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| author | Davidlohr Bueso <dave@stgolabs.net> | 2021-12-10 10:20:58 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-12-10 11:26:07 -0700 |
| commit | e6a59aac8a8713f335a37d762db0dbe80e7f6d38 (patch) | |
| tree | 5dbbaa64f3b99f6340475b25b58e0cd0d27b70b1 /tools/lib/symbol | |
| parent | a5c24552354ff1e35bb4022ebc0b791eb7882b04 (diff) | |
| download | linux-e6a59aac8a8713f335a37d762db0dbe80e7f6d38.tar.gz linux-e6a59aac8a8713f335a37d762db0dbe80e7f6d38.tar.bz2 linux-e6a59aac8a8713f335a37d762db0dbe80e7f6d38.zip | |
block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2)
do_each_pid_thread(PIDTYPE_PGID) can race with a concurrent
change_pid(PIDTYPE_PGID) that can move the task from one hlist
to another while iterating. Serialize ioprio_get to take
the tasklist_lock in this case, just like it's set counterpart.
Fixes: d69b78ba1de (ioprio: grab rcu_read_lock in sys_ioprio_{set,get}())
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Link: https://lore.kernel.org/r/20211210182058.43417-1-dave@stgolabs.net
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/lib/symbol')
0 files changed, 0 insertions, 0 deletions