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| author | Jens Axboe <axboe@kernel.dk> | 2024-03-18 20:22:42 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-03-18 20:22:42 -0600 |
| commit | 1251d2025c3e1bcf1f17ec0f3c0dfae5e5bbb146 (patch) | |
| tree | 47be0e27dc797162dab74f10305223ed5a3dee8e /io_uring | |
| parent | e21e1c45e1fe2e31732f40256b49c04e76a17cee (diff) | |
| download | linux-1251d2025c3e1bcf1f17ec0f3c0dfae5e5bbb146.tar.gz | |
io_uring/sqpoll: early exit thread if task_context wasn't allocated
Ideally we'd want to simply kill the task rather than wake it, but for
now let's just add a startup check that causes the thread to exit.
This can only happen if io_uring_alloc_task_context() fails, which
generally requires fault injection.
Reported-by: Ubisectech Sirius <bugreport@ubisectech.com>
Fixes: af5d68f8892f ("io_uring/sqpoll: manage task_work privately")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/sqpoll.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/io_uring/sqpoll.c b/io_uring/sqpoll.c index 363052b4ea76a2..3983708cef5b43 100644 --- a/io_uring/sqpoll.c +++ b/io_uring/sqpoll.c @@ -274,6 +274,10 @@ static int io_sq_thread(void *data) char buf[TASK_COMM_LEN]; DEFINE_WAIT(wait); + /* offload context creation failed, just exit */ + if (!current->io_uring) + goto err_out; + snprintf(buf, sizeof(buf), "iou-sqp-%d", sqd->task_pid); set_task_comm(current, buf); @@ -371,7 +375,7 @@ static int io_sq_thread(void *data) atomic_or(IORING_SQ_NEED_WAKEUP, &ctx->rings->sq_flags); io_run_task_work(); mutex_unlock(&sqd->lock); - +err_out: complete(&sqd->exited); do_exit(0); } |