BUG: unable to handle page fault for address: ffff8880bfffd000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 10e01067 P4D 10e01067 PUD 23ffff067 PMD 23fffe067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8674 Comm: syz-executor017 Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_csum+0x177/0x400 arch/x86/lib/csum-partial_64.c:72
Code: 89 ee 44 89 6c 24 04 89 04 24 e8 e4 d6 86 fd 45 85 ed 74 4e 4d 89 e6 e8 47 db 86 fd 41 83 ed 01 31 ff 31 c0 44 89 ee 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
RSP: 0018:ffffc90001a5f420 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 657a734aaa72eaaa RCX: ffffffff83ef5f7b
RDX: ffff888030e43780 RSI: 00000000016ff4c1 RDI: 0000000000000000
RBP: 00000000ffffffec R08: 0000000000000001 R09: ffff88801bfd00d3
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801bfd00b8
R13: 00000000016ff4c1 R14: ffff8880bfffcff8 R15: 0000000000000000
FS:  00007f6b37a3e700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880bfffd000 CR3: 0000000026971000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 csum_partial+0x1c/0x30 arch/x86/lib/csum-partial_64.c:136
 lco_csum include/linux/skbuff.h:4584 [inline]
 gre_checksum include/net/gre.h:114 [inline]
 gre_build_header include/net/gre.h:149 [inline]
 __gre_xmit+0x85b/0x8e0 net/ipv4/ip_gre.c:462
 ipgre_xmit+0x6e7/0x930 net/ipv4/ip_gre.c:648
 __netdev_start_xmit include/linux/netdevice.h:4775 [inline]
 netdev_start_xmit include/linux/netdevice.h:4789 [inline]
 xmit_one net/core/dev.c:3556 [inline]
 dev_hard_start_xmit+0x1eb/0x960 net/core/dev.c:3572
 __dev_queue_xmit+0x2254/0x2ef0 net/core/dev.c:4133
 packet_snd net/packet/af_packet.c:3006 [inline]
 packet_sendmsg+0x23b2/0x52c0 net/packet/af_packet.c:3031
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xd3/0x130 net/socket.c:672
 sock_no_sendpage+0xee/0x130 net/core/sock.c:2846
 kernel_sendpage+0x24b/0x480 net/socket.c:3627
 sock_sendpage+0x8a/0xb0 net/socket.c:945
 pipe_to_sendpage+0x2ad/0x380 fs/splice.c:364
 splice_from_pipe_feed fs/splice.c:418 [inline]
 __splice_from_pipe+0x45e/0x8c0 fs/splice.c:562
 splice_from_pipe fs/splice.c:597 [inline]
 generic_splice_sendpage+0xd4/0x140 fs/splice.c:743
 do_splice_from fs/splice.c:764 [inline]
 do_splice+0xab3/0x1950 fs/splice.c:1059
 __do_splice+0x134/0x250 fs/splice.c:1137
 __do_sys_splice fs/splice.c:1343 [inline]
 __se_sys_splice fs/splice.c:1325 [inline]
 __x64_sys_splice+0x198/0x250 fs/splice.c:1325
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x448dc9
Code: e8 ac 12 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 1b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6b37a3dd88 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000006dec78 RCX: 0000000000448dc9
RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000006dec70 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dec7c
R13: 00316c6e747a7973 R14: 0000000000000000 R15: 0000000030657267
Modules linked in:
CR2: ffff8880bfffd000
---[ end trace e8febaf8cf595a8b ]---
RIP: 0010:do_csum+0x177/0x400 arch/x86/lib/csum-partial_64.c:72
Code: 89 ee 44 89 6c 24 04 89 04 24 e8 e4 d6 86 fd 45 85 ed 74 4e 4d 89 e6 e8 47 db 86 fd 41 83 ed 01 31 ff 31 c0 44 89 ee 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
RSP: 0018:ffffc90001a5f420 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 657a734aaa72eaaa RCX: ffffffff83ef5f7b
RDX: ffff888030e43780 RSI: 00000000016ff4c1 RDI: 0000000000000000
RBP: 00000000ffffffec R08: 0000000000000001 R09: ffff88801bfd00d3
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801bfd00b8
R13: 00000000016ff4c1 R14: ffff8880bfffcff8 R15: 0000000000000000
FS:  00007f6b37a3e700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880bfffd000 CR3: 0000000026971000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400