Message-ID: <67886d60.050a0220.20d369.0020.GAE@google.com>
Date: Wed, 15 Jan 2025 18:22:24 -0800
From: syzbot <syzbot+3b2a86ce65e01acca028@...kaller.appspotmail.com>
To: kent.overstreet@...ux.dev, linux-bcachefs@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bcachefs?] kernel BUG in __bch2_btree_node_hash_insert (2)

Hello,

syzbot found the following issue on:

HEAD commit:    b62cef9a5c67 Merge tag 'hwmon-for-v6.13-rc7' of git://git...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13c5acb0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=4ef22c4fce5135b4
dashboard link: https://syzkaller.appspot.com/bug?extid=3b2a86ce65e01acca028
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-b62cef9a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b41aebe26f97/vmlinux-b62cef9a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3ffdc0f63e63/bzImage-b62cef9a.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3b2a86ce65e01acca028@...kaller.appspotmail.com

bcachefs (loop0): btree_node_read_work: rewriting btree node at btree=freespace level=0 SPOS_MAX due to error
invalid btree root deleted_inodes, fixing
bcachefs (loop0): flagging btree deleted_inodes lost data
bcachefs (loop0): scan_for_btree_nodes...
bch2_scan_for_btree_nodes: nodes found after overwrites:
  xattrs l=0 seq=1 journal_seq=4 cookie=2285c34bed0abe32 POS_MIN-SPOS_MAX ptr: 0:31:0 gen 0
  lru l=0 seq=1 journal_seq=5 cookie=28f61e078e70b95c POS_MIN-SPOS_MAX ptr: 0:28:0 gen 0
  deleted_inodes l=0 seq=1 journal_seq=0 cookie=1db8f60c84bb244c POS_MIN-SPOS_MAX ptr: 0:42:0 gen 0
 done
bcachefs (loop0): check_topology...
bcachefs (loop0): btree root extents unreadable, must recover from scan
no nodes found for btree extents, continuing
bcachefs (loop0): btree root deleted_inodes unreadable, must recover from scan
bcachefs (loop0): bch2_get_scanned_nodes(): recovering deleted_inodes l=0 POS_MIN - SPOS_MAX
bcachefs (loop0): bch2_get_scanned_nodes(): recovering u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 1db8f60c84bb244c written 8 min_key POS_MIN durability: 1 ptr: 0:42:0 gen 0
 done
bcachefs (loop0): accounting_read... done
bcachefs (loop0): alloc_read... done
bcachefs (loop0): stripes_read... done
bcachefs (loop0): snapshots_read... done
bcachefs (loop0): check_allocations...
bcachefs (loop0): pointer to nonexistent bucket 0:4398046511107
bcachefs (loop0): bch2_gc_mark_key(): error EIO
bcachefs (loop0): bch2_gc_btree(): error EIO
btree node read error for alloc, fixing
btree ptr not marked in member info btree allocated bitmap
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 7589ab5e0c11cc7a written 24 min_key POS_MIN durability: 1 ptr: 0:38:0 gen 0, fixing
bucket 0:38 data type btree ptr gen 0 missing in alloc btree
while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 7589ab5e0c11cc7a written 24 min_key POS_MIN durability: 1 ptr: 0:38:0 gen 0, fixing
btree ptr not marked in member info btree allocated bitmap
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 9aa2895aefce4bdf written 24 min_key POS_MIN durability: 1 ptr: 0:41:0 gen 0, fixing
bucket 0:41 data type btree ptr gen 0 missing in alloc btree
while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 9aa2895aefce4bdf written 24 min_key POS_MIN durability: 1 ptr: 0:41:0 gen 0, fixing
btree ptr not marked in member info btree allocated bitmap
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c0bef60d07ceb940 written 16 min_key POS_MIN durability: 1 ptr: 0:35:0 gen 0, fixing
bucket 0:35 data type btree ptr gen 0 missing in alloc btree
while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c0bef60d07ceb940 written 16 min_key POS_MIN durability: 1 ptr: 0:35:0 gen 0, fixing
btree ptr not marked in member info btree allocated bitmap
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq ebb8d5a9e3463bdb written 16 min_key POS_MIN durability: 1 ptr: 0:32:0 gen 0, fixing
bucket 0:32 data type btree ptr gen 0 missing in alloc btree
while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq ebb8d5a9e3463bdb written 16 min_key POS_MIN durability: 1 ptr: 0:32:0 gen 0, fixing
bucket 0:28 data type btree ptr gen 0 missing in alloc btree
while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 28f61e078e70b95c written 16 min_key POS_MIN durability: 1 ptr: 0:28:0 gen 0, fixing
btree ptr not marked in member info btree allocated bitmap
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq e81e1ed936acf3df written 21 min_key POS_MIN durability: 1 ptr: 0:29:0 gen 0, fixing
bucket 0:29 data type btree ptr gen 0 missing in alloc btree
while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq e81e1ed936acf3df written 21 min_key POS_MIN durability: 1 ptr: 0:29:0 gen 0, fixing
bucket 0:42 data type btree stale dirty ptr: 0 < 7
while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 1db8f60c84bb244c written 8 min_key POS_MIN durability: 1 ptr: 0:42:0 gen 0, fixing
------------[ cut here ]------------
kernel BUG at fs/bcachefs/btree_cache.c:280!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted 6.13.0-rc6-syzkaller-00262-gb62cef9a5c67 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__bch2_btree_node_hash_insert+0x12ed/0x1310 fs/bcachefs/btree_cache.c:280
Code: ed fd e9 9d f5 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c f2 f7 ff ff 48 89 df e8 2e 61 ed fd e9 e5 f7 ff ff e8 a4 fd 86 fd 90 <0f> 0b e8 9c fd 86 fd 90 0f 0b e8 94 fd 86 fd 90 0f 0b e8 3c 65 b0
RSP: 0018:ffffc9000d41dde0 EFLAGS: 00010287
RAX: ffffffff8418848c RBX: ffff888040273228 RCX: 0000000000100000
RDX: ffffc9000e982000 RSI: 000000000008c2b0 RDI: 000000000008c2b1
RBP: ffffc9000d41df10 R08: ffffffff84188d71 R09: 1ffff1100804e616
R10: dffffc0000000000 R11: ffffed100804e617 R12: 1ffff1100804e645
R13: dffffc0000000000 R14: ffff888053081a80 R15: ffff888040273000
FS:  00007f9d548776c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559ae8673088 CR3: 000000003ff32000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_btree_node_update_key_early+0xa8d/0xbd0 fs/bcachefs/btree_cache.c:332
 bch2_check_fix_ptrs+0x5dc7/0x6530 fs/bcachefs/buckets.c:380
 bch2_trigger_extent+0x92c/0xaa0 fs/bcachefs/buckets.c:856
 bch2_key_trigger fs/bcachefs/bkey_methods.h:87 [inline]
 bch2_gc_mark_key+0x6b5/0x10e0 fs/bcachefs/btree_gc.c:634
 bch2_gc_btree fs/bcachefs/btree_gc.c:670 [inline]
 bch2_gc_btrees fs/bcachefs/btree_gc.c:729 [inline]
 bch2_check_allocations+0x1c3e/0x7070 fs/bcachefs/btree_gc.c:1133
 bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:191
 bch2_run_recovery_passes+0x3a7/0x880 fs/bcachefs/recovery_passes.c:244
 bch2_fs_recovery+0x25cc/0x39d0 fs/bcachefs/recovery.c:861
 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1037
 bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2170
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3511
 do_mount fs/namespace.c:3851 [inline]
 __do_sys_mount fs/namespace.c:4061 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4038
 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: 0033:0x7f9d539874ca
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:00007f9d54876e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f9d54876ef0 RCX: 00007f9d539874ca
RDX: 0000000020000000 RSI: 0000000020005900 RDI: 00007f9d54876eb0
RBP: 0000000020000000 R08: 00007f9d54876ef0 R09: 0000000001000044
R10: 0000000001000044 R11: 0000000000000246 R12: 0000000020005900
R13: 00007f9d54876eb0 R14: 00000000000059bc R15: 0000000020000180
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__bch2_btree_node_hash_insert+0x12ed/0x1310 fs/bcachefs/btree_cache.c:280
Code: ed fd e9 9d f5 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c f2 f7 ff ff 48 89 df e8 2e 61 ed fd e9 e5 f7 ff ff e8 a4 fd 86 fd 90 <0f> 0b e8 9c fd 86 fd 90 0f 0b e8 94 fd 86 fd 90 0f 0b e8 3c 65 b0
RSP: 0018:ffffc9000d41dde0 EFLAGS: 00010287
RAX: ffffffff8418848c RBX: ffff888040273228 RCX: 0000000000100000
RDX: ffffc9000e982000 RSI: 000000000008c2b0 RDI: 000000000008c2b1
RBP: ffffc9000d41df10 R08: ffffffff84188d71 R09: 1ffff1100804e616
R10: dffffc0000000000 R11: ffffed100804e617 R12: 1ffff1100804e645
R13: dffffc0000000000 R14: ffff888053081a80 R15: ffff888040273000
FS:  00007f9d548776c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559ae8673088 CR3: 000000003ff32000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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