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| author | Richard Weinberger <richard@nod.at> | 2018-09-03 23:06:23 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-13 09:33:17 +0200 |
| commit | ef37df3b8284c43ef0901c4c59d443ae790a31bb (patch) | |
| tree | b0700b21f2575ca3022377d2dc936e893dcf008a | |
| parent | 09fbdca26741ce4dac3fdec6d5098f71cc607bc2 (diff) | |
| download | linux-stable-ef37df3b8284c43ef0901c4c59d443ae790a31bb.tar.gz linux-stable-ef37df3b8284c43ef0901c4c59d443ae790a31bb.tar.bz2 linux-stable-ef37df3b8284c43ef0901c4c59d443ae790a31bb.zip | |
ubifs: Check for name being NULL while mounting
commit 37f31b6ca4311b94d985fb398a72e5399ad57925 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/ubifs/super.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index c5466c70d620..2a82aeeacba5 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1929,6 +1929,9 @@ 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)) |