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, 2 new issues were detected and 0 were fixed. In total, 15 issues are still open and 200 have been fixed so far. Some of the still happening issues: Ref Crashes Repro Title <1> 8166 Yes possible deadlock in task_fork_fair https://syzkaller.appspot.com/bug?extid=1a93ee5d329e97cfbaff <2> 21 Yes BUG: unable to handle kernel NULL pointer dereference in sk_msg_recvmsg https://syzkaller.appspot.com/bug?extid=84f695756ed0c4bb3aba <3> 19 Yes WARNING in __mark_chain_precision (3) https://syzkaller.appspot.com/bug?extid=4d6330e14407721955eb <4> 3 Yes INFO: rcu detected stall in sys_newfstatat (4) https://syzkaller.appspot.com/bug?extid=1c02a56102605204445c <5> 2 Yes UBSAN: shift-out-of-bounds in adjust_reg_min_max_vals https://syzkaller.appspot.com/bug?extid=46700eea57ecc7f84776 <6> 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.