x86: Fix non-lazy GS handling in sys_vm86()

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This fixes a stack corruption panic or null dereference oops
due to a bad GS in resume_userspace() when returning from
sys_vm86() and calling lockdep_sys_exit().

Only a problem when CONFIG_LOCKDEP and CONFIG_CC_STACKPROTECTOR
enabled.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Cc: H. Peter Anvin <hpa@zytor.com>
LKML-Reference: <1244384628.2323.4.camel@bimbo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Lubomir Rintel 2009-06-07 16:23:48 +02:00 • committed by Ingo Molnar

parent 4a4aca641b

commit 3aa6b186f8

1 changed files with 5 additions and 4 deletions

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arch/x86/kernel/vm86_32.c

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