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Commit c055e99e authored by Al Viro's avatar Al Viro Committed by root
Browse files

btrfs: check link counter overflow in link(2) 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 92986796

fs/btrfs/inode.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -4837,6 +4837,9 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, 
	if (root->objectid != BTRFS_I(inode)->root->objectid)

	if (root->objectid != BTRFS_I(inode)->root->objectid)

		return -EXDEV;

		return -EXDEV;





	if (inode->i_nlink == ~0U)

		return -EMLINK;



	btrfs_inc_nlink(inode);

	btrfs_inc_nlink(inode);

	inode->i_ctime = CURRENT_TIME;

	inode->i_ctime = CURRENT_TIME;