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: 9529 Comm: syz.1.255 Not tainted 6.15.0-rc6-syzkaller-g82f2b0b97b36 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:get_work_pool+0xea/0x180 kernel/workqueue.c:887
Code: de e8 7a 35 34 00 81 fb ff ff ff 7f 75 38 e8 8d 30 34 00 31 c0 eb 25 e8 84 30 34 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 77 ff 93 00 48 8b 03 5b 41 5e 5d
RSP: 0018:ffffc90003d7f160 EFLAGS: 00010206
RAX: 0003fffffff80000 RBX: 001fffffffc00000 RCX: ffff88806f82da00
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffe8ffffd3e88f R09: 1ffffd1ffffa7d11
R10: dffffc0000000000 R11: fffff91ffffa7d12 R12: 0000000000000000
R13: ffffe8ffffd3e8a0 R14: dffffc0000000000 R15: ffffe8ffffd3e888
FS:  00007fb69eefc6c0(0000) GS:ffff8881260fb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f71a8dff000 CR3: 000000007cc10000 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+0x191/0xbc0 kernel/workqueue.c:4208
 rcu_pending_exit+0x4c3/0x7b0 fs/bcachefs/rcu_pending.c:621
 bch2_fs_btree_key_cache_exit+0x8f4/0xa30 fs/bcachefs/btree_key_cache.c:783
 __bch2_fs_free fs/bcachefs/super.c:562 [inline]
 bch2_fs_release+0x230/0x7f0 fs/bcachefs/super.c:618
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x228/0x480 lib/kobject.c:737
 bch2_fs_alloc fs/bcachefs/super.c:981 [inline]
 bch2_fs_open+0x1a7e/0x2820 fs/bcachefs/super.c:2210
 bch2_fs_get_tree+0x45d/0x13b0 fs/bcachefs/fs.c:2489
 vfs_get_tree+0x8f/0x2b0 fs/super.c:1759
 do_new_mount+0x24a/0xa40 fs/namespace.c:3881
 do_mount fs/namespace.c:4221 [inline]
 __do_sys_mount fs/namespace.c:4432 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4409
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb69e1874ba
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007fb69eefbe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb69eefbef0 RCX: 00007fb69e1874ba
RDX: 00000000200000c0 RSI: 0000000020000040 RDI: 00007fb69eefbeb0
RBP: 00000000200000c0 R08: 00007fb69eefbef0 R09: 0000000000800000
R10: 0000000000800000 R11: 0000000000000246 R12: 0000000020000040
R13: 00007fb69eefbeb0 R14: 0000000000005903 R15: 0000000020000140
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:get_work_pool+0xea/0x180 kernel/workqueue.c:887
Code: de e8 7a 35 34 00 81 fb ff ff ff 7f 75 38 e8 8d 30 34 00 31 c0 eb 25 e8 84 30 34 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 77 ff 93 00 48 8b 03 5b 41 5e 5d
RSP: 0018:ffffc90003d7f160 EFLAGS: 00010206
RAX: 0003fffffff80000 RBX: 001fffffffc00000 RCX: ffff88806f82da00
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffe8ffffd3e88f R09: 1ffffd1ffffa7d11
R10: dffffc0000000000 R11: fffff91ffffa7d12 R12: 0000000000000000
R13: ffffe8ffffd3e8a0 R14: dffffc0000000000 R15: ffffe8ffffd3e888
FS:  00007fb69eefc6c0(0000) GS:ffff8881260fb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f71b1169160 CR3: 000000007cc10000 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 35                	jp     0x39
   4:	34 00                	xor    $0x0,%al
   6:	81 fb ff ff ff 7f    	cmp    $0x7fffffff,%ebx
   c:	75 38                	jne    0x46
   e:	e8 8d 30 34 00       	call   0x3430a0
  13:	31 c0                	xor    %eax,%eax
  15:	eb 25                	jmp    0x3c
  17:	e8 84 30 34 00       	call   0x3430a0
  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 77 ff 93 00       	call   0x93ffb0
  39:	48 8b 03             	mov    (%rbx),%rax
  3c:	5b                   	pop    %rbx
  3d:	41 5e                	pop    %r14
  3f:	5d                   	pop    %rbp