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authorMiklos Szeredi <mszeredi@suse.cz>2013-09-03 16:28:38 +0400
committerMiklos Szeredi <mszeredi@suse.cz>2013-09-03 16:28:38 +0400
commitefeb9e60d48f7778fdcad4a0f3ad9ea9b19e5dfd (patch)
tree3cade63dc511e557d9f99cfb810d2d3c64351e4b /fs/fuse/dir.c
parent06a7c3c2781409af95000c60a5df743fd4e2f8b4 (diff)
downloadlinux-efeb9e60d48f7778fdcad4a0f3ad9ea9b19e5dfd.tar.xz
fuse: readdir: check for slash in names
Userspace can add names containing a slash character to the directory listing. Don't allow this as it could cause all sorts of trouble. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Cc: stable@vger.kernel.org
Diffstat (limited to 'fs/fuse/dir.c')
-rw-r--r--fs/fuse/dir.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index c8334f75c8c9..8fec28ff4a0d 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1174,6 +1174,8 @@ static int parse_dirfile(char *buf, size_t nbytes, struct file *file,
return -EIO;
if (reclen > nbytes)
break;
+ if (memchr(dirent->name, '/', dirent->namelen) != NULL)
+ return -EIO;
if (!dir_emit(ctx, dirent->name, dirent->namelen,
dirent->ino, dirent->type))
@@ -1320,6 +1322,8 @@ static int parse_dirplusfile(char *buf, size_t nbytes, struct file *file,
return -EIO;
if (reclen > nbytes)
break;
+ if (memchr(dirent->name, '/', dirent->namelen) != NULL)
+ return -EIO;
if (!over) {
/* We fill entries into dstbuf only as much as