[PATCH] FUSE: Validate rootmode mount option

[Timo Savola]

If rootmode doesn't include any file type bits, we hit the BUG() in
fuse_init_inode.  Now EINVAL is returned.

Signed-off-by: Timo Savola <tsavola@xxxxxxxxx>
---
 fs/fuse/inode.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 5ab8e50..503c9cd 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 ((value & S_IFMT) == 0)
+				return 0;
 			d->rootmode = value;
 			d->rootmode_present = 1;
 			break;
-- 
1.4.4.4

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