audit: type=1804 audit(1547329004.028:340): pid=31993 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor1" name="/root/syzkaller-testdir658435136/syzkaller.5arVET/752/memory.events" dev="sda1" ino=16609 res=1 ------------[ cut here ]------------ kernel BUG at net/ipv4/ip_output.c:777! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 31987 Comm: syz-executor1 Not tainted 4.20.0+ #16 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'wlan17' (0000000073652a17): kobject_uevent_env RIP: 0010:ip_do_fragment+0x2317/0x2950 net/ipv4/ip_output.c:777 Code: 8b 85 f0 fe ff ff e9 91 e9 ff ff 4c 89 f7 e8 20 a7 34 fb e9 79 ea ff ff 4c 89 f7 e8 13 a7 34 fb e9 e0 e6 ff ff e8 49 b4 f0 fa <0f> 0b 48 89 df e8 3f a7 34 fb e9 a0 e9 ff ff 4c 89 ef 48 89 95 f0 kobject: 'wlan17' (0000000073652a17): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim106/net/wlan17' RSP: 0018:ffff888062666b40 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffff88808a284280 RCX: ffffc90007dd9000 RDX: 0000000000040000 RSI: ffffffff86914107 RDI: 0000000000000005 RBP: ffff888062666c98 R08: ffff8880a7f70700 R09: ffffed100d8e6035 kobject: 'queues' (000000008a9b0156): kobject_add_internal: parent: 'wlan17', set: '' R10: ffffed100d8e6034 R11: ffff88806c7301a3 R12: ffff88808a2841c0 R13: ffff88808a284274 R14: 00000000fffffff2 R15: dffffc0000000000 FS: 00007f4b2192c700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000009afe4000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: kobject: 'queues' (000000008a9b0156): kobject_uevent_env kobject: 'queues' (000000008a9b0156): kobject_uevent_env: filter function caused the event to drop! ip_fragment.constprop.0+0x176/0x240 net/ipv4/ip_output.c:550 ip_finish_output+0x69f/0xf60 net/ipv4/ip_output.c:315 kobject: 'rx-0' (000000002295146c): kobject_add_internal: parent: 'queues', set: 'queues' NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x226/0x880 net/ipv4/ip_output.c:405 kobject: 'rx-0' (000000002295146c): kobject_uevent_env dst_output include/net/dst.h:444 [inline] ip_local_out+0xc4/0x1b0 net/ipv4/ip_output.c:124 iptunnel_xmit+0x58e/0x980 net/ipv4/ip_tunnel_core.c:91 kobject: 'rx-0' (000000002295146c): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim106/net/wlan17/queues/rx-0' ip_tunnel_xmit+0x153b/0x3b3c net/ipv4/ip_tunnel.c:778 kobject: 'tx-0' (00000000efe716d7): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000efe716d7): kobject_uevent_env __gre_xmit+0x5e9/0x9a0 net/ipv4/ip_gre.c:453 ipgre_xmit+0x5b0/0xd60 net/ipv4/ip_gre.c:710 __netdev_start_xmit include/linux/netdevice.h:4382 [inline] netdev_start_xmit include/linux/netdevice.h:4391 [inline] xmit_one net/core/dev.c:3278 [inline] dev_hard_start_xmit+0x261/0xc70 net/core/dev.c:3294 kobject: 'tx-0' (00000000efe716d7): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim106/net/wlan17/queues/tx-0' kobject: 'tx-1' (000000004fbff376): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-1' (000000004fbff376): kobject_uevent_env __dev_queue_xmit+0x2f8a/0x3a60 net/core/dev.c:3864 kobject: 'tx-1' (000000004fbff376): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim106/net/wlan17/queues/tx-1' kobject: 'tx-2' (000000003ba1a128): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-2' (000000003ba1a128): kobject_uevent_env kobject: 'tx-2' (000000003ba1a128): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim106/net/wlan17/queues/tx-2' dev_queue_xmit+0x18/0x20 net/core/dev.c:3897 __bpf_tx_skb net/core/filter.c:2014 [inline] __bpf_redirect_common net/core/filter.c:2052 [inline] __bpf_redirect+0x5dc/0xb70 net/core/filter.c:2059 kobject: 'tx-3' (00000000699b4c4a): kobject_add_internal: parent: 'queues', set: 'queues' ____bpf_clone_redirect net/core/filter.c:2092 [inline] bpf_clone_redirect+0x2ca/0x470 net/core/filter.c:2064 bpf_prog_bebbfe2050753572+0x162/0x1000 kobject: 'tx-3' (00000000699b4c4a): kobject_uevent_env kobject: 'tx-3' (00000000699b4c4a): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim106/net/wlan17/queues/tx-3' kobject: 'batman_adv' (000000009dfa8e09): kobject_add_internal: parent: 'wlan17', set: '' kobject: 'loop4' (000000001354b84d): kobject_uevent_env kobject: 'loop4' (000000001354b84d): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (00000000932fafd3): kobject_uevent_env kobject: 'loop3' (00000000932fafd3): fill_kobj_path: path = '/devices/virtual/block/loop3' netlink: 26 bytes leftover after parsing attributes in process `syz-executor2'. kobject: 'hwsim107' (000000001e183010): kobject_add_internal: parent: 'mac80211_hwsim', set: 'devices' kobject: 'hwsim107' (000000001e183010): kobject_uevent_env Modules linked in: ---[ end trace 098e72e4b5251e7c ]--- kobject: 'hwsim107' (000000001e183010): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim107' RIP: 0010:ip_do_fragment+0x2317/0x2950 net/ipv4/ip_output.c:777 Code: 8b 85 f0 fe ff ff e9 91 e9 ff ff 4c 89 f7 e8 20 a7 34 fb e9 79 ea ff ff 4c 89 f7 e8 13 a7 34 fb e9 e0 e6 ff ff e8 49 b4 f0 fa <0f> 0b 48 89 df e8 3f a7 34 fb e9 a0 e9 ff ff 4c 89 ef 48 89 95 f0 kobject: 'hwsim107' (000000001e183010): kobject_uevent_env RSP: 0018:ffff888062666b40 EFLAGS: 00010246 kobject: 'hwsim107' (000000001e183010): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim107' RAX: 0000000000040000 RBX: ffff88808a284280 RCX: ffffc90007dd9000 kobject: 'ieee80211' (0000000029bfb935): kobject_add_internal: parent: 'hwsim107', set: '(null)' RDX: 0000000000040000 RSI: ffffffff86914107 RDI: 0000000000000005 kobject: 'phy108' (000000001e62559e): kobject_add_internal: parent: 'ieee80211', set: 'devices' RBP: ffff888062666c98 R08: ffff8880a7f70700 R09: ffffed100d8e6035 R10: ffffed100d8e6034 R11: ffff88806c7301a3 R12: ffff88808a2841c0 R13: ffff88808a284274 R14: 00000000fffffff2 R15: dffffc0000000000 FS: 00007f4b2192c700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000009afe4000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 ------------[ cut here ]------------ DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 kernel BUG at net/ipv4/ip_output.c:777!