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authorAl Viro <viro@ZenIV.linux.org.uk>2011-03-04 17:15:18 +0000
committerroot <Chris Mason chris.mason@oracle.com>2011-03-28 05:37:56 -0400
commitc055e99eea6e4f614267632fac546e7896c0227b (patch)
treedf65ff7c1a3b0c4301edffbadd9f23f9023e5159 /fs
parent92986796d84ef939e304099dece32572a755b280 (diff)
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btrfs: check link counter overflow in link(2)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/inode.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 4822b3132784..04babaf31a33 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4837,6 +4837,9 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
if (root->objectid != BTRFS_I(inode)->root->objectid)
return -EXDEV;
+ if (inode->i_nlink == ~0U)
+ return -EMLINK;
+
btrfs_inc_nlink(inode);
inode->i_ctime = CURRENT_TIME;