syzbot


KASAN: slab-out-of-bounds Read in __nla_put_nohdr
Status: fixed on 2020/02/18 14:31
Reported-by: syzbot+5af9a90dad568aa9f611@syzkaller.appspotmail.com
Fix commit: 61678d28d4a4 net_sched: fix datalen for ematch
First crash: 677d, last: 677d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: C syz .config
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 KASAN: slab-out-of-bounds Read in __nla_put_nohdr C done 2 671d 671d 1/1 fixed on 2020/02/27 08:36
linux-4.19 KASAN: slab-out-of-bounds Read in __nla_put_nohdr C done 1 670d 670d 1/1 fixed on 2020/02/28 16:14
Patch testing requests:
Created Duration User Patch Repo Result
2020/01/22 22:04 18m xiyou.wangcong@gmail.com https://github.com/congwang/linux.git net OK

Sample crash report:

Crashes (4):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2020/01/21 21:37 upstream d96d875ef5dd 8eda0b95 .config log report syz C
ci-upstream-kasan-gce-386 2020/01/21 17:18 upstream d96d875ef5dd 8eda0b95 .config log report syz C
ci-upstream-net-this-kasan-gce 2020/01/21 13:16 net 80892772c4ed 8eda0b95 .config log report syz C
ci-upstream-net-kasan-gce 2020/01/21 14:59 net-next 17e10a15a796 8eda0b95 .config log report syz C