[syzbot] [bcachefs?] kernel BUG in __bch2_btree_node_write

From: syzbot
Date: Thu Oct 03 2024 - 04:10:37 EST

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Hello,

syzbot found the following issue on:

HEAD commit: 3efc57369a0c Merge tag 'for-linus' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=142bf6a9980000
kernel config: https://syzkaller.appspot.com/x/.config?x=a4fcb065287cdb84
dashboard link: https://syzkaller.appspot.com/bug?extid=dedbd67513939979f84f
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-3efc5736.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d0988c372a39/vmlinux-3efc5736.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8547f30d7e9d/bzImage-3efc5736.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+dedbd67513939979f84f@xxxxxxxxxxxxxxxxxxxxxxxxx

bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=errors=continue,compression=lz4,nojournal_transaction_names
bcachefs (loop0): recovering from clean shutdown, journal seq 7
bcachefs (loop0): Doing compatible version upgrade from 1.7: mi_btree_bitmap to 1.12: rebalance_work_acct_fix
running recovery passes: check_allocations
invalid bkey u64s 11 type alloc_v4 0:14:0 len 0 ver 0:
gen 0 oldest_gen 0 data_type journal
journal_seq 1
need_discard 1
need_inc_gen 1
dirty_sectors 256
stripe_sectors 0
cached_sectors 0
stripe 67108864
stripe_redundancy 0
io_time[READ] 1
io_time[WRITE] 1
fragmentation 0
bp_start 8
invalid data type (got 2 should be 7): delete?, fixing
bcachefs (loop0): accounting_read... done
bcachefs (loop0): alloc_read... done
bcachefs (loop0): stripes_read... done
bcachefs (loop0): snapshots_read... done
bcachefs (loop0): check_allocations...
btree ptr not marked in member info btree allocated bitmap
u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 75277f57b0c8c24 written 32 min_key POS_MIN durability: 1 ptr: 0:26:0 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 19bc58a6c09b6540 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 c18f4a4face03c6 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 7675f41d391e5d36 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 bcb9905dfb2993d5 written 16 min_key POS_MIN durability: 1 ptr: 0:32:0 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 9a831b4a3f983356 written 32 min_key POS_MIN durability: 1 ptr: 0:29:0 gen 0, fixing
bucket 0:1 gen 0 has wrong data_type: got free, should be sb, fixing
bucket 0:1 gen 0 data type sb has wrong dirty_sectors: got 0, should be 256, fixing
bucket 0:14 gen 0 has wrong data_type: got free, should be journal, fixing
bucket 0:14 gen 0 data type journal has wrong dirty_sectors: got 0, should be 256, fixing
done
bcachefs (loop0): going read-write
bcachefs (loop0): journal_replay... done
bcachefs (loop0): resume_logged_ops... done
bcachefs (loop0): delete_dead_inodes... done
bcachefs (loop0): Fixed errors, running fsck a second time to verify fs is clean
bcachefs (loop0): resume_logged_ops... done
bcachefs (loop0): delete_dead_inodes... done
bcachefs (loop0): scanning for old btree nodes: min_version 0.9: (unknown version)
------------[ cut here ]------------
kernel BUG at fs/bcachefs/btree_io.c:2099!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5116 Comm: syz.0.0 Not tainted 6.11.0-syzkaller-11993-g3efc57369a0c #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_write+0x43d8/0x4400 fs/bcachefs/btree_io.c:2099
Code: fd 90 0f 0b e8 e9 a7 7d fd 90 0f 0b e8 e1 a7 7d fd 90 0f 0b e8 d9 a7 7d fd 90 0f 0b e8 d1 a7 7d fd 90 0f 0b e8 c9 a7 7d fd 90 <0f> 0b e8 c1 a7 7d fd 90 0f 0b e8 b9 a7 7d fd 90 0f 0b e8 b1 a7 7d
RSP: 0018:ffffc9000b346ac0 EFLAGS: 00010246
RAX: ffffffff84173e57 RBX: 00000000000001e2 RCX: 0000000000040000
RDX: ffffc9000b379000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000b346da0 R08: ffffffff84171d58 R09: 0000000000000000
R10: ffffc9000b346860 R11: fffff52001668d0e R12: dffffc0000000000
R13: ffff88804eb2809e R14: 00000000000001eb R15: 00000000000001e2
FS: 00007f445f9486c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005607e3ef4011 CR3: 000000001eaf8000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
bch2_btree_node_write+0x63/0x1f0 fs/bcachefs/btree_io.c:2283
bch2_btree_node_rewrite+0xcac/0x1280 fs/bcachefs/btree_update_interior.c:2173
bch2_move_btree+0x7af/0xde0 fs/bcachefs/move.c:865
bch2_scan_old_btree_nodes+0x14b/0x3c0 fs/bcachefs/move.c:995
bch2_fs_recovery+0x33da/0x38b0 fs/bcachefs/recovery.c:962
bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1037
bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2071
vfs_get_tree+0x90/0x2b0 fs/super.c:1800
do_new_mount+0x2be/0xb40 fs/namespace.c:3507
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4055 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032
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: 0033:0x7f445eb7f79a
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:00007f445f947e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f445f947ef0 RCX: 00007f445eb7f79a
RDX: 0000000020005d80 RSI: 0000000020005dc0 RDI: 00007f445f947eb0
RBP: 0000000020005d80 R08: 00007f445f947ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020005dc0
R13: 00007f445f947eb0 R14: 0000000000005d7d R15: 0000000020000280
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__bch2_btree_node_write+0x43d8/0x4400 fs/bcachefs/btree_io.c:2099
Code: fd 90 0f 0b e8 e9 a7 7d fd 90 0f 0b e8 e1 a7 7d fd 90 0f 0b e8 d9 a7 7d fd 90 0f 0b e8 d1 a7 7d fd 90 0f 0b e8 c9 a7 7d fd 90 <0f> 0b e8 c1 a7 7d fd 90 0f 0b e8 b9 a7 7d fd 90 0f 0b e8 b1 a7 7d
RSP: 0018:ffffc9000b346ac0 EFLAGS: 00010246
RAX: ffffffff84173e57 RBX: 00000000000001e2 RCX: 0000000000040000
RDX: ffffc9000b379000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000b346da0 R08: ffffffff84171d58 R09: 0000000000000000
R10: ffffc9000b346860 R11: fffff52001668d0e R12: dffffc0000000000
R13: ffff88804eb2809e R14: 00000000000001eb R15: 00000000000001e2
FS: 00007f445f9486c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f445f9279a0 CR3: 000000001eaf8000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

---
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Next message: Petr Mladek: "Re: [PATCH v2] printf: Remove unused 'bprintf'"
Previous message: Alexandre Belloni: "Re: [PATCH 1/2] rtc: m48t59: Accommodate chips that lack a century bit"
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