syzbot


WARNING in do_proc_bulk
Status: upstream: reported C repro on 2021/05/02 20:00
Reported-by: syzbot+882a85c0c8ec4a3e2281@syzkaller.appspotmail.com
Fix commit: 4f2629ea67e7 USB: usbfs: Don't WARN about excessively large memory allocations
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: 94d, last: 90d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in proc_bulk (log)
Repro: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2021/05/04 00:47 18m stern@rowland.harvard.edu patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git d2b6f8a1 OK

Sample crash report:

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/05/03 10:24 upstream d2b6f8a17919 77e2b668 .config log report syz C WARNING in do_proc_bulk
ci-upstream-kasan-gce 2021/05/03 08:23 upstream d2b6f8a17919 77e2b668 .config log report info WARNING in do_proc_bulk
ci-upstream-kasan-gce 2021/04/28 19:49 upstream acd3d2859453 77e2b668 .config log report info WARNING in do_proc_bulk