BUG: unable to handle page fault for address: ffff8880bfffd000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 10c01067 P4D 10c01067 PUD 23ffff067 PMD 23fffe067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8623 Comm: syz-executor908 Not tainted 5.13.0-rc7-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 d4 d6 87 fd 45 85 ed 74 4e 4d 89 e6 e8 17 cf 87 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:ffffc90001a3f410 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 7c762b0edd49a2d2 RCX: 0000000000000000
RDX: ffff888016789c40 RSI: 0000000001bbc461 RDI: 0000000000000000
RBP: 00000000ffffffec R08: 0000000000000000 R09: 0000000000000060
R10: ffffffff83ed0cfb R11: 0000000000000060 R12: ffff88802ef0e8b8
R13: 0000000001bbc461 R14: ffff8880bfffcff8 R15: 0000000000000000
FS:  00007f71f3c47700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880bfffd000 CR3: 0000000027be7000 CR4: 0000000000350ef0
Call Trace:
 csum_partial+0x1c/0x30 arch/x86/lib/csum-partial_64.c:136
 lco_csum include/linux/skbuff.h:4649 [inline]
 gre_build_header include/net/gre.h:139 [inline]
 __gre_xmit+0x879/0x970 net/ipv4/ip_gre.c:462
 ipgre_xmit+0x679/0x830 net/ipv4/ip_gre.c:648
 __netdev_start_xmit include/linux/netdevice.h:4944 [inline]
 netdev_start_xmit include/linux/netdevice.h:4958 [inline]
 xmit_one net/core/dev.c:3654 [inline]
 dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3670
 __dev_queue_xmit+0x2133/0x3130 net/core/dev.c:4246
 packet_snd net/packet/af_packet.c:3015 [inline]
 packet_sendmsg+0x22ee/0x5310 net/packet/af_packet.c:3043
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:674
 sock_no_sendpage+0xf3/0x130 net/core/sock.c:2862
 kernel_sendpage.part.0+0x1ab/0x350 net/socket.c:3618
 kernel_sendpage net/socket.c:3615 [inline]
 sock_sendpage+0xe5/0x140 net/socket.c:947
 pipe_to_sendpage+0x2ad/0x380 fs/splice.c:364
 splice_from_pipe_feed fs/splice.c:418 [inline]
 __splice_from_pipe+0x43e/0x8a0 fs/splice.c:562
 splice_from_pipe fs/splice.c:597 [inline]
 generic_splice_sendpage+0xd4/0x140 fs/splice.c:746
 do_splice_from fs/splice.c:767 [inline]
 do_splice+0xb7e/0x1940 fs/splice.c:1079
 __do_splice+0x134/0x250 fs/splice.c:1144
 __do_sys_splice fs/splice.c:1350 [inline]
 __se_sys_splice fs/splice.c:1332 [inline]
 __x64_sys_splice+0x198/0x250 fs/splice.c:1332
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x449009
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f71f3c472e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00000000004cf510 RCX: 0000000000449009
RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000004cf51c R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049e004
R13: 78902f0000000000 R14: 6d32cc5e8ead0600 R15: 00000000004cf518
Modules linked in:
CR2: ffff8880bfffd000
---[ end trace e5a75b5c3c112f40 ]---
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 d4 d6 87 fd 45 85 ed 74 4e 4d 89 e6 e8 17 cf 87 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:ffffc90001a3f410 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 7c762b0edd49a2d2 RCX: 0000000000000000
RDX: ffff888016789c40 RSI: 0000000001bbc461 RDI: 0000000000000000
RBP: 00000000ffffffec R08: 0000000000000000 R09: 0000000000000060
R10: ffffffff83ed0cfb R11: 0000000000000060 R12: ffff88802ef0e8b8
R13: 0000000001bbc461 R14: ffff8880bfffcff8 R15: 0000000000000000
FS:  00007f71f3c47700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880bfffd000 CR3: 0000000027be7000 CR4: 0000000000350ef0