x86-32, espfix: Remove filter for espfix32 due to race

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It is not safe to use LAR to filter when to go down the espfix path,
because the LDT is per-process (rather than per-thread) and another
thread might change the descriptors behind our back.  Fortunately it
is always *safe* (if a bit slow) to go down the espfix path, and a
32-bit LDT stack segment is extremely rare.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/r/1398816946-3351-1-git-send-email-hpa@linux.intel.com
Cc: <stable@vger.kernel.org> # consider after upstream merge

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H. Peter Anvin 2014-04-30 14:03:25 -07:00

parent 3891a04aaf

commit 246f2d2ee1

1 changed files with 0 additions and 5 deletions

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arch/x86/kernel/entry_32.S

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