skbuff: skb->data_len is zero but nr_frags=1
------------[ cut here ]------------
WARNING: CPU: 0 PID: 14643 at net/core/skbuff.c:1124 skb_release_data+0x96e/0xb60 net/core/skbuff.c:1124
Modules linked in:
CPU: 0 UID: 0 PID: 14643 Comm: syz.0.3747 Not tainted 6.13.0-rc3-syzkaller-00017-gf44d154d6e3d-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:skb_release_data+0x96e/0xb60 net/core/skbuff.c:1124
Code: ee 4c 89 e2 e9 45 f7 ff ff 44 89 f9 80 e1 07 38 c1 0f 8c 84 fe ff ff 4c 89 ff e8 0d 2d 79 f8 e9 77 fe ff ff e8 e3 c4 12 f8 90 <0f> 0b 90 e9 25 fb ff ff 44 89 f9 80 e1 07 38 c1 0f 8c 4a fd ff ff
RSP: 0018:ffffc90000006e18 EFLAGS: 00010246
RAX: ffffffff898caf0d RBX: 0000000000000000 RCX: ffff888061c09e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff898cae42 R09: 1ffff92000000d60
R10: dffffc0000000000 R11: fffff52000000d61 R12: ffff888032cad642
R13: 1ffff11004e7728e R14: ffff8880273b9474 R15: ffff8880273b947e
FS:  00005555577ce500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa6c156b7e0 CR3: 000000005ebc0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 skb_release_all net/core/skbuff.c:1198 [inline]
 __kfree_skb+0x55/0x70 net/core/skbuff.c:1212
 tcp_clean_rtx_queue net/ipv4/tcp_input.c:3436 [inline]
 tcp_ack+0x2442/0x6bc0 net/ipv4/tcp_input.c:4032
 tcp_rcv_state_process+0x8eb/0x44e0 net/ipv4/tcp_input.c:6805
 tcp_v4_do_rcv+0x77d/0xc70 net/ipv4/tcp_ipv4.c:1939
 tcp_v4_rcv+0x2dc0/0x37f0 net/ipv4/tcp_ipv4.c:2351
 ip_protocol_deliver_rcu+0x22e/0x440 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x341/0x5f0 net/ipv4/ip_input.c:233
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314
 __netif_receive_skb_one_core net/core/dev.c:5672 [inline]
 __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5785
 process_backlog+0x662/0x15b0 net/core/dev.c:6117
 __napi_poll+0xcb/0x490 net/core/dev.c:6883
 napi_poll net/core/dev.c:6952 [inline]
 net_rx_action+0x89b/0x1240 net/core/dev.c:7074
 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
 do_softirq+0x11b/0x1e0 kernel/softirq.c:462
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:389
 sock_orphan include/net/sock.h:2023 [inline]
 netlink_release+0xd70/0x1bf0 net/netlink/af_netlink.c:729
 __sock_release net/socket.c:640 [inline]
 sock_close+0xbc/0x240 net/socket.c:1408
 __fput+0x23c/0xa50 fs/file_table.c:450
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa6c1585d19
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa6c189fb88 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000003742f RCX: 00007fa6c1585d19
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fa6c1777ba0 R08: 0000000000000001 R09: 00007fa6c189fe7f
R10: 00007fa6c1400000 R11: 0000000000000246 R12: 0000000000037469
R13: 00007fa6c1775fa0 R14: 0000000000000032 R15: ffffffffffffffff
 </TASK>