[PATCH nf] netfilter: x_physdev: masks are not c-strings

[Florian Westphal <fw@strlen.de>]

... and must not be subjected to the 'nul terminated' constraint.
If the interface name is 15 characters long, the mask is 16-bytes
'0xff' (to cover for \0) and the valid device name is rejected.

Fixes: 8df772afc9d0 ("netfilter: x_physdev: reject empty or not-nul terminated device names")
Cc: stable@vger.kernel.org
Signed-off-by: Florian Westphal <fw@strlen.de>
---
 I'm dumb.  I pushed a test case to iptables.git and will include
 this in todays nf -> net batch.

 net/netfilter/xt_physdev.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/net/netfilter/xt_physdev.c b/net/netfilter/xt_physdev.c
index dd98f758176c..a388881c68d4 100644
--- a/net/netfilter/xt_physdev.c
+++ b/net/netfilter/xt_physdev.c
@@ -130,11 +130,6 @@ static int physdev_mt_check(const struct xt_mtchk_param *par)
 		if (X(physoutdev))
 			return -ENAMETOOLONG;
 	}
-
-	if (X(in_mask))
-		return -ENAMETOOLONG;
-	if (X(out_mask))
-		return -ENAMETOOLONG;
 #undef X
 
 	if (!brnf_probed) {
-- 
2.54.0