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io_uring-6.13-20241228

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Merge tag 'io_uring-6.13-20241228' of git://git.kernel.dk/linux

Pull io_uring fix from Jens Axboe:
 "Just a single fix for a theoretical issue with SQPOLL setup"

* tag 'io_uring-6.13-20241228' of git://git.kernel.dk/linux:
  io_uring/sqpoll: fix sqpoll error handling races
This commit is contained in:
Linus Torvalds 2024-12-28 11:00:29 -08:00
commit d19a3ee573
1 changed files with 6 additions and 0 deletions
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6
io_uring/sqpoll.c
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@ -405,6 +405,7 @@ void io_sqpoll_wait_sq(struct io_ring_ctx *ctx)
__cold int io_sq_offload_create(struct io_ring_ctx *ctx,
struct io_uring_params *p)
{
struct task_struct *task_to_put = NULL;
int ret;
/* Retain compatibility with failing for an invalid attach attempt */
@ -480,6 +481,7 @@ __cold int io_sq_offload_create(struct io_ring_ctx *ctx,
}
sqd->thread = tsk;
task_to_put = get_task_struct(tsk);
ret = io_uring_alloc_task_context(tsk, ctx);
wake_up_new_task(tsk);
if (ret)
@ -490,11 +492,15 @@ __cold int io_sq_offload_create(struct io_ring_ctx *ctx,
goto err;
}
if (task_to_put)
put_task_struct(task_to_put);
return 0;
err_sqpoll:
complete(&ctx->sq_data->exited);
err:
io_sq_thread_finish(ctx);
if (task_to_put)
put_task_struct(task_to_put);
return ret;
}