skbuff: skb_under_panic: text:ffffffff87c06cb7 len:27 put:24 head:ffff888023f90800 data:ffff888023f907f6 tail:0x11 end:0xc0 dev:gre0.2 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:113! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 18213 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 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 e0 da 8b 8a ff 74 24 10 ff 74 24 20 e8 9a 37 c2 ff <0f> 0b e8 dd c7 42 f8 4c 8b 64 24 18 e8 e3 d8 88 f8 48 c7 c1 80 e7 RSP: 0018:ffffc90003fa79f0 EFLAGS: 00010282 RAX: 0000000000000086 RBX: ffff888021c89c00 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815e6c08 RDI: fffff520007f4f30 RBP: ffffffff8a8be780 R08: 0000000000000086 R09: 0000000000000001 R10: ffffffff815e09de R11: 0000000000000000 R12: ffffffff87c06cb7 R13: 0000000000000018 R14: ffff88801bed2000 R15: 00000000000000c0 FS: 00007fed34c77700(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000040 CR3: 000000006c4dd000 CR4: 0000000000150ee0 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 ipgre_header+0x67/0x3c0 net/ipv4/ip_gre.c:852 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_conn_ac_send_sabme_cmd_p_set_x+0x2bf/0x450 net/llc/llc_c_ac.c:791 llc_exec_conn_trans_actions net/llc/llc_conn.c:442 [inline] llc_conn_service net/llc/llc_conn.c:367 [inline] llc_conn_state_process+0x3c3/0x1410 net/llc/llc_conn.c:71 llc_establish_connection+0x33f/0x4e0 net/llc/llc_if.c:113 llc_ui_connect+0x41d/0xcb0 net/llc/af_llc.c:491 __sys_connect_file+0x155/0x1a0 net/socket.c:1896 __sys_connect+0x161/0x190 net/socket.c:1913 __do_sys_connect net/socket.c:1923 [inline] __se_sys_connect net/socket.c:1920 [inline] __x64_sys_connect+0x6f/0xb0 net/socket.c:1920 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: 0033:0x7fed37701ae9 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:00007fed34c77188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007fed37814f60 RCX: 00007fed37701ae9 RDX: 0000000000000010 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007fed3775bf25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd1a3c50bf R14: 00007fed34c77300 R15: 0000000000022000 Modules linked in: ---[ end trace b809dbe2b81f8262 ]--- 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 e0 da 8b 8a ff 74 24 10 ff 74 24 20 e8 9a 37 c2 ff <0f> 0b e8 dd c7 42 f8 4c 8b 64 24 18 e8 e3 d8 88 f8 48 c7 c1 80 e7 RSP: 0018:ffffc90003fa79f0 EFLAGS: 00010282 RAX: 0000000000000086 RBX: ffff888021c89c00 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815e6c08 RDI: fffff520007f4f30 RBP: ffffffff8a8be780 R08: 0000000000000086 R09: 0000000000000001 R10: ffffffff815e09de R11: 0000000000000000 R12: ffffffff87c06cb7 R13: 0000000000000018 R14: ffff88801bed2000 R15: 00000000000000c0 FS: 00007fed34c77700(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000040 CR3: 000000006c4dd000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400