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 (file)
--- 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;