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7612bfeecc
linux/security/yama
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Kees Cook 7612bfeecc 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>
2012-08-17 20:40:38 +10:00
..
Kconfig security: Yama LSM 2012-02-10 09:18:52 +11:00
Makefile security: Yama LSM 2012-02-10 09:18:52 +11:00
yama_lsm.c Yama: access task_struct->comm directly 2012-08-17 20:40:38 +10:00