powerpc/mm: Don't log user reads to 0xffffffff

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[ Upstream commit 0f9aee0cb9 ]

Running vdsotest leaves many times the following log:

  [   79.629901] vdsotest[396]: User access of kernel address (ffffffff) - exploit attempt? (uid: 0)

A pointer set to (-1) is likely a programming error similar to
a NULL pointer and is not worth logging as an exploit attempt.

Don't log user accesses to 0xffffffff.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/0728849e826ba16f1fbd6fa7f5c6cc87bd64e097.1577087627.git.christophe.leroy@c-s.fr
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Christophe Leroy 2019-12-23 07:54:22 +00:00 • committed by Greg Kroah-Hartman

parent 1bdfa5900f

commit cae5e66dde

1 changed files with 3 additions and 0 deletions

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arch/powerpc/mm/fault.c

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