From: Chao Yu via Linux-f2fs-devel <linux-f2fs-devel@lists.sourceforge.net>
To: Eric Biggers <ebiggers@kernel.org>,
syzbot <syzbot+cf7946ab25b21abc4b66@syzkaller.appspotmail.com>
Cc: tytso@mit.edu, syzkaller-bugs@googlegroups.com,
linux-kernel@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linux-fscrypt@vger.kernel.org, jaegeuk@kernel.org
Subject: Re: [f2fs-dev] [syzbot] [fscrypt?] [f2fs?] memory leak in fscrypt_setup_filename
Date: Wed, 4 Mar 2026 09:06:59 +0800 [thread overview]
Message-ID: <3f2fa6be-5000-4d36-998e-cfbe500cdb01@kernel.org> (raw)
In-Reply-To: <20260304003551.GC57956@quark>
On 2026/3/4 08:35, Eric Biggers wrote:
> On Tue, Mar 03, 2026 at 02:25:37PM -0800, syzbot wrote:
>> BUG: memory leak
>> unreferenced object 0xffff888127f70830 (size 16):
>> comm "syz.0.23", pid 6144, jiffies 4294943712
>> hex dump (first 16 bytes):
>> 3c af 57 72 5b e6 8f ad 6e 8e fd 33 42 39 03 ff <.Wr[...n..3B9..
>> backtrace (crc 925f8a80):
>> kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
>> slab_post_alloc_hook mm/slub.c:4520 [inline]
>> slab_alloc_node mm/slub.c:4844 [inline]
>> __do_kmalloc_node mm/slub.c:5237 [inline]
>> __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250
>> kmalloc_noprof include/linux/slab.h:954 [inline]
>> fscrypt_setup_filename+0x15e/0x3b0 fs/crypto/fname.c:364
>> f2fs_setup_filename+0x52/0xb0 fs/f2fs/dir.c:143
>> f2fs_rename+0x159/0xca0 fs/f2fs/namei.c:961
>> f2fs_rename2+0xd5/0xf20 fs/f2fs/namei.c:1308
>
> The following commit added a call to f2fs_setup_filename() without a
> matching call to f2fs_free_filename():
>
> commit 40b2d55e045222dd6de2a54a299f682e0f954b03
> Author: Chao Yu <chao@kernel.org>
> Date: Wed Feb 7 15:05:48 2024 +0800
>
> f2fs: fix to create selinux label during whiteout initialization
>
> Chao, do you want to handle fixing this?
Oh, my bad, let me fix this ASAP.
Thanks Eric for the reminder.
Thanks,
>
> - Eric
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WARNING: multiple messages have this Message-ID (diff)
From: Chao Yu <chao@kernel.org>
To: Eric Biggers <ebiggers@kernel.org>,
syzbot <syzbot+cf7946ab25b21abc4b66@syzkaller.appspotmail.com>
Cc: chao@kernel.org, jaegeuk@kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linux-fscrypt@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com, tytso@mit.edu
Subject: Re: [syzbot] [fscrypt?] [f2fs?] memory leak in fscrypt_setup_filename
Date: Wed, 4 Mar 2026 09:06:59 +0800 [thread overview]
Message-ID: <3f2fa6be-5000-4d36-998e-cfbe500cdb01@kernel.org> (raw)
In-Reply-To: <20260304003551.GC57956@quark>
On 2026/3/4 08:35, Eric Biggers wrote:
> On Tue, Mar 03, 2026 at 02:25:37PM -0800, syzbot wrote:
>> BUG: memory leak
>> unreferenced object 0xffff888127f70830 (size 16):
>> comm "syz.0.23", pid 6144, jiffies 4294943712
>> hex dump (first 16 bytes):
>> 3c af 57 72 5b e6 8f ad 6e 8e fd 33 42 39 03 ff <.Wr[...n..3B9..
>> backtrace (crc 925f8a80):
>> kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
>> slab_post_alloc_hook mm/slub.c:4520 [inline]
>> slab_alloc_node mm/slub.c:4844 [inline]
>> __do_kmalloc_node mm/slub.c:5237 [inline]
>> __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250
>> kmalloc_noprof include/linux/slab.h:954 [inline]
>> fscrypt_setup_filename+0x15e/0x3b0 fs/crypto/fname.c:364
>> f2fs_setup_filename+0x52/0xb0 fs/f2fs/dir.c:143
>> f2fs_rename+0x159/0xca0 fs/f2fs/namei.c:961
>> f2fs_rename2+0xd5/0xf20 fs/f2fs/namei.c:1308
>
> The following commit added a call to f2fs_setup_filename() without a
> matching call to f2fs_free_filename():
>
> commit 40b2d55e045222dd6de2a54a299f682e0f954b03
> Author: Chao Yu <chao@kernel.org>
> Date: Wed Feb 7 15:05:48 2024 +0800
>
> f2fs: fix to create selinux label during whiteout initialization
>
> Chao, do you want to handle fixing this?
Oh, my bad, let me fix this ASAP.
Thanks Eric for the reminder.
Thanks,
>
> - Eric
next prev parent reply other threads:[~2026-03-04 1:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-03 22:25 [f2fs-dev] [syzbot] [fscrypt?] [f2fs?] memory leak in fscrypt_setup_filename syzbot
2026-03-03 22:25 ` syzbot
2026-03-04 0:35 ` [f2fs-dev] " Eric Biggers via Linux-f2fs-devel
2026-03-04 0:35 ` Eric Biggers
2026-03-04 1:06 ` Chao Yu via Linux-f2fs-devel [this message]
2026-03-04 1:06 ` Chao Yu
2026-03-04 7:37 ` [f2fs-dev] " Chao Yu via Linux-f2fs-devel
2026-03-04 7:37 ` Chao Yu
2026-03-04 8:17 ` [f2fs-dev] " syzbot
2026-03-04 8:17 ` syzbot
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