Commit 0511fdb4 authored by Al Viro's avatar Al Viro
Browse files

cifs_get_link(): bail out in unsafe case 



->d_revalidate() bails out there, anyway.  It's not enough
to prevent getting into ->get_link() in RCU mode, but that
could happen only in a very contrieved setup.  Not worth
trying to do anything fancy here unless ->d_revalidate()
stops kicking out of RCU mode at least in some cases.

Reviewed-by: default avatarChristian Brauner <brauner@kernel.org>
Acked-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 053fc4f7

fs/smb/client/cifsfs.c

+3 −0
Original line number Diff line number Diff line
@@ -1172,6 +1172,9 @@ const char *cifs_get_link(struct dentry *dentry, struct inode *inode, 
{

	char *target_path;



	if (!dentry)

		return ERR_PTR(-ECHILD);



	target_path = kmalloc(PATH_MAX, GFP_KERNEL);

	if (!target_path)

		return ERR_PTR(-ENOMEM);