From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EE9A933688A; Wed, 4 Mar 2026 00:36:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772584564; cv=none; b=cqOeO4FEPlCcnHx04LLCgZTEdYujG6VAWNwRyKo0LQwkrn5Mz6/2BUnwLK5iWgRBfnGSg2xtIPr75fxkw/vOtCYiEXWX/6m4r1LZmvqDjxKckTBOew1GEUT82UQCCdW1iR+k72dXhcMaPMQ8UZmbtpiCpAPqtx7mm9dW082+SNg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772584564; c=relaxed/simple; bh=H1uhE52l0NdlL0DzS2ZP5duN1wYKtufIOeOTS6Cnn3o=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=AJA9q6I6ZtvLpDeIiOb95+hzfQbw5YkdU/wSoAUb5DKJirAcHiULnSHfVV74Q9BR1Ulw+Z1cLGZxVP6k9MkcBaoKBNmaxz6oTcUoLyHq10PKT+4AmW1bXU4IJyOmKIsMAMVy4pEx+DiFBp+YZVM48WCu7WDv2HuIpHxYNhxnfwM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qxATxzS5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="qxATxzS5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2F783C116C6; Wed, 4 Mar 2026 00:35:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772584563; bh=H1uhE52l0NdlL0DzS2ZP5duN1wYKtufIOeOTS6Cnn3o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=qxATxzS5oROKJjTc7CQVBJnZDo2wXAgy1wDXg3dXdyR76rIx/HcT0IWfJcpAmfbgs LTi0B9xKRnaa1GbnuGDSB43jzBDFKqbsR7vn6QkKF7L0Dilpatbb+VOMbsvT85frkx 3g0gvBzgxpRGUyTI+cBMzqsWdnu8HRv4W5mfmtlFvzANfIjluLl12Zqo8lJykBU3xx cLtH4ILUVEeiWDEJMVRGiN6eg7cbtiAWnNzVevXfcRgPVdHDq3Urnad4GmKwU+cQpV HTL7bRZ68C9FYBo47lhp3rj6015TCyxg48HTdUBd+23DAJNJlgiJQYpxW5LvbPYySp /UBFhO58VMmTQ== Date: Tue, 3 Mar 2026 16:35:51 -0800 From: Eric Biggers To: syzbot , chao@kernel.org Cc: 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 Message-ID: <20260304003551.GC57956@quark> References: <69a75fe1.a70a0220.b118c.0014.GAE@google.com> Precedence: bulk X-Mailing-List: linux-fscrypt@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <69a75fe1.a70a0220.b118c.0014.GAE@google.com> 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 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? - Eric