From: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
To: linux-unionfs@vger.kernel.org, Miklos Szeredi <miklos@szeredi.hu>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: [PATCH 2/2] ovl: free lower_mnt array in ovl_put_super
Date: Tue, 21 Jul 2015 17:58:44 +0300 [thread overview]
Message-ID: <20150721145844.11975.16773.stgit@buzz> (raw)
In-Reply-To: <20150721145843.11975.3849.stgit@buzz>
This fixes memory leak after umount.
Kmemleak report:
unreferenced object 0xffff8800ba791010 (size 8):
comm "mount", pid 2394, jiffies 4294996294 (age 53.920s)
hex dump (first 8 bytes):
20 1c 13 02 00 88 ff ff .......
backtrace:
[<ffffffff811f8cd4>] create_object+0x124/0x2c0
[<ffffffff817a059b>] kmemleak_alloc+0x7b/0xc0
[<ffffffff811dffe6>] __kmalloc+0x106/0x340
[<ffffffffa0152bfc>] ovl_fill_super+0x55c/0x9b0 [overlay]
[<ffffffff81200ac4>] mount_nodev+0x54/0xa0
[<ffffffffa0152118>] ovl_mount+0x18/0x20 [overlay]
[<ffffffff81201ab3>] mount_fs+0x43/0x170
[<ffffffff81220d34>] vfs_kern_mount+0x74/0x170
[<ffffffff812233ad>] do_mount+0x22d/0xdf0
[<ffffffff812242cb>] SyS_mount+0x7b/0xc0
[<ffffffff817b6bee>] entry_SYSCALL_64_fastpath+0x12/0x76
[<ffffffffffffffff>] 0xffffffffffffffff
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: dd662667e6d3 ("ovl: add mutli-layer infrastructure")
---
fs/overlayfs/super.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index ea9b1c20d48f..afcf825c384c 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -544,6 +544,7 @@ static void ovl_put_super(struct super_block *sb)
mntput(ufs->upper_mnt);
for (i = 0; i < ufs->numlower; i++)
mntput(ufs->lower_mnt[i]);
+ kfree(ufs->lower_mnt);
kfree(ufs->config.lowerdir);
kfree(ufs->config.upperdir);
next prev parent reply other threads:[~2015-07-21 14:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-21 14:58 [PATCH 1/2] ovl: free stack of paths in ovl_fill_super Konstantin Khlebnikov
2015-07-21 14:58 ` Konstantin Khlebnikov [this message]
2015-07-21 15:27 ` [PATCH 2/2] ovl: free lower_mnt array in ovl_put_super Greg KH
2015-07-21 15:27 ` [PATCH 1/2] ovl: free stack of paths in ovl_fill_super Greg KH
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