diff options
| author |   Kees Cook <keescook@chromium.org> | 2012-08-15 11:41:55 -0700 |
|---|---|---|
| committer |   James Morris <james.l.morris@oracle.com> | 2012-08-17 20:40:38 +1000 |
| commit | 7612bfeecc197bbb6629842b5c6ff1967f0a9b70 (patch) | |
| tree | d73acd2bc97866b256a70acb83e4ca69bce6e32d /mm/memory.c | |
| parent | Linux 3.6-rc2 (diff) | |
| download | linux-dev-7612bfeecc197bbb6629842b5c6ff1967f0a9b70.tar.xz linux-dev-7612bfeecc197bbb6629842b5c6ff1967f0a9b70.zip | |
Yama: access task_struct->comm directly
The core ptrace access checking routine holds a task lock, and when
reporting a failure, Yama takes a separate task lock. To avoid a
potential deadlock with two ptracers taking the opposite locks, do not
use get_task_comm() and just use ->comm directly since accuracy is not
important for the report.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Suggested-by: Oleg Nesterov <oleg@redhat.com>
CC: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'mm/memory.c')
0 files changed, 0 insertions, 0 deletions