BUG: unable to handle page fault for address: ffffed105c6c61ff
#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: 5206 Comm: syz-executor.1 Not tainted 5.4.233-syzkaller-00019-gd5ed2ca98e48 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:fuse_dev_do_write+0x21f0/0x4e00 fs/fuse/dev.c:1939
Code: 8e b8 ff 4d 8b 3f 4c 89 e0 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 cc 26 00 00 45 8b 24 24 41 ff cc 4d 01 fc 4c 89 e0 48 c1 e8 03 <0f> b6 04 18 84 c0 0f 85 cd 26 00 00 41 c6 04 24 00 41 80 3c 1e 00
RSP: 0018:ffff8881ecd8f7e0 EFLAGS: 00010a07
RAX: 1ffff1105c6c61ff RBX: dffffc0000000000 RCX: 0000000000040000
RDX: ffffc9000134d000 RSI: 000000000000004d RDI: 000000000000004e
RBP: ffff8881ecd8fb30 R08: ffffffff81d83310 R09: fffff94000c98e07
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8882e3630fff
R13: 0000000000000010 R14: 1ffff1103de52238 R15: ffff8881e3631000
FS:  00007f3498c87700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed105c6c61ff CR3: 0000000182fe5000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fuse_dev_write+0x15b/0x1e0 fs/fuse/dev.c:1976
 call_write_iter include/linux/fs.h:1981 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0x5d3/0x750 fs/read_write.c:496
 vfs_write+0x206/0x4e0 fs/read_write.c:558
 ksys_write+0x199/0x2c0 fs/read_write.c:611
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Modules linked in:
CR2: ffffed105c6c61ff
---[ end trace 187c8059edcccd05 ]---
RIP: 0010:fuse_dev_do_write+0x21f0/0x4e00 fs/fuse/dev.c:1939
Code: 8e b8 ff 4d 8b 3f 4c 89 e0 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 cc 26 00 00 45 8b 24 24 41 ff cc 4d 01 fc 4c 89 e0 48 c1 e8 03 <0f> b6 04 18 84 c0 0f 85 cd 26 00 00 41 c6 04 24 00 41 80 3c 1e 00
RSP: 0018:ffff8881ecd8f7e0 EFLAGS: 00010a07
RAX: 1ffff1105c6c61ff RBX: dffffc0000000000 RCX: 0000000000040000
RDX: ffffc9000134d000 RSI: 000000000000004d RDI: 000000000000004e
RBP: ffff8881ecd8fb30 R08: ffffffff81d83310 R09: fffff94000c98e07
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8882e3630fff
R13: 0000000000000010 R14: 1ffff1103de52238 R15: ffff8881e3631000
FS:  00007f3498c87700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed105c6c61ff CR3: 0000000182fe5000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	8e b8 ff 4d 8b 3f    	mov    0x3f8b4dff(%rax),%?
   6:	4c 89 e0             	mov    %r12,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	0f b6 04 18          	movzbl (%rax,%rbx,1),%eax
  11:	84 c0                	test   %al,%al
  13:	0f 85 cc 26 00 00    	jne    0x26e5
  19:	45 8b 24 24          	mov    (%r12),%r12d
  1d:	41 ff cc             	dec    %r12d
  20:	4d 01 fc             	add    %r15,%r12
  23:	4c 89 e0             	mov    %r12,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	0f b6 04 18          	movzbl (%rax,%rbx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 cd 26 00 00    	jne    0x2703
  36:	41 c6 04 24 00       	movb   $0x0,(%r12)
  3b:	41 80 3c 1e 00       	cmpb   $0x0,(%r14,%rbx,1)