linux-kernel - Re: WARNING: suspicious RCU usage in xfrm_get

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Message-ID: <0000000000004e05d8058488e521@google.com>
Date:   Wed, 20 Mar 2019 09:13:01 -0700
From:   syzbot <syzbot+2792672c6a63f1dc867c@...kaller.appspotmail.com>
To:     davem@...emloft.net, fw@...len.de, herbert@...dor.apana.org.au,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        steffen.klassert@...unet.com, suyj.fnst@...fujitsu.com,
        syzkaller-bugs@...glegroups.com
Subject: Re: WARNING: suspicious RCU usage in xfrm_get_sadinfo

syzbot has bisected this bug to:

commit f10e0010fae8174dc20bdc872bcaa85baa925cb7
Author: Su Yanjun <suyj.fnst@...fujitsu.com>
Date:   Thu Mar 7 01:54:08 2019 +0000

     net: xfrm: Add '_rcu' tag for rcu protected pointer in netns_xfrm

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11e8e843200000
start commit:   f10e0010 net: xfrm: Add '_rcu' tag for rcu protected point..
git tree:       linux-next
final crash:    https://syzkaller.appspot.com/x/report.txt?x=13e8e843200000
console output: https://syzkaller.appspot.com/x/log.txt?x=15e8e843200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=59cd5d43b5df6955
dashboard link: https://syzkaller.appspot.com/bug?extid=2792672c6a63f1dc867c
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11a2e24d200000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=131ab8ef200000

Reported-by: syzbot+2792672c6a63f1dc867c@...kaller.appspotmail.com
Fixes: f10e0010 ("net: xfrm: Add '_rcu' tag for rcu protected pointer in  
netns_xfrm")