syzbot


general protection fault in put_cmsg
Status: fixed on 2020/07/17 17:58
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: 1b2f08df ipv6: set msg_control_is_user in do_ipv6_getsockopt
First crash: 91d, last: 91d

Cause bisection: introduced by (bisect log):

commit 1f466e1f15cf1dac7c86798d694649fc42cd868a
Author: Christoph Hellwig <hch@lst.de>
Date: Mon May 11 11:59:13 2020 +0000

  net: cleanly handle kernel vs user buffers for ->msg_control

Crash: general protection fault in put_cmsg (log)
Repro: C syz .config

Sample crash report:

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci-upstream-net-kasan-gce 2020/05/12 22:30 net-next 51fa960d a44eb8f7 .config log report syz C arnd@arndb.de, davem@davemloft.net, deepa.kernel@gmail.com, gregkh@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-net-kasan-gce 2020/05/13 06:40 net-next 51fa960d a44eb8f7 .config log report allison@lohutok.net, arnd@arndb.de, davem@davemloft.net, deepa.kernel@gmail.com, gregkh@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de
ci-upstream-net-kasan-gce 2020/05/12 22:05 net-next 51fa960d a44eb8f7 .config log report allison@lohutok.net, arnd@arndb.de, davem@davemloft.net, gregkh@linuxfoundation.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tglx@linutronix.de