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 61ECF171A0 for ; Mon, 26 Jun 2023 21:51:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 11FB4C433C8; Mon, 26 Jun 2023 21:51:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1687816269; bh=pHx28e+t/THsLVmMcAyCtSXYbf++yJVnrB+rJRRiExk=; h=From:To:Cc:Subject:Date:From; b=p7nXdoL9YPle0EihfnFaIgVK5IMdrlP88DBz0ACj9UvrQQJxwVrNx88i1CmTdQC/A gwEICeYIeSE7RIi5zl+KDttr3Tq2UL83L+3FZpbt2AzB0aff6cBeSDROMtmkFstfsP U0uZtBN8f5l/cqN7aApdS4e0keKL8CM1Rt1KGmmkhTPB/8jgc3/MHf/obRe+GyfNqJ gLJEZzPkwcktl/uCrIxnodQRmzHafzCmxIcvxIZCI3EbpZxVsv7uzgDn7B1QeiFrrN VD5KRmYjQ6v6/ik991BG9RJqj+dSpKIo7WNGdt96MqSiw++R0+iz5OKNkR/A5CajUL NE0V6GKRWVv1A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Mastykin , Paul Moore , "David S . Miller" , Sasha Levin , edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH AUTOSEL 5.10 1/7] netlabel: fix shift wrapping bug in netlbl_catmap_setlong() Date: Mon, 26 Jun 2023 17:51:01 -0400 Message-Id: <20230626215108.179483-1-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.10.185 Content-Transfer-Encoding: 8bit From: Dmitry Mastykin [ Upstream commit b403643d154d15176b060b82f7fc605210033edd ] There is a shift wrapping bug in this code on 32-bit architectures. NETLBL_CATMAP_MAPTYPE is u64, bitmap is unsigned long. Every second 32-bit word of catmap becomes corrupted. Signed-off-by: Dmitry Mastykin Acked-by: Paul Moore Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/netlabel/netlabel_kapi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c index 91b35b7c80d82..96059c99b915e 100644 --- a/net/netlabel/netlabel_kapi.c +++ b/net/netlabel/netlabel_kapi.c @@ -857,7 +857,8 @@ int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap, offset -= iter->startbit; idx = offset / NETLBL_CATMAP_MAPSIZE; - iter->bitmap[idx] |= bitmap << (offset % NETLBL_CATMAP_MAPSIZE); + iter->bitmap[idx] |= (NETLBL_CATMAP_MAPTYPE)bitmap + << (offset % NETLBL_CATMAP_MAPSIZE); return 0; } -- 2.39.2