From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-3.3 required=5.0 tests=MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 700 invoked from network); 24 Jan 2021 18:10:53 -0000 Received: from mother.openwall.net (195.42.179.200) by inbox.vuxu.org with ESMTPUTF8; 24 Jan 2021 18:10:53 -0000 Received: (qmail 7600 invoked by uid 550); 24 Jan 2021 18:10:49 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Reply-To: musl@lists.openwall.com Received: (qmail 7582 invoked from network); 24 Jan 2021 18:10:48 -0000 Date: Sun, 24 Jan 2021 13:10:36 -0500 From: Rich Felker To: Alexander Monakov Cc: musl@lists.openwall.com, Andrew Rogers Message-ID: <20210124181036.GS23432@brightrain.aerifal.cx> References: <20210124154026.GR23432@brightrain.aerifal.cx> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Subject: Re: [musl] Potential DL_NOMMU_SUPPORT bug. On Sun, Jan 24, 2021 at 06:58:10PM +0300, Alexander Monakov wrote: > On Sun, 24 Jan 2021, Rich Felker wrote: > > > Could you clarify what you're trying to do? Android devices are not > > nommu and loading the binary from SD card vs elsewhere should not be > > relevant to mmap failure here. > > sdcard [pseudo-]partition is usually mounted noexec, so mmap with PROT_EXEC > should fail. Uhg, that makes no sense. Does it enforce that even for MAP_PRIVATE, which should semantically be equivalent to just making anon memory with the requested permissions and copying the file contents into it?? Rich