diff options
| author | Ilija Hadzic <ihadzic@research.bell-labs.com> | 2013-11-12 15:11:45 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-04 10:55:49 -0800 |
| commit | cc447613b50aa83ff466878dd6245153b1cfb95c (patch) | |
| tree | 88bef74398e75e52079b70a00ff722652df5705b /fs/devpts | |
| parent | 884181395dc053f31759ae0bd0c8ff88d143eb4e (diff) | |
devpts: plug the memory leak in kill_sb
commit 66da0e1f9034140ae2f571ef96e254a25083906c upstream.
When devpts is unmounted, there may be a no-longer-used IDR tree hanging
off the superblock we are about to kill. This needs to be cleaned up
before destroying the SB.
The leak is usually not a big deal because unmounting devpts is typically
done when shutting down the whole machine. However, shutting down an LXC
container instead of a physical machine exposes the problem (the garbage
is detectable with kmemleak).
Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/devpts')
| -rw-r--r-- | fs/devpts/inode.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c index 073d30b9d1ac..a726b9f29cb7 100644 --- a/fs/devpts/inode.c +++ b/fs/devpts/inode.c @@ -498,6 +498,7 @@ static void devpts_kill_sb(struct super_block *sb) { struct pts_fs_info *fsi = DEVPTS_SB(sb); + ida_destroy(&fsi->allocated_ptys); kfree(fsi); kill_litter_super(sb); } |