From: Jens Axboe <axboe@kernel.dk>
Date: Thu, 5 Nov 2020 16:50:16 +0000 (-0700)
Subject: io_uring: use correct pointer for io_uring_show_cred()
X-Git-Tag: v5.15~2382^2~8
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6b47ab81c9a9b56a94882815e9949d40e4207c92;p=platform%2Fkernel%2Flinux-starfive.git

io_uring: use correct pointer for io_uring_show_cred()

Previous commit changed how we index the registered credentials, but
neglected to update one spot that is used when the personalities are
iterated through ->show_fdinfo(). Ensure we use the right struct type
for the iteration.

Reported-by: syzbot+a6d494688cdb797bdfce@syzkaller.appspotmail.com
Fixes: 1e6fa5216a0e ("io_uring: COW io_identity on mismatch")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 3d489cf..29f1417 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8974,7 +8974,8 @@ out_fput:
 #ifdef CONFIG_PROC_FS
 static int io_uring_show_cred(int id, void *p, void *data)
 {
-	const struct cred *cred = p;
+	struct io_identity *iod = p;
+	const struct cred *cred = iod->creds;
 	struct seq_file *m = data;
 	struct user_namespace *uns = seq_user_ns(m);
 	struct group_info *gi;