Oops: general protection fault, probably for non-canonical address 0xdffffc0000000013: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000098-0x000000000000009f]
CPU: 1 UID: 0 PID: 10936 Comm: bch-reclaim/loo Not tainted 6.13.0-rc7-syzkaller-00209-g9528d418de4d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:btree_path_lock_root fs/bcachefs/btree_iter.c:732 [inline]
RIP: 0010:bch2_btree_path_traverse_one+0x94a/0x2940 fs/bcachefs/btree_iter.c:1183
Code: 89 44 24 60 42 80 3c 20 00 74 08 4c 89 ef e8 2d 40 e8 fd 49 8b 45 00 48 89 44 24 48 48 8d 90 98 00 00 00 48 89 d0 48 c1 e8 03 <42> 0f b6 04 20 84 c0 48 89 94 24 80 00 00 00 0f 85 ee 10 00 00 4c
RSP: 0018:ffffc90003675220 EFLAGS: 00010202
RAX: 0000000000000013 RBX: 0000000000000000 RCX: ffff8880354eda00
RDX: 0000000000000098 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003675510 R08: ffffffff841b0610 R09: ffffffff841ae689
R10: 0000000000000002 R11: ffff8880354eda00 R12: dffffc0000000000
R13: ffff8880676814d8 R14: ffff8880605dc380 R15: 000000000000110b
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6e1b62f000 CR3: 000000003441a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline]
 __bch2_btree_iter_peek fs/bcachefs/btree_iter.c:2210 [inline]
 bch2_btree_iter_peek_upto+0xb58/0x70e0 fs/bcachefs/btree_iter.c:2310
 bch2_btree_iter_peek_upto_type fs/bcachefs/btree_iter.h:685 [inline]
 bch2_bucket_alloc_freelist fs/bcachefs/alloc_foreground.c:495 [inline]
 bch2_bucket_alloc_trans+0x1122/0x3a50 fs/bcachefs/alloc_foreground.c:648
 bch2_bucket_alloc_set_trans+0x517/0xd30 fs/bcachefs/alloc_foreground.c:808
 __open_bucket_add_buckets+0x13d0/0x1ec0 fs/bcachefs/alloc_foreground.c:1057
 open_bucket_add_buckets+0x33a/0x410 fs/bcachefs/alloc_foreground.c:1101
 bch2_alloc_sectors_start_trans+0xce9/0x2030
 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:339 [inline]
 bch2_btree_reserve_get+0x612/0x1890 fs/bcachefs/btree_update_interior.c:549
 bch2_btree_update_start+0xe56/0x14e0 fs/bcachefs/btree_update_interior.c:1247
 bch2_btree_split_leaf+0x123/0x840 fs/bcachefs/btree_update_interior.c:1856
 bch2_trans_commit_error+0x212/0x1380 fs/bcachefs/btree_trans_commit.c:942
 __bch2_trans_commit+0x7ead/0x93c0 fs/bcachefs/btree_trans_commit.c:1140
 wb_flush_one fs/bcachefs/btree_write_buffer.c:183 [inline]
 bch2_btree_write_buffer_flush_locked+0x2af9/0x5a00 fs/bcachefs/btree_write_buffer.c:379
 btree_write_buffer_flush_seq+0x1b23/0x1cc0 fs/bcachefs/btree_write_buffer.c:517
 bch2_btree_write_buffer_journal_flush+0xc7/0x150 fs/bcachefs/btree_write_buffer.c:533
 journal_flush_pins+0x5f7/0xb20 fs/bcachefs/journal_reclaim.c:565
 __bch2_journal_reclaim+0x789/0xda0 fs/bcachefs/journal_reclaim.c:698
 bch2_journal_reclaim_thread+0x174/0x560 fs/bcachefs/journal_reclaim.c:740
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:btree_path_lock_root fs/bcachefs/btree_iter.c:732 [inline]
RIP: 0010:bch2_btree_path_traverse_one+0x94a/0x2940 fs/bcachefs/btree_iter.c:1183
Code: 89 44 24 60 42 80 3c 20 00 74 08 4c 89 ef e8 2d 40 e8 fd 49 8b 45 00 48 89 44 24 48 48 8d 90 98 00 00 00 48 89 d0 48 c1 e8 03 <42> 0f b6 04 20 84 c0 48 89 94 24 80 00 00 00 0f 85 ee 10 00 00 4c
RSP: 0018:ffffc90003675220 EFLAGS: 00010202
RAX: 0000000000000013 RBX: 0000000000000000 RCX: ffff8880354eda00
RDX: 0000000000000098 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003675510 R08: ffffffff841b0610 R09: ffffffff841ae689
R10: 0000000000000002 R11: ffff8880354eda00 R12: dffffc0000000000
R13: ffff8880676814d8 R14: ffff8880605dc380 R15: 000000000000110b
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055cb2db0e950 CR3: 000000000e736000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	89 44 24 60          	mov    %eax,0x60(%rsp)
   4:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
   9:	74 08                	je     0x13
   b:	4c 89 ef             	mov    %r13,%rdi
   e:	e8 2d 40 e8 fd       	call   0xfde84040
  13:	49 8b 45 00          	mov    0x0(%r13),%rax
  17:	48 89 44 24 48       	mov    %rax,0x48(%rsp)
  1c:	48 8d 90 98 00 00 00 	lea    0x98(%rax),%rdx
  23:	48 89 d0             	mov    %rdx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	48 89 94 24 80 00 00 	mov    %rdx,0x80(%rsp)
  38:	00
  39:	0f 85 ee 10 00 00    	jne    0x112d
  3f:	4c                   	rex.WR