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UPSTREAM: io_uring: always grab lock in io_cancel_async_work()

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It's not necessarily safe to check the task_list locklessly, remove
this micro optimization and always grab task_lock before deeming it
empty.

Bug: 278721720
Reported-and-tested-by: Lee Jones <lee@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit b0bfceaa8c)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I112708bdbe43f0e1c2cad5e73a56d7609c10d339
This commit is contained in:
Jens Axboe 2023-05-23 08:23:32 -06:00 • committed by Treehugger Robot
parent d4fabc5cbb
commit ce6a504d69
1 changed files with 0 additions and 3 deletions
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3
fs/io_uring.c
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@ -3735,9 +3735,6 @@ static void io_cancel_async_work(struct io_ring_ctx *ctx,
{
struct io_kiocb *req;
if (list_empty(&ctx->task_list))
return;
spin_lock_irq(&ctx->task_lock);
list_for_each_entry(req, &ctx->task_list, task_list) {