Message-ID: <6716521c.050a0220.1e4b4d.005a.GAE@google.com>
Date: Mon, 21 Oct 2024 06:07:40 -0700
From: syzbot <syzbot+e8eff054face85d7ea41@...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_dev_btree_bitmap_mark

Hello,

syzbot found the following issue on:

HEAD commit:    6efbea77b390 Merge tag 'arm64-fixes' of git://git.kernel.o..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11c38240580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=cfbd94c114a3d407
dashboard link: https://syzkaller.appspot.com/bug?extid=e8eff054face85d7ea41
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=14b10487980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15f8af27980000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-6efbea77.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/aa4b0fb0c7f0/vmlinux-6efbea77.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7128c5b0c0b5/bzImage-6efbea77.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/459a008a6b91/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e8eff054face85d7ea41@...kaller.appspotmail.com

bcachefs (loop0): alloc_read... done
bcachefs (loop0): stripes_read... done
bcachefs (loop0): snapshots_read... done
bcachefs (loop0): check_allocations...
------------[ cut here ]------------
kernel BUG at fs/bcachefs/sb-members.c:453!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5100 Comm: syz-executor307 Not tainted 6.12.0-rc3-syzkaller-00183-g6efbea77b390 #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_dev_btree_bitmap_mark fs/bcachefs/sb-members.c:453 [inline]
RIP: 0010:bch2_dev_btree_bitmap_mark+0xfd2/0xff0 fs/bcachefs/sb-members.c:473
Code: b3 f1 ff ff e8 af 9f 4c fd 90 0f 0b e8 a7 9f 4c fd 90 0f 0b e8 9f 9f 4c fd 90 0f 0b e8 97 9f 4c fd 90 0f 0b e8 8f 9f 4c fd 90 <0f> 0b e8 87 9f 4c fd 90 0f 0b e8 7f 0d 7e 07 66 2e 0f 1f 84 00 00
RSP: 0018:ffffc90002dfe5a0 EFLAGS: 00010293
RAX: ffffffff84484871 RBX: 00000000ffffffc8 RCX: ffff88801e284880
RDX: 0000000000000000 RSI: 000000000000003f RDI: 0000000000000039
RBP: ffffc90002dfe7b0 R08: ffffffff844844f1 R09: 0000000000000000
R10: 0000042098000000 R11: 0000000000000000 R12: 000000000000003f
R13: 0000042098000000 R14: ffff88803f7839d0 R15: 000000000000003f
FS:  0000555592498380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561dbfb3d000 CR3: 00000000400e8000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_gc_mark_key+0xc9b/0x10e0 fs/bcachefs/btree_gc.c:622
 bch2_gc_btree fs/bcachefs/btree_gc.c:698 [inline]
 bch2_gc_btrees fs/bcachefs/btree_gc.c:729 [inline]
 bch2_check_allocations+0x22e8/0x6e80 fs/bcachefs/btree_gc.c:1123
 bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:185
 bch2_run_recovery_passes+0x387/0x870 fs/bcachefs/recovery_passes.c:232
 bch2_fs_recovery+0x25cc/0x39c0 fs/bcachefs/recovery.c:862
 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1036
 bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2174
 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: 0033:0x7fa72a53cf2a
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:00007ffd5b715e88 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd5b715ea0 RCX: 00007fa72a53cf2a
RDX: 00000000200000c0 RSI: 0000000020000000 RDI: 00007ffd5b715ea0
RBP: 0000000000000004 R08: 00007ffd5b715ee0 R09: 0000000000005901
R10: 0000000000808016 R11: 0000000000000282 R12: 0000000000808016
R13: 00007ffd5b715ee0 R14: 0000000000000003 R15: 0000000001000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__bch2_dev_btree_bitmap_mark fs/bcachefs/sb-members.c:453 [inline]
RIP: 0010:bch2_dev_btree_bitmap_mark+0xfd2/0xff0 fs/bcachefs/sb-members.c:473
Code: b3 f1 ff ff e8 af 9f 4c fd 90 0f 0b e8 a7 9f 4c fd 90 0f 0b e8 9f 9f 4c fd 90 0f 0b e8 97 9f 4c fd 90 0f 0b e8 8f 9f 4c fd 90 <0f> 0b e8 87 9f 4c fd 90 0f 0b e8 7f 0d 7e 07 66 2e 0f 1f 84 00 00
RSP: 0018:ffffc90002dfe5a0 EFLAGS: 00010293
RAX: ffffffff84484871 RBX: 00000000ffffffc8 RCX: ffff88801e284880
RDX: 0000000000000000 RSI: 000000000000003f RDI: 0000000000000039
RBP: ffffc90002dfe7b0 R08: ffffffff844844f1 R09: 0000000000000000
R10: 0000042098000000 R11: 0000000000000000 R12: 000000000000003f
R13: 0000042098000000 R14: ffff88803f7839d0 R15: 000000000000003f
FS:  0000555592498380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561dbfb3d000 CR3: 00000000400e8000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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