[PATCH] fuse: validate rootmode mount option

If rootmode isn't valid, we hit the BUG() in fuse_init_inode.  Now
EINVAL is returned.

Signed-off-by: Timo Savola <tsavola@movial.fi>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 5ab8e50e7808..608db81219a0 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -330,6 +330,8 @@ static int parse_fuse_opt(char *opt, struct fuse_mount_data *d, int is_bdev)
                 case OPT_ROOTMODE:
                         if (match_octal(&args[0], &value))
                                 return 0;
+                        if (!fuse_valid_type(value))
+                                return 0;
                         d->rootmode = value;
                         d->rootmode_present = 1;
                         break;