BUG: unable to handle page fault for address: ffffed105c2295ff
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23fff3067 P4D 23fff3067 PUD 23fff1067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 447 Comm: syz-executor.0 Not tainted 5.4.125-syzkaller-00028-g73e6d86c30ee #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:fuse_dev_do_write+0x5495/0x74e0 fs/fuse/dev.c:1913
Code: 89 d8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 8a 04 20 84 c0 0f 85 0c 1d 00 00 8b 1b ff cb 4c 01 fb 48 89 d8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 0f 1d 00 00 c6 03 00 48 8b 84 24 88 00 00
RSP: 0018:ffff8881de8577e0 EFLAGS: 00010a07
RAX: 1ffff1105c2295ff RBX: ffff8882e114afff RCX: dffffc0000000000
RDX: ffffc90000144000 RSI: 0000000000000042 RDI: ffff8881e27b7d50
RBP: ffff8881de857b30 R08: ffffffff81ddb249 R09: fffff94000d38547
R10: fffff94000d38547 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000010 R14: ffff8881dcda9a98 R15: ffff8881e114b000
FS:  00007f4d949bf700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed105c2295ff CR3: 00000001a6145000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fuse_dev_write+0x16e/0x1f0 fs/fuse/dev.c:1950
 call_write_iter include/linux/fs.h:1976 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0x5ec/0x780 fs/read_write.c:496
 vfs_write+0x212/0x4e0 fs/read_write.c:558
 ksys_write+0x186/0x2b0 fs/read_write.c:611
 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f4d96c48a39
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:00007f4d949bf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f4d96d4bf60 RCX: 00007f4d96c48a39
RDX: 0000000000000010 RSI: 00000000200042c0 RDI: 0000000000000003
RBP: 00007f4d96ca2c5f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff6f3df22f R14: 00007f4d949bf300 R15: 0000000000022000
Modules linked in:
CR2: ffffed105c2295ff
---[ end trace a75099dd3d08e361 ]---
RIP: 0010:fuse_dev_do_write+0x5495/0x74e0 fs/fuse/dev.c:1913
Code: 89 d8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 8a 04 20 84 c0 0f 85 0c 1d 00 00 8b 1b ff cb 4c 01 fb 48 89 d8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 0f 1d 00 00 c6 03 00 48 8b 84 24 88 00 00
RSP: 0018:ffff8881de8577e0 EFLAGS: 00010a07
RAX: 1ffff1105c2295ff RBX: ffff8882e114afff RCX: dffffc0000000000
RDX: ffffc90000144000 RSI: 0000000000000042 RDI: ffff8881e27b7d50
RBP: ffff8881de857b30 R08: ffffffff81ddb249 R09: fffff94000d38547
R10: fffff94000d38547 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000010 R14: ffff8881dcda9a98 R15: ffff8881e114b000
FS:  00007f4d949bf700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed105c2295ff CR3: 00000001a6145000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	89 d8                	mov    %ebx,%eax
   2:	48 c1 e8 03          	shr    $0x3,%rax
   6:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
   d:	fc ff df
  10:	42 8a 04 20          	mov    (%rax,%r12,1),%al
  14:	84 c0                	test   %al,%al
  16:	0f 85 0c 1d 00 00    	jne    0x1d28
  1c:	8b 1b                	mov    (%rbx),%ebx
  1e:	ff cb                	dec    %ebx
  20:	4c 01 fb             	add    %r15,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 8a 04 20          	mov    (%rax,%r12,1),%al <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 0f 1d 00 00    	jne    0x1d45
  36:	c6 03 00             	movb   $0x0,(%rbx)
  39:	48                   	rex.W
  3a:	8b                   	.byte 0x8b
  3b:	84 24 88             	test   %ah,(%rax,%rcx,4)