pstore: Do not use crash buffer for decompression

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The pre-allocated compression buffer used for crash dumping was also
being used for decompression. This isn't technically safe, since it's
possible the kernel may attempt a crashdump while pstore is populating the
pstore filesystem (and performing decompression). Instead, just allocate
a separate buffer for decompression. Correctness is preferred over
performance here.

Signed-off-by: Kees Cook <keescook@chromium.org>

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This commit is contained in:

Kees Cook 2018-10-26 01:17:07 -07:00

parent 971f66d8a7

commit bdabc8e71c

1 changed files with 25 additions and 31 deletions

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56

fs/pstore/platform.c

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