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: 6678 Comm: dhcpcd-run-hook Tainted: G W 6.10.0-rc3-syzkaller-00018-gac2193b4b460 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114 dump_stack+0x1c/0x28 lib/dump_stack.c:123 tfrc_rx_hist_sample_rtt+0x34c/0x444 net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0x554/0xc98 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+0x1ac/0x2d8 net/dccp/input.c:374 dccp_v4_do_rcv+0xe8/0x1d4 net/dccp/ipv4.c:677 sk_backlog_rcv include/net/sock.h:1106 [inline] __sk_receive_skb+0x3e4/0x8bc net/core/sock.c:569 dccp_v4_rcv+0x100c/0x1574 net/dccp/ipv4.c:900 ip_protocol_deliver_rcu+0x1f8/0x47c net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x280/0x4ec net/ipv4/ip_input.c:233 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:314 ip_local_deliver+0x120/0x194 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:460 [inline] ip_rcv_finish+0x220/0x24c net/ipv4/ip_input.c:449 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:314 ip_rcv+0x7c/0x9c net/ipv4/ip_input.c:569 __netif_receive_skb_one_core net/core/dev.c:5625 [inline] __netif_receive_skb+0x18c/0x3c8 net/core/dev.c:5739 process_backlog+0x3e0/0x798 net/core/dev.c:6068 __napi_poll+0xb4/0x3fc net/core/dev.c:6722 napi_poll net/core/dev.c:6791 [inline] net_rx_action+0x604/0xe4c net/core/dev.c:6907 handle_softirqs+0x2e4/0xbfc kernel/softirq.c:554 __do_softirq+0x14/0x20 kernel/softirq.c:588 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:889 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86 invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0x1d8/0x434 kernel/softirq.c:637 irq_exit_rcu+0x14/0x84 kernel/softirq.c:649 __el1_irq arch/arm64/kernel/entry-common.c:537 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:551 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:556 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:594 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] lruvec_stat_mod_folio include/linux/vmstat.h:561 [inline] lruvec_stat_sub_folio include/linux/vmstat.h:625 [inline] pagetable_pte_dtor+0x17c/0x228 include/linux/mm.h:3004 __pte_free_tlb arch/arm64/include/asm/tlb.h:85 [inline] free_pte_range mm/memory.c:194 [inline] free_pmd_range mm/memory.c:212 [inline] free_pud_range mm/memory.c:246 [inline] free_p4d_range mm/memory.c:280 [inline] free_pgd_range+0x7a8/0x152c mm/memory.c:360 free_pgtables+0x568/0x630 exit_mmap+0x3a4/0xcb8 mm/mmap.c:3352 __mmput+0xec/0x390 kernel/fork.c:1346 mmput+0x70/0xac kernel/fork.c:1368 exec_mmap+0x498/0x568 fs/exec.c:1063 begin_new_exec+0x664/0x10a8 fs/exec.c:1329 load_elf_binary+0x74c/0x204c fs/binfmt_elf.c:996 search_binary_handler fs/exec.c:1797 [inline] exec_binprm fs/exec.c:1839 [inline] bprm_execve+0x7e0/0x1504 fs/exec.c:1891 do_execveat_common+0x67c/0x814 fs/exec.c:1998 do_execve fs/exec.c:2072 [inline] __do_sys_execve fs/exec.c:2148 [inline] __se_sys_execve fs/exec.c:2143 [inline] __arm64_sys_execve+0x98/0xb0 fs/exec.c:2143 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 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() 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()