diff options
| author | Andy Lutomirski <luto@kernel.org> | 2016-07-14 16:22:54 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-07-15 04:26:27 -0400 |
| commit | 46aea3873401836abb7f01200e7946e7d518b359 (patch) | |
| tree | 9e20fb9a4c8a3fbc0446d33bc04547f9d84edf38 /lib/bitmap.c | |
| parent | 98f30b1207932b6553ea605c99393d8afca12324 (diff) | |
x86/mm/64: In vmalloc_fault(), use CR3 instead of current->active_mm
If we get a vmalloc fault while current->active_mm->pgd doesn't
match CR3, we'll crash without this change. I've seen this failure
mode on heavily instrumented kernels with virtually mapped stacks.
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>
Link: http://lkml.kernel.org/r/4650d7674185f165ed8fdf9ac4c5c35c5c179ba8.1468527351.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib/bitmap.c')
0 files changed, 0 insertions, 0 deletions