Oops: general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
CPU: 0 UID: 0 PID: 1031 Comm: syz.1.255 Not tainted 6.12.38-syzkaller-gc46482c03ae9 #0 80b02ff89b1607ee1d115e0157270f38c0251e02
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:fuse_file_release+0x29e/0x400 fs/fuse/file.c:388
Code: 00 74 12 48 89 df e8 81 f9 a0 ff 48 ba 00 00 00 00 00 fc ff df 4c 89 2b 4c 8b 75 b8 49 81 c7 c8 00 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 ff e8 34 f8 a0 ff 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc9000f4b7d00 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 0000000000000000 RCX: 0000000000080000
RDX: dffffc0000000000 RSI: 00000000000000ad RDI: 00000000000000ae
RBP: ffffc9000f4b7d48 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001e96f70 R12: 0000000000028c01
R13: ffff88812ec9f600 R14: ffff888119ff2f00 R15: 00000000000000c8
FS:  00007fbf648b76c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbf64896d58 CR3: 0000000120c7c000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000000000508c
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 fuse_release_common fs/fuse/file.c:393 [inline]
 fuse_release+0x13e/0x1b0 fs/fuse/file.c:408
 __fput+0x1fe/0xa00 fs/file_table.c:429
 ____fput+0x20/0x30 fs/file_table.c:457
 task_work_run+0x1e0/0x250 kernel/task_work.c:240
 resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x64/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fbf6398ebe9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbf648b7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000124
RAX: 0000000000000006 RBX: 00007fbf63bb5fa0 RCX: 00007fbf6398ebe9
RDX: 6700000000000000 RSI: 0000000000000006 RDI: 0000000000000004
RBP: 00007fbf63a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbf63bb6038 R14: 00007fbf63bb5fa0 R15: 00007fff66ea5728
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fuse_file_release+0x29e/0x400 fs/fuse/file.c:388
Code: 00 74 12 48 89 df e8 81 f9 a0 ff 48 ba 00 00 00 00 00 fc ff df 4c 89 2b 4c 8b 75 b8 49 81 c7 c8 00 00 00 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 ff e8 34 f8 a0 ff 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc9000f4b7d00 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 0000000000000000 RCX: 0000000000080000
RDX: dffffc0000000000 RSI: 00000000000000ad RDI: 00000000000000ae
RBP: ffffc9000f4b7d48 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001e96f70 R12: 0000000000028c01
R13: ffff88812ec9f600 R14: ffff888119ff2f00 R15: 00000000000000c8
FS:  00007fbf648b76c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c1a9b3ff0 CR3: 0000000120c7c000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 000000000000508c
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 74 12 48          	add    %dh,0x48(%rdx,%rdx,1)
   4:	89 df                	mov    %ebx,%edi
   6:	e8 81 f9 a0 ff       	call   0xffa0f98c
   b:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  12:	fc ff df
  15:	4c 89 2b             	mov    %r13,(%rbx)
  18:	4c 8b 75 b8          	mov    -0x48(%rbp),%r14
  1c:	49 81 c7 c8 00 00 00 	add    $0xc8,%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 10 00          	cmpb   $0x0,(%rax,%rdx,1) <-- trapping instruction
  2e:	74 12                	je     0x42
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 34 f8 a0 ff       	call   0xffa0f86c
  38:	48                   	rex.W
  39:	ba 00 00 00 00       	mov    $0x0,%edx
  3e:	00 fc                	add    %bh,%ah