[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.15' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 38.925638] skbuff: skb_over_panic: text:00000000c92f54a8 len:692 put:3 head:000000005cc5597c data:000000000b0572a2 tail:0x2c2 end:0x2c0 dev:bond0 [ 38.939623] ------------[ cut here ]------------ [ 38.944398] kernel BUG at net/core/skbuff.c:104! [ 38.949719] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 38.955190] CPU: 1 PID: 8074 Comm: syz-executor352 Not tainted 4.19.190-syzkaller #0 [ 38.963276] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.972631] RIP: 0010:skb_panic+0x172/0x174 [ 38.976950] Code: 4c 24 10 8b 8b 80 00 00 00 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 20 02 4c 89 ff 74 24 10 ff 74 24 20 e8 46 1d e2 ff <0f> 0b e8 1a 15 52 f9 4c 8b 64 24 18 e8 00 bf 87 f9 48 c7 c1 80 0b [ 38.995921] RSP: 0018:ffff888096627828 EFLAGS: 00010282 [ 39.001271] RAX: 0000000000000086 RBX: ffff8880aebef300 RCX: 0000000000000000 [ 39.008532] RDX: 0000000000000000 RSI: ffffffff814dde61 RDI: ffffed1012cc4ef7 [ 39.015926] RBP: ffffffff894c0bc0 R08: 0000000000000086 R09: 0000000000000000 [ 39.023210] R10: 0000000000000005 R11: 0000000000000000 R12: ffffffff868716ec [ 39.030724] R13: 0000000000000003 R14: ffff8880abd84480 R15: 00000000000002c0 [ 39.037978] FS: 000000000121b300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 39.046706] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.052576] CR2: 00007f3ea0ab76c0 CR3: 00000000abacf000 CR4: 00000000001406e0 [ 39.059843] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.067095] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.074444] Call Trace: [ 39.077020] ? llc_sap_action_send_xid_c+0x23c/0x300 [ 39.082128] ? llc_sap_action_send_ui+0x250/0x250 [ 39.086954] skb_put.cold+0x24/0x24 [ 39.090563] llc_sap_action_send_xid_c+0x23c/0x300 [ 39.095475] llc_sap_state_process+0x220/0x4e0 [ 39.100038] llc_ui_sendmsg+0x9d1/0xfd0 [ 39.104008] ? llc_ui_connect+0xc20/0xc20 [ 39.108139] ? aa_af_perm+0x230/0x230 [ 39.112104] ? kernel_recvmsg+0x220/0x220 [ 39.116249] ? llc_ui_connect+0xc20/0xc20 [ 39.120501] sock_sendmsg+0xc3/0x120 [ 39.124200] ___sys_sendmsg+0x3b3/0x8e0 [ 39.128177] ? copy_msghdr_from_user+0x440/0x440 [ 39.132918] ? mark_held_locks+0xf0/0xf0 [ 39.136968] ? reacquire_held_locks+0xb5/0x430 [ 39.141593] ? release_sock+0x1b/0x1b0 [ 39.145491] ? llc_ui_connect+0x4ec/0xc20 [ 39.149624] ? lock_downgrade+0x720/0x720 [ 39.153763] ? __local_bh_enable_ip+0x159/0x270 [ 39.158412] ? __fdget+0x1a0/0x230 [ 39.161934] __sys_sendmmsg+0x195/0x470 [ 39.165900] ? __ia32_sys_sendmsg+0x220/0x220 [ 39.170393] ? llc_ui_autobind.isra.0+0x430/0x430 [ 39.175218] ? __sys_connect+0x140/0x2c0 [ 39.179273] ? __ia32_sys_accept+0xb0/0xb0 [ 39.183491] ? up_read+0x17/0x110 [ 39.186950] ? __do_page_fault+0x180/0xd60 [ 39.191180] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.196525] __x64_sys_sendmmsg+0x99/0x100 [ 39.200739] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 39.205303] do_syscall_64+0xf9/0x620 [ 39.209103] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.214721] RIP: 0033:0x43f319 [ 39.217901] 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 [ 39.236883] RSP: 002b:00007ffffdd414c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 39.244585] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043f319 [ 39.251834] RDX: 0000000000000006 RSI: 0000000020005bc0 RDI: 0000000000000003 [ 39.259084] RBP: 0000000000403300 R08: 0000000000400488 R09: 0000000000400488 [ 39.266333] R10: 0000000004000000 R11: 0000000000000246 R12: 0000000000403390 [ 39.273596] R13: 0000000000000000 R14: 00000000004ad018 R15: 0000000000400488 [ 39.280849] Modules linked in: [ 39.285042] ---[ end trace dd0ae08fb19069b6 ]--- [ 39.289818] RIP: 0010:skb_panic+0x172/0x174 [ 39.294139] Code: 4c 24 10 8b 8b 80 00 00 00 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 20 02 4c 89 ff 74 24 10 ff 74 24 20 e8 46 1d e2 ff <0f> 0b e8 1a 15 52 f9 4c 8b 64 24 18 e8 00 bf 87 f9 48 c7 c1 80 0b [ 39.313422] RSP: 0018:ffff888096627828 EFLAGS: 00010282 [ 39.318923] RAX: 0000000000000086 RBX: ffff8880aebef300 RCX: 0000000000000000 [ 39.326432] RDX: 0000000000000000 RSI: ffffffff814dde61 RDI: ffffed1012cc4ef7 [ 39.333699] RBP: ffffffff894c0bc0 R08: 0000000000000086 R09: 0000000000000000 [ 39.341092] R10: 0000000000000005 R11: 0000000000000000 R12: ffffffff868716ec [ 39.348508] R13: 0000000000000003 R14: ffff8880abd84480 R15: 00000000000002c0 [ 39.355891] FS: 000000000121b300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 39.364117] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.370136] CR2: 00007f3ea0ab76c0 CR3: 00000000abacf000 CR4: 00000000001406e0 [ 39.377558] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.384892] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.392299] Kernel panic - not syncing: Fatal exception [ 39.398481] Kernel Offset: disabled [ 39.402164] Rebooting in 86400 seconds..