syzbot


WARNING in new_slab
Status: internal: reported C repro on 2021/12/21 01:08
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: c12837d1bb31 ref_tracker: use __GFP_NOFAIL more carefully
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: 37d, last: 7d13h

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: INFO: rcu detected stall in br_ip6_multicast_query_expired (log)
Repro: C syz .config

Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-net-kasan-gce 2021/12/21 01:07 net-next 4b430f5c9680 62bd192b .config log report syz C WARNING in new_slab
ci-qemu-upstream-386 2022/01/20 07:59 upstream 1d1df41c5a33 5da9499f .config log report info WARNING in new_slab