s390/kprobes: add sanity check

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Check whether the specified address points to the start of an
instruction to prevent users from setting a kprobe in the mid of
an instruction which would crash the kernel.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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Sven Schnelle 2021-09-06 11:25:38 +02:00 • committed by Vasily Gorbik

parent b860b9346e

commit 4df898dc06

1 changed files with 47 additions and 1 deletions

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arch/s390/kernel/kprobes.c

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