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io_uring-5.11-2021-02-05

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Merge tag 'io_uring-5.11-2021-02-05' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:
 "Two small fixes that should go into 5.11:

   - task_work resource drop fix (Pavel)

   - identity COW fix (Xiaoguang)"

* tag 'io_uring-5.11-2021-02-05' of git://git.kernel.dk/linux-block:
  io_uring: drop mm/files between task_work_submit
  io_uring: don't modify identity's files uncess identity is cowed
This commit is contained in:
Linus Torvalds 2021-02-06 14:37:24 -08:00
commit 860b45dae9
1 changed files with 3 additions and 6 deletions
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9
fs/io_uring.c
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@ -2205,6 +2205,9 @@ static void __io_req_task_submit(struct io_kiocb *req)
else
__io_req_task_cancel(req, -EFAULT);
mutex_unlock(&ctx->uring_lock);
if (ctx->flags & IORING_SETUP_SQPOLL)
io_sq_thread_drop_mm_files();
}
static void io_req_task_submit(struct callback_head *cb)
@ -8982,12 +8985,6 @@ static void io_uring_cancel_task_requests(struct io_ring_ctx *ctx,
if ((ctx->flags & IORING_SETUP_SQPOLL) && ctx->sq_data) {
atomic_dec(&task->io_uring->in_idle);
/*
* If the files that are going away are the ones in the thread
* identity, clear them out.
*/
if (task->io_uring->identity->files == files)
task->io_uring->identity->files = NULL;
io_sq_thread_unpark(ctx->sq_data);
}
}