syzbot


general protection fault in inet_csk_accept
Status: upstream: reported C repro on 2021/12/10 11:09
Reported-by: syzbot+e4d843bb96a9431e6331@syzkaller.appspotmail.com
Fix commit: b0cdc5dbcf2b mptcp: never allow the PM to close a listener subflow
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64 ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386]
First crash: 49d, last: 49d

Cause bisection: introduced by (bisect log) :
commit 7f700334be9aeb91d5d86ef9ad2d901b9b453e9b
Author: Eric Dumazet <edumazet@google.com>
Date: Mon Mar 29 18:39:51 2021 +0000

  ip6_gre: proper dev_{hold|put} in ndo_[un]init methods

Crash: unregister_netdevice: waiting for DEV to become free (log)
Repro: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2021/12/10 18:26 15m pabeni@redhat.com patch net OK
2021/12/10 12:27 15m pabeni@redhat.com patch net OK

Sample crash report:

Crashes (8):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2021/12/08 22:52 upstream 2a987e65025e a4a2a501 .config log report syz C general protection fault in inet_csk_accept
ci-upstream-net-this-kasan-gce 2021/12/09 00:01 net b5bd95d17102 a4a2a501 .config log report syz C general protection fault in inet_csk_accept
ci-upstream-net-this-kasan-gce 2021/12/08 23:41 net b5bd95d17102 a4a2a501 .config log report syz C general protection fault in inet_csk_accept
ci-upstream-net-kasan-gce 2021/12/08 23:33 net-next 150791442e7c a4a2a501 .config log report syz C general protection fault in inet_csk_accept
ci-upstream-net-kasan-gce 2021/12/08 22:52 net-next 150791442e7c a4a2a501 .config log report syz C general protection fault in inet_csk_accept
ci-upstream-kasan-gce-root 2021/12/08 22:31 upstream 2a987e65025e a4a2a501 .config log report info general protection fault in inet_csk_accept
ci-upstream-net-kasan-gce 2021/12/09 11:11 net-next 3a262c71d3e8 a4a2a501 .config log report info general protection fault in inet_csk_accept
ci-upstream-net-kasan-gce 2021/12/08 22:30 net-next 150791442e7c a4a2a501 .config log report info general protection fault in inet_csk_accept