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authorMiklos Szeredi <mszeredi@suse.cz>2013-09-03 14:28:38 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-09-26 17:18:30 -0700
commite5362560a01dd6fac5922434e16b16a1accea504 (patch)
treeed7744c4b7d4cc07328f3497d0c10597524f1f24 /fs/fuse/dir.c
parent4e208303119d234347b1f4337b84d47306e73811 (diff)
downloadlinux-linaro-stable-e5362560a01dd6fac5922434e16b16a1accea504.tar.gz
fuse: readdir: check for slash in names
commit efeb9e60d48f7778fdcad4a0f3ad9ea9b19e5dfd upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 a30c60d5ce4f..e67b13de2ebc 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1175,6 +1175,8 @@ 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;
over = filldir(dstbuf, dirent->name, dirent->namelen,
file->f_pos, dirent->ino, dirent->type);
@@ -1323,6 +1325,8 @@ 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