BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 0 PID: 5510 Comm: syz-executor.0 Not tainted 6.9.0-rc2-syzkaller-00194-g8cb4a9a82b21 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:114
 tfrc_rx_hist_sample_rtt+0x3e1/0x4a0 net/dccp/ccids/lib/packet_history.c:414
 ccid3_hc_rx_packet_recv+0x443/0xf50 net/dccp/ccids/ccid3.c:760
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xe3/0x270 net/dccp/input.c:176
 dccp_rcv_established net/dccp/input.c:374 [inline]
 dccp_rcv_established+0x10a/0x160 net/dccp/input.c:364
 dccp_v4_do_rcv+0x16d/0x1b0 net/dccp/ipv4.c:675
 sk_backlog_rcv include/net/sock.h:1106 [inline]
 __sk_receive_skb+0x7be/0x8b0 net/core/sock.c:569
 dccp_v4_rcv+0x124f/0x18d0 net/dccp/ipv4.c:898
 ip_protocol_deliver_rcu+0x45e/0x4e0 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x316/0x570 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:460 [inline]
 ip_rcv_finish net/ipv4/ip_input.c:449 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip_rcv+0x2c5/0x5d0 net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core+0x199/0x1e0 net/core/dev.c:5538
 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5652
 process_backlog+0x12f/0x6f0 net/core/dev.c:5981
 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6632
 napi_poll net/core/dev.c:6701 [inline]
 net_rx_action+0x9ad/0xf10 net/core/dev.c:6816
 __do_softirq+0x218/0x922 kernel/softirq.c:554
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:633 [inline]
 irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:kernel_text_address kernel/extable.c:119 [inline]
RIP: 0010:kernel_text_address+0x69/0xe0 kernel/extable.c:94
Code: e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 04 84 d2 75 6f 83 3d 09 3d 87 0e 01 76 1e e8 5e 18 1a 00 84 c0 74 36 48 89 df <e8> 32 9e 1e 00 48 83 c4 08 0f b6 c0 5b c3 cc cc cc cc 48 81 fb 00
RSP: 0018:ffffc900038f7218 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 00007fa2ca67cd29 RCX: 1ffffffff1fc20f8
RDX: 0000000000000000 RSI: ffffffff8b8f6f60 RDI: 00007fa2ca67cd29
RBP: 0000000000000001 R08: 0000000000000007 R09: ffffffffff600000
R10: 00007fa2ca67c000 R11: 0000000000000001 R12: ffffc900038f72b0
R13: ffffffff81793df0 R14: ffffc900038f7328 R15: ffff88802a2e2440
 __kernel_text_address+0xd/0x40 kernel/extable.c:79
 unwind_get_return_address+0x7c/0xe0 arch/x86/kernel/unwind_orc.c:369
 arch_stack_walk+0xc1/0x170 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3798 [inline]
 slab_alloc_node mm/slub.c:3845 [inline]
 kmem_cache_alloc_node+0x177/0x340 mm/slub.c:3888
 __alloc_skb+0x2b1/0x380 net/core/skbuff.c:658
 alloc_skb include/linux/skbuff.h:1313 [inline]
 alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6504
 sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2795
 sock_alloc_send_skb include/net/sock.h:1842 [inline]
 dccp_sendmsg+0x2db/0xcf0 net/dccp/proto.c:764
 inet_sendmsg+0x119/0x140 net/ipv4/af_inet.c:851
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0xa09/0xc90 net/socket.c:2584
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2638
 __sys_sendmmsg+0x1a1/0x450 net/socket.c:2724
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2750
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7fa2ca67cd29
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa2cb3ae0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fa2ca7abf80 RCX: 00007fa2ca67cd29
RDX: 000000000000ffc3 RSI: 0000000020001e80 RDI: 0000000000000006
RBP: 00007fa2ca6c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa2ca7abf80 R15: 00007fffd7f00a98
 </TASK>
Negotiation of local Allow Short Seqnos failed in state CHANGING at net/dccp/feat.c:1534/dccp_feat_activate_values()
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt()
CPU: 0 PID: 5716 Comm: syz-executor.0 Not tainted 6.9.0-rc2-syzkaller-00194-g8cb4a9a82b21 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:114
 tfrc_rx_hist_sample_rtt+0x3e1/0x4a0 net/dccp/ccids/lib/packet_history.c:414
 ccid3_hc_rx_packet_recv+0x443/0xf50 net/dccp/ccids/ccid3.c:760
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids+0xe3/0x270 net/dccp/input.c:176
 dccp_rcv_established net/dccp/input.c:374 [inline]
 dccp_rcv_established+0x10a/0x160 net/dccp/input.c:364
 dccp_v4_do_rcv+0x16d/0x1b0 net/dccp/ipv4.c:675
 sk_backlog_rcv include/net/sock.h:1106 [inline]
 __sk_receive_skb+0x7be/0x8b0 net/core/sock.c:569
 dccp_v4_rcv+0x124f/0x18d0 net/dccp/ipv4.c:898
 ip_protocol_deliver_rcu+0x45e/0x4e0 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x316/0x570 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:460 [inline]
 ip_rcv_finish net/ipv4/ip_input.c:449 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 NF_HOOK include/linux/netfilter.h:308 [inline]
 ip_rcv+0x2c5/0x5d0 net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core+0x199/0x1e0 net/core/dev.c:5538
 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5652
 process_backlog+0x12f/0x6f0 net/core/dev.c:5981
 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6632
 napi_poll net/core/dev.c:6701 [inline]
 net_rx_action+0x9ad/0xf10 net/core/dev.c:6816
 __do_softirq+0x218/0x922 kernel/softirq.c:554
 do_softirq kernel/softirq.c:455 [inline]
 do_softirq+0xb2/0xf0 kernel/softirq.c:442
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382
 dccp_sendmsg+0x2c1/0xcf0 net/dccp/proto.c:763
 inet_sendmsg+0x119/0x140 net/ipv4/af_inet.c:851
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0xa09/0xc90 net/socket.c:2584
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2638
 __sys_sendmmsg+0x1a1/0x450 net/socket.c:2724
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2750
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7fa2ca67cd29
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa2cb3ae0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fa2ca7abf80 RCX: 00007fa2ca67cd29
RDX: 000000000000ffc3 RSI: 0000000020001e80 RDI: 0000000000000006
RBP: 00007fa2ca6c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa2ca7abf80 R15: 00007fffd7f00a98
 </TASK>
----------------
Code disassembly (best guess):
   0:	e0 07                	loopne 0x9
   2:	48 c1 e9 03          	shr    $0x3,%rcx
   6:	83 c0 03             	add    $0x3,%eax
   9:	0f b6 14 11          	movzbl (%rcx,%rdx,1),%edx
   d:	38 d0                	cmp    %dl,%al
   f:	7c 04                	jl     0x15
  11:	84 d2                	test   %dl,%dl
  13:	75 6f                	jne    0x84
  15:	83 3d 09 3d 87 0e 01 	cmpl   $0x1,0xe873d09(%rip)        # 0xe873d25
  1c:	76 1e                	jbe    0x3c
  1e:	e8 5e 18 1a 00       	call   0x1a1881
  23:	84 c0                	test   %al,%al
  25:	74 36                	je     0x5d
  27:	48 89 df             	mov    %rbx,%rdi
* 2a:	e8 32 9e 1e 00       	call   0x1e9e61 <-- trapping instruction
  2f:	48 83 c4 08          	add    $0x8,%rsp
  33:	0f b6 c0             	movzbl %al,%eax
  36:	5b                   	pop    %rbx
  37:	c3                   	ret
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	cc                   	int3
  3c:	48                   	rex.W
  3d:	81                   	.byte 0x81
  3e:	fb                   	sti