diff options
| author |   Andy Lutomirski <luto@kernel.org> | 2018-03-13 22:03:12 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2018-03-14 09:21:01 +0100 |
| commit | b5069782453459f6ec1fdeb495d9901a4545fcb5 (patch) | |
| tree | b7078170c6ca6d205dab92973f5d41a0d848d57d /arch | |
| parent | selftests/x86/entry_from_vm86: Add test cases for POPF (diff) | |
| download | linux-dev-b5069782453459f6ec1fdeb495d9901a4545fcb5.tar.xz linux-dev-b5069782453459f6ec1fdeb495d9901a4545fcb5.zip | |
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 <stsp@list.ru>
Reported-by: Bart Oldeman <bartoldeman@gmail.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
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 <mingo@kernel.org>
Diffstat (limited to 'arch')
| -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; } |