BUG: unable to handle page fault for address: ffffed105d817dff
#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: 22016 Comm: syz-executor.0 Not tainted 5.4.190-syzkaller-00020-gb9c3a995e377 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:fuse_dev_do_write+0x1f8e/0x49e0 fs/fuse/dev.c:1939
Code: 48 89 d8 48 c1 e8 03 48 bd 00 00 00 00 00 fc ff df 8a 04 28 84 c0 0f 85 ea 25 00 00 8b 1b ff cb 4c 01 f3 48 89 d8 48 c1 e8 03 <8a> 04 28 84 c0 0f 85 ee 25 00 00 c6 03 00 41 80 3c 2f 00 74 08 4c
RSP: 0018:ffff8881e3807bd0 EFLAGS: 00010a07
RAX: 1ffff1105d817dff RBX: ffff8882ec0befff RCX: 0000000000040000
RDX: ffffc90000144000 RSI: 000000000000004c RDI: ffff8881c17c7e20
RBP: dffffc0000000000 R08: ffffffff81d12fb8 R09: fffff94000d8e037
R10: fffff94000d8e037 R11: 1ffffd4000d8e036 R12: ffff8881f2df9000
R13: ffff8881f2df9020 R14: ffff8881ec0bf000 R15: 1ffff1103e5bf204
FS:  00007f839d3d9700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed105d817dff CR3: 00000001ead53000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fuse_dev_write+0xff/0x160 fs/fuse/dev.c:1976
 call_write_iter include/linux/fs.h:1976 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0x4f9/0x6a0 fs/read_write.c:496
 vfs_write+0x210/0x4f0 fs/read_write.c:558
 ksys_write+0x158/0x260 fs/read_write.c:611
 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f839e263109
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f839d3d9168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f839e375f60 RCX: 00007f839e263109
RDX: 0000000000000010 RSI: 0000000020002040 RDI: 0000000000000003
RBP: 00007f839e2bd0ad R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff6c65681f R14: 00007f839d3d9300 R15: 0000000000022000
Modules linked in:
CR2: ffffed105d817dff
---[ end trace 90296195f5d1f98e ]---
RIP: 0010:fuse_dev_do_write+0x1f8e/0x49e0 fs/fuse/dev.c:1939
Code: 48 89 d8 48 c1 e8 03 48 bd 00 00 00 00 00 fc ff df 8a 04 28 84 c0 0f 85 ea 25 00 00 8b 1b ff cb 4c 01 f3 48 89 d8 48 c1 e8 03 <8a> 04 28 84 c0 0f 85 ee 25 00 00 c6 03 00 41 80 3c 2f 00 74 08 4c
RSP: 0018:ffff8881e3807bd0 EFLAGS: 00010a07
RAX: 1ffff1105d817dff RBX: ffff8882ec0befff RCX: 0000000000040000
RDX: ffffc90000144000 RSI: 000000000000004c RDI: ffff8881c17c7e20
RBP: dffffc0000000000 R08: ffffffff81d12fb8 R09: fffff94000d8e037
R10: fffff94000d8e037 R11: 1ffffd4000d8e036 R12: ffff8881f2df9000
R13: ffff8881f2df9020 R14: ffff8881ec0bf000 R15: 1ffff1103e5bf204
FS:  00007f839d3d9700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed105d817dff CR3: 00000001ead53000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 89 d8             	mov    %rbx,%rax
   3:	48 c1 e8 03          	shr    $0x3,%rax
   7:	48 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbp
   e:	fc ff df
  11:	8a 04 28             	mov    (%rax,%rbp,1),%al
  14:	84 c0                	test   %al,%al
  16:	0f 85 ea 25 00 00    	jne    0x2606
  1c:	8b 1b                	mov    (%rbx),%ebx
  1e:	ff cb                	dec    %ebx
  20:	4c 01 f3             	add    %r14,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	8a 04 28             	mov    (%rax,%rbp,1),%al <-- trapping instruction
  2d:	84 c0                	test   %al,%al
  2f:	0f 85 ee 25 00 00    	jne    0x2623
  35:	c6 03 00             	movb   $0x0,(%rbx)
  38:	41 80 3c 2f 00       	cmpb   $0x0,(%r15,%rbp,1)
  3d:	74 08                	je     0x47
  3f:	4c                   	rex.WR