BUG: please report to dccp@vger.kernel.org => prev = 5, last = 5 at net/dccp/ccids/lib/packet_history.c:414/tfrc_rx_hist_sample_rtt() CPU: 1 PID: 29657 Comm: syz-executor.3 Not tainted 5.13.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 tfrc_rx_hist_sample_rtt+0x4a5/0x4b0 net/dccp/ccids/lib/packet_history.c:414 ccid3_hc_rx_packet_recv+0x5b8/0xe90 net/dccp/ccids/ccid3.c:760 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids+0xe1/0x260 net/dccp/input.c:176 dccp_rcv_established net/dccp/input.c:374 [inline] dccp_rcv_established+0x107/0x160 net/dccp/input.c:364 dccp_v4_do_rcv+0x130/0x190 net/dccp/ipv4.c:667 sk_backlog_rcv include/net/sock.h:1020 [inline] __sk_receive_skb+0x29d/0x830 net/core/sock.c:509 dccp_v4_rcv+0xea5/0x19d0 net/dccp/ipv4.c:890 ip_protocol_deliver_rcu+0x5c/0xa20 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x20a/0x370 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ip_local_deliver+0x1b3/0x200 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:458 [inline] ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:429 NF_HOOK include/linux/netfilter.h:301 [inline] NF_HOOK include/linux/netfilter.h:295 [inline] ip_rcv+0xaa/0xd0 net/ipv4/ip_input.c:540 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5459 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5573 process_backlog+0x232/0x6c0 net/core/dev.c:6437 __napi_poll+0xaf/0x440 net/core/dev.c:6985 napi_poll net/core/dev.c:7052 [inline] net_rx_action+0x801/0xb40 net/core/dev.c:7139 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559 invoke_softirq kernel/softirq.c:433 [inline] __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 RIP: 0010:cmpxchg_double_slab mm/slub.c:414 [inline] RIP: 0010:__slab_free+0xd8/0x650 mm/slub.c:3044 Code: 89 44 24 48 0f b6 44 24 4c 74 07 45 31 f6 84 c0 74 0e 45 31 f6 80 7c 24 48 00 0f 84 8d 01 00 00 41 f6 45 0b 40 48 8b 4c 24 78 <0f> 84 c2 00 00 00 48 83 7c 24 10 00 0f 85 d4 02 00 00 48 8b 7c 24 RSP: 0018:ffffc900013df4f0 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffff88806edc2000 RCX: 0000000080040003 RDX: 0000000000040004 RSI: 0000000000000000 RDI: ffff88806edc2000 RBP: ffffc900013df5b8 R08: 0000000000000001 R09: ffffffff81ba0595 R10: ffffffff81340f4a R11: 000000000000003f R12: 0000000000040003 R13: ffff888011042140 R14: 0000000000000000 R15: ffffea0001bb7000 qlink_free mm/kasan/quarantine.c:146 [inline] qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272 __kasan_slab_alloc+0x8e/0xa0 mm/kasan/common.c:438 kasan_slab_alloc include/linux/kasan.h:236 [inline] slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:2914 [inline] kmem_cache_alloc_node+0x269/0x3e0 mm/slub.c:2950 __alloc_skb+0x20b/0x340 net/core/skbuff.c:413 alloc_skb include/linux/skbuff.h:1107 [inline] alloc_skb_with_frags+0x93/0x5d0 net/core/skbuff.c:5992 sock_alloc_send_pskb+0x793/0x920 net/core/sock.c:2364 dccp_sendmsg+0x2c9/0xc90 net/dccp/proto.c:768 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:821 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x331/0x810 net/socket.c:2337 ___sys_sendmsg+0xf3/0x170 net/socket.c:2391 __sys_sendmmsg+0x195/0x470 net/socket.c:2477 __do_sys_sendmmsg net/socket.c:2506 [inline] __se_sys_sendmmsg net/socket.c:2503 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2503 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3c1e690188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 00000000000003a6 RSI: 0000000020005700 RDI: 0000000000000004 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd83ae6fdf R14: 00007f3c1e690300 R15: 0000000000022000 ccid3_first_li: No RTT estimate available, using fallback RTT ccid3_first_li: No RTT estimate available, using fallback RTT