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: 0 PID: 17828 Comm: syz-executor.3 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+0x17f/0x400 arch/x86/lib/csum-partial_64.c:72
Code: 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 5e 30 49 13 5e 38 48 11
RSP: 0018:ffffc90008eff638 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 44423bfb13a9a0c2 RCX: ffffc9000fa69000
RDX: 0000000000040000 RSI: 0000000002c9a8a2 RDI: 0000000000000000
RBP: 00000000ffffffec R08: 0000000000000001 R09: ffff88807269f917
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88807269f8e8
R13: 0000000002c9a8a2 R14: ffff8880bfffcfe8 R15: 0000000000000000
FS:  00007f7f114a7700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880bfffd000 CR3: 0000000071f34000 CR4: 00000000001506f0
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
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2336
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2390
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2423
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e229
Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f7f114a6c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e229
RDX: 0000000000000080 RSI: 0000000020000440 RDI: 0000000000000003
RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffd6298565f R14: 00007f7f114a79c0 R15: 000000000119bf8c
Modules linked in:
CR2: ffff8880bfffd000
---[ end trace fe72397c4544de16 ]---
RIP: 0010:do_csum+0x17f/0x400 arch/x86/lib/csum-partial_64.c:72
Code: 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 5e 30 49 13 5e 38 48 11
RSP: 0018:ffffc90008eff638 EFLAGS: 00010202

RAX: 0000000000000000 RBX: 44423bfb13a9a0c2 RCX: ffffc9000fa69000
RDX: 0000000000040000 RSI: 0000000002c9a8a2 RDI: 0000000000000000
RBP: 00000000ffffffec R08: 0000000000000001 R09: ffff88807269f917
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88807269f8e8
R13: 0000000002c9a8a2 R14: ffff8880bfffcfe8 R15: 0000000000000000
FS:  00007f7f114a7700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880bfffd000 CR3: 0000000071f34000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400