From: Pavel Begunkov asml.silence@gmail.com
mainline inclusion from mainline-5.8-rc1 commit 4518a3cc273cf82efdd36522fb1f13baad173c70 category: feature bugzilla: https://bugzilla.openeuler.org/show_bug.cgi?id=27 CVE: NA ---------------------------
In io_uring_cancel_files(), after refcount_sub_and_test() leaves 0 req->refs, it calls io_put_req(), which would also put a ref. Call io_free_req() instead.
Cc: stable@vger.kernel.org Fixes: 2ca10259b418 ("io_uring: prune request from overflow list on flush") Signed-off-by: Pavel Begunkov asml.silence@gmail.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: yangerkun yangerkun@huawei.com Reviewed-by: zhangyi (F) yi.zhang@huawei.com Signed-off-by: Cheng Jian cj.chengjian@huawei.com --- fs/io_uring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c index bd7c862f2d67..48965063ea68 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -7478,7 +7478,7 @@ static void io_uring_cancel_files(struct io_ring_ctx *ctx, * all we had, then we're done with this request. */ if (refcount_sub_and_test(2, &cancel_req->refs)) { - io_put_req(cancel_req); + io_free_req(cancel_req); finish_wait(&ctx->inflight_wait, &wait); continue; }