[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 60.594485][ T27] audit: type=1800 audit(1559864159.101:25): pid=8793 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 60.634075][ T27] audit: type=1800 audit(1559864159.101:26): pid=8793 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 60.683375][ T27] audit: type=1800 audit(1559864159.101:27): pid=8793 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.791430][ T8945] kasan: CONFIG_KASAN_INLINE enabled [ 70.797300][ T8945] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 70.805769][ T8945] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 70.812724][ T8945] CPU: 1 PID: 8945 Comm: syz-executor900 Not tainted 5.2.0-rc2+ #18 [ 70.820679][ T8945] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.830749][ T8945] RIP: 0010:tcp_v6_send_reset+0x1e2/0x10c0 [ 70.836535][ T8945] Code: 46 fb 4d 85 ff 0f 85 00 04 00 00 e8 68 4e 46 fb 49 83 e5 fe e8 5f 4e 46 fb 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 92 0d 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b [ 70.856126][ T8945] RSP: 0018:ffff8880867dfa00 EFLAGS: 00010246 [ 70.862170][ T8945] RAX: dffffc0000000000 RBX: ffff88809780ca50 RCX: ffffffff862a574a [ 70.870146][ T8945] RDX: 0000000000000000 RSI: ffffffff862a5761 RDI: 0000000000000007 [ 70.878106][ T8945] RBP: ffff8880867dfab8 R08: ffff888098500500 R09: ffffed1010cfbf05 [ 70.886059][ T8945] R10: ffff8880867dfac8 R11: 0000000000000003 R12: ffff888095a7ae20 [ 70.894017][ T8945] R13: 0000000000000000 R14: ffff88809780c940 R15: 0000000000000000 [ 70.901999][ T8945] FS: 0000555555d82880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 70.910914][ T8945] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.917479][ T8945] CR2: 0000000020000208 CR3: 0000000008a6d000 CR4: 00000000001406e0 [ 70.925429][ T8945] Call Trace: [ 70.928717][ T8945] ? tcp_v6_send_response+0x1f80/0x1f80 [ 70.934249][ T8945] ? __local_bh_enable_ip+0x15a/0x270 [ 70.939605][ T8945] ? _raw_spin_unlock_bh+0x31/0x40 [ 70.944706][ T8945] ? __local_bh_enable_ip+0x15a/0x270 [ 70.950060][ T8945] tcp_v6_do_rcv+0xe7b/0x12c0 [ 70.954729][ T8945] __release_sock+0x129/0x390 [ 70.959382][ T8945] tcp_close+0x6b3/0x10c0 [ 70.963698][ T8945] ? ip_mc_drop_socket+0x211/0x270 [ 70.968796][ T8945] inet_release+0xe0/0x1f0 [ 70.973197][ T8945] inet6_release+0x53/0x80 [ 70.977615][ T8945] __sock_release+0xce/0x2a0 [ 70.982182][ T8945] sock_close+0x1b/0x30 [ 70.986321][ T8945] __fput+0x2ff/0x890 [ 70.990406][ T8945] ? __sock_release+0x2a0/0x2a0 [ 70.995257][ T8945] ____fput+0x16/0x20 [ 70.999220][ T8945] task_work_run+0x145/0x1c0 [ 71.003791][ T8945] do_exit+0x90a/0x2fa0 [ 71.007932][ T8945] ? __ia32_sys_socketpair+0x31/0xf0 [ 71.013196][ T8945] ? mm_update_next_owner+0x640/0x640 [ 71.018554][ T8945] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 71.024777][ T8945] ? debug_smp_processor_id+0x3c/0x280 [ 71.030225][ T8945] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 71.035665][ T8945] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 71.041122][ T8945] do_group_exit+0x135/0x370 [ 71.045701][ T8945] __x64_sys_exit_group+0x44/0x50 [ 71.050714][ T8945] do_syscall_64+0xfd/0x680 [ 71.055205][ T8945] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.061076][ T8945] RIP: 0033:0x43ef58 [ 71.064957][ T8945] Code: Bad RIP value. [ 71.069004][ T8945] RSP: 002b:00007ffe1a7c37a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 71.077402][ T8945] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ef58 [ 71.085356][ T8945] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 71.093323][ T8945] RBP: 00000000004be768 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 71.101282][ T8945] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000001 [ 71.109237][ T8945] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 71.117198][ T8945] Modules linked in: [ 71.123305][ T8945] ---[ end trace 6a4ec77957a7cdf4 ]--- [ 71.128932][ T8945] RIP: 0010:tcp_v6_send_reset+0x1e2/0x10c0 [ 71.134772][ T8945] Code: 46 fb 4d 85 ff 0f 85 00 04 00 00 e8 68 4e 46 fb 49 83 e5 fe e8 5f 4e 46 fb 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 92 0d 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b [ 71.154412][ T8945] RSP: 0018:ffff8880867dfa00 EFLAGS: 00010246 [ 71.160464][ T8945] RAX: dffffc0000000000 RBX: ffff88809780ca50 RCX: ffffffff862a574a [ 71.168665][ T8945] RDX: 0000000000000000 RSI: ffffffff862a5761 RDI: 0000000000000007 [ 71.176677][ T8945] RBP: ffff8880867dfab8 R08: ffff888098500500 R09: ffffed1010cfbf05 [ 71.184698][ T8945] R10: ffff8880867dfac8 R11: 0000000000000003 R12: ffff888095a7ae20 [ 71.192672][ T8945] R13: 0000000000000000 R14: ffff88809780c940 R15: 0000000000000000 [ 71.200691][ T8945] FS: 0000555555d82880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 71.209664][ T8945] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.216303][ T8945] CR2: 000000000043ef2e CR3: 0000000008a6d000 CR4: 00000000001406e0 [ 71.224301][ T8945] Kernel panic - not syncing: Fatal exception [ 71.231420][ T8945] Kernel Offset: disabled [ 71.235772][ T8945] Rebooting in 86400 seconds..