diff options
| author | Florian Westphal <fw@strlen.de> | 2022-05-17 21:14:11 +0200 |
|---|---|---|
| committer | Florian Westphal <fw@strlen.de> | 2022-05-26 23:02:44 +0200 |
| commit | 4e1ccc035e7d9f93d817fda565e0cfdcbc0d6ef8 (patch) | |
| tree | c0c7a580c1fd5a11231f2426580eac69a53853d0 /Makefile | |
| parent | 09de09d51b0918418c3e052b7fa90611a36da221 (diff) | |
| download | nf-master.tar.gz | |
syzbot reports following warn:
WARNING: CPU: 0 PID: 3600 at net/netfilter/nfnetlink.c:703 nfnetlink_unbind+0x357/0x3b0 net/netfilter/nfnetlink.c:694
The syzbot generated program does this:
socket(AF_NETLINK, SOCK_RAW, NETLINK_NETFILTER) = 3
setsockopt(3, SOL_NETLINK, NETLINK_DROP_MEMBERSHIP, [1], 4) = 0
... which triggers 'WARN_ON_ONCE(nfnlnet->ctnetlink_listeners == 0)' check.
Instead of counting, just enable reporting for every bind request
and check if we still have listeners on unbind.
While at it, also add the needed bounds check on nfnl_group2type[]
access.
Reported-by: <syzbot+4903218f7fba0a2d6226@syzkaller.appspotmail.com>
Reported-by: <syzbot+afd2d80e495f96049571@syzkaller.appspotmail.com>
Fixes: 2794cdb0b97b ("netfilter: nfnetlink: allow to detect if ctnetlink listeners exist")
Signed-off-by: Florian Westphal <fw@strlen.de>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions