diff options
author | Andi Kleen <ak@suse.de> | 2006-09-26 04:52:41 -0400 |
---|---|---|
committer | Andi Kleen <andi@basil.nowhere.org> | 2006-09-26 04:52:41 -0400 |
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 9332d2361e08..8c4b80fe71a1 100644 --- a/arch/x86_64/kernel/setup64.c +++ b/arch/x86_64/kernel/setup64.c | |||
@@ -180,6 +180,8 @@ void __cpuinit check_efer(void) | |||
180 | } | 180 | } |
181 | } | 181 | } |
182 | 182 | ||
183 | unsigned long kernel_eflags; | ||
184 | |||
183 | /* | 185 | /* |
184 | * cpu_init() initializes state that is per-CPU. Some data is already | 186 | * cpu_init() initializes state that is per-CPU. Some data is already |
185 | * initialized (naturally) in the bootstrap process, such as the GDT | 187 | * initialized (naturally) in the bootstrap process, such as the GDT |
@@ -281,4 +283,6 @@ void __cpuinit cpu_init (void) | |||
281 | set_debugreg(0UL, 7); | 283 | set_debugreg(0UL, 7); |
282 | 284 | ||
283 | fpu_init(); | 285 | fpu_init(); |
286 | |||
287 | raw_local_save_flags(kernel_eflags); | ||
284 | } | 288 | } |