diff options
| author | Andi Kleen <ak@suse.de> | 2006-09-26 10:52:41 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-09-26 10:52:41 +0200 |
| commit | 658fdbef66e5e9be79b457edc2cbbb3add840aa9 (patch) | |
| tree | 931fa9bac154671ab96762fee73b3641b1191bb8 /arch/x86_64/kernel/setup64.c | |
| parent | adf1423698f00d00b267f7dca8231340ce7d65ef (diff) | |
[PATCH] Don't leak NT bit into next task
SYSENTER can cause a NT to be set which might cause crashes on the IRET
in the next task.
Following similar i386 patch from Linus.
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/x86_64/kernel/setup64.c')
| -rw-r--r-- | arch/x86_64/kernel/setup64.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/setup64.c b/arch/x86_64/kernel/setup64.c index 9332d2361e0..8c4b80fe71a 100644 --- a/arch/x86_64/kernel/setup64.c +++ b/arch/x86_64/kernel/setup64.c @@ -180,6 +180,8 @@ void __cpuinit check_efer(void) } } +unsigned long kernel_eflags; + /* * cpu_init() initializes state that is per-CPU. Some data is already * initialized (naturally) in the bootstrap process, such as the GDT @@ -281,4 +283,6 @@ void __cpuinit cpu_init (void) set_debugreg(0UL, 7); fpu_init(); + + raw_local_save_flags(kernel_eflags); } |