syzbot


possible deadlock in sctp_addr_wq_timeout_handler
Status: upstream: reported C repro on 2021/04/30 19:18
Reported-by: syzbot+959223586843e69a2674@syzkaller.appspotmail.com
Fix commit: 01bfe5e8e428 Revert "net/sctp: fix race condition in sctp_destroy_sock"
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 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 ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 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-arm32]
First crash: 99d, last: 92d

Cause bisection: introduced by (bisect log) :
commit 997acaf6b4b59c6a9c259740312a69ea549cc684
Author: Mark Rutland <mark.rutland@arm.com>
Date: Mon Jan 11 15:37:07 2021 +0000

  lockdep: report broken irq restoration

Crash: WARNING in kvm_wait (log)
Repro: C syz .config
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 possible deadlock in sctp_addr_wq_timeout_handler 1 94d 94d 0/1 upstream: reported on 2021/04/28 12:08

Sample crash report:

Crashes (8):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/04/25 15:53 upstream 2a1d7946fa53 36c88236 .config log report syz C possible deadlock in sctp_addr_wq_timeout_handler
ci-upstream-net-kasan-gce 2021/04/28 03:12 net-next 95aafe911db6 805b5003 .config log report syz possible deadlock in sctp_addr_wq_timeout_handler
ci-upstream-kasan-gce-smack-root 2021/04/29 21:09 upstream d2b6f8a17919 77e2b668 .config log report info possible deadlock in sctp_addr_wq_timeout_handler
ci-upstream-kasan-gce 2021/04/25 13:52 upstream 2a1d7946fa53 36c88236 .config log report info possible deadlock in sctp_addr_wq_timeout_handler
ci-upstream-net-this-kasan-gce 2021/04/30 03:04 net bbd6f0a94813 77e2b668 .config log report info possible deadlock in sctp_addr_wq_timeout_handler
ci-upstream-net-this-kasan-gce 2021/04/23 16:35 net bb556de79f0a 17f0b706 .config log report info possible deadlock in sctp_addr_wq_timeout_handler
ci-upstream-net-kasan-gce 2021/05/01 05:43 net-next 95aafe911db6 77e2b668 .config log report info possible deadlock in sctp_addr_wq_timeout_handler
ci-upstream-net-kasan-gce 2021/04/24 05:14 net-next b2f0ca00e6b3 17f0b706 .config log report info possible deadlock in sctp_addr_wq_timeout_handler