From 12b677f2c697d61e5ddbcb6c1650050a39392f54 Mon Sep 17 00:00:00 2001 From: Zhengchao Shao Date: Fri, 9 Dec 2022 17:29:29 +0800 Subject: [PATCH] ipc: fix memory leak in init_mqueue_fs() When setup_mq_sysctls() failed in init_mqueue_fs(), mqueue_inode_cachep is not released. In order to fix this issue, the release path is reordered. Link: https://lkml.kernel.org/r/20221209092929.1978875-1-shaozhengchao@huawei.com Fixes: dc55e35f9e81 ("ipc: Store mqueue sysctls in the ipc namespace") Signed-off-by: Zhengchao Shao Cc: Alexey Gladkov Cc: "Eric W. Biederman" Cc: Jingyu Wang Cc: Muchun Song Cc: Roman Gushchin Cc: Waiman Long Cc: Wei Yongjun Cc: YueHaibing Cc: Yu Zhe Cc: Manfred Spraul Cc: Davidlohr Bueso Signed-off-by: Andrew Morton --- ipc/mqueue.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 467a194b8a2e..d09aa1c1e3e6 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -1726,7 +1726,8 @@ static int __init init_mqueue_fs(void) if (!setup_mq_sysctls(&init_ipc_ns)) { pr_warn("sysctl registration failed\n"); - return -ENOMEM; + error = -ENOMEM; + goto out_kmem; } error = register_filesystem(&mqueue_fs_type); @@ -1744,8 +1745,9 @@ static int __init init_mqueue_fs(void) out_filesystem: unregister_filesystem(&mqueue_fs_type); out_sysctl: - kmem_cache_destroy(mqueue_inode_cachep); retire_mq_sysctls(&init_ipc_ns); +out_kmem: + kmem_cache_destroy(mqueue_inode_cachep); return error; }