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authorRichard Weinberger <richard@nod.at>2018-09-03 23:06:23 +0200
committerRichard Weinberger <richard@nod.at>2018-09-20 21:37:07 +0200
commit37f31b6ca4311b94d985fb398a72e5399ad57925 (patch)
tree9d7931dccf8426d2d9e0d4910db908b717316cb3
parentae596de1a0c8c2c924dc99d23c026259372ab234 (diff)
ubifs: Check for name being NULL while mounting
The requested device name can be NULL or an empty string. Check for that and refuse to continue. UBIFS has to do this manually since we cannot use mount_bdev(), which checks for this condition. Fixes: 1e51764a3c2ac ("UBIFS: add new flash file system") Reported-by: syzbot+38bd0f7865e5c6379280@syzkaller.appspotmail.com Signed-off-by: Richard Weinberger <richard@nod.at>
-rw-r--r--fs/ubifs/super.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 23e7042666a7..87d08f738632 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1954,6 +1954,9 @@ static struct ubi_volume_desc *open_ubi(const char *name, int mode)
int dev, vol;
char *endptr;
+ if (!name || !*name)
+ return ERR_PTR(-EINVAL);
+
/* First, try to open using the device node path method */
ubi = ubi_open_volume_path(name, mode);
if (!IS_ERR(ubi))