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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 7abc678e3084 Merge tag 'pmdomain-v6.16-rc2' of git://git.k.. git tree: bpf console+strace: https://syzkaller.appspot.com/x/log.txt?x=11cc0ca2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=12b5044868deb866 dashboard link: https://syzkaller.appspot.com/bug?extid=af43e647fd835acc02df compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10480f82580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14248834580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8a9fc2a6bfdf/disk-7abc678e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/29375cef95f6/vmlinux-7abc678e.xz kernel image: https://storage.googleapis.com/syzbot-assets/8148ffc5b47b/bzImage-7abc678e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+af43e647fd835acc02df@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5874 at ./include/linux/skbuff.h:3032 skb_reset_transport_header include/linux/skbuff.h:3032 [inline] WARNING: CPU: 1 PID: 5874 at ./include/linux/skbuff.h:3032 ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151 Modules linked in: CPU: 1 UID: 0 PID: 5874 Comm: syz-executor410 Not tainted 6.16.0-rc6-syzkaller-g7abc678e3084 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:skb_reset_transport_header include/linux/skbuff.h:3032 [inline] RIP: 0010:ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151 Code: ff ff e8 f1 db 80 f7 49 c7 c5 a3 ff ff ff e9 27 fe ff ff e8 e0 db 80 f7 49 c7 c5 a3 ff ff ff e9 16 fe ff ff e8 cf db 80 f7 90 <0f> 0b 90 e9 71 f5 ff ff e8 c1 db 80 f7 e9 d3 00 00 00 e8 b7 db 80 RSP: 0018:ffffc90003faed00 EFLAGS: 00010293 RAX: ffffffff8a3f4d21 RBX: ffffffff8de66da0 RCX: ffff888030385a00 RDX: 0000000000000000 RSI: 00000000000100f4 RDI: 0000000000010000 RBP: ffffc90003faee30 R08: ffffea0001ff8240 R09: 0000013a000001a7 R10: ffffea0001ff8240 R11: 0000013a000001a7 R12: 1ffffffff1bccdb4 R13: ffff8880334eb280 R14: 00000000000100f4 R15: ffff8880334eb350 FS: 000055555a160380(0000) GS:ffff888125d23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000010000 CR3: 000000007fe76000 CR4: 00000000003526f0 Call Trace: skb_mac_gso_segment+0x31c/0x640 net/core/gso.c:53 nsh_gso_segment+0x54a/0xe10 net/nsh/nsh.c:110 skb_mac_gso_segment+0x31c/0x640 net/core/gso.c:53 __skb_gso_segment+0x342/0x510 net/core/gso.c:124 skb_gso_segment include/net/gso.h:83 [inline] validate_xmit_skb+0x857/0x11b0 net/core/dev.c:3950 validate_xmit_skb_list+0x84/0x120 net/core/dev.c:4000 sch_direct_xmit+0xd3/0x4b0 net/sched/sch_generic.c:329 __dev_xmit_skb net/core/dev.c:4102 [inline] __dev_queue_xmit+0x17b6/0x3a70 net/core/dev.c:4679 packet_snd net/packet/af_packet.c:3130 [inline] packet_sendmsg+0x3e16/0x5060 net/packet/af_packet.c:3162 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:727 ____sys_sendmsg+0x505/0x830 net/socket.c:2566 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ffb36bb8ea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 1a 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff4bae10a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007ffb36bb8ea9 RDX: 00000000200400c4 RSI: 0000200000000180 RDI: 0000000000000003 RBP: 00000000000f4240 R08: 0000000000000001 R09: 0000000000000001 R10: 0000200000000180 R11: 0000000000000246 R12: 00007fff4bae1100 R13: 00007ffb36c063fe R14: 0000000000000003 R15: 00007fff4bae10e0 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup