BUG: unable to handle page fault for address: ffff8880bfffd000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD c401067 P4D c401067 PUD 21ffff067 PMD 21fffe067 PTE 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 10476 Comm: syz-executor691 Not tainted 5.5.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:do_csum+0x19f/0x420 arch/x86/lib/csum-partial_64.c:72 Code: 47 1c a4 f9 41 83 ef 01 31 ff 31 c0 44 89 fe 49 03 1e 49 13 5e 08 49 13 5e 10 49 13 5e 18 49 13 5e 20 49 13 5e 28 49 13 5e 30 <49> 13 5e 38 48 11 c3 e8 95 1d a4 f9 49 83 c6 40 45 85 ff 75 c0 8b RSP: 0018:ffffc90000007650 EFLAGS: 00010286 RAX: 0000000000000000 RBX: d6fa8de1f9b24418 RCX: ffffffff87d0db4b RDX: 0000000000000100 RSI: 000000000343037f RDI: 0000000000000000 RBP: ffffc90000007688 R08: ffff8880a2eaa180 R09: fffff940004ed847 R10: fffff940004ed846 R11: ffffea000276c237 R12: 00000000ffffff38 R13: ffff888090c0b0c8 R14: ffff8880bfffcfc8 R15: 000000000343037f FS: 00000000023e9880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8880bfffd000 CR3: 000000008bd33000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: csum_partial+0x21/0x30 arch/x86/lib/csum-partial_64.c:136 gso_make_checksum include/linux/skbuff.h:4387 [inline] __udp_gso_segment+0x7fa/0x1140 net/ipv4/udp_offload.c:252 udp4_ufo_fragment net/ipv4/udp_offload.c:311 [inline] udp4_ufo_fragment+0x55f/0x770 net/ipv4/udp_offload.c:288 inet_gso_segment+0x53c/0x1170 net/ipv4/af_inet.c:1348 skb_mac_gso_segment+0x295/0x590 net/core/dev.c:3177 __skb_gso_segment+0x363/0x730 net/core/dev.c:3250 udp_rcv_segment include/net/udp.h:482 [inline] udp_queue_rcv_skb net/ipv4/udp.c:2106 [inline] udp_queue_rcv_skb+0x2b2/0x790 net/ipv4/udp.c:2096 __udp4_lib_mcast_deliver net/ipv4/udp.c:2193 [inline] __udp4_lib_rcv+0x20bc/0x2d20 net/ipv4/udp.c:2323 udp_rcv+0x22/0x30 net/ipv4/udp.c:2498 ip_protocol_deliver_rcu+0x5a/0x880 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x23b/0x380 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x1e9/0x520 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0x1db/0x2f0 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0xe8/0x3f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:5150 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5264 process_backlog+0x206/0x750 net/core/dev.c:6095 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x508/0x1120 net/core/dev.c:6600 __do_softirq+0x262/0x98c kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:337 do_softirq+0x18/0x20 kernel/softirq.c:325 netif_rx_ni+0x3ea/0x670 net/core/dev.c:4708 dev_loopback_xmit+0x285/0x750 net/core/dev.c:3728 ip_mc_finish_output+0x16e/0x4a0 net/ipv4/ip_output.c:357 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip_mc_output+0x5d8/0xf60 net/ipv4/ip_output.c:396 dst_output include/net/dst.h:436 [inline] ip_local_out+0xbb/0x1b0 net/ipv4/ip_output.c:125 ip_send_skb+0x42/0xf0 net/ipv4/ip_output.c:1562 udp_send_skb.isra.0+0x6d5/0x11b0 net/ipv4/udp.c:891 udp_sendmsg+0x1e8f/0x2810 net/ipv4/udp.c:1178 udpv6_sendmsg+0x14c7/0x2b40 net/ipv6/udp.c:1284 inet6_sendmsg+0x9e/0xe0 net/ipv6/af_inet6.c:576 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:659 __sys_sendto+0x262/0x380 net/socket.c:1985 __do_sys_sendto net/socket.c:1997 [inline] __se_sys_sendto net/socket.c:1993 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1993 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4426a9 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fffcefc1d28 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004426a9 RDX: 0000000000000401 RSI: 0000000020000600 RDI: 0000000000000003 RBP: 00007fffcefc1d50 R08: 00000000200011c0 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000403c40 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: ffff8880bfffd000 ---[ end trace 06a7fe4da75fa840 ]--- RIP: 0010:do_csum+0x19f/0x420 arch/x86/lib/csum-partial_64.c:72 Code: 47 1c a4 f9 41 83 ef 01 31 ff 31 c0 44 89 fe 49 03 1e 49 13 5e 08 49 13 5e 10 49 13 5e 18 49 13 5e 20 49 13 5e 28 49 13 5e 30 <49> 13 5e 38 48 11 c3 e8 95 1d a4 f9 49 83 c6 40 45 85 ff 75 c0 8b RSP: 0018:ffffc90000007650 EFLAGS: 00010286 RAX: 0000000000000000 RBX: d6fa8de1f9b24418 RCX: ffffffff87d0db4b RDX: 0000000000000100 RSI: 000000000343037f RDI: 0000000000000000 RBP: ffffc90000007688 R08: ffff8880a2eaa180 R09: fffff940004ed847 R10: fffff940004ed846 R11: ffffea000276c237 R12: 00000000ffffff38 R13: ffff888090c0b0c8 R14: ffff8880bfffcfc8 R15: 000000000343037f FS: 00000000023e9880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8880bfffd000 CR3: 000000008bd33000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400