copy_process+0x3ab7/0x73c0
 kernel_clone+0xea/0x7f0
 __do_sys_clone+0xce/0x120
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Oops: general protection fault, probably for non-canonical address 0xdffffc001fffffff: 0000 [#1] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x00000000fffffff8-0x00000000ffffffff]
CPU: 0 UID: 0 PID: 283 Comm: syz-executor.4 Tainted: G        W           6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:dst_dev_put+0x21/0x250
Code: 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 54 55 53 48 89 fb e8 f0 9a a8 fd 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 b5 01 00 00 48 8d 7b 3a 48 8b 2b 48 b8 00 00 00
RSP: 0018:ffff88806ce08db8 EFLAGS: 00010217
RAX: dffffc0000000000 RBX: 00000000ffffffff RCX: ffffffff841076c7
RDX: 000000001fffffff RSI: ffffffff83cb5bc0 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: fffffbfff0b0a4ac
R13: 0000607f1a63e560 R14: 0000607f1a63e560 R15: 0000000000000000
FS:  00005555683f6400(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000687000 CR3: 000000003f003000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 rt_fibinfo_free_cpus.part.0+0xdb/0x1a0
 fib_nh_common_release+0xa8/0x2c0
 fib6_info_destroy_rcu+0x18b/0x1f0
 rcu_core+0x7c8/0x1800
 handle_softirqs+0x1b1/0x770
 do_softirq+0x48/0x80
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf1/0x110
 kernel_fpu_end+0x5e/0x70
 crc32c+0x2d0/0x350
 ext4_inode_bitmap_csum_set+0x13f/0x270
 ext4_free_inode+0x931/0x13e0
 ext4_evict_inode+0xc0a/0x1740
 evict+0x368/0x860
 iput.part.0+0x541/0x770
 iput+0x62/0x80
 do_unlinkat+0x4fb/0x670
 __x64_sys_unlink+0xc7/0x110
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f359d666457
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 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:00007ffd0bf34778 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f359d666457
RDX: 00007ffd0bf347b0 RSI: 00007ffd0bf347b0 RDI: 00007ffd0bf34840
RBP: 00007ffd0bf34840 R08: 0000000000000001 R09: 00007ffd0bf34610
R10: 00005555683f7c7b R11: 0000000000000206 R12: 00007f359d6c0105
R13: 00007ffd0bf35900 R14: 00005555683f7c20 R15: 00007ffd0bf35940
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dst_dev_put+0x21/0x250
Code: 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 54 55 53 48 89 fb e8 f0 9a a8 fd 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 b5 01 00 00 48 8d 7b 3a 48 8b 2b 48 b8 00 00 00
RSP: 0018:ffff88806ce08db8 EFLAGS: 00010217
RAX: dffffc0000000000 RBX: 00000000ffffffff RCX: ffffffff841076c7
RDX: 000000001fffffff RSI: ffffffff83cb5bc0 RDI: 00000000ffffffff
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: fffffbfff0b0a4ac
R13: 0000607f1a63e560 R14: 0000607f1a63e560 R15: 0000000000000000
FS:  00005555683f6400(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000687000 CR3: 000000003f003000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	f3 0f 1e fa          	endbr64
   d:	41 54                	push   %r12
   f:	55                   	push   %rbp
  10:	53                   	push   %rbx
  11:	48 89 fb             	mov    %rdi,%rbx
  14:	e8 f0 9a a8 fd       	callq  0xfda89b09
  19:	48 89 da             	mov    %rbx,%rdx
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 b5 01 00 00    	jne    0x1e9
  34:	48 8d 7b 3a          	lea    0x3a(%rbx),%rdi
  38:	48 8b 2b             	mov    (%rbx),%rbp
  3b:	48                   	rex.W
  3c:	b8                   	.byte 0xb8
  3d:	00 00                	add    %al,(%rax)