[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 80.230351][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 80.230365][ T27] audit: type=1800 audit(1582634033.099:29): pid=9983 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 80.257398][ T27] audit: type=1800 audit(1582634033.099:30): pid=9983 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 91.792342][T10134] ------------[ cut here ]------------ [ 91.797992][T10134] WARNING: CPU: 1 PID: 10134 at net/core/stream.c:208 sk_stream_kill_queues+0x40d/0x590 [ 91.807724][T10134] Kernel panic - not syncing: panic_on_warn set ... [ 91.814317][T10134] CPU: 1 PID: 10134 Comm: syz-executor751 Not tainted 5.6.0-rc3-syzkaller #0 [ 91.823067][T10134] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.833402][T10134] Call Trace: [ 91.836691][T10134] dump_stack+0x197/0x210 [ 91.841038][T10134] ? sk_stream_kill_queues+0x350/0x590 [ 91.846889][T10134] panic+0x2e3/0x75c [ 91.851557][T10134] ? add_taint.cold+0x16/0x16 [ 91.856251][T10134] ? printk+0xba/0xed [ 91.860274][T10134] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 91.865754][T10134] ? __warn.cold+0x14/0x3e [ 91.870346][T10134] ? __warn+0xd9/0x1cf [ 91.874427][T10134] ? sk_stream_kill_queues+0x40d/0x590 [ 91.879981][T10134] __warn.cold+0x2f/0x3e [ 91.884415][T10134] ? report_bug.cold+0x63/0xb2 [ 91.889249][T10134] ? sk_stream_kill_queues+0x40d/0x590 [ 91.894731][T10134] report_bug+0x289/0x300 [ 91.899118][T10134] do_error_trap+0x11b/0x200 [ 91.903776][T10134] do_invalid_op+0x37/0x50 [ 91.908265][T10134] ? sk_stream_kill_queues+0x40d/0x590 [ 91.914182][T10134] invalid_op+0x23/0x30 [ 91.918517][T10134] RIP: 0010:sk_stream_kill_queues+0x40d/0x590 [ 91.924657][T10134] Code: 48 c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 41 44 8b a3 f8 01 00 00 e9 5f ff ff ff e8 9c 3e 40 fb 0f 0b eb 96 e8 93 3e 40 fb <0f> 0b eb a1 e8 8a 3e 40 fb 0f 0b e9 9f fe ff ff 4c 89 ef e8 0b e4 [ 91.944524][T10134] RSP: 0018:ffffc9000623fb30 EFLAGS: 00010293 [ 91.950586][T10134] RAX: ffff88809592a400 RBX: 0000000000000000 RCX: ffffffff8635485d [ 91.958838][T10134] RDX: 0000000000000000 RSI: ffffffff863548bd RDI: 0000000000000005 [ 91.966821][T10134] RBP: ffffc9000623fb70 R08: ffff88809592a400 R09: ffffed1015d2707c [ 91.974812][T10134] R10: ffffed1015d2707b R11: ffff8880ae9383db R12: 0000000000000fe3 [ 91.982790][T10134] R13: ffff88809f854eb8 R14: ffffffff8c406240 R15: ffff88809f854df8 [ 91.990817][T10134] ? sk_stream_kill_queues+0x3ad/0x590 [ 91.996283][T10134] ? sk_stream_kill_queues+0x40d/0x590 [ 92.001843][T10134] inet_csk_destroy_sock+0x1b7/0x4c0 [ 92.007155][T10134] tcp_close+0xe17/0x12b0 [ 92.011500][T10134] inet_release+0xed/0x200 [ 92.015997][T10134] __sock_release+0xce/0x280 [ 92.020603][T10134] sock_close+0x1e/0x30 [ 92.024924][T10134] __fput+0x2ff/0x890 [ 92.028915][T10134] ? __sock_release+0x280/0x280 [ 92.033855][T10134] ____fput+0x16/0x20 [ 92.037935][T10134] task_work_run+0x145/0x1c0 [ 92.042570][T10134] do_exit+0xba9/0x2f50 [ 92.046802][T10134] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.053059][T10134] ? mm_update_next_owner+0x7c0/0x7c0 [ 92.058624][T10134] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 92.064714][T10134] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.070202][T10134] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.075673][T10134] do_group_exit+0x135/0x360 [ 92.080286][T10134] __x64_sys_exit_group+0x44/0x50 [ 92.085405][T10134] do_syscall_64+0xfa/0x790 [ 92.089916][T10134] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.095806][T10134] RIP: 0033:0x43eff8 [ 92.099709][T10134] Code: Bad RIP value. [ 92.103787][T10134] RSP: 002b:00007ffd71face08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 92.112296][T10134] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043eff8 [ 92.120266][T10134] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 92.128243][T10134] RBP: 00000000004be808 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 92.136351][T10134] R10: 00000000200001c0 R11: 0000000000000246 R12: 0000000000000001 [ 92.144325][T10134] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 92.153562][T10134] Kernel Offset: disabled [ 92.158146][T10134] Rebooting in 86400 seconds..