diff options
| author | Andy Lutomirski <luto@kernel.org> | 2015-03-23 12:32:54 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-03-24 21:08:28 +0100 |
| commit | b3494a4ab20f6bdf74cdf2badf7918bb65ee8a00 (patch) | |
| tree | 2875f99133dd8b019b6aee8d0e81c79428630748 /arch/x86/kvm/ioapic.c | |
| parent | bc465aa9d045feb0e13b4a8f32cc33c1943f62d6 (diff) | |
x86/asm/entry: Check for syscall exit work with IRQs disabled
We currently have a race: if we're preempted during syscall
exit, we can fail to process syscall return work that is queued
up while we're preempted in ret_from_sys_call after checking
ti.flags.
Fix it by disabling interrupts before checking ti.flags.
Reported-by: Stefan Seyfried <stefan.seyfried@googlemail.com>
Reported-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Tejun Heo <tj@kernel.org>
Fixes: 96b6352c1271 ("x86_64, entry: Remove the syscall exit audit")
Link: http://lkml.kernel.org/r/189320d42b4d671df78c10555976bb10af1ffc75.1427137498.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kvm/ioapic.c')
0 files changed, 0 insertions, 0 deletions