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(parent: 85be9ae) | patch
exit: Guarantee make_task_dead leaks the tsk when calling do_task_exit
authorEric W. Biederman <ebiederm@xmission.com>
Wed, 5 Jan 2022 22:30:21 +0000 (16:30 -0600)
committerEric W. Biederman <ebiederm@xmission.com>
Sat, 8 Jan 2022 16:51:23 +0000 (10:51 -0600)
commit912616f142bfeb1dc41f40dbe7ce38331886a94a
treed29c454bf48689bce407da914b8d5fbe4a3ccbd4tree | snapshot
parent85be9ae7b63092895b6e7ac87a3ef383c679866ccommit | diff
exit: Guarantee make_task_dead leaks the tsk when calling do_task_exit

Change the task state to EXIT_DEAD and take an extra rcu_refernce
to guarantee the task will not be reaped and that it will not be
freed.

Link: https://lkml.kernel.org/r/YdUzjrLAlRiNLQp2@zeniv-ca.linux.org.uk
Pointed-out-by: Al Viro <viro@zeniv.linux.org.uk>
Fixes: 7f80a2fd7db9 ("exit: Stop poorly open coding do_task_dead in make_task_dead")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
kernel/exit.c diff | blob | history
Domain: System / Kernel;