linux-kernel - Re: WARNING in netlink

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Message-ID: <20885c52-90fe-a5fa-4528-742b1a9dba01@gmail.com>
Date:   Fri, 12 Jan 2018 08:59:51 -0700
From:   David Ahern <dsahern@...il.com>
To:     Xin Long <lucien.xin@...il.com>,
        syzbot <syzbot+315fa6766d0f7c359327@...kaller.appspotmail.com>
Cc:     Jason@...c4.com, Andrey Vagin <avagin@...nvz.org>,
        davem <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
        elena.reshetova@...el.com,
        Herbert Xu <herbert@...dor.apana.org.au>, ishkamiel@...il.com,
        johannes.berg@...el.com, keescook@...omium.org,
        LKML <linux-kernel@...r.kernel.org>,
        network dev <netdev@...r.kernel.org>,
        syzkaller-bugs@...glegroups.com
Subject: Re: WARNING in netlink_ack (2)

On 1/12/18 4:34 AM, Xin Long wrote:
>> audit: type=1400 audit(1515595879.379:7): avc:  denied  { map } for
>> pid=3498 comm="syzkaller002174" path="/root/syzkaller002174137" dev="sda1"
>> ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
>> tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
>> tc_ctl_action: received NO action attribs
>> WARNING: CPU: 0 PID: 3498 at net/netlink/af_netlink.c:2365
>> netlink_ack+0x625/0xa10 net/netlink/af_netlink.c:2363
>> Kernel panic - not syncing: panic_on_warn set ...
> 
> shoudn't the extack be cleared after the ack for one msg ?
> 

I sent a patch 2 days ago to do that; waiting for Dave to pick it up.