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panic: Expose "warn_count" to sysfs

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commit 8b05aa26336113c4cea25f1c333ee8cd4fc212a6 upstream.

Since Warn count is now tracked and is a fairly interesting signal, add
the entry /sys/kernel/warn_count to expose it to userspace.

Cc: Petr Mladek <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: tangmeng <[email protected]>
Cc: "Guilherme G. Piccoli" <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: Tiezhu Yang <[email protected]>
Reviewed-by: Luis Chamberlain <[email protected]>
Signed-off-by: Kees Cook <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Eric Biggers <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Kees Cook 2023-02-01 20:42:53 -08:00 • committed by Greg Kroah-Hartman
commit 6f18d28c26
2 changed files with 26 additions and 2 deletions
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6
Documentation/ABI/testing/sysfs-kernel-warn_count Normal file
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@ -0,0 +1,6 @@
What: /sys/kernel/oops_count
Date: November 2022
KernelVersion: 6.2.0
Contact: Linux Kernel Hardening List <[email protected]>
Description:
Shows how many times the system has Warned since last boot.