diff options
| author | Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | 2015-08-24 15:57:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-11-09 14:33:37 -0800 |
| commit | a03bd0e033ca7b1d5394ebf17cd6e2f6a3395478 (patch) | |
| tree | f2b3b2d046ee1305c9da3684bddc9708835f1bb6 | |
| parent | ca9ba892ebc734af45a9b61d9bc4169f73f8e379 (diff) | |
ovl: free stack of paths in ovl_fill_super
commit 0f95502ad84874b3c05fc7cdd9d4d9d5cddf7859 upstream.
This fixes small memory leak after mount.
Kmemleak report:
unreferenced object 0xffff88003683fe00 (size 16):
comm "mount", pid 2029, jiffies 4294909563 (age 33.380s)
hex dump (first 16 bytes):
20 27 1f bb 00 88 ff ff 40 4b 0f 36 02 88 ff ff '......@K.6....
backtrace:
[<ffffffff811f8cd4>] create_object+0x124/0x2c0
[<ffffffff817a059b>] kmemleak_alloc+0x7b/0xc0
[<ffffffff811dffe6>] __kmalloc+0x106/0x340
[<ffffffffa01b7a29>] ovl_fill_super+0x389/0x9a0 [overlay]
[<ffffffff81200ac4>] mount_nodev+0x54/0xa0
[<ffffffffa01b7118>] 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: a78d9f0d5d5c ("ovl: support multiple lower layers")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 33f2d27a6792..865b8b1bec0c 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -981,6 +981,7 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent) oe->lowerstack[i].dentry = stack[i].dentry; oe->lowerstack[i].mnt = ufs->lower_mnt[i]; } + kfree(stack); root_dentry->d_fsdata = oe; |