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 1FD8D1990DD; Thu, 25 Jul 2024 14:53:50 +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=1721919230; cv=none; b=NVXi9GfqvICMNZ22+Yvqi9kmBI1I9RNrIt87dJ6ILQepsFAfM3cRb1Bo9mSZmzSak/dGuCj7+RUAa2POl4v0/m+T8Aziw2aCKExyxv9Z7xLZYh/mi+ETUcPRdlioaJvyW7RuwAQVYvTBbUBTqhBG572rihFrzNfDus/xWjKZmWk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721919230; c=relaxed/simple; bh=UHnYBQE9y8jE1X9cAg6cQbvsDOeFx+bZitpE0Lq9DxE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=okP8rlsalEzQm7AjafRfV+FGsr3sRlnfbBMc7ao7dYK0BmhaptaYKkROlIM7eVXSYqyT0nUMX0vET8G8wDu2CDBGgdQSTFbqok/GMnPOZ9zV3/Qc8e6Gh1aywlzFtH3+vCaFjbrM2cOY4gRudaZdWZoqI3aFreZAoK9EjJYPcXo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=FXInGf8A; 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="FXInGf8A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 97E2FC116B1; Thu, 25 Jul 2024 14:53:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1721919230; bh=UHnYBQE9y8jE1X9cAg6cQbvsDOeFx+bZitpE0Lq9DxE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FXInGf8AC4pDMxnpcPVFpctrnRWN1YmoBGnU/+XYQ6dA71ne557RjLfW/dTHaqpnF ozXXcS2aCUuK4Xr/JY7OOqMQoutFyHGGbJ+/yMxadGsD7XDrP+9qmQ2XJuZBuf3Tke 3Mrnts1wEQIU1HPkKjE2WA+8NecsoNQLbCJGvGo4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Edward Adam Davis , Christian Brauner , Sasha Levin , syzbot+efde959319469ff8d4d7@syzkaller.appspotmail.com, syzbot+01ade747b16e9c8030e0@syzkaller.appspotmail.com Subject: [PATCH 5.15 62/87] hfsplus: fix uninit-value in copy_name Date: Thu, 25 Jul 2024 16:37:35 +0200 Message-ID: <20240725142740.770881863@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240725142738.422724252@linuxfoundation.org> References: <20240725142738.422724252@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Edward Adam Davis [ Upstream commit 0570730c16307a72f8241df12363f76600baf57d ] [syzbot reported] BUG: KMSAN: uninit-value in sized_strscpy+0xc4/0x160 sized_strscpy+0xc4/0x160 copy_name+0x2af/0x320 fs/hfsplus/xattr.c:411 hfsplus_listxattr+0x11e9/0x1a50 fs/hfsplus/xattr.c:750 vfs_listxattr fs/xattr.c:493 [inline] listxattr+0x1f3/0x6b0 fs/xattr.c:840 path_listxattr fs/xattr.c:864 [inline] __do_sys_listxattr fs/xattr.c:876 [inline] __se_sys_listxattr fs/xattr.c:873 [inline] __x64_sys_listxattr+0x16b/0x2f0 fs/xattr.c:873 x64_sys_call+0x2ba0/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:195 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:3877 [inline] slab_alloc_node mm/slub.c:3918 [inline] kmalloc_trace+0x57b/0xbe0 mm/slub.c:4065 kmalloc include/linux/slab.h:628 [inline] hfsplus_listxattr+0x4cc/0x1a50 fs/hfsplus/xattr.c:699 vfs_listxattr fs/xattr.c:493 [inline] listxattr+0x1f3/0x6b0 fs/xattr.c:840 path_listxattr fs/xattr.c:864 [inline] __do_sys_listxattr fs/xattr.c:876 [inline] __se_sys_listxattr fs/xattr.c:873 [inline] __x64_sys_listxattr+0x16b/0x2f0 fs/xattr.c:873 x64_sys_call+0x2ba0/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:195 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f [Fix] When allocating memory to strbuf, initialize memory to 0. Reported-and-tested-by: syzbot+efde959319469ff8d4d7@syzkaller.appspotmail.com Signed-off-by: Edward Adam Davis Link: https://lore.kernel.org/r/tencent_8BBB6433BC9E1C1B7B4BDF1BF52574BA8808@qq.com Reported-and-tested-by: syzbot+01ade747b16e9c8030e0@syzkaller.appspotmail.com Signed-off-by: Christian Brauner Signed-off-by: Sasha Levin --- fs/hfsplus/xattr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/hfsplus/xattr.c b/fs/hfsplus/xattr.c index e2855ceefd394..71fb2f8e91170 100644 --- a/fs/hfsplus/xattr.c +++ b/fs/hfsplus/xattr.c @@ -699,7 +699,7 @@ ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size) return err; } - strbuf = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + + strbuf = kzalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + XATTR_MAC_OSX_PREFIX_LEN + 1, GFP_KERNEL); if (!strbuf) { res = -ENOMEM; -- 2.43.0