From c86d18f4aa93e0e66cda0e55827cd03eea6bc5f8 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Fri, 25 Mar 2022 16:36:31 +0000
Subject: [PATCH] io_uring: fix memory leak of uid in files registration
Git-commit: c86d18f4aa93e0e66cda0e55827cd03eea6bc5f8
Patch-mainline: v5.18-rc1
References: bsc#1205205

When there are no files for __io_sqe_files_scm() to process in the
range, it'll free everything and return. However, it forgets to put uid.

Fixes: 08a451739a9b5 ("io_uring: allow sparse fixed file sets")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/accee442376f33ce8aaebb099d04967533efde92.1648226048.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
---
 fs/io_uring.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index cc3a22d60fb4..39a9ff31dbc5 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8845,6 +8845,7 @@ static int __io_sqe_files_scm(struct io_ring_ctx *ctx, int nr, int offset)
 			fput(fpl->fp[i]);
 	} else {
 		kfree_skb(skb);
+		free_uid(fpl->user);
 		kfree(fpl);
 	}
 
-- 
2.35.3