linux-kernel - [syzbot] kernel BUG in btrfs_global_root

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Date:   Sun, 27 Nov 2022 00:50:38 -0800
From:   syzbot <syzbot+c53508efe63e66c13e68@...kaller.appspotmail.com>
To:     clm@...com, dsterba@...e.com, josef@...icpanda.com,
        linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: [syzbot] kernel BUG in btrfs_global_root_delete

Hello,

syzbot found the following issue on:

HEAD commit:    6d464646530f Merge branch 'for-next/core' into for-kernelci
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=133c91bb880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=23eec5c79c22aaf8
dashboard link: https://syzkaller.appspot.com/bug?extid=c53508efe63e66c13e68
compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1534adbb880000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11820973880000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f22d29413625/disk-6d464646.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/389f0a5f1a4a/vmlinux-6d464646.xz
kernel image: https://storage.googleapis.com/syzbot-assets/48ddb02d82da/Image-6d464646.gz.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/57b749caa804/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c53508efe63e66c13e68@...kaller.appspotmail.com

BTRFS error (device loop0): parent transid verify failed on logical 5255168 mirror 1 wanted 5 found 7
BTRFS warning (device loop0): couldn't read tree root
assertion failed: !tmp, in fs/btrfs/disk-io.c:1098
------------[ cut here ]------------
kernel BUG at fs/btrfs/ctree.h:3713!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 3072 Comm: syz-executor365 Not tainted 6.1.0-rc6-syzkaller-32662-g6d464646530f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : assertfail+0x28/0x2c fs/btrfs/ctree.h:3712
lr : assertfail+0x28/0x2c fs/btrfs/ctree.h:3712
sp : ffff800012df3800
x29: ffff800012df3800 x28: 0000000000000000 x27: 000000000000000b
x26: 0000000000000000 x25: ffff0000c734e000 x24: ffff0000c734e000
x23: 0000000000000000 x22: ffff0000c99141f7 x21: ffff0000c9b9c0a0
x20: ffff0000c9914000 x19: ffff0000c9b9c060 x18: 0000000000000201
x17: 000000000000b67e x16: ffff80000dbe6158 x15: ffff0000c6904ec0
x14: 0000000000000000 x13: 00000000ffffffff x12: ffff0000c6904ec0
x11: ff808000081c4d40 x10: 0000000000000000 x9 : 3743abf7676a7c00
x8 : 3743abf7676a7c00 x7 : ffff80000c08e4f4 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000100000000 x0 : 0000000000000032
Call trace:
 assertfail+0x28/0x2c fs/btrfs/ctree.h:3712
 btrfs_global_root_delete+0x0/0x54 fs/btrfs/disk-io.c:1098
 load_global_roots_objectid+0x20c/0x460 fs/btrfs/disk-io.c:2460
 load_global_roots fs/btrfs/disk-io.c:2494 [inline]
 btrfs_read_roots+0x60/0x530 fs/btrfs/disk-io.c:2521
 init_tree_roots+0x288/0x3d0 fs/btrfs/disk-io.c:2940
 open_ctree+0x688/0xdc8 fs/btrfs/disk-io.c:3634
 btrfs_fill_super+0xc0/0x174 fs/btrfs/super.c:1461
 btrfs_mount_root+0x4a4/0x558 fs/btrfs/super.c:1829
 legacy_get_tree+0x30/0x74 fs/fs_context.c:610
 vfs_get_tree+0x40/0x140 fs/super.c:1531
 fc_mount fs/namespace.c:1043 [inline]
 vfs_kern_mount+0xe0/0x140 fs/namespace.c:1073
 btrfs_mount+0x20c/0x5e8 fs/btrfs/super.c:1889
 legacy_get_tree+0x30/0x74 fs/fs_context.c:610
 vfs_get_tree+0x40/0x140 fs/super.c:1531
 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040
 path_mount+0x358/0x890 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3568
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584
Code: d00060a2 910f0c00 91096c42 97fffbda (d4210000) 
---[ end trace 0000000000000000 ]---


---
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