syzbot


KMSAN: uninit-value in ppp_send_frame
Status: internal: reported C repro on 2022/01/03 11:22
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: 44073187990d ppp: ensure minimum packet size in ppp_write()
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: 28d, last: 20h43m
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in ppp_async_push (2) C 207 2d10h 48d 19/22 internal: reported C repro on 2021/12/07 14:26

Sample crash report:

Crashes (5):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kmsan-gce 2021/12/27 20:26 https://github.com/google/kmsan.git master 81c325bbf94e 5140bd58 .config log report syz C KMSAN: uninit-value in ppp_send_frame
ci-upstream-kmsan-gce 2022/01/24 06:44 https://github.com/google/kmsan.git master 85cfd6e539bd 214351e1 .config log report info KMSAN: uninit-value in ppp_send_frame
ci-upstream-kmsan-gce 2022/01/19 03:06 https://github.com/google/kmsan.git master fa3879a274df 731a2d23 .config log report info KMSAN: uninit-value in ppp_send_frame
ci-upstream-kmsan-gce 2021/12/27 19:28 https://github.com/google/kmsan.git master 81c325bbf94e 5140bd58 .config log report info KMSAN: uninit-value in ppp_send_frame
ci-upstream-kmsan-gce-386 2022/01/15 18:59 https://github.com/google/kmsan.git master fa3879a274df 723cfaf0 .config log report info KMSAN: uninit-value in ppp_send_frame