From 32f5dea040ee6e3cc30ac52d23f1674fd5110d03 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Fri, 1 Sep 2023 13:59:19 -0600 Subject: [PATCH] io_uring/fdinfo: only print ->sq_array[] if it's there If a ring is setup with IORING_SETUP_NO_SQARRAY, then we don't have the SQ array. Don't try to dump info from it through fdinfo if that is the case. Reported-by: syzbot+216e2ea6e0bf4a0acdd7@syzkaller.appspotmail.com Fixes: 2af89abda7d9 ("io_uring: add option to remove SQ indirection") Reviewed-by: Gabriel Krisman Bertazi Signed-off-by: Jens Axboe --- io_uring/fdinfo.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/io_uring/fdinfo.c b/io_uring/fdinfo.c index 300455b4bc12..c53678875416 100644 --- a/io_uring/fdinfo.c +++ b/io_uring/fdinfo.c @@ -93,6 +93,8 @@ __cold void io_uring_show_fdinfo(struct seq_file *m, struct file *f) struct io_uring_sqe *sqe; unsigned int sq_idx; + if (ctx->flags & IORING_SETUP_NO_SQARRAY) + break; sq_idx = READ_ONCE(ctx->sq_array[entry & sq_mask]); if (sq_idx > sq_mask) continue; -- 2.11.0