------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:109! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 11650 Comm: syz-executor.2 Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:109 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 80 de 65 8a ff 74 24 10 ff 74 24 20 e8 e3 c2 c4 ff <0f> 0b e8 5e 67 72 f8 4c 8b 64 24 18 e8 24 6c b6 f8 48 c7 c1 c0 ea RSP: 0018:ffffc900017ef7b8 EFLAGS: 00010282 RAX: 0000000000000086 RBX: ffff888014ccd640 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815c5205 RDI: fffff520002fdee9 RBP: ffffffff8a65eb00 R08: 0000000000000086 R09: 0000000000000000 R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffffffff8718af60 R13: 0000000000000003 R14: ffff888019704000 R15: 00000000000002c0 FS: 00007f446c4e9700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6420f81740 CR3: 0000000028c83000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic net/core/skbuff.c:114 [inline] skb_put.cold+0x24/0x24 net/core/skbuff.c:1914 llc_pdu_init_as_xid_cmd include/net/llc_pdu.h:377 [inline] llc_sap_action_send_xid_c+0x240/0x380 net/llc/llc_s_ac.c:84 llc_exec_sap_trans_actions net/llc/llc_sap.c:153 [inline] llc_sap_next_state net/llc/llc_sap.c:182 [inline] llc_sap_state_process+0x22a/0x4f0 net/llc/llc_sap.c:209 llc_ui_sendmsg+0x9ee/0x1040 net/llc/af_llc.c:964 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x331/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmmsg+0x195/0x470 net/socket.c:2490 __do_sys_sendmmsg net/socket.c:2519 [inline] __se_sys_sendmmsg net/socket.c:2516 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2516 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x466459 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f446c4e9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000466459 RDX: 0000000000000006 RSI: 0000000020005bc0 RDI: 0000000000000005 RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000 R10: 0000000004000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007ffc521648ff R14: 00007f446c4e9300 R15: 0000000000022000 Modules linked in: ---[ end trace cd8f91554fd78061 ]--- RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:109 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 80 de 65 8a ff 74 24 10 ff 74 24 20 e8 e3 c2 c4 ff <0f> 0b e8 5e 67 72 f8 4c 8b 64 24 18 e8 24 6c b6 f8 48 c7 c1 c0 ea