Unverified Commit ff58f8a1 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!14467 io_uring/tctx: work around xa_store() allocation error issue 

Merge Pull Request from: @ci-robot 
 
PR sync from: Long Li <leo.lilong@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/SV6DNGTSCNPZ3C4BVOIKWLD3GLFYIOMG/ 
 
https://gitee.com/src-openeuler/kernel/issues/IBEAP3 
 
Link:https://gitee.com/openeuler/kernel/pulls/14467

 

Reviewed-by: default avatarLi Nan <linan122@huawei.com>
Signed-off-by: default avatarLi Nan <linan122@huawei.com>
parents 0ab6c5bc 2c4dc5d7

io_uring/io_uring.c

+12 −1
Original line number Diff line number Diff line
@@ -8542,8 +8542,19 @@ static int io_uring_alloc_task_context(struct task_struct *task, 
void __io_uring_free(struct task_struct *tsk)

{

	struct io_uring_task *tctx = tsk->io_uring;

	struct io_tctx_node *node;

	unsigned long index;



	WARN_ON_ONCE(!xa_empty(&tctx->xa));

	/*

	 * Fault injection forcing allocation errors in the xa_store() path

	 * can lead to xa_empty() returning false, even though no actual

	 * node is stored in the xarray. Until that gets sorted out, attempt

	 * an iteration here and warn if any entries are found.

	 */

	xa_for_each(&tctx->xa, index, node) {

		WARN_ON_ONCE(1);

		break;

	}

	WARN_ON_ONCE(tctx->io_wq);

	WARN_ON_ONCE(tctx->cached_refs);