Oops: general protection fault, probably for non-canonical address 0xe003fbfffff80000: 0000 [#1] SMP KASAN PTI
KASAN: maybe wild-memory-access in range [0x001fffffffc00000-0x001fffffffc00007]
CPU: 0 UID: 0 PID: 8209 Comm: syz-executor Not tainted 6.15.0-rc1-syzkaller-00095-g2eb959eeecc6 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:get_work_pool+0xea/0x180 kernel/workqueue.c:887
Code: de e8 7a 7a 38 00 81 fb ff ff ff 7f 75 37 e8 8d 75 38 00 31 c0 eb 25 e8 84 75 38 00 48 81 e3 00 fe ff ff 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 c7 0c a0 00 48 8b 03 5b 41 5e 5d
RSP: 0018:ffffc90003357960 EFLAGS: 00010206
RAX: 0003fffffff80000 RBX: 001fffffffc00000 RCX: ffff888025785a00
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff818adef9 R09: 1ffffd1ffff8fb99
R10: dffffc0000000000 R11: fffff91ffff8fb9a R12: ffffe8ffffc7dce0
R13: 1ffffd1ffff8fb9c R14: dffffc0000000000 R15: ffffffff93657020
FS:  000055557f5f6500(0000) GS:ffff888124fc9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000008000 CR3: 000000001296a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 start_flush_work kernel/workqueue.c:4151 [inline]
 __flush_work+0x19a/0xc60 kernel/workqueue.c:4208
 rcu_pending_exit+0x4c1/0x7b0 fs/bcachefs/rcu_pending.c:621
 bch2_fs_btree_key_cache_exit+0x8d8/0xa00 fs/bcachefs/btree_key_cache.c:783
 __bch2_fs_free fs/bcachefs/super.c:576 [inline]
 bch2_fs_release+0x220/0x7d0 fs/bcachefs/super.c:631
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x22f/0x480 lib/kobject.c:737
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
 task_work_run+0x251/0x310 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f5738e497
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe740f3438 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f6f5740e51c RCX: 00007f6f5738e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe740f34f0
RBP: 00007ffe740f34f0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe740f4580
R13: 00007f6f5740e51c R14: 00000000000425ef R15: 00007ffe740f45c0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:get_work_pool+0xea/0x180 kernel/workqueue.c:887
Code: de e8 7a 7a 38 00 81 fb ff ff ff 7f 75 37 e8 8d 75 38 00 31 c0 eb 25 e8 84 75 38 00 48 81 e3 00 fe ff ff 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 c7 0c a0 00 48 8b 03 5b 41 5e 5d
RSP: 0018:ffffc90003357960 EFLAGS: 00010206
RAX: 0003fffffff80000 RBX: 001fffffffc00000 RCX: ffff888025785a00
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff818adef9 R09: 1ffffd1ffff8fb99
R10: dffffc0000000000 R11: fffff91ffff8fb9a R12: ffffe8ffffc7dce0
R13: 1ffffd1ffff8fb9c R14: dffffc0000000000 R15: ffffffff93657020
FS:  000055557f5f6500(0000) GS:ffff888124fc9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcd8cf0fe8 CR3: 000000001296a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	de e8                	fsubrp %st,%st(0)
   2:	7a 7a                	jp     0x7e
   4:	38 00                	cmp    %al,(%rax)
   6:	81 fb ff ff ff 7f    	cmp    $0x7fffffff,%ebx
   c:	75 37                	jne    0x45
   e:	e8 8d 75 38 00       	call   0x3875a0
  13:	31 c0                	xor    %eax,%eax
  15:	eb 25                	jmp    0x3c
  17:	e8 84 75 38 00       	call   0x3875a0
  1c:	48 81 e3 00 fe ff ff 	and    $0xfffffffffffffe00,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 c7 0c a0 00       	call   0xa00d00
  39:	48 8b 03             	mov    (%rbx),%rax
  3c:	5b                   	pop    %rbx
  3d:	41 5e                	pop    %r14
  3f:	5d                   	pop    %rbp