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 8FABB2F1FFA; Wed, 28 Jan 2026 15:40:40 +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=1769614840; cv=none; b=ZDAV23d3OpIZZ7vNcqLkYNdDkdRv/9bCEbwA6RDQxkCZkjxxMGA2gMRXZZ4Cy+KU9E2vYmamx9KxjjjxC1lg8zMKXpMkm7eul4vnaCfO2aKiXwBOciVr9N71qr43dRf53EYFLUL34Hvh3rymqpa04DW/GEJIUzXoYN/8D5GRC0Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769614840; c=relaxed/simple; bh=Jff65hMtM8Jmm2XCQ6tD/ctPCVwxQ4pBmalDFzfgMsE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=d88WnEgBenZ5X5wHI5mGoN7stVIDhVWiTxjLT0SjWG+QeLltpWNX38tlW7WEaUxNWbuhXE/Jm/+n3WNjMSHUfzbwnDoTYy1qINscqx2jed/Tl0MZfadydkfljVcJmYdi4HZEaSP0fjrriszZ8hB9WHc/JHNvfaFVsJ3qanNSzkw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Clpk/kUy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Clpk/kUy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0C95AC4CEF7; Wed, 28 Jan 2026 15:40:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1769614840; bh=Jff65hMtM8Jmm2XCQ6tD/ctPCVwxQ4pBmalDFzfgMsE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Clpk/kUyh/wGzUv0WEM3uAoc4JC8quejNu2VECW3N0Mbcoh/M70UQmynkDOq39BKQ mNY35/7d2O85HibhJ4V/2zWjHM2vuVx33opMTSNJ9CJ93M41cqIf8gwM8Bos3zTCMj 7fe8vs1j2WibGhlQpWKlka8Ivhomaa2iA0cl4cFg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+332bd4e9d148f11a87dc@syzkaller.appspotmail.com, syzbot+0399100e525dd9696764@syzkaller.appspotmail.com, Khalid Aziz , Bartlomiej Kubik , Konstantin Komarov , Li hongliang <1468888505@139.com> Subject: [PATCH 6.6 248/254] fs/ntfs3: Initialize allocated memory before use Date: Wed, 28 Jan 2026 16:23:44 +0100 Message-ID: <20260128145353.723087716@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260128145344.698118637@linuxfoundation.org> References: <20260128145344.698118637@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Bartlomiej Kubik [ Upstream commit a8a3ca23bbd9d849308a7921a049330dc6c91398 ] KMSAN reports: Multiple uninitialized values detected: - KMSAN: uninit-value in ntfs_read_hdr (3) - KMSAN: uninit-value in bcmp (3) Memory is allocated by __getname(), which is a wrapper for kmem_cache_alloc(). This memory is used before being properly cleared. Change kmem_cache_alloc() to kmem_cache_zalloc() to properly allocate and clear memory before use. Fixes: 82cae269cfa9 ("fs/ntfs3: Add initialization of super block") Fixes: 78ab59fee07f ("fs/ntfs3: Rework file operations") Tested-by: syzbot+332bd4e9d148f11a87dc@syzkaller.appspotmail.com Reported-by: syzbot+332bd4e9d148f11a87dc@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=332bd4e9d148f11a87dc Fixes: 82cae269cfa9 ("fs/ntfs3: Add initialization of super block") Fixes: 78ab59fee07f ("fs/ntfs3: Rework file operations") Tested-by: syzbot+0399100e525dd9696764@syzkaller.appspotmail.com Reported-by: syzbot+0399100e525dd9696764@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=0399100e525dd9696764 Reviewed-by: Khalid Aziz Signed-off-by: Bartlomiej Kubik Signed-off-by: Konstantin Komarov Signed-off-by: Li hongliang <1468888505@139.com> Signed-off-by: Greg Kroah-Hartman --- fs/ntfs3/inode.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) --- a/fs/ntfs3/inode.c +++ b/fs/ntfs3/inode.c @@ -1327,7 +1327,7 @@ struct inode *ntfs_create_inode(struct m fa |= FILE_ATTRIBUTE_READONLY; /* Allocate PATH_MAX bytes. */ - new_de = __getname(); + new_de = kmem_cache_zalloc(names_cachep, GFP_KERNEL); if (!new_de) { err = -ENOMEM; goto out1; @@ -1756,10 +1756,9 @@ int ntfs_link_inode(struct inode *inode, struct NTFS_DE *de; /* Allocate PATH_MAX bytes. */ - de = __getname(); + de = kmem_cache_zalloc(names_cachep, GFP_KERNEL); if (!de) return -ENOMEM; - memset(de, 0, PATH_MAX); /* Mark rw ntfs as dirty. It will be cleared at umount. */ ntfs_set_state(sbi, NTFS_DIRTY_DIRTY); @@ -1795,7 +1794,7 @@ int ntfs_unlink_inode(struct inode *dir, return -EINVAL; /* Allocate PATH_MAX bytes. */ - de = __getname(); + de = kmem_cache_zalloc(names_cachep, GFP_KERNEL); if (!de) return -ENOMEM;