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| author | Liu Bo <bo.li.liu@oracle.com> | 2012-11-05 12:42:09 (GMT) |
|---|---|---|
| committer | Josef Bacik <jbacik@fusionio.com> | 2012-12-12 22:15:25 (GMT) |
| commit | 109f2365f1928af241b2ccbd0f6ba0b93d911288 (patch) | |
| tree | 60be3ee8c1154534a691c8136ce3e39e69c7cc00 /fs | |
| parent | 37c4146d2208ba7e4463e8dd95a1bf9e3d865280 (diff) | |
| download | linux-fsl-qoriq-109f2365f1928af241b2ccbd0f6ba0b93d911288.tar.xz | |
Btrfs: fix a double free on pending snapshots in error handling
When creating a snapshot, failing to commit a transaction can end up
with aborting the transaction, following by doing a cleanup for it, where
we'll free all snapshots pending to disk.
So we check it and avoid double free on pending snapshots.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/ioctl.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 14c0d2e..e262cd8 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -571,8 +571,12 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry, ret = btrfs_commit_transaction(trans, root->fs_info->extent_root); } - if (ret) + if (ret) { + /* cleanup_transaction has freed this for us */ + if (trans->aborted) + pending_snapshot = NULL; goto fail; + } ret = pending_snapshot->error; if (ret) |