From: syzbot <syzbot+55ad87f38795d6787521@syzkaller.appspotmail.com>
To: eadavis@qq.com, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [hfs?] KMSAN: uninit-value in __hfsplus_ext_cache_extent
Date: Thu, 28 Dec 2023 16:08:04 -0800 [thread overview]
Message-ID: <000000000000774a19060d9ad3c8@google.com> (raw)
In-Reply-To: <tencent_A16363296CC3BF645C7762576306DA737405@qq.com>
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KMSAN: uninit-value in __hfsplus_ext_cache_extent
loop0: detected capacity change from 0 to 1024
=====================================================
BUG: KMSAN: uninit-value in __hfsplus_ext_read_extent fs/hfsplus/extents.c:170 [inline]
BUG: KMSAN: uninit-value in __hfsplus_ext_cache_extent+0x851/0x960 fs/hfsplus/extents.c:191
__hfsplus_ext_read_extent fs/hfsplus/extents.c:170 [inline]
__hfsplus_ext_cache_extent+0x851/0x960 fs/hfsplus/extents.c:191
hfsplus_file_truncate+0x730/0xf50 fs/hfsplus/extents.c:598
hfsplus_write_failed+0xab/0x100 fs/hfsplus/inode.c:42
hfsplus_write_begin+0x12e/0x130 fs/hfsplus/inode.c:56
generic_perform_write+0x3f5/0xc40 mm/filemap.c:3918
__generic_file_write_iter+0x20a/0x460 mm/filemap.c:4013
generic_file_write_iter+0x103/0x5b0 mm/filemap.c:4039
call_write_iter include/linux/fs.h:2020 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x8ef/0x1490 fs/read_write.c:584
ksys_write+0x20f/0x4c0 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x93/0xd0 fs/read_write.c:646
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
Local variable fd created at:
hfsplus_file_truncate+0x5d/0xf50 fs/hfsplus/extents.c:547
hfsplus_write_failed+0xab/0x100 fs/hfsplus/inode.c:42
CPU: 1 PID: 5490 Comm: syz-executor.0 Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
=====================================================
Tested on:
commit: fbafc3e6 Merge tag 'for_linus' of git://git.kernel.org..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=14922dcee80000
kernel config: https://syzkaller.appspot.com/x/.config?x=e0c7078a6b901aa3
dashboard link: https://syzkaller.appspot.com/bug?extid=55ad87f38795d6787521
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=12e443d9e80000
prev parent reply other threads:[~2023-12-29 0:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-28 10:23 [syzbot] [hfs?] KMSAN: uninit-value in __hfsplus_ext_cache_extent syzbot
2023-12-28 13:21 ` Edward Adam Davis
2023-12-28 13:40 ` syzbot
2023-12-28 13:59 ` Edward Adam Davis
2023-12-28 14:51 ` syzbot
2023-12-28 22:01 ` Edward Adam Davis
2023-12-29 0:08 ` syzbot [this message]
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