BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:425/tfrc_rx_hist_sample_rtt() CPU: 0 PID: 24553 Comm: syz-executor1 Not tainted 4.16.0+ #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b9/0x29f lib/dump_stack.c:53 tfrc_rx_hist_sample_rtt.cold.3+0x54/0x5c net/dccp/ccids/lib/packet_history.c:422 ccid3_hc_rx_packet_recv+0x5c8/0xed0 net/dccp/ccids/ccid3.c:765 ccid_hc_rx_packet_recv net/dccp/ccid.h:185 [inline] dccp_deliver_input_to_ccids+0xf0/0x280 net/dccp/input.c:180 dccp_rcv_established+0x87/0xb0 net/dccp/input.c:378 dccp_v4_do_rcv+0x153/0x180 net/dccp/ipv4.c:653 sk_backlog_rcv include/net/sock.h:909 [inline] __sk_receive_skb+0x3a2/0xd60 net/core/sock.c:513 dccp_v4_rcv+0x1151/0x2048 net/dccp/ipv4.c:874 ip_local_deliver_finish+0x2e3/0xd80 net/ipv4/ip_input.c:215 NF_HOOK include/linux/netfilter.h:288 [inline] ip_local_deliver+0x1e1/0x720 net/ipv4/ip_input.c:256 dst_input include/net/dst.h:450 [inline] ip_rcv_finish+0x81b/0x2200 net/ipv4/ip_input.c:396 NF_HOOK include/linux/netfilter.h:288 [inline] ip_rcv+0xb70/0x143d net/ipv4/ip_input.c:492 __netif_receive_skb_core+0x26f5/0x3630 net/core/dev.c:4592 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:4657 process_backlog+0x219/0x760 net/core/dev.c:5337 napi_poll net/core/dev.c:5735 [inline] net_rx_action+0x7b7/0x1930 net/core/dev.c:5801 __do_softirq+0x2e0/0xaf5 kernel/softirq.c:285 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1045 do_softirq.part.17+0x14d/0x190 kernel/softirq.c:329 do_softirq arch/x86/include/asm/preempt.h:23 [inline] __local_bh_enable_ip+0x1ec/0x230 kernel/softirq.c:182 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:728 [inline] ip_finish_output2+0xab2/0x1840 net/ipv4/ip_output.c:231 ip_finish_output+0x828/0xf80 net/ipv4/ip_output.c:317 NF_HOOK_COND include/linux/netfilter.h:277 [inline] ip_output+0x21b/0x850 net/ipv4/ip_output.c:405 dst_output include/net/dst.h:444 [inline] ip_local_out+0xc5/0x1b0 net/ipv4/ip_output.c:124 ip_queue_xmit+0x9d0/0x1fa0 net/ipv4/ip_output.c:504 dccp_transmit_skb+0x999/0x12e0 net/dccp/output.c:142 dccp_xmit_packet+0x250/0x790 net/dccp/output.c:281 dccp_write_xmit+0x190/0x1f0 net/dccp/output.c:363 dccp_sendmsg+0x8c7/0x1020 net/dccp/proto.c:818 inet_sendmsg+0x19f/0x690 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:639 __sys_sendto+0x3d7/0x670 net/socket.c:1789 SYSC_sendto net/socket.c:1801 [inline] SyS_sendto+0x40/0x60 net/socket.c:1797 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x455259 RSP: 002b:00007f82eda47c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f82eda486d4 RCX: 0000000000455259 RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000015 RBP: 000000000072bea0 R08: 00000000200000c0 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004f9 R14: 00000000006fa7f8 R15: 0000000000000000 dccp_close: ABORT with 11 bytes unread sctp: [Deprecated]: syz-executor1 (pid 24700) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor1 (pid 24730) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 16 bytes leftover after parsing attributes in process `syz-executor6'. FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 24996 Comm: syz-executor4 Not tainted 4.16.0+ #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 netlink: 16 bytes leftover after parsing attributes in process `syz-executor6'. Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b9/0x29f lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x1a lib/fault-inject.c:149 should_failslab+0x124/0x180 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:422 [inline] slab_alloc_node mm/slab.c:3287 [inline] kmem_cache_alloc_node+0x272/0x780 mm/slab.c:3630 __alloc_skb+0x111/0x780 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:987 [inline] sock_wmalloc+0x165/0x1e0 net/core/sock.c:1940 pppol2tp_sendmsg+0x23a/0x6c0 net/l2tp/l2tp_ppp.c:314 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:639 ___sys_sendmsg+0x805/0x940 net/socket.c:2117 __sys_sendmsg+0x115/0x270 net/socket.c:2155 SYSC_sendmsg net/socket.c:2164 [inline] SyS_sendmsg+0x29/0x30 net/socket.c:2162 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x455259 RSP: 002b:00007fea21c53c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fea21c546d4 RCX: 0000000000455259 RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000015 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016 R13: 00000000000004ee R14: 00000000006fa6f0 R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 25023 Comm: syz-executor4 Not tainted 4.16.0+ #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b9/0x29f lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x1a lib/fault-inject.c:149 should_failslab+0x124/0x180 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:422 [inline] slab_alloc_node mm/slab.c:3287 [inline] kmem_cache_alloc_node_trace+0x26f/0x770 mm/slab.c:3649 __do_kmalloc_node mm/slab.c:3669 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3684 __kmalloc_reserve.isra.38+0x3a/0xe0 net/core/skbuff.c:137 __alloc_skb+0x14d/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:987 [inline] sock_wmalloc+0x165/0x1e0 net/core/sock.c:1940 pppol2tp_sendmsg+0x23a/0x6c0 net/l2tp/l2tp_ppp.c:314 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:639 ___sys_sendmsg+0x805/0x940 net/socket.c:2117 __sys_sendmsg+0x115/0x270 net/socket.c:2155 SYSC_sendmsg net/socket.c:2164 [inline] SyS_sendmsg+0x29/0x30 net/socket.c:2162 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x455259 RSP: 002b:00007fea21c53c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fea21c546d4 RCX: 0000000000455259 RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000015 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016 R13: 00000000000004ee R14: 00000000006fa6f0 R15: 0000000000000001 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 25064 Comm: syz-executor4 Not tainted 4.16.0+ #2 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b9/0x29f lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x1a lib/fault-inject.c:149 should_failslab+0x124/0x180 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:422 [inline] slab_alloc_node mm/slab.c:3287 [inline] kmem_cache_alloc_node_trace+0x5a/0x770 mm/slab.c:3649 __do_kmalloc_node mm/slab.c:3669 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3684 __kmalloc_reserve.isra.38+0x3a/0xe0 net/core/skbuff.c:137 pskb_expand_head+0x220/0x10c0 net/core/skbuff.c:1459 __skb_cow include/linux/skbuff.h:2891 [inline] skb_cow_head include/linux/skbuff.h:2925 [inline] l2tp_xmit_skb+0x12bf/0x17d0 net/l2tp/l2tp_core.c:1101 pppol2tp_sendmsg+0x4ae/0x6c0 net/l2tp/l2tp_ppp.c:341 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:639 ___sys_sendmsg+0x805/0x940 net/socket.c:2117 __sys_sendmsg+0x115/0x270 net/socket.c:2155 SYSC_sendmsg net/socket.c:2164 [inline] SyS_sendmsg+0x29/0x30 net/socket.c:2162 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x455259 RSP: 002b:00007fea21c53c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fea21c546d4 RCX: 0000000000455259 RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000015 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016 R13: 00000000000004ee R14: 00000000006fa6f0 R15: 0000000000000002 can: request_module (can-proto-3) failed. can: request_module (can-proto-3) failed. netlink: 'syz-executor5': attribute type 4 has an invalid length. netlink: 'syz-executor5': attribute type 4 has an invalid length. netlink: 'syz-executor5': attribute type 2 has an invalid length. netlink: 'syz-executor5': attribute type 2 has an invalid length.