syzbot

syzkaller0: entered promiscuous mode
syzkaller0: entered allmulticast mode
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5930 at include/linux/skbuff.h:2871 skb_transport_header include/linux/skbuff.h:2871 [inline]
WARNING: CPU: 0 PID: 5930 at include/linux/skbuff.h:2871 tcf_get_base_ptr include/net/pkt_cls.h:528 [inline]
WARNING: CPU: 0 PID: 5930 at include/linux/skbuff.h:2871 em_cmp_match+0x56e/0x7c0 net/sched/em_cmp.c:25
Modules linked in:
CPU: 0 PID: 5930 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:skb_transport_header include/linux/skbuff.h:2871 [inline]
RIP: 0010:tcf_get_base_ptr include/net/pkt_cls.h:528 [inline]
RIP: 0010:em_cmp_match+0x56e/0x7c0 net/sched/em_cmp.c:25
Code: e8 77 b3 d5 f8 39 dd 0f 94 c0 e9 40 fe ff ff e8 e8 b1 d5 f8 e9 34 fe ff ff e8 de b1 d5 f8 0f 0b e9 97 fc ff ff e8 d2 b1 d5 f8 <0f> 0b e9 79 fb ff ff 89 d9 80 e1 07 fe c1 38 c1 0f 8c e5 fa ff ff
RSP: 0018:ffffc900032e70d8 EFLAGS: 00010293
RAX: ffffffff88b1614e RBX: ffff8880240a736a RCX: ffff88802bc8bc00
RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff
RBP: 000000000000ffff R08: ffff88802bc8bc00 R09: 0000000000000003
R10: 0000000000000002 R11: 0000000000000000 R12: 1ffff11004814e6d
R13: 1ffff110039fd416 R14: ffff88801cfea000 R15: ffff88801cfea0b6
FS:  0000555588f44500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002280 CR3: 000000002dfd5000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 tcf_em_match net/sched/ematch.c:494 [inline]
 __tcf_em_tree_match+0x1cf/0x7a0 net/sched/ematch.c:520
 tcf_em_tree_match include/net/pkt_cls.h:501 [inline]
 basic_classify+0x115/0x2d0 net/sched/cls_basic.c:50
 tc_classify include/net/tc_wrapper.h:227 [inline]
 __tcf_classify net/sched/cls_api.c:1704 [inline]
 tcf_classify+0x4c4/0xeb0 net/sched/cls_api.c:1788
 htb_classify net/sched/sch_htb.c:245 [inline]
 htb_enqueue+0x392/0x1260 net/sched/sch_htb.c:625
 dev_qdisc_enqueue+0x48/0x220 net/core/dev.c:3850
 __dev_xmit_skb net/core/dev.c:3939 [inline]
 __dev_queue_xmit+0xea8/0x36b0 net/core/dev.c:4417
 packet_snd net/packet/af_packet.c:3137 [inline]
 packet_sendmsg+0x3b7a/0x4d70 net/packet/af_packet.c:3169
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x5ba/0x960 net/socket.c:2594
 ___sys_sendmsg+0x2a6/0x360 net/socket.c:2648
 __sys_sendmsg net/socket.c:2677 [inline]
 __do_sys_sendmsg net/socket.c:2686 [inline]
 __se_sys_sendmsg+0x1c2/0x2b0 net/socket.c:2684
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8fed59acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffee36a6d68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f8fed815fa0 RCX: 00007f8fed59acb9
RDX: 0000000000000004 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007f8fed608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8fed815fac R14: 00007f8fed815fa0 R15: 00007f8fed815fa0
 </TASK>