kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 24251 Comm: syz-executor2 Not tainted 4.20.0-rc6+ #349 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'loop4' (0000000081f67fc9): kobject_uevent_env RIP: 0010:__read_once_size include/linux/compiler.h:182 [inline] RIP: 0010:inet_lhash2_lookup+0xc0/0x610 net/ipv4/inet_hashtables.c:274 Code: f2 f2 f2 f2 c7 40 0c 00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 bb 08 dd fa 48 8d 7b 40 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 39 05 00 00 4c 8d a5 58 ff ff ff 48 8b 5b 40 kobject: 'loop4' (0000000081f67fc9): fill_kobj_path: path = '/devices/virtual/block/loop4' RSP: 0018:ffff8881dae07050 EFLAGS: 00010202 RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000000014 RDX: 0000000000000100 RSI: ffffffff86a27bd5 RDI: 0000000000000040 RBP: ffff8881dae07168 R08: 00000000121414ac R09: 0000000000006ccc R10: 0000000000000000 R11: ffffffff8bc672ec R12: dffffc0000000000 R13: 0000000000000000 R14: ffffffff8bc672c0 R15: 00000000121414ac FS: 00007f7d604dd700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 kobject: 'loop1' (0000000060509867): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000072c000 CR3: 00000001d8e22000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop1' (0000000060509867): fill_kobj_path: path = '/devices/virtual/block/loop1' Call Trace: kobject: 'loop5' (0000000086f51b91): kobject_uevent_env kobject: 'loop5' (0000000086f51b91): fill_kobj_path: path = '/devices/virtual/block/loop5' __inet_lookup_listener+0x129/0x2d0 net/ipv4/inet_hashtables.c:309 __inet_lookup include/net/inet_hashtables.h:349 [inline] __inet_lookup_skb include/net/inet_hashtables.h:386 [inline] dccp_v4_rcv+0x11ad/0x1f58 net/dccp/ipv4.c:815 kobject: 'loop1' (0000000060509867): kobject_uevent_env ip_protocol_deliver_rcu+0xb5/0xa10 net/ipv4/ip_input.c:208 ip_local_deliver_finish+0x243/0x390 net/ipv4/ip_input.c:234 kobject: 'loop1' (0000000060509867): fill_kobj_path: path = '/devices/virtual/block/loop1' NF_HOOK include/linux/netfilter.h:289 [inline] ip_local_deliver+0x1e9/0x750 net/ipv4/ip_input.c:255 dst_input include/net/dst.h:450 [inline] ip_rcv_finish+0x1f9/0x300 net/ipv4/ip_input.c:414 kobject: 'loop5' (0000000086f51b91): kobject_uevent_env NF_HOOK include/linux/netfilter.h:289 [inline] ip_rcv+0xed/0x600 net/ipv4/ip_input.c:523 kobject: 'loop5' (0000000086f51b91): fill_kobj_path: path = '/devices/virtual/block/loop5' __netif_receive_skb_one_core+0x14d/0x200 net/core/dev.c:4973 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:5083 process_backlog+0x24e/0x7a0 net/core/dev.c:5923 napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x7fa/0x19b0 net/core/dev.c:6412 kobject: 'loop1' (0000000060509867): kobject_uevent_env kobject: 'loop1' (0000000060509867): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (0000000086f51b91): kobject_uevent_env kobject: 'loop5' (0000000086f51b91): fill_kobj_path: path = '/devices/virtual/block/loop5' __do_softirq+0x308/0xb7e kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1027 do_softirq.part.14+0x126/0x160 kernel/softirq.c:337 do_softirq kernel/softirq.c:329 [inline] __local_bh_enable_ip+0x21d/0x260 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:696 [inline] ip_finish_output2+0xabc/0x1a30 net/ipv4/ip_output.c:231 ip_finish_output+0x7fd/0xfa0 net/ipv4/ip_output.c:317 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x21d/0x8d0 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+0x9af/0x1f40 net/ipv4/ip_output.c:505 ip_queue_xmit+0x56/0x70 include/net/ip.h:198 dccp_transmit_skb+0x98c/0x12e0 net/dccp/output.c:142 dccp_connect+0x39a/0x6e0 net/dccp/output.c:564 dccp_v4_connect+0xd57/0x1540 net/dccp/ipv4.c:126 __inet_stream_connect+0x992/0x1150 net/ipv4/af_inet.c:655 inet_stream_connect+0x58/0xa0 net/ipv4/af_inet.c:719 __sys_connect+0x37d/0x4c0 net/socket.c:1664 __do_sys_connect net/socket.c:1675 [inline] __se_sys_connect net/socket.c:1672 [inline] __x64_sys_connect+0x73/0xb0 net/socket.c:1672 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457669 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7d604dcc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457669 RDX: 0000000000000049 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7d604dd6d4 R13: 00000000004bdc1a R14: 00000000004cd620 R15: 00000000ffffffff Modules linked in: ---[ end trace a6c70a2d1559b683 ]--- RIP: 0010:__read_once_size include/linux/compiler.h:182 [inline] RIP: 0010:inet_lhash2_lookup+0xc0/0x610 net/ipv4/inet_hashtables.c:274 Code: f2 f2 f2 f2 c7 40 0c 00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 bb 08 dd fa 48 8d 7b 40 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 39 05 00 00 4c 8d a5 58 ff ff ff 48 8b 5b 40 RSP: 0018:ffff8881dae07050 EFLAGS: 00010202 RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000000014 RDX: 0000000000000100 RSI: ffffffff86a27bd5 RDI: 0000000000000040 RBP: ffff8881dae07168 R08: 00000000121414ac R09: 0000000000006ccc R10: 0000000000000000 R11: ffffffff8bc672ec R12: dffffc0000000000 R13: 0000000000000000 R14: ffffffff8bc672c0 R15: 00000000121414ac kobject: 'loop0' (00000000e76af2c1): kobject_uevent_env FS: 00007f7d604dd700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000072c000 CR3: 00000001d8e22000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop0' (00000000e76af2c1): fill_kobj_path: path = '/devices/virtual/block/loop0' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400