[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 74.102857][ T8372] skbuff: skb_over_panic: text:ffffffff8717de50 len:692 put:3 head:ffff888025f6f000 data:ffff888025f6f00e tail:0x2c2 end:0x2c0 dev:bond0
[ 74.118062][ T8372] ------------[ cut here ]------------
[ 74.124368][ T8372] kernel BUG at net/core/skbuff.c:109!
[ 74.129870][ T8372] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[ 74.135945][ T8372] CPU: 1 PID: 8372 Comm: syz-executor543 Not tainted 5.12.0-rc4-syzkaller #0
[ 74.144713][ T8372] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 74.154970][ T8372] RIP: 0010:skb_panic+0x16c/0x16e
[ 74.160003][ T8372] Code: f8 4c 8b 4c 24 10 8b 4b 70 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 40 b2 65 8a ff 74 24 10 ff 74 24 20 e8 e7 c0 c4 ff <0f> 0b e8 d2 e0 75 f8 4c 8b 64 24 18 e8 c8 87 b9 f8 48 c7 c1 80 be
[ 74.179620][ T8372] RSP: 0018:ffffc9000132f7b8 EFLAGS: 00010282
[ 74.185682][ T8372] RAX: 0000000000000086 RBX: ffff888012a91140 RCX: 0000000000000000
[ 74.193809][ T8372] RDX: ffff888021d6d4c0 RSI: ffffffff815c4d75 RDI: fffff52000265ee9
[ 74.201763][ T8372] RBP: ffffffff8a65bec0 R08: 0000000000000086 R09: 0000000000000000
[ 74.209719][ T8372] R10: ffffffff815bdb0e R11: 0000000000000000 R12: ffffffff8717de50
[ 74.217699][ T8372] R13: 0000000000000003 R14: ffff88801aa24000 R15: 00000000000002c0
[ 74.225804][ T8372] FS: 0000000001d53300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
[ 74.234848][ T8372] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 74.241435][ T8372] CR2: 000055acdca69398 CR3: 0000000020a7b000 CR4: 00000000001506e0
[ 74.249408][ T8372] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 74.257643][ T8372] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 74.265733][ T8372] Call Trace:
[ 74.269015][ T8372] ? llc_sap_action_send_xid_c+0x240/0x380
[ 74.274820][ T8372] ? llc_sap_action_send_ui+0x2c0/0x2c0
[ 74.280376][ T8372] skb_put.cold+0x24/0x24
[ 74.284730][ T8372] llc_sap_action_send_xid_c+0x240/0x380
[ 74.290362][ T8372] llc_sap_state_process+0x22a/0x4f0
[ 74.295660][ T8372] llc_ui_sendmsg+0x9ee/0x1040
[ 74.300414][ T8372] ? llc_ui_bind+0xd20/0xd20
[ 74.305117][ T8372] ? aa_af_perm+0x230/0x230
[ 74.309627][ T8372] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70
[ 74.315866][ T8372] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70
[ 74.322878][ T8372] ? llc_ui_bind+0xd20/0xd20
[ 74.327452][ T8372] sock_sendmsg+0xcf/0x120
[ 74.331856][ T8372] ____sys_sendmsg+0x331/0x810
[ 74.336614][ T8372] ? kernel_sendmsg+0x50/0x50
[ 74.341293][ T8372] ? do_recvmmsg+0x6d0/0x6d0
[ 74.345883][ T8372] ? lockdep_hardirqs_on_prepare+0x400/0x400
[ 74.354030][ T8372] ___sys_sendmsg+0xf3/0x170
[ 74.358616][ T8372] ? sendmsg_copy_msghdr+0x160/0x160
[ 74.364065][ T8372] ? lock_chain_count+0x20/0x20
[ 74.368925][ T8372] ? lock_chain_count+0x20/0x20
[ 74.373787][ T8372] ? llc_ui_connect+0x4fb/0xcb0
[ 74.379172][ T8372] ? lock_downgrade+0x6e0/0x6e0
[ 74.384053][ T8372] ? rwlock_bug.part.0+0x90/0x90
[ 74.388999][ T8372] ? __local_bh_enable_ip+0xa0/0x120
[ 74.394278][ T8372] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70
[ 74.400520][ T8372] ? __fget_light+0x215/0x280
[ 74.405203][ T8372] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70
[ 74.411456][ T8372] __sys_sendmmsg+0x195/0x470
[ 74.416122][ T8372] ? __ia32_sys_sendmsg+0xb0/0xb0
[ 74.421402][ T8372] ? lockdep_hardirqs_on_prepare+0x400/0x400
[ 74.427407][ T8372] ? find_held_lock+0x2d/0x110
[ 74.432163][ T8372] ? __context_tracking_exit+0xb8/0xe0
[ 74.437607][ T8372] ? lock_downgrade+0x6e0/0x6e0
[ 74.442448][ T8372] __x64_sys_sendmmsg+0x99/0x100
[ 74.448508][ T8372] ? syscall_enter_from_user_mode+0x27/0x70
[ 74.454674][ T8372] do_syscall_64+0x2d/0x70
[ 74.459084][ T8372] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 74.465226][ T8372] RIP: 0033:0x43f329
[ 74.469195][ T8372] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 74.488802][ T8372] RSP: 002b:00007ffc10253fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
[ 74.497206][ T8372] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043f329
[ 74.505160][ T8372] RDX: 0000000000000006 RSI: 0000000020005bc0 RDI: 0000000000000003
[ 74.513134][ T8372] RBP: 0000000000403310 R08: 0000000000400488 R09: 0000000000400488
[ 74.521267][ T8372] R10: 0000000004000000 R11: 0000000000000246 R12: 00000000004033a0
[ 74.529237][ T8372] R13: 0000000000000000 R14: 00000000004ad018 R15: 0000000000400488
[ 74.537206][ T8372] Modules linked in:
[ 74.541777][ T8372] ---[ end trace 4d95aeb9a24efeaa ]---
[ 74.547299][ T8372] RIP: 0010:skb_panic+0x16c/0x16e
[ 74.552385][ T8372] Code: f8 4c 8b 4c 24 10 8b 4b 70 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 40 b2 65 8a ff 74 24 10 ff 74 24 20 e8 e7 c0 c4 ff <0f> 0b e8 d2 e0 75 f8 4c 8b 64 24 18 e8 c8 87 b9 f8 48 c7 c1 80 be
[ 74.572631][ T8372] RSP: 0018:ffffc9000132f7b8 EFLAGS: 00010282
[ 74.578719][ T8372] RAX: 0000000000000086 RBX: ffff888012a91140 RCX: 0000000000000000
[ 74.586964][ T8372] RDX: ffff888021d6d4c0 RSI: ffffffff815c4d75 RDI: fffff52000265ee9
[ 74.595063][ T8372] RBP: ffffffff8a65bec0 R08: 0000000000000086 R09: 0000000000000000
[ 74.603201][ T8372] R10: ffffffff815bdb0e R11: 0000000000000000 R12: ffffffff8717de50
[ 74.611209][ T8372] R13: 0000000000000003 R14: ffff88801aa24000 R15: 00000000000002c0
[ 74.619271][ T8372] FS: 0000000001d53300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
[ 74.628278][ T8372] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 74.634921][ T8372] CR2: 000055acdca69398 CR3: 0000000020a7b000 CR4: 00000000001506e0
[ 74.642938][ T8372] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 74.651178][ T8372] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 74.659228][ T8372] Kernel panic - not syncing: Fatal exception
[ 74.665762][ T8372] Kernel Offset: disabled
[ 74.670182][ T8372] Rebooting in 86400 seconds..