From 13b6269dd022aaa69ca8d1df374ab327504121cf Mon Sep 17 00:00:00 2001
From: Shang XiaoJing <shangxiaojing@huawei.com>
Date: Tue, 1 Nov 2022 19:15:33 +0800
Subject: [PATCH] ocfs2: fix memory leak in ocfs2_stack_glue_init()
Git-commit: 13b6269dd022aaa69ca8d1df374ab327504121cf
Patch-mainline: v6.2-rc1
References: bsc#1207651
ocfs2_table_header should be free in ocfs2_stack_glue_init() if
ocfs2_sysfs_init() failed, otherwise kmemleak will report memleak.
Bug: memory leak
unreferenced object 0xffff88810eeb5800 (size 128):
comm "modprobe", pid 4507, jiffies 4296182506 (age 55.888s)
hex dump (first 32 bytes):
c0 40 14 a0 ff ff ff ff 00 00 00 00 01 00 00 00 .@..............
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<000000001e59e1cd>] __register_sysctl_table+0xca/0xef0
[<00000000c04f70f7>] 0xffffffffa0050037
[<000000001bd12912>] do_one_initcall+0xdb/0x480
[<0000000064f766c9>] do_init_module+0x1cf/0x680
[<000000002ba52db0>] load_module+0x6441/0x6f20
[<000000009772580d>] __do_sys_finit_module+0x12f/0x1c0
[<00000000380c1f22>] do_syscall_64+0x3f/0x90
[<000000004cf473bc>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
Link: https://lkml.kernel.org/r/41651ca1-432a-db34-eb97-d35744559de1@linux.alibaba.com
Fixes: 3878f110f71a ("ocfs2: Move the hb_ctl_path sysctl into the stack glue.")
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Jan Kara <jack@suse.cz>
---
fs/ocfs2/stackglue.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -703,6 +703,8 @@ static struct ctl_table_header *ocfs2_ta
static int __init ocfs2_stack_glue_init(void)
{
+ int ret;
+
strcpy(cluster_stack_name, OCFS2_STACK_PLUGIN_O2CB);
ocfs2_table_header = register_sysctl_table(ocfs2_root_table);
@@ -712,7 +714,11 @@ static int __init ocfs2_stack_glue_init(
return -ENOMEM; /* or something. */
}
- return ocfs2_sysfs_init();
+ ret = ocfs2_sysfs_init();
+ if (ret)
+ unregister_sysctl_table(ocfs2_table_header);
+
+ return ret;
}
static void __exit ocfs2_stack_glue_exit(void)