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 4681228EB for ; Mon, 30 Jan 2023 14:10:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BF2BAC433D2; Mon, 30 Jan 2023 14:10:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1675087821; bh=lgB+h01vLdahb3elCZpTOBlZCqswRJjOwxDEmDPK1i4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uYuXgn/d+MFbyHTlhyDNmL7fQEH004bRM9XsFmQwY5JlI3uvjCFwvHQ6sTDEoQX1r k154yS0bIlcEf/gSI+vOSXOamt5iyw1anHzvb8GUsDvEqcFfnoV1OGHIYTpzgfPGSJ yVvb8vkHcSU+tuP9ZpQru+1N5t7kjKEqGVVg+t58= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dean Luick , Dennis Dalessandro , Leon Romanovsky , Sasha Levin Subject: [PATCH 5.15 021/204] IB/hfi1: Reject a zero-length user expected buffer Date: Mon, 30 Jan 2023 14:49:46 +0100 Message-Id: <20230130134317.219331029@linuxfoundation.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230130134316.327556078@linuxfoundation.org> References: <20230130134316.327556078@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Dean Luick [ Upstream commit 0a0a6e80472c98947d73c3d13bcd7d101895f55d ] A zero length user buffer makes no sense and the code does not handle it correctly. Instead, reject a zero length as invalid. Fixes: 97736f36dbeb ("IB/hfi1: Validate page aligned for a given virtual addres") Signed-off-by: Dean Luick Signed-off-by: Dennis Dalessandro Link: https://lore.kernel.org/r/167328547120.1472310.6362802432127399257.stgit@awfm-02.cornelisnetworks.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/hfi1/user_exp_rcv.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/infiniband/hw/hfi1/user_exp_rcv.c b/drivers/infiniband/hw/hfi1/user_exp_rcv.c index 0c86e9d354f8..212273fcf4dd 100644 --- a/drivers/infiniband/hw/hfi1/user_exp_rcv.c +++ b/drivers/infiniband/hw/hfi1/user_exp_rcv.c @@ -256,6 +256,8 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd, if (!PAGE_ALIGNED(tinfo->vaddr)) return -EINVAL; + if (tinfo->length == 0) + return -EINVAL; tidbuf = kzalloc(sizeof(*tidbuf), GFP_KERNEL); if (!tidbuf) -- 2.39.0