syzbot


INFO: task hung in do_proc_bulk
Status: upstream: reported syz repro on 2021/08/28 15:52
Reported-by: syzbot+ada0f7d3d9fd2016d927@syzkaller.appspotmail.com
Fix commit: ae8709b296d8 USB: core: Make do_proc_control() and do_proc_bulk() killable
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: 148d, last: 29d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: INFO: task hung in usb_bulk_msg (log)
Repro: syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2021/09/02 20:04 17m stern@rowland.harvard.edu patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git d5ae8d7f85b7 OK
2021/08/28 18:04 24m stern@rowland.harvard.edu patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git d5ae8d7f85b7 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-smack-root 2021/08/24 15:47 upstream d5ae8d7f85b7 b599f2fc .config log report syz INFO: task hung in do_proc_bulk
ci-upstream-kasan-gce-smack-root 2021/11/01 19:32 upstream 8bb7eca972ad 098b5d53 .config log report info INFO: task hung in do_proc_bulk
ci-upstream-kasan-gce-smack-root 2021/10/31 08:02 upstream 119c85055d86 098b5d53 .config log report info INFO: task hung in do_proc_bulk
ci-upstream-kasan-gce-smack-root 2021/10/23 15:19 upstream 9c0c4d24ac00 282f03fb .config log report info INFO: task hung in do_proc_bulk
ci-upstream-kasan-gce-smack-root 2021/09/27 03:25 upstream 996148ee05d0 78494d16 .config log report info INFO: task hung in do_proc_bulk
ci-upstream-kasan-gce-smack-root 2021/09/06 07:31 upstream 0319b848b155 d236a457 .config log report info INFO: task hung in do_proc_bulk
ci-upstream-kasan-gce-smack-root 2021/08/16 13:28 upstream 7c60610d4767 33c26cb7 .config log report info INFO: task hung in do_proc_bulk
ci-upstream-kasan-gce-smack-root 2021/07/06 13:17 upstream 3dbdb38e2869 6c4484eb .config log report info INFO: task hung in do_proc_bulk