| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 10 Nov 2006 21:31:48 +0100 From: "Thomas B. Rücker" <dm8tbr@...npma.org> To: linux-ext4@...r.kernel.org Subject: hiding an partition and preventing to get automounted Short description of the situation: - embedded linux device running 2.4.19 montavista (Archos PMA430) - redesigning the firmware to as open source as possible - moved system partition from an loop mounted ext3 image on a fat32 partition to a real partition. - device supports usb-mass-storage mode (complete hdd gets handed over to a usb-bridge) Now we're trying to avoid unmounting that ext3 partition because we use it with unionfs to have a writeable root filesystem. The problem is that when the hdd is accessed via usb the operating system of that desktop PC might mount that ext3 partition and change it. What would be a clean way to hide the partition from systems accessing it? What would be a clean way of making it ReadOnly to those systems? We had some ideas like using a different magic for the filesystem or a high and unique revision number we could patch our kernel for, but I'm not sure if there would be bad side effects to that. Marking the partition as e.g. hidden FAT16 (0x16) won't keep a linux system from recognizing and automounting it. Any ideas or pointers? TIA & Cheers Thomas B. Rücker www.openpma.org - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists