kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 27863 Comm: syz-executor.4 Not tainted 5.5.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:nft_chain_parse_hook+0x54c/0xd50 net/netfilter/nf_tables_api.c:1778 Code: e8 d9 9a dd fa 41 83 fc 06 72 0a e8 1e 97 dd fa e9 d7 03 00 00 4d 8d 7e 18 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <8a> 04 08 84 c0 0f 85 76 07 00 00 bb 01 00 00 00 44 89 e1 d3 e3 45 RSP: 0018:ffffc900017e7640 EFLAGS: 00010206 RAX: 0000000000000003 RBX: ffffffff8add4980 RCX: dffffc0000000000 RDX: ffffc9001377d000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffffc900017e7710 R08: ffffffff8698e8c7 R09: ffffffff83b538c7 R10: ffff88808e9ac100 R11: 0000000000000004 R12: 0000000000000000 R13: 1ffff920002fcf00 R14: 0000000000000000 R15: 0000000000000018 FS: 00007fd35735d700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002001d000 CR3: 00000000a073b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nf_tables_addchain net/netfilter/nf_tables_api.c:1899 [inline] nf_tables_newchain+0xec3/0x3ea0 net/netfilter/nf_tables_api.c:2207 nfnetlink_rcv_batch net/netfilter/nfnetlink.c:433 [inline] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:543 [inline] nfnetlink_rcv+0xecf/0x1e50 net/netfilter/nfnetlink.c:561 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x767/0x920 net/netlink/af_netlink.c:1328 netlink_sendmsg+0xa2c/0xd50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg net/socket.c:659 [inline] ____sys_sendmsg+0x4f7/0x7f0 net/socket.c:2330 ___sys_sendmsg net/socket.c:2384 [inline] __sys_sendmsg+0x1ed/0x290 net/socket.c:2417 __do_sys_sendmsg net/socket.c:2426 [inline] __se_sys_sendmsg net/socket.c:2424 [inline] __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2424 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 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:00007fd35735cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fd35735d6d4 RCX: 000000000045b349 RDX: 0000000000000000 RSI: 0000000020003e00 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000917 R14: 00000000004ca810 R15: 000000000075bf2c Modules linked in: ---[ end trace 7de652ae3b0d4c53 ]--- RIP: 0010:nft_chain_parse_hook+0x54c/0xd50 net/netfilter/nf_tables_api.c:1778 Code: e8 d9 9a dd fa 41 83 fc 06 72 0a e8 1e 97 dd fa e9 d7 03 00 00 4d 8d 7e 18 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <8a> 04 08 84 c0 0f 85 76 07 00 00 bb 01 00 00 00 44 89 e1 d3 e3 45 RSP: 0018:ffffc900017e7640 EFLAGS: 00010206 RAX: 0000000000000003 RBX: ffffffff8add4980 RCX: dffffc0000000000 RDX: ffffc9001377d000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffffc900017e7710 R08: ffffffff8698e8c7 R09: ffffffff83b538c7 R10: ffff88808e9ac100 R11: 0000000000000004 R12: 0000000000000000 R13: 1ffff920002fcf00 R14: 0000000000000000 R15: 0000000000000018 FS: 00007fd35735d700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 00000000a073b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400