|Summary:||mount with MS_BIND flag accesses invalid data|
|Product:||[Fedora] Fedora||Reporter:||Ulrich Drepper <drepper>|
|Component:||strace||Assignee:||Roland McGrath <roland>|
|Status:||CLOSED ERRATA||QA Contact:||Brian Brock <bbrock>|
|Fixed In Version:||RHBA-2005-130||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2005-02-02 04:36:37 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description Ulrich Drepper 2004-12-06 08:12:46 UTC
Description of problem: If the MS_BIND or MS_MOVE or MS_REMOUNT flag is used with mount, the filesystem parameter is ignored. The user might pass garbage (or NULL). The printpath call currently used to print the value then fails in umovestr. This should be avoided. Version-Release number of selected component (if applicable): strace-4.5.8-1 How reproducible: always Steps to Reproduce: 1.run code using umount with MS_BIND 2. 3. Actual results: mount("/home/drepper/tmp", "/tmp", umovestr: Input/output error 0, 0x1000, 0) = 0 Expected results: mount("/home/drepper/tmp", "/tmp", 0, MS_BIND, 0) = 0 Additional info: The attached patch should do the trick.
Comment 1 Ulrich Drepper 2004-12-06 08:12:46 UTC
Created attachment 107935 [details] Patch to add some more flags and support for not using printpath
Comment 2 Dmitry V. Levin 2004-12-20 01:47:25 UTC
There are few more MS_* flags in the current kernel which could be added altogether.
Comment 3 Roland McGrath 2005-02-02 04:36:37 UTC
I've put the fixes in, though the patch was not complete as is.
Comment 4 Tim Powers 2005-05-19 21:10:02 UTC
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2005-131.html