BUG: unable to handle page fault for address: ffff8880bfffd000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD f601067 P4D f601067 PUD 23ffff067 PMD 23fffe067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 10134 Comm: syz-executor.5 Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:do_csum+0xe4/0x2e0 arch/x86/lib/csum-partial_64.c:72
Code: 01 c3 44 89 e1 41 c1 ec 04 d1 e9 45 85 e4 0f 84 c7 01 00 00 41 8d 44 24 ff 31 d2 48 83 c0 01 48 c1 e0 06 48 01 e8 48 03 5d 00 <48> 13 5d 08 48 13 5d 10 48 13 5d 18 48 13 5d 20 48 13 5d 28 48 13
RSP: 0018:ffffc9000ae4f420 EFLAGS: 00010202
RAX: ffff8881a76d3078 RBX: 49e667d282206ff1 RCX: 000000001ffffffd
RDX: 0000000000000000 RSI: ffffffffffffffec RDI: ffff8880a76d30b8
RBP: ffff8880bfffcff8 R08: 0000000000000100 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000003ffffff
R13: 0000000000000000 R14: ffff8880a76d30b8 R15: ffff8880a76d30a4
FS:  00007f13ca725700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880bfffd000 CR3: 00000000a3809000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 csum_partial+0x8/0x10 arch/x86/lib/csum-partial_64.c:136
 lco_csum include/linux/skbuff.h:4571 [inline]
 gre_checksum include/net/gre.h:114 [inline]
 gre_build_header include/net/gre.h:149 [inline]
 __gre_xmit+0x78f/0x8c0 net/ipv4/ip_gre.c:462
 ipgre_xmit+0x62e/0x8b0 net/ipv4/ip_gre.c:648
 __netdev_start_xmit include/linux/netdevice.h:4681 [inline]
 netdev_start_xmit include/linux/netdevice.h:4695 [inline]
 xmit_one net/core/dev.c:3561 [inline]
 dev_hard_start_xmit+0x156/0x750 net/core/dev.c:3577
 __dev_queue_xmit+0x1c28/0x2a10 net/core/dev.c:4136
 packet_snd net/packet/af_packet.c:2989 [inline]
 packet_sendmsg+0x2f5f/0x5060 net/packet/af_packet.c:3014
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xac/0xf0 net/socket.c:671
 sock_no_sendpage+0xeb/0x130 net/core/sock.c:2847
 kernel_sendpage+0x208/0x3b0 net/socket.c:3644
 sock_sendpage+0x6e/0xd0 net/socket.c:944
 pipe_to_sendpage+0x247/0x410 fs/splice.c:448
 splice_from_pipe_feed fs/splice.c:502 [inline]
 __splice_from_pipe+0x296/0x750 fs/splice.c:646
 splice_from_pipe+0xad/0x100 fs/splice.c:681
 do_splice+0x85d/0x1440 fs/splice.c:1164
 __do_sys_splice fs/splice.c:1439 [inline]
 __se_sys_splice fs/splice.c:1421 [inline]
 __x64_sys_splice+0x14e/0x200 fs/splice.c:1421
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4665d9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f13ca725188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665d9
RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000004bfcb9 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007ffcbc050aff R14: 00007f13ca725300 R15: 0000000000022000
Modules linked in:
CR2: ffff8880bfffd000
---[ end trace 460f070396b291f4 ]---
RIP: 0010:do_csum+0xe4/0x2e0 arch/x86/lib/csum-partial_64.c:72
Code: 01 c3 44 89 e1 41 c1 ec 04 d1 e9 45 85 e4 0f 84 c7 01 00 00 41 8d 44 24 ff 31 d2 48 83 c0 01 48 c1 e0 06 48 01 e8 48 03 5d 00 <48> 13 5d 08 48 13 5d 10 48 13 5d 18 48 13 5d 20 48 13 5d 28 48 13
RSP: 0018:ffffc9000ae4f420 EFLAGS: 00010202
RAX: ffff8881a76d3078 RBX: 49e667d282206ff1 RCX: 000000001ffffffd
RDX: 0000000000000000 RSI: ffffffffffffffec RDI: ffff8880a76d30b8
RBP: ffff8880bfffcff8 R08: 0000000000000100 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000003ffffff
R13: 0000000000000000 R14: ffff8880a76d30b8 R15: ffff8880a76d30a4
FS:  00007f13ca725700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880bfffd000 CR3: 00000000a3809000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400