 (X): Auxiliary taint, defined and used by for distros.
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==============================================================
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@ -328,27 +328,12 @@ const struct taint_flag taint_flags[TAINT_FLAGS_COUNT] = {
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};
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/**
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* print_tainted - return a string to represent the kernel taint state.
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* print_tainted - return a string to represent the kernel taint state.
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*
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* 'P' - Proprietary module has been loaded.
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* 'F' - Module has been forcibly loaded.
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* 'S' - SMP with CPUs not designed for SMP.
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* 'R' - User forced a module unload.
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* 'M' - System experienced a machine check exception.
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* 'B' - System has hit bad_page.
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* 'U' - Userspace-defined naughtiness.
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* 'D' - Kernel has oopsed before
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* 'A' - ACPI table overridden.
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* 'W' - Taint on warning.
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* 'C' - modules from drivers/staging are loaded.
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* 'I' - Working around severe firmware bug.
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* 'O' - Out-of-tree module has been loaded.
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* 'E' - Unsigned module has been loaded.
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* 'L' - A soft lockup has previously occurred.
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* 'K' - Kernel has been live patched.
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* 'X' - Auxiliary taint, for distros' use.
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* For individual taint flag meanings, see Documentation/sysctl/kernel.txt
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*
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* The string is overwritten by the next call to print_tainted().
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* The string is overwritten by the next call to print_tainted(),
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* but is always NULL terminated.
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*/
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const char *print_tainted(void)
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{
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