linux-kernel - [syzbot] WARNING in btrfs_replace_file

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Message-ID: <0000000000008bb3b905ecd046a7@google.com>
Date:   Sun, 06 Nov 2022 09:02:44 -0800
From:   syzbot <syzbot+2f950aaffb5b5e29e988@...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] WARNING in btrfs_replace_file_extents

Hello,

syzbot found the following issue on:

HEAD commit:    b208b9fbbcba Merge tag 'arm64-fixes' of git://git.kernel.o..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15089866880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f7e100ed8aaa828e
dashboard link: https://syzkaller.appspot.com/bug?extid=2f950aaffb5b5e29e988
compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=129c6099880000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/92fde6d92d82/disk-b208b9fb.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ae3dbdb3faf8/vmlinux-b208b9fb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bbf4da09683c/bzImage-b208b9fb.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/f92112a8392e/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2f950aaffb5b5e29e988@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 3656 at fs/btrfs/file.c:2872 btrfs_replace_file_extents+0x14ae/0x1a60 fs/btrfs/file.c:2872
Modules linked in:
CPU: 0 PID: 3656 Comm: syz-executor.0 Not tainted 6.1.0-rc3-syzkaller-00288-gb208b9fbbcba #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:btrfs_replace_file_extents+0x14ae/0x1a60 fs/btrfs/file.c:2872
Code: c6 60 37 db 8a 44 89 e2 31 c0 e8 3f 5f a4 06 e9 66 fd ff ff e8 93 14 fa fd 48 c7 c7 60 36 db 8a 44 89 e6 31 c0 e8 a2 b2 c1 fd <0f> 0b 41 b7 01 45 0f b6 c7 48 89 df 48 c7 c6 a0 38 db 8a ba 38 0b
RSP: 0018:ffffc9000410f540 EFLAGS: 00010246
RAX: 1ebea76ba4070c00 RBX: ffff8880727ec0a8 RCX: ffff88807e459d40
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000410f710 R08: ffffffff816b9e3d R09: ffffed1017344f13
R10: ffffed1017344f13 R11: 1ffff11017344f12 R12: 00000000fffffff4
R13: 1ffff1100e4fd81f R14: ffff8880727ec0f8 R15: 0000000000000000
FS:  00007f7bf103c700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7bf103bff8 CR3: 000000001e5de000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 insert_prealloc_file_extent fs/btrfs/inode.c:9852 [inline]
 __btrfs_prealloc_file_range+0x803/0x14d0 fs/btrfs/inode.c:9919
 btrfs_prealloc_file_range+0x3c/0x50 fs/btrfs/inode.c:9998
 btrfs_zero_range+0xd2a/0x12d0 fs/btrfs/file.c:3308
 btrfs_fallocate+0xc54/0x2020 fs/btrfs/file.c:3418
 vfs_fallocate+0x515/0x670 fs/open.c:323
 ksys_fallocate fs/open.c:346 [inline]
 __do_sys_fallocate fs/open.c:354 [inline]
 __se_sys_fallocate fs/open.c:352 [inline]
 __x64_sys_fallocate+0xb9/0x100 fs/open.c:352
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7bf028b5a9
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7bf103c168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f7bf03ac2c0 RCX: 00007f7bf028b5a9
RDX: 0000000000000000 RSI: 0000000100000011 RDI: 0000000000000003
RBP: 00007f7bf103c1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffd887b79bf R14: 00007f7bf103c300 R15: 0000000000022000
 </TASK>


---
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