Message-ID: <6766dfca.050a0220.25abdd.0130.GAE@google.com>
Date: Sat, 21 Dec 2024 07:33:30 -0800
From: syzbot <syzbot+5824b2660896028cfe7f@...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_path_level_init (3)

Hello,

syzbot found the following issue on:

HEAD commit:    f44d154d6e3d Merge tag 'soc-fixes-6.13' of git://git.kerne..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14bb8b44580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6a2b862bf4a5409f
dashboard link: https://syzkaller.appspot.com/bug?extid=5824b2660896028cfe7f
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=116182df980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=135974f8580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-f44d154d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5966a923aa91/vmlinux-f44d154d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/41ce22f38e2f/bzImage-f44d154d.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/2668ea83bc50/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5824b2660896028cfe7f@...kaller.appspotmail.com

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
------------[ cut here ]------------
kernel BUG at fs/bcachefs/btree_iter.c:631!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5298 Comm: syz-executor256 Not tainted 6.13.0-rc3-syzkaller-00017-gf44d154d6e3d #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_path_level_init+0x9ca/0x9f0 fs/bcachefs/btree_iter.c:631
Code: f5 fa ff ff e8 37 14 82 fd 90 0f 0b e8 2f 14 82 fd 90 0f 0b e8 27 14 82 fd 90 0f 0b e8 1f 14 82 fd 90 0f 0b e8 17 14 82 fd 90 <0f> 0b e8 0f 14 82 fd 90 0f 0b e8 07 14 82 fd 90 0f 0b e8 ff 13 82
RSP: 0018:ffffc9000d0e61e0 EFLAGS: 00010293
RAX: ffffffff841d5fd9 RBX: 0000000000000000 RCX: ffff88801f920000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff841d582c R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff2032f37 R12: ffff88804336c000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888048d20033
FS:  000055558e2fb380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc7a4e1ee8 CR3: 000000004320a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btree_path_lock_root fs/bcachefs/btree_iter.c:769 [inline]
 bch2_btree_path_traverse_one+0x10de/0x2940 fs/bcachefs/btree_iter.c:1183
 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_gc_btree fs/bcachefs/btree_gc.c:670 [inline]
 bch2_gc_btrees fs/bcachefs/btree_gc.c:729 [inline]
 bch2_check_allocations+0x1abe/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:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
 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: 0033:0x7fd16309bd3a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdcc127838 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffdcc127850 RCX: 00007fd16309bd3a
RDX: 00000000200058c0 RSI: 0000000020005900 RDI: 00007ffdcc127850
RBP: 0000000000000004 R08: 00007ffdcc127890 R09: 002c303030303030
R10: 0000000000800000 R11: 0000000000000282 R12: 0000000000800000
R13: 00007ffdcc127890 R14: 0000000000000003 R15: 0000000001000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bch2_btree_path_level_init+0x9ca/0x9f0 fs/bcachefs/btree_iter.c:631
Code: f5 fa ff ff e8 37 14 82 fd 90 0f 0b e8 2f 14 82 fd 90 0f 0b e8 27 14 82 fd 90 0f 0b e8 1f 14 82 fd 90 0f 0b e8 17 14 82 fd 90 <0f> 0b e8 0f 14 82 fd 90 0f 0b e8 07 14 82 fd 90 0f 0b e8 ff 13 82
RSP: 0018:ffffc9000d0e61e0 EFLAGS: 00010293
RAX: ffffffff841d5fd9 RBX: 0000000000000000 RCX: ffff88801f920000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff841d582c R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff2032f37 R12: ffff88804336c000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888048d20033
FS:  000055558e2fb380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056329804f038 CR3: 000000004320a000 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.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

Powered by blists - more mailing lists