diff options
| author | Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | 2015-08-24 15:57:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-11-09 14:33:38 -0800 |
| commit | 5c418f1bde8deab2ab636d64d4e8465bc22b0bb8 (patch) | |
| tree | e28db908c614f48d00042355943783324b6fb7d9 /fs | |
| parent | a03bd0e033ca7b1d5394ebf17cd6e2f6a3395478 (diff) | |
ovl: free lower_mnt array in ovl_put_super
commit 5ffdbe8bf1e485026e1c7e4714d2841553cf0b40 upstream.
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>
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Fixes: dd662667e6d3 ("ovl: add mutli-layer infrastructure")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/overlayfs/super.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 865b8b1bec0c..d74af7f78fec 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -474,6 +474,7 @@ 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); |