bond1: (slave gre1): Setting fail_over_mac to active for active-backup mode bond1: (slave gre1): making interface the new active one gre1: entered promiscuous mode bond1: (slave gre1): Enslaving as an active interface with an up link skbuff: skb_under_panic: text:ffffffff89e3ea1d len:-1762516780 put:-1762516780 head:ffff88804ca6f400 data:ffff887fb5b4d3ec tail:0xc0 end:0x180 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:209! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 UID: 0 PID: 6546 Comm: syz-executor.0 Not tainted 6.14.0-rc6-syzkaller-g4d872d51bc9d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:209 Code: b6 04 01 84 c0 74 04 3c 03 7e 21 8b 4b 70 41 56 45 89 e8 48 c7 c7 40 f9 9d 8c 41 57 56 48 89 ee 52 4c 89 e2 e8 0a e7 6d f8 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 b4 b1 f1 f8 4c RSP: 0018:ffffc90004f5f7f0 EFLAGS: 00010282 RAX: 0000000000000099 RBX: ffff888031479280 RCX: ffffffff819955b9 RDX: 0000000000000000 RSI: ffffffff8199b92e RDI: 0000000000000005 RBP: ffffffff8c9e0ca0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000001 R12: ffffffff89e3ea1d R13: 0000000096f220d4 R14: ffffffff8c9df900 R15: 0000000000000180 FS: 00007fc9ed2276c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000003404c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_under_panic net/core/skbuff.c:219 [inline] skb_push+0xca/0xf0 net/core/skbuff.c:2546 ipgre_header+0x6d/0x540 net/ipv4/ip_gre.c:891 dev_hard_header include/linux/netdevice.h:3365 [inline] packet_snd net/packet/af_packet.c:3084 [inline] packet_sendmsg+0x41ba/0x56c0 net/packet/af_packet.c:3164 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:733 [inline] ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2627 __sys_sendmsg+0x16e/0x220 net/socket.c:2659 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc9ec47bdb9 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc9ed2270c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fc9ec59c050 RCX: 00007fc9ec47bdb9 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004 RBP: 00007fc9ec4d8ad0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fc9ec59c050 R15: 00007ffdd22198c8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:209 Code: b6 04 01 84 c0 74 04 3c 03 7e 21 8b 4b 70 41 56 45 89 e8 48 c7 c7 40 f9 9d 8c 41 57 56 48 89 ee 52 4c 89 e2 e8 0a e7 6d f8 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 b4 b1 f1 f8 4c RSP: 0018:ffffc90004f5f7f0 EFLAGS: 00010282 RAX: 0000000000000099 RBX: ffff888031479280 RCX: ffffffff819955b9 RDX: 0000000000000000 RSI: ffffffff8199b92e RDI: 0000000000000005 RBP: ffffffff8c9e0ca0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000001 R12: ffffffff89e3ea1d R13: 0000000096f220d4 R14: ffffffff8c9df900 R15: 0000000000000180 FS: 00007fc9ed2276c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc9ed206d58 CR3: 000000003404c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400