skbuff: skb_under_panic: text:ffffffff87f56271 len:47 put:44 head:ffff88807a0afc00 data:ffff88807a0afbd8 tail:0x7 end:0xc0 dev:ip6gre0.2 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:113! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 31817 Comm: syz-executor.0 Not tainted 5.15.0-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:113 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 60 fc 8b 8a ff 74 24 10 ff 74 24 20 e8 86 65 c2 ff <0f> 0b e8 53 23 45 f8 4c 8b 64 24 18 e8 79 87 8b f8 48 c7 c1 00 09 RSP: 0018:ffffc900043ef648 EFLAGS: 00010286 RAX: 0000000000000088 RBX: ffff88807dbd8640 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815ef908 RDI: fffff5200087debb RBP: ffffffff8a8c0900 R08: 0000000000000088 R09: 0000000000000000 R10: ffffffff815e96ee R11: 0000000000000000 R12: ffffffff87f56271 R13: 000000000000002c R14: ffff88802a860000 R15: 00000000000000c0 FS: 00007fe590d7d700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3175b000 CR3: 000000007f7b9000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_under_panic net/core/skbuff.c:123 [inline] skb_push.cold+0x24/0x24 net/core/skbuff.c:2009 ip6gre_header+0xc1/0x8c0 net/ipv6/ip6_gre.c:1367 dev_hard_header include/linux/netdevice.h:3265 [inline] vlan_dev_hard_header+0x13d/0x510 net/8021q/vlan_dev.c:82 dev_hard_header include/linux/netdevice.h:3265 [inline] llc_mac_hdr_init+0x12f/0x190 net/llc/llc_output.c:33 llc_build_and_send_ui_pkt+0x1d0/0x270 net/llc/llc_output.c:65 llc_ui_sendmsg+0x7b9/0x10b0 net/llc/af_llc.c:958 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x331/0x810 net/socket.c:2409 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463 __sys_sendmmsg+0x195/0x470 net/socket.c:2549 __do_sys_sendmmsg net/socket.c:2578 [inline] __se_sys_sendmmsg net/socket.c:2575 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2575 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe593828ae9 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:00007fe590d7d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fe59393c020 RCX: 00007fe593828ae9 RDX: 03fffffffffffeed RSI: 0000000020001380 RDI: 0000000000000005 RBP: 00007fe593882f25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe594487bf R14: 00007fe590d7d300 R15: 0000000000022000 Modules linked in: ---[ end trace 08a93c514759cab4 ]--- RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:113 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 60 fc 8b 8a ff 74 24 10 ff 74 24 20 e8 86 65 c2 ff <0f> 0b e8 53 23 45 f8 4c 8b 64 24 18 e8 79 87 8b f8 48 c7 c1 00 09 RSP: 0018:ffffc900043ef648 EFLAGS: 00010286 RAX: 0000000000000088 RBX: ffff88807dbd8640 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815ef908 RDI: fffff5200087debb RBP: ffffffff8a8c0900 R08: 0000000000000088 R09: 0000000000000000 R10: ffffffff815e96ee R11: 0000000000000000 R12: ffffffff87f56271 R13: 000000000000002c R14: ffff88802a860000 R15: 00000000000000c0 FS: 00007fe590d7d700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3175b000 CR3: 000000007f7b9000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400