Oops: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
CPU: 1 UID: 0 PID: 17821 Comm: syz-executor.2 Not tainted 6.18.0-rc7-next-20251128 #1 PREEMPT(voluntary) 
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:__fput+0x1cc/0xb50
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f6 08 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 7e 68 49 8d 7f 28 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 c9 08 00 00 48 ba 00 00 00 00 00 fc ff df 49 8b
RSP: 0018:ffff888050417e08 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: ffff88801a68f300 RCX: ffffc900029f6000
RDX: 0000000000000005 RSI: ffffffff81b955f2 RDI: 0000000000000028
RBP: ffff888016003dc0 R08: 0000000000000000 R09: ffffed100a082fd4
R10: 0000000004000000 R11: 0000000000000001 R12: ffff888016003e00
R13: 0000000000000010 R14: ffff88801a2a0000 R15: 0000000000000000
FS:  00007f9f9e42c700(0000) GS:ffff8880e5468000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9f9e40b718 CR3: 000000000d09c000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 fput_close_sync+0x10f/0x230
 __x64_sys_close+0x8f/0x120
 do_syscall_64+0xbf/0x420
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9fa0eb6b19
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:00007f9f9e42c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007f9fa0fc9f60 RCX: 00007f9fa0eb6b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f9fa0f10f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe4a3b430f R14: 00007f9f9e42c300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__fput+0x1cc/0xb50
Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f6 08 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 7e 68 49 8d 7f 28 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 c9 08 00 00 48 ba 00 00 00 00 00 fc ff df 49 8b
RSP: 0018:ffff888050417e08 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: ffff88801a68f300 RCX: ffffc900029f6000
RDX: 0000000000000005 RSI: ffffffff81b955f2 RDI: 0000000000000028
RBP: ffff888016003dc0 R08: 0000000000000000 R09: ffffed100a082fd4
R10: 0000000004000000 R11: 0000000000000001 R12: ffff888016003e00
R13: 0000000000000010 R14: ffff88801a2a0000 R15: 0000000000000000
FS:  00007f9f9e42c700(0000) GS:ffff8880e5468000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9f9e40b718 CR3: 000000000d09c000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	48 89 fa             	mov    %rdi,%rdx
   3:	48 c1 ea 03          	shr    $0x3,%rdx
   7:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   b:	0f 85 f6 08 00 00    	jne    0x907
  11:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  18:	fc ff df
  1b:	4d 8b 7e 68          	mov    0x68(%r14),%r15
  1f:	49 8d 7f 28          	lea    0x28(%r15),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 c9 08 00 00    	jne    0x8fd
  34:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  3b:	fc ff df
  3e:	49                   	rex.WB
  3f:	8b                   	.byte 0x8b