diff options
author | Andy Lutomirski <luto@kernel.org> | 2016-09-30 10:58:56 -0700 |
---|---|---|
committer | Ingo Molnar <mingo@kernel.org> | 2016-10-20 09:21:41 +0200 |
commit | 0a1eb2d474edfe75466be6b4677ad84e5e8ca3f5 (patch) | |
tree | 3966a6309145b8e7982d32e4903c64654118d697 /fs/proc/task_mmu.c | |
parent | 137baabe351e0554d06c6d5c84059fe343e2791e (diff) | |
download | linux-0a1eb2d474edfe75466be6b4677ad84e5e8ca3f5.tar.bz2 |
fs/proc: Stop reporting eip and esp in /proc/PID/stat
Reporting these fields on a non-current task is dangerous. If the
task is in any state other than normal kernel code, they may contain
garbage or even kernel addresses on some architectures. (x86_64
used to do this. I bet lots of architectures still do.) With
CONFIG_THREAD_INFO_IN_TASK=y, it can OOPS, too.
As far as I know, there are no use programs that make any material
use of these fields, so just get rid of them.
Reported-by: Jann Horn <jann@thejh.net>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Linux API <linux-api@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Tycho Andersen <tycho.andersen@canonical.com>
Link: http://lkml.kernel.org/r/a5fed4c3f4e33ed25d4bb03567e329bc5a712bcc.1475257877.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'fs/proc/task_mmu.c')
0 files changed, 0 insertions, 0 deletions