------------[ cut here ]------------ WARNING: CPU: 1 PID: 5020 at net/core/dev.c:3288 skb_checksum_help+0x3b8/0x5b0 Modules linked in: CPU: 1 PID: 5020 Comm: syz-executor221 Not tainted 6.5.0-rc6-syzkaller-00036-g4853c74bd7ab #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:skb_checksum_help+0x3b8/0x5b0 net/core/dev.c:3288 Code: 41 5c 41 5d 41 5e 41 5f 5d c3 e8 53 66 e4 f8 bb f4 ff ff ff eb e3 e8 47 66 e4 f8 4c 89 ff e8 bf fa ff ff bb ea ff ff ff eb cf <0f> 0b 80 3d 49 46 dc 05 01 0f 85 a8 01 00 00 e8 24 66 e4 f8 bb ea RSP: 0018:ffffc90003aef408 EFLAGS: 00010212 RAX: 0000000000000000 RBX: 000000000000019a RCX: ffff8880276d5940 RDX: ffff8880276d5940 RSI: 000000000000019a RDI: 0000000000000348 RBP: 0000000000000348 R08: ffffffff88a7506b R09: 1ffffffff20f6878 R10: dffffc0000000000 R11: fffffbfff20f6879 R12: 1ffff1100e8fc4fe R13: ffff8880747e27f0 R14: 000000000000019a R15: ffff8880747e2780 FS: 000055555650d380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002000f000 CR3: 0000000072dad000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: netem_enqueue+0x2720/0x3800 net/sched/sch_netem.c:511 netem_enqueue+0x1281/0x3800 net/sched/sch_netem.c:484 dev_qdisc_enqueue+0x47/0x240 net/core/dev.c:3732 __dev_xmit_skb net/core/dev.c:3821 [inline] __dev_queue_xmit+0xdbf/0x38b0 net/core/dev.c:4169 packet_snd net/packet/af_packet.c:3085 [inline] packet_sendmsg+0x466c/0x6170 net/packet/af_packet.c:3117 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg net/socket.c:748 [inline] __sys_sendto+0x484/0x640 net/socket.c:2134 __do_sys_sendto net/socket.c:2146 [inline] __se_sys_sendto net/socket.c:2142 [inline] __x64_sys_sendto+0xde/0xf0 net/socket.c:2142 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe6894e05d9 Code: 48 83 c4 28 c3 e8 d7 19 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc48325628 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe6894e05d9 RDX: 000000000000fc13 RSI: 0000000020000280 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000002f R10: 0000000000000800 R11: 0000000000000246 R12: 00007ffc48325680 R13: 00007ffc48325650 R14: 0000000000000001 R15: 00007ffc48325680