linux-kernel - Re: [syzbot] [hfsplus?] WARNING in hfsplus_free

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Message-ID: <00000000000013805905f395f9a9@google.com>
Date:   Tue, 31 Jan 2023 13:25:38 -0800
From:   syzbot <syzbot+8c0bc9f818702ff75b76@...kaller.appspotmail.com>
To:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, willy@...radead.org
Subject: Re: [syzbot] [hfsplus?] WARNING in hfsplus_free_extents

syzbot has found a reproducer for the following issue on:

HEAD commit:    22b8077d0fce Merge tag 'fscache-fixes-20230130' of git://g..
git tree:       upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=11fc1143480000
kernel config:  https://syzkaller.appspot.com/x/.config?x=515c3f0f31692bf1
dashboard link: https://syzkaller.appspot.com/bug?extid=8c0bc9f818702ff75b76
compiler:       Debian clang version 13.0.1-6~deb11u1, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11f700fd480000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15dcfe59480000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e02f2807881e/disk-22b8077d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e28769c4bbea/vmlinux-22b8077d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bd96facd9902/bzImage-22b8077d.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/47d90a9d05ce/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8c0bc9f818702ff75b76@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 5302 at fs/hfsplus/extents.c:346 hfsplus_free_extents+0x700/0xad0
Modules linked in:
CPU: 1 PID: 5302 Comm: syz-executor176 Not tainted 6.2.0-rc6-syzkaller-00003-g22b8077d0fce #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:hfsplus_free_extents+0x700/0xad0 fs/hfsplus/extents.c:346
Code: 0f cb 44 89 ef 89 de e8 6e 5c 2c ff 41 39 dd 75 20 49 83 c7 28 e8 c0 5a 2c ff 41 bc 05 00 00 00 e9 e3 f9 ff ff e8 b0 5a 2c ff <0f> 0b e9 86 f9 ff ff 44 89 ef 89 de e8 3f 5c 2c ff 41 29 dd 73 0a
RSP: 0018:ffffc900041cf890 EFLAGS: 00010293
RAX: ffffffff825e7170 RBX: ffff8880715f7020 RCX: ffff888075660000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88802801c048
RBP: ffff88807a33e000 R08: dffffc0000000000 R09: ffffed100500380a
R10: ffffed100500380a R11: 1ffff11005003809 R12: 0000000000000144
R13: 0000000000000146 R14: 0000000000000146 R15: ffff88802aec2898
FS:  00007f552e806700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020056000 CR3: 0000000022bd1000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_file_truncate+0x827/0xbb0 fs/hfsplus/extents.c:591
 hfsplus_write_begin+0xc2/0xd0 fs/hfsplus/inode.c:56
 generic_perform_write+0x2e4/0x5e0 mm/filemap.c:3772
 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3900
 generic_file_write_iter+0xab/0x310 mm/filemap.c:3932
 call_write_iter include/linux/fs.h:2189 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x7dc/0xc50 fs/read_write.c:584
 ksys_write+0x177/0x2a0 fs/read_write.c:637
 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: 0033:0x7f5536bfb599
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 00 00 90 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:00007f552e8062f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5536c807b8 RCX: 00007f5536bfb599
RDX: 00000000000ffe00 RSI: 0000000020004200 RDI: 0000000000000004
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5536c807b0
R13: 00007f5536c7e140 R14: 00007f5536c4d904 R15: 0031656c69662f2e
 </TASK>