Negotiation of local Allow Short Seqnos failed in state CHANGING at net/dccp/feat.c:1537/dccp_feat_activate_values()
BUG: stored value of X_recv is zero at net/dccp/ccids/ccid3.c:691/ccid3_first_li()
CPU: 1 PID: 4359 Comm: syz-executor.0 Not tainted 6.1.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x163/0x213 lib/dump_stack.c:106
 ccid3_first_li+0x27b/0x340 net/dccp/ccids/ccid3.c:691
 tfrc_lh_interval_add+0x4d3/0x6e0 net/dccp/ccids/lib/loss_interval.c:157
 tfrc_rx_handle_loss+0x65f/0x1760 net/dccp/ccids/lib/packet_history.c:328
 ccid3_hc_rx_packet_recv+0x27d/0xe40 net/dccp/ccids/ccid3.c:744
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids net/dccp/input.c:176 [inline]
 dccp_rcv_established+0x14e/0x250 net/dccp/input.c:374
 dccp_v4_do_rcv+0xc0/0x190 net/dccp/ipv4.c:687
 sk_backlog_rcv include/net/sock.h:1109 [inline]
 __sk_receive_skb+0x370/0x880 net/core/sock.c:565
 ip_protocol_deliver_rcu+0x56/0x590 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x20d/0x440 net/ipv4/ip_input.c:233
 __netif_receive_skb_one_core net/core/dev.c:5489 [inline]
 __netif_receive_skb+0x1b3/0x4e0 net/core/dev.c:5603
 process_backlog+0x498/0x830 net/core/dev.c:5931
 __napi_poll+0x93/0x390 net/core/dev.c:6498
 napi_poll net/core/dev.c:6565 [inline]
 net_rx_action+0x6a2/0xed0 net/core/dev.c:6676
 __do_softirq+0x277/0x75b kernel/softirq.c:571
 do_softirq+0x161/0x240 kernel/softirq.c:472
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1b0/0x1f0 kernel/softirq.c:396
 rcu_read_unlock_bh include/linux/rcupdate.h:808 [inline]
 ip_finish_output2+0x99a/0xd60 net/ipv4/ip_output.c:229
 dst_output include/net/dst.h:445 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 __ip_queue_xmit+0xf09/0x1b60 net/ipv4/ip_output.c:532
 dccp_transmit_skb+0xc47/0x13c0 net/dccp/output.c:138
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids net/dccp/input.c:176 [inline]
 dccp_rcv_established+0x14e/0x250 net/dccp/input.c:374
 dccp_v4_do_rcv+0xc0/0x190 net/dccp/ipv4.c:687
 sk_backlog_rcv include/net/sock.h:1109 [inline]
 __release_sock+0x194/0x420 net/core/sock.c:2906
 release_sock+0x51/0x170 net/core/sock.c:3462
 dccp_sendmsg+0x421/0x730 net/dccp/proto.c:785
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg net/socket.c:734 [inline]
 ____sys_sendmsg+0x487/0x780 net/socket.c:2482
 ___sys_sendmsg net/socket.c:2536 [inline]
 __sys_sendmmsg+0x32d/0x650 net/socket.c:2622
 __do_sys_sendmmsg net/socket.c:2651 [inline]
 __se_sys_sendmmsg net/socket.c:2648 [inline]
 __x64_sys_sendmmsg+0x97/0xb0 net/socket.c:2648
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f215708c189
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2157d43168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f21571abf80 RCX: 00007f215708c189
RDX: 000000000000ffc3 RSI: 0000000020001e80 RDI: 0000000000000006
RBP: 00007f21570e7b01 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff9c3e770f R14: 00007f2157d43300 R15: 0000000000022000
 </TASK>
Negotiation of local Allow Short Seqnos failed in state CHANGING at net/dccp/feat.c:1537/dccp_feat_activate_values()
Negotiation of local Allow Short Seqnos failed in state CHANGING at net/dccp/feat.c:1537/dccp_feat_activate_values()
BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:417/tfrc_rx_hist_sample_rtt()
CPU: 1 PID: 4878 Comm: syz-executor.0 Not tainted 6.1.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x163/0x213 lib/dump_stack.c:106
 tfrc_rx_hist_sample_rtt+0x2ce/0x3e0 net/dccp/ccids/lib/packet_history.c:414
 ccid3_hc_rx_packet_recv+0x556/0xe40 net/dccp/ccids/ccid3.c:760
 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline]
 dccp_deliver_input_to_ccids net/dccp/input.c:176 [inline]
 dccp_rcv_established+0x14e/0x250 net/dccp/input.c:374
 dccp_v4_do_rcv+0xc0/0x190 net/dccp/ipv4.c:687
 sk_backlog_rcv include/net/sock.h:1109 [inline]
 __sk_receive_skb+0x370/0x880 net/core/sock.c:565
 ip_protocol_deliver_rcu+0x56/0x590 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x20d/0x440 net/ipv4/ip_input.c:233
 __netif_receive_skb_one_core net/core/dev.c:5489 [inline]
 __netif_receive_skb+0x1b3/0x4e0 net/core/dev.c:5603
 process_backlog+0x498/0x830 net/core/dev.c:5931
 __napi_poll+0x93/0x390 net/core/dev.c:6498
 napi_poll net/core/dev.c:6565 [inline]
 net_rx_action+0x6a2/0xed0 net/core/dev.c:6676
 __do_softirq+0x277/0x75b kernel/softirq.c:571
 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:650
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:___sys_sendmsg net/socket.c:2536 [inline]
RIP: 0010:__sys_sendmmsg+0x32d/0x650 net/socket.c:2622
Code: b9 ec ff ff 85 c0 0f 88 60 01 00 00 48 89 de 48 8b 7c 24 38 44 89 ea 48 8d 8c 24 d0 03 00 00 41 b8 80 00 00 00 e8 93 f1 ff ff <89> c3 48 b8 00 00 00 00 00 fc ff df 41 80 3c 04 00 74 0d 48 8d bc
RSP: 0018:ffffc900091c7a20 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900091c7d60 RCX: a2d85f171b0e0400
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8a69bc40
RBP: ffffc900091c7f08 R08: dffffc0000000000 R09: ffffed1029553a54
R10: ffffed1029553a54 R11: 1ffff11029553a53 R12: 1ffff92001238f7c
R13: 0000000000040000 R14: 0000000000000019 R15: 1ffff92001238f50
 __do_sys_sendmmsg net/socket.c:2651 [inline]
 __se_sys_sendmmsg net/socket.c:2648 [inline]
 __x64_sys_sendmmsg+0x97/0xb0 net/socket.c:2648
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f215708c189
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2157d43168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f21571abf80 RCX: 00007f215708c189
RDX: 000000000000ffc3 RSI: 0000000020001e80 RDI: 0000000000000006
RBP: 00007f21570e7b01 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff9c3e770f R14: 00007f2157d43300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	ff 85 c0 0f 88 60    	incl   0x60880fc0(%rbp)
   6:	01 00                	add    %eax,(%rax)
   8:	00 48 89             	add    %cl,-0x77(%rax)
   b:	de 48 8b             	fimuls -0x75(%rax)
   e:	7c 24                	jl     0x34
  10:	38 44 89 ea          	cmp    %al,-0x16(%rcx,%rcx,4)
  14:	48 8d 8c 24 d0 03 00 	lea    0x3d0(%rsp),%rcx
  1b:	00
  1c:	41 b8 80 00 00 00    	mov    $0x80,%r8d
  22:	e8 93 f1 ff ff       	callq  0xfffff1ba
* 27:	89 c3                	mov    %eax,%ebx <-- trapping instruction
  29:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  30:	fc ff df
  33:	41 80 3c 04 00       	cmpb   $0x0,(%r12,%rax,1)
  38:	74 0d                	je     0x47
  3a:	48                   	rex.W
  3b:	8d                   	.byte 0x8d
  3c:	bc                   	.byte 0xbc