uprobes/x86: Emulate relative conditional "short" jmp's

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Teach branch_emulate_op() to emulate the conditional "short" jmp's which
check regs->flags.

Note: this doesn't support jcxz/jcexz, loope/loopz, and loopne/loopnz.
They all are rel8 and thus they can't trigger the problem, but perhaps
we will add the support in future just for completeness.

Reported-by: Jonathan Lebon <jlebon@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Jim Keniston <jkenisto@us.ibm.com>

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Oleg Nesterov 2014-04-06 21:53:47 +02:00

parent 8e89c0be17

commit 8f95505bc1

1 changed files with 55 additions and 2 deletions

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arch/x86/kernel/uprobes.c

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