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Commit a1f9d8d2 authored by Latchesar Ionkov's avatar Latchesar Ionkov Committed by Linus Torvalds
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[PATCH] v9fs: replace strlen on newly allocated by __getname buffers to PATH_MAX 



v9fs_vfs_readlink allocates space for the link using __getname and
errorneously uses strlen on the newly allocated buffer to check if the buffer
passed by the user is bigger than the one returned by __getname.

The patch replaces the strlen usage to PATH_MAX, which is the actual size of
the buffers returned by __getname.

Signed-off-by: default avatarLatchesar Ionkov <lucho@ionkov.net>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent a8e63bff

fs/9p/vfs_inode.c

+2 −2
Original line number Diff line number Diff line
@@ -1063,8 +1063,8 @@ static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, 
	int ret;

	char *link = __getname();



	if (strlen(link) < buflen)

		buflen = strlen(link);

	if (buflen > PATH_MAX)

		buflen = PATH_MAX;



	dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);