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authorChris Mason <chris.mason@oracle.com>2009-06-11 11:13:35 -0400
committerChris Mason <chris.mason@oracle.com>2009-06-11 11:13:35 -0400
commit0b4dcea579a1b6f4d249d61f5bc8adeaa7c895d8 (patch)
tree2d8c0a56d853516136fcf9ff43672aca9f011057
parent067c28adc53807514ac0c6ebb6af3243cbd071fa (diff)
downloadop-kernel-dev-0b4dcea579a1b6f4d249d61f5bc8adeaa7c895d8.zip
op-kernel-dev-0b4dcea579a1b6f4d249d61f5bc8adeaa7c895d8.tar.gz
Btrfs: fix oops when btrfs_inherit_iflags called with a NULL dir
This happens during subvol creation. Signed-off-by: Chris Mason <chris.mason@oracle.com>
-rw-r--r--fs/btrfs/ioctl.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 926332a..eff18f5 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -112,7 +112,12 @@ void btrfs_update_iflags(struct inode *inode)
*/
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir)
{
- unsigned int flags = BTRFS_I(dir)->flags;
+ unsigned int flags;
+
+ if (!dir)
+ return;
+
+ flags = BTRFS_I(dir)->flags;
if (S_ISREG(inode->i_mode))
flags &= ~BTRFS_INODE_DIRSYNC;
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