[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.5' (ECDSA) to the list of known hosts.
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syzkaller login: [   66.107877][ T7173] nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based  firewall rule not found. Use the iptables CT target to attach helpers instead.
[   66.114159][ T7181] nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based  firewall rule not found. Use the iptables CT target to attach helpers instead.
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[   66.361230][ T7193] ------------[ cut here ]------------
[   66.366874][ T7193] WARNING: CPU: 0 PID: 7193 at net/kcm/kcmsock.c:628 kcm_write_msgs+0x1079/0x1320
[   66.376068][ T7193] Kernel panic - not syncing: panic_on_warn set ...
[   66.382747][ T7193] CPU: 0 PID: 7193 Comm: syz-executor138 Not tainted 5.7.0-rc2-syzkaller #0
[   66.391417][ T7193] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   66.401605][ T7193] Call Trace:
[   66.404914][ T7193]  dump_stack+0x1e9/0x30e
[   66.409273][ T7193]  panic+0x264/0x7a0
[   66.413170][ T7193]  ? __warn+0x102/0x210
[   66.417323][ T7193]  ? kcm_write_msgs+0x1079/0x1320
[   66.422334][ T7193]  __warn+0x209/0x210
[   66.426314][ T7193]  ? kcm_write_msgs+0x1079/0x1320
[   66.431342][ T7193]  report_bug+0x1ac/0x2d0
[   66.435684][ T7193]  do_error_trap+0xca/0x1c0
[   66.440206][ T7193]  do_invalid_op+0x32/0x40
[   66.444629][ T7193]  ? kcm_write_msgs+0x1079/0x1320
[   66.449675][ T7193]  invalid_op+0x23/0x30
[   66.453826][ T7193] RIP: 0010:kcm_write_msgs+0x1079/0x1320
[   66.459446][ T7193] Code: 6c 24 14 89 ee e8 77 d3 05 fa 85 ed 44 0f 45 ed 44 89 e8 48 81 c4 b0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 b7 cf 05 fa <0f> 0b 41 bd ea ff ff ff e9 4f ff ff ff e8 a5 cf 05 fa 0f 0b e9 0f
[   66.479048][ T7193] RSP: 0018:ffffc900016f7a60 EFLAGS: 00010293
[   66.485107][ T7193] RAX: ffffffff876d91d9 RBX: ffff8880a29eacc0 RCX: ffff8880887d8600
[   66.493071][ T7193] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[   66.501231][ T7193] RBP: 0000000000000000 R08: ffffffff876d89ec R09: fffffbfff16292b6
[   66.509205][ T7193] R10: fffffbfff16292b6 R11: 0000000000000000 R12: dffffc0000000000
[   66.517266][ T7193] R13: 0000000000008000 R14: ffff8880a2da4080 R15: 0000000000110000
[   66.525321][ T7193]  ? kcm_write_msgs+0x88c/0x1320
[   66.530457][ T7193]  ? kcm_write_msgs+0x1079/0x1320
[   66.535525][ T7193]  kcm_sendmsg+0x1b5e/0x2170
[   66.540124][ T7193]  ? __lock_acquire+0x116c/0x2c30
[   66.545144][ T7193]  ? smack_socket_sendmsg+0x100/0x450
[   66.550508][ T7193]  ? tomoyo_socket_sendmsg_permission+0x217/0x320
[   66.556924][ T7193]  ? kcm_getsockopt+0x230/0x230
[   66.561770][ T7193]  sock_write_iter+0x2b4/0x3d0
[   66.566548][ T7193]  __vfs_write+0x54c/0x710
[   66.570982][ T7193]  vfs_write+0x274/0x580
[   66.575218][ T7193]  ksys_write+0x11b/0x220
[   66.579538][ T7193]  ? do_syscall_64+0x19/0x1b0
[   66.584313][ T7193]  do_syscall_64+0xf3/0x1b0
[   66.588811][ T7193]  entry_SYSCALL_64_after_hwframe+0x49/0xb3
[   66.594717][ T7193] RIP: 0033:0x447039
[   66.598687][ T7193] Code: e8 dc e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00
[   66.618290][ T7193] RSP: 002b:00007f31c264ad98 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   66.626697][ T7193] RAX: ffffffffffffffda RBX: 00000000006dcc48 RCX: 0000000000447039
[   66.634664][ T7193] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
[   66.643324][ T7193] RBP: 00000000006dcc40 R08: 0000000000000000 R09: 0000000000000000
[   66.651291][ T7193] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc4c
[   66.659253][ T7193] R13: 00000000200003c0 R14: 00000000004af628 R15: 000000000000d4f5
[   66.668512][ T7193] Kernel Offset: disabled
[   66.672894][ T7193] Rebooting in 86400 seconds..