RFLAGS=0x00000002 DR7 = 0x0000000000000400 kasan: CONFIG_KASAN_INLINE enabled Sysenter RSP=0000000000000f80 CS:RIP=0050:0000000000002810 kasan: GPF could be caused by NULL-ptr deref or user memory access CS: sel=0x0000, attr=0x08081, limit=0x00000000, base=0x0000000000000000 general protection fault: 0000 [#1] PREEMPT SMP KASAN DS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 Modules linked in: CPU: 1 PID: 24443 Comm: syz-executor.5 Not tainted 4.14.175-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a78c44c0 task.stack: ffff88804ec90000 RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline] RIP: 0010:__nf_nat_l4proto_find net/netfilter/nf_nat_core.c:54 [inline] RIP: 0010:get_unique_tuple+0x230/0x19e0 net/netfilter/nf_nat_core.c:313 SS: sel=0x0000, attr=0x00085, limit=0x00000000, base=0x0000000000000000 RSP: 0018:ffff88804ec96f18 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff88804ec97090 RCX: 1ffffffff1126045 RDX: 0000000000000000 RSI: ffffffff8526c6d2 RDI: ffffffff88930228 RBP: ffff88804ec97040 R08: 0000000000000000 R09: 0000000000020012 R10: ffff8880a78c4d90 R11: ffff8880a78c44c0 R12: 0000000000000000 R13: 00000000000000d1 R14: ffff88804ec970b6 R15: ffff88804ec970e0 FS: 00007f450b38a700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000b70004 CR3: 0000000049c80000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ES: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 Call Trace: nf_nat_setup_info+0x17b/0x710 net/netfilter/nf_nat_core.c:407 FS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 GS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 GDTR: limit=0x00000000, base=0x0000000000000000 LDTR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 IDTR: limit=0x00000000, base=0x0000000000000000 __nf_nat_alloc_null_binding+0x13f/0x180 net/netfilter/nf_nat_core.c:466 nfnetlink_parse_nat_setup+0x30c/0x370 net/netfilter/nf_nat_core.c:782 TR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 ctnetlink_parse_nat_setup+0x70/0x490 net/netfilter/nf_conntrack_netlink.c:1421 EFER = 0x0000000000000000 PAT = 0x0007040600070406 ctnetlink_setup_nat net/netfilter/nf_conntrack_netlink.c:1491 [inline] ctnetlink_create_conntrack+0x437/0x1040 net/netfilter/nf_conntrack_netlink.c:1840 ctnetlink_new_conntrack+0x460/0xc30 net/netfilter/nf_conntrack_netlink.c:1964 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 nfnetlink_rcv_msg+0xa08/0xc00 net/netfilter/nfnetlink.c:214 Interruptibility = 00000000 ActivityState = 00000000 netlink_rcv_skb+0x127/0x370 net/netlink/af_netlink.c:2433 *** Host State *** nfnetlink_rcv+0x1ab/0x1650 net/netfilter/nfnetlink.c:515 RIP = 0xffffffff8116f8df RSP = 0xffff8880882a79b0 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007fc7d845b700 GSBase=ffff8880aea00000 TRBase=fffffe0000003000 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x437/0x620 net/netlink/af_netlink.c:1313 GDTBase=fffffe0000001000 IDTBase=fffffe0000000000 netlink_sendmsg+0x733/0xbe0 net/netlink/af_netlink.c:1878 CR0=0000000080050033 CR3=00000000361b0000 CR4=00000000001426f0 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xc5/0x100 net/socket.c:656 Sysenter RSP=fffffe0000002200 CS:RIP=0010:ffffffff866018a0 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062 EFER = 0x0000000000000d01 PAT = 0x0407050600070106 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 *** Control State *** PinBased=0000003f CPUBased=b699edfa SecondaryExec=000000ea SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 EntryControls=0000d1ff ExitControls=002fefff RIP: 0033:0x45c889 RSP: 002b:00007f450b389c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f450b38a6d4 RCX: 000000000045c889 RDX: 0000000000000000 RSI: 0000000020000640 RDI: 0000000000000003 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000095c R14: 00000000004cc13b R15: 000000000076bf0c Code: 48 c1 VMEntry: intr_info=00000000 errcode=00000000 ilen=00000000 e9 03 80 3c 11 00 0f 85 91 14 00 VMExit: intr_info=00000000 errcode=00000000 ilen=00000001 00 4a 8b 14 e5 a0 fb 92 88 4c 8d 24 c2 48 b8 00 00 00 00 00 reason=80000021 qualification=0000000000000000 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 81 14 00 00 49 8b 04 24 IDTVectoring: info=00000000 errcode=00000000 48 89 85 30 ff ff ff RIP: __read_once_size include/linux/compiler.h:183 [inline] RSP: ffff88804ec96f18 RIP: __nf_nat_l4proto_find net/netfilter/nf_nat_core.c:54 [inline] RSP: ffff88804ec96f18 RIP: get_unique_tuple+0x230/0x19e0 net/netfilter/nf_nat_core.c:313 RSP: ffff88804ec96f18 ---[ end trace 201f3428d39c0e79 ]--- audit: type=1800 audit(1586439676.656:137): pid=24453 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="file0" dev="sda1" ino=16388 res=0