syzbot


WARNING in mptcp_sendmsg_frag
Status: upstream: reported C repro on 2021/09/15 04:05
Reported-by: syzbot+263a248eec3e875baa7b@syzkaller.appspotmail.com
Fix commit: efe686ffce01 mptcp: ensure tx skbs always have the MPTCP ext mptcp: ensure tx skbs always have the MPTCP ext
Patched on: [ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-smack-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce], missing on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-linux-next-kasan-gce-root ci2-upstream-kcsan-gce ci2-upstream-usb]
First crash: 81d, last: 70d

Cause bisection: the cause commit could be any of (bisect log):
  0ee50b47532a namei: change filename_parentat() calling conventions
  584d3226d665 namei: make do_mkdirat() take struct filename
Patch testing requests:
Created Duration User Patch Repo Result
2021/09/22 10:33 18m pabeni@redhat.com patch upstream OK
2021/09/21 17:39 10m pabeni@redhat.com patch upstream report log
2021/09/21 10:00 12m pabeni@redhat.com https://github.com/multipath-tcp/mptcp_net-next.git export OK
2021/09/20 16:53 10m pabeni@redhat.com patch upstream report log

Sample crash report:

Crashes (6):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-net-this-kasan-gce 2021/09/18 11:49 net 02319bf15acf 70b76c1d .config log report syz C WARNING in mptcp_sendmsg_frag
ci-upstream-net-kasan-gce 2021/09/18 12:23 net-next 0efcc3f20145 70b76c1d .config log report syz C WARNING in mptcp_sendmsg_frag
ci-upstream-kasan-gce-smack-root 2021/09/22 01:46 upstream 92477dd1faa6 169724fe .config log report info WARNING in mptcp_sendmsg_frag
ci-upstream-kasan-gce 2021/09/13 06:46 upstream f306b90c69ce 5ae8508a .config log report info WARNING in mptcp_sendmsg_frag
ci-upstream-kasan-gce-root 2021/09/11 04:03 upstream 926de8c4326c 5ae8508a .config log report info WARNING in mptcp_sendmsg_frag
ci-upstream-net-this-kasan-gce 2021/09/18 11:24 net 02319bf15acf 70b76c1d .config log report info WARNING in mptcp_sendmsg_frag