BUG: kernel NULL pointer dereference, address: 0000000000000008
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 
P4D 0 
Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 UID: 0 PID: 6659 Comm: sed Not tainted 6.14.0-rc6-syzkaller-g80e54e84911a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:qlink_to_cache mm/kasan/quarantine.c:131 [inline]
RIP: 0010:qlist_free_all+0x69/0x140 mm/kasan/quarantine.c:176
Code: e8 06 48 83 e0 c0 49 8b 4c 05 08 f6 c1 01 0f 85 a8 00 00 00 4c 01 e8 66 90 0f b6 48 33 c1 e1 18 81 f9 00 00 00 f5 48 0f 45 c5 <48> 8b 58 08 4d 8b 34 24 48 63 83 c0 00 00 00 49 29 c4 48 89 df 4c
RSP: 0018:ffffc90003027aa0 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000ff000000
RDX: 0000000000000000 RSI: 000000001a68ef80 RDI: 000000001fffffff
RBP: 0000000000000000 R08: ffffffff816eccb5 R09: 1ffffffff28a290e
R10: dffffc0000000000 R11: fffffbfff28a290f R12: ffffffff9a68ef80
R13: ffffea0000000000 R14: ffffffff9a68ef80 R15: 0000000000000000
FS:  00007f60a6fa7380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 000000005cb38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171
 vm_area_alloc+0x24/0x1d0 kernel/fork.c:472
 do_brk_flags+0x42c/0xd90 mm/vma.c:2600
 __do_sys_brk mm/mmap.c:197 [inline]
 __se_sys_brk+0xa38/0xec0 mm/mmap.c:115
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f60a70ffc7c
Code: 1a 64 c7 03 01 00 00 00 eb 11 64 44 89 23 31 f6 5b 31 ff 5d 41 5c e9 41 ff ff ff 5b 83 c8 ff 5d 41 5c c3 b8 0c 00 00 00 0f 05 <48> 8b 15 d5 61 0d 00 45 31 c0 48 89 02 48 39 c7 76 12 48 8b 05 73
RSP: 002b:00007fff08034388 EFLAGS: 00000206 ORIG_RAX: 000000000000000c
RAX: ffffffffffffffda RBX: 0000000000021000 RCX: 00007f60a70ffc7c
RDX: 00007f60a71de1b8 RSI: 00007f60a71d6b00 RDI: 000055f780595000
RBP: 00007f60a71d6aa0 R08: 0000000000000000 R09: 00007f60a71d6d80
R10: 0000000000000037 R11: 0000000000000206 R12: 000055f780574000
R13: 0000000000000290 R14: 0000000000001000 R15: 0000000000000000
 </TASK>
Modules linked in:
CR2: 0000000000000008
---[ end trace 0000000000000000 ]---
RIP: 0010:qlink_to_cache mm/kasan/quarantine.c:131 [inline]
RIP: 0010:qlist_free_all+0x69/0x140 mm/kasan/quarantine.c:176
Code: e8 06 48 83 e0 c0 49 8b 4c 05 08 f6 c1 01 0f 85 a8 00 00 00 4c 01 e8 66 90 0f b6 48 33 c1 e1 18 81 f9 00 00 00 f5 48 0f 45 c5 <48> 8b 58 08 4d 8b 34 24 48 63 83 c0 00 00 00 49 29 c4 48 89 df 4c
RSP: 0018:ffffc90003027aa0 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000ff000000
RDX: 0000000000000000 RSI: 000000001a68ef80 RDI: 000000001fffffff
RBP: 0000000000000000 R08: ffffffff816eccb5 R09: 1ffffffff28a290e
R10: dffffc0000000000 R11: fffffbfff28a290f R12: ffffffff9a68ef80
R13: ffffea0000000000 R14: ffffffff9a68ef80 R15: 0000000000000000
FS:  00007f60a6fa7380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 000000005cb38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e8 06 48 83 e0       	call   0xe083480b
   5:	c0 49 8b 4c          	rorb   $0x4c,-0x75(%rcx)
   9:	05 08 f6 c1 01       	add    $0x1c1f608,%eax
   e:	0f 85 a8 00 00 00    	jne    0xbc
  14:	4c 01 e8             	add    %r13,%rax
  17:	66 90                	xchg   %ax,%ax
  19:	0f b6 48 33          	movzbl 0x33(%rax),%ecx
  1d:	c1 e1 18             	shl    $0x18,%ecx
  20:	81 f9 00 00 00 f5    	cmp    $0xf5000000,%ecx
  26:	48 0f 45 c5          	cmovne %rbp,%rax
* 2a:	48 8b 58 08          	mov    0x8(%rax),%rbx <-- trapping instruction
  2e:	4d 8b 34 24          	mov    (%r12),%r14
  32:	48 63 83 c0 00 00 00 	movslq 0xc0(%rbx),%rax
  39:	49 29 c4             	sub    %rax,%r12
  3c:	48 89 df             	mov    %rbx,%rdi
  3f:	4c                   	rex.WR