]> git.baikalelectronics.ru Git - kernel.git/commit
x86/entry/32: Fix FS and GS restore in opportunistic SYSEXIT
authorAndy Lutomirski <luto@kernel.org>
Fri, 16 Oct 2015 22:42:55 +0000 (15:42 -0700)
committerIngo Molnar <mingo@kernel.org>
Sun, 18 Oct 2015 10:11:16 +0000 (12:11 +0200)
commit125cbdcaf0f77bd8f699199b5f5fb14e917cc9f3
tree89bc78824c420dafce56d7056571fa11384b03b8
parent04758844a55b8c33de116351734fcf7ce7e9ea06
x86/entry/32: Fix FS and GS restore in opportunistic SYSEXIT

We either need to restore them before popping and thus changing
ESP, or we need to adjust the offsets.  The former is simpler.

Reported-and-tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
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: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 5685b89df7f2 x86/entry/32: ("Re-implement SYSENTER using the new C path")
Link: http://lkml.kernel.org/r/461e5c7d8fa3821529893a4893ac9c4bc37f9e17.1445035014.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/entry/entry_32.S