Hello bpf maintainers/developers, This is a 31-day syzbot report for the bpf subsystem. All related reports/information can be found at: https://syzkaller.appspot.com/upstream/s/bpf During the period, 4 new issues were detected and 0 were fixed. In total, 10 issues are still open and 199 have been fixed so far. Some of the still happening issues: Ref Crashes Repro Title <1> 14 Yes BUG: unable to handle kernel NULL pointer dereference in sk_msg_recvmsg https://syzkaller.appspot.com/bug?extid=84f695756ed0c4bb3aba <2> 2 Yes INFO: rcu detected stall in sys_newfstatat (4) https://syzkaller.appspot.com/bug?extid=1c02a56102605204445c <3> 1 Yes INFO: rcu detected stall in sys_unshare (9) https://syzkaller.appspot.com/bug?extid=872bccd9a68c6ba47718 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. To disable reminders for individual bugs, reply with the following command: #syz set <Ref> no-reminders To change bug's subsystems, reply with: #syz set <Ref> subsystems: new-subsystem You may send multiple commands in a single email message.