From 32f5dea040ee6e3cc30ac52d23f1674fd5110d03 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
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 <krisman@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
io_uring/fdinfo.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/io_uring/fdinfo.c b/io_uring/fdinfo.c
index 300455b4bc122..c536788754164 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;
--
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