diff options
| author | Andy Lutomirski <[email protected]> | 2018-03-13 22:03:12 -0700 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2018-03-14 09:21:01 +0100 |
| commit | b5069782453459f6ec1fdeb495d9901a4545fcb5 (patch) | |
| tree | b7078170c6ca6d205dab92973f5d41a0d848d57d | |
| parent | 78393fdde2a456cafa414b171c90f26a3df98b20 (diff) | |
x86/vm86/32: Fix POPF emulation
POPF would trap if VIP was set regardless of whether IF was set. Fix it.
Suggested-by: Stas Sergeev <[email protected]>
Reported-by: Bart Oldeman <[email protected]>
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Fixes: 5ed92a8ab71f ("x86/vm86: Use the normal pt_regs area for vm86")
Link: http://lkml.kernel.org/r/ce95f40556e7b2178b6bc06ee9557827ff94bd28.1521003603.git.luto@kernel.org
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/kernel/vm86_32.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c index 5edb27f1a2c4..9d0b5af7db91 100644 --- a/arch/x86/kernel/vm86_32.c +++ b/arch/x86/kernel/vm86_32.c @@ -727,7 +727,8 @@ void handle_vm86_fault(struct kernel_vm86_regs *regs, long error_code) return; check_vip: - if (VEFLAGS & X86_EFLAGS_VIP) { + if ((VEFLAGS & (X86_EFLAGS_VIP | X86_EFLAGS_VIF)) == + (X86_EFLAGS_VIP | X86_EFLAGS_VIF)) { save_v86_state(regs, VM86_STI); return; } |