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authorFlorian Westphal <fw@strlen.de>2019-04-15 00:43:00 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2019-04-22 10:34:30 +0200
commit7caa56f006e9d712b44f27b32520c66420d5cbc6 (patch)
tree92849a0fef03ca4c21e897dbf43a7e3aa2e07cf0 /net
parent5bdac418f33f60b07a34e01e722889140ee8fac9 (diff)
downloadlinux-7caa56f006e9d712b44f27b32520c66420d5cbc6.tar.bz2
netfilter: ebtables: CONFIG_COMPAT: drop a bogus WARN_ON
It means userspace gave us a ruleset where there is some other data after the ebtables target but before the beginning of the next rule. Fixes: 81e675c227ec ("netfilter: ebtables: add CONFIG_COMPAT support") Reported-by: syzbot+659574e7bcc7f7eb4df7@syzkaller.appspotmail.com Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
-rw-r--r--net/bridge/netfilter/ebtables.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index eb15891f8b9f..3cad01ac64e4 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -2032,7 +2032,8 @@ static int ebt_size_mwt(struct compat_ebt_entry_mwt *match32,
if (match_kern)
match_kern->match_size = ret;
- if (WARN_ON(type == EBT_COMPAT_TARGET && size_left))
+ /* rule should have no remaining data after target */
+ if (type == EBT_COMPAT_TARGET && size_left)
return -EINVAL;
match32 = (struct compat_ebt_entry_mwt *) buf;