linux-kernel - [syzbot] [bcachefs?] kernel BUG in bch2_inode_update_after

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Message-ID: <674b18d7.050a0220.253251.00dc.GAE@google.com>
Date: Sat, 30 Nov 2024 05:53:27 -0800
From: syzbot <syzbot+1142db83534a06f10d5b@...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_inode_update_after_write

Hello,

syzbot found the following issue on:

HEAD commit:    65ae975e97d5 Merge tag 'net-6.13-rc1' of git://git.kernel...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14512f78580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3891b550f14aea0f
dashboard link: https://syzkaller.appspot.com/bug?extid=1142db83534a06f10d5b
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-65ae975e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/53fd215a7a86/vmlinux-65ae975e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/589c729ff0b2/bzImage-65ae975e.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1142db83534a06f10d5b@...kaller.appspotmail.com

  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  
  node offset 8/16: btree node data missing: expected 16 sectors, found 8, fixing
bcachefs (loop0): btree_node_read_work: rewriting btree node at btree=snapshots level=0 SPOS_MAX due to error
bcachefs (loop0): scan_for_btree_nodes...
bch2_scan_for_btree_nodes: nodes found after overwrites:
  extents l=0 seq=1 journal_seq=5 cookie=c6c25c03258c59c5 POS_MIN-SPOS_MAX ptr: 0:27:0 gen 0
  inodes l=0 seq=1 journal_seq=5 cookie=7589ab5e0c11cc7a POS_MIN-18446462598732840960:14872293344460931071:U32_MAX ptr: 0:38:0 gen 0
  dirents l=0 seq=1 journal_seq=3458764513820540929 cookie=9aa2895aefce4bdf POS_MIN-SPOS_MAX ptr: 0:41:0 gen 0
  xattrs l=0 seq=1 journal_seq=4 cookie=2285c34bed0abe32 POS_MIN-SPOS_MAX ptr: 0:31:0 gen 0
  subvolumes l=0 seq=1 journal_seq=1 cookie=c0bef60d07ceb940 POS_MIN-SPOS_MAX ptr: 0:35:0 gen 0
  snapshots l=0 seq=1 journal_seq=0 cookie=ebb8d5a9e3463bdb POS_MIN-SPOS_MAX ptr: 0:32:0 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 inodes unreadable, must recover from scan
bcachefs (loop0): bch2_get_scanned_nodes(): recovering inodes l=0 POS_MIN - SPOS_MAX
bcachefs (loop0): bch2_get_scanned_nodes(): recovering u64s 11 type btree_ptr_v2 18446462598732840960:14872293344460931071:U32_MAX len 0 ver 0: seq 7589ab5e0c11cc7a written 24 min_key POS_MIN durability: 1 ptr: 0:38:0 gen 0
btree node with incorrect max_keyat btree inodes level 1:
  parent: u64s 5 type btree_ptr SPOS_MAX len 0 ver 0
  child: u64s 11 type btree_ptr_v2 18446462598732840960:14872293344460931071:U32_MAX len 0 ver 0: seq 7589ab5e0c11cc7a written 24 min_key POS_MIN durability: 1 ptr: 0:38:0 gen 0, fixing
bcachefs (loop0): bch2_get_scanned_nodes(): recovering inodes l=0 18446462598732840960:14872293344460931072:0 - SPOS_MAX
btree node with incorrect max_keyat btree inodes level 1:
  parent: u64s 5 type btree_ptr SPOS_MAX len 0 ver 0
  child: u64s 11 type btree_ptr_v2 18446462598732840960:14872293344460931071:U32_MAX len 0 ver 0: seq 7589ab5e0c11cc7a written 24 min_key POS_MIN durability: 1 ptr: 0:38:0 gen 0, fixing
bcachefs (loop0): set_node_max(): u64s 11 type btree_ptr_v2 18446462598732840960:14872293344460931071:U32_MAX len 0 ver 0: seq 7589ab5e0c11cc7a written 24 min_key POS_MIN durability: 1 ptr: 0:38:0 gen 0 -> SPOS_MAX
 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... done
bcachefs (loop0): going read-write
bcachefs (loop0): done starting filesystem
bcachefs (loop0): dirent to missing inode:
  u64s 7 type dirent 4096:189491840996961599:U32_MAX len 0 ver 0: file0 -> 4098 type dir
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
netlink: 157436 bytes leftover after parsing attributes in process `syz.0.0'.
netlink: zone id is out of range
netlink: zone id is out of range
netlink: zone id is out of range
netlink: zone id is out of range
netlink: zone id is out of range
netlink: zone id is out of range
netlink: zone id is out of range
netlink: zone id is out of range
netlink: zone id is out of range
netlink: zone id is out of range
------------[ cut here ]------------
kernel BUG at fs/bcachefs/fs.c:59!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5336 Comm: syz.0.0 Not tainted 6.12.0-syzkaller-10681-g65ae975e97d5 #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_inode_update_after_write+0xbd6/0xbe0 fs/bcachefs/fs.c:59
Code: e1 07 80 c1 03 38 c1 0f 8c ea fb ff ff 48 89 f7 48 89 74 24 10 e8 4a a8 cd fd 48 8b 74 24 10 e9 d3 fb ff ff e8 5b c1 62 fd 90 <0f> 0b e8 33 f9 9f 07 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000d38f8c0 EFLAGS: 00010287
RAX: ffffffff84332325 RBX: 0000000000001003 RCX: 0000000000100000
RDX: ffffc9000e472000 RSI: 0000000000007a41 RDI: 0000000000007a42
RBP: ffffc9000d38fa10 R08: ffffffff8433186e R09: 0000000000001000
R10: 0000000000000d0c R11: 00000000ffffffff R12: ffff888051b2c000
R13: ffff888044b1c000 R14: ffff888044b1de00 R15: 0000000000001002
FS:  00007f10501736c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020034000 CR3: 0000000043e86000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __bch2_unlink+0x469/0x530 fs/bcachefs/fs.c:763
 bch2_unlink+0xac/0xf0 fs/bcachefs/fs.c:786
 vfs_unlink+0x365/0x650 fs/namei.c:4523
 do_unlinkat+0x4ae/0x830 fs/namei.c:4587
 __do_sys_unlink fs/namei.c:4635 [inline]
 __se_sys_unlink fs/namei.c:4633 [inline]
 __x64_sys_unlink+0x47/0x50 fs/namei.c:4633
 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: 0033:0x7f104f380809
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f1050173058 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f104f545fa0 RCX: 00007f104f380809
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007f104f3f393e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f104f545fa0 R15: 00007ffe1724f5b8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bch2_inode_update_after_write+0xbd6/0xbe0 fs/bcachefs/fs.c:59
Code: e1 07 80 c1 03 38 c1 0f 8c ea fb ff ff 48 89 f7 48 89 74 24 10 e8 4a a8 cd fd 48 8b 74 24 10 e9 d3 fb ff ff e8 5b c1 62 fd 90 <0f> 0b e8 33 f9 9f 07 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000d38f8c0 EFLAGS: 00010287
RAX: ffffffff84332325 RBX: 0000000000001003 RCX: 0000000000100000
RDX: ffffc9000e472000 RSI: 0000000000007a41 RDI: 0000000000007a42
RBP: ffffc9000d38fa10 R08: ffffffff8433186e R09: 0000000000001000
R10: 0000000000000d0c R11: 00000000ffffffff R12: ffff888051b2c000
R13: ffff888044b1c000 R14: ffff888044b1de00 R15: 0000000000001002
FS:  00007f10501736c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020034000 CR3: 0000000043e86000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
This report is generated by a bot. It may contain errors.
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