audit: type=1400 audit(1580256884.154:47): avc: denied { create } for pid=8332 comm="syz-executor.2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 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: 8339 Comm: syz-executor.4 Not tainted 4.19.99-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:nft_chain_parse_hook+0x37c/0x8c0 net/netfilter/nf_tables_api.c:1521 Code: 00 e8 08 13 6d fb 41 83 fd 05 0f 87 30 04 00 00 e8 79 11 6d fb 48 8d 7b 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 77 04 00 00 44 89 e9 be 01 00 RSP: 0018:ffff8880551bf200 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000e8eb000 RDX: 0000000000000003 RSI: ffffffff85fdf317 RDI: 0000000000000018 RBP: ffff8880551bf2f0 R08: ffff8880551b6400 R09: 0000000000000000 R10: ffffed100aa37e4c R11: ffff8880551bf267 R12: ffff8880551bf370 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880551bf2c8 FS: 00007ff380bb0700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000075c000 CR3: 00000000a4751000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nf_tables_addchain.constprop.0+0x1a6/0xf90 net/netfilter/nf_tables_api.c:1602 nf_tables_newchain+0xf54/0x14d0 net/netfilter/nf_tables_api.c:1877 nfnetlink_rcv_batch+0xef6/0x1750 net/netfilter/nfnetlink.c:430 nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:540 [inline] nfnetlink_rcv+0x3ed/0x460 net/netfilter/nfnetlink.c:558 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x53a/0x730 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:632 ___sys_sendmsg+0x803/0x920 net/socket.c:2115 __sys_sendmsg+0x105/0x1d0 net/socket.c:2153 __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2160 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b349 Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff380bafc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff380bb06d4 RCX: 000000000045b349 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000940 R14: 00000000004ca9e5 R15: 000000000075bfd4 Modules linked in: ---[ end trace e75cdeaeb2c753a8 ]--- RIP: 0010:nft_chain_parse_hook+0x37c/0x8c0 net/netfilter/nf_tables_api.c:1521 Code: 00 e8 08 13 6d fb 41 83 fd 05 0f 87 30 04 00 00 e8 79 11 6d fb 48 8d 7b 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 77 04 00 00 44 89 e9 be 01 00 RSP: 0018:ffff8880551bf200 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000e8eb000 kauditd_printk_skb: 2 callbacks suppressed audit: type=1804 audit(1580256884.994:50): pid=8346 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir046535609/syzkaller.u7sKGa/3/bus" dev="sda1" ino=16546 res=1 RDX: 0000000000000003 RSI: ffffffff85fdf317 RDI: 0000000000000018 RBP: ffff8880551bf2f0 R08: ffff8880551b6400 R09: 0000000000000000 R10: ffffed100aa37e4c R11: ffff8880551bf267 R12: ffff8880551bf370 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880551bf2c8 FS: 00007ff380bb0700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 audit: type=1804 audit(1580256885.094:51): pid=8349 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir046535609/syzkaller.u7sKGa/3/bus" dev="sda1" ino=16546 res=1 team0 (unregistering): Port device team_slave_0 removed CR2: 00007ff380b6ddb8 CR3: 00000000a4751000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400