Commit 5b313bcb authored by Al Viro's avatar Al Viro
Browse files

teach filename_lookup() to treat NULL filename as "" 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 9852d85e

fs/namei.c

+3 −1
Original line number Diff line number Diff line
@@ -588,6 +588,7 @@ struct nameidata { 
		unsigned seq;

	} *stack, internal[EMBEDDED_LEVELS];

	struct filename	*name;

	const char *pathname;

	struct nameidata *saved;

	unsigned	root_seq;

	int		dfd;
@@ -606,6 +607,7 @@ static void __set_nameidata(struct nameidata *p, int dfd, struct filename *name) 
	p->depth = 0;

	p->dfd = dfd;

	p->name = name;

	p->pathname = likely(name) ? name->name : "";

	p->path.mnt = NULL;

	p->path.dentry = NULL;

	p->total_link_count = old ? old->total_link_count : 0;
@@ -2439,7 +2441,7 @@ static int link_path_walk(const char *name, struct nameidata *nd) 
static const char *path_init(struct nameidata *nd, unsigned flags)

{

	int error;

	const char *s = nd->name->name;

	const char *s = nd->pathname;



	/* LOOKUP_CACHED requires RCU, ask caller to retry */

	if ((flags & (LOOKUP_RCU | LOOKUP_CACHED)) == LOOKUP_CACHED)