Bug 621983
| Summary: | -zrelro should be the linker default | ||||||
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| Product: | [Fedora] Fedora | Reporter: | Richard Henderson <rth> | ||||
| Component: | binutils | Assignee: | Nick Clifton <nickc> | ||||
| Status: | CLOSED WONTFIX | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | low | ||||||
| Version: | 14 | CC: | dvlasenk, jakub, jstancek, mschmidt, nickc, ricky | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | All | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2012-08-16 22:34:46 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
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Description
Richard Henderson
2010-08-06 17:08:42 UTC
Created attachment 437882 [details]
Make -zrelro the default
This is the patch I wrote for the openSUSE binutils
-z relro has a runtime cost (up to a page per object per process wasted (to align end of PT_GNU_RELRO subsegment on page boundary and that is all writable memory) plus a mprotect syscall per object/process). It has obvious benefits too (security wise), but it isn't for free. (In reply to comment #2) I realize it isn't free, and that's why it should always be disable-able. But, security wise, I'm suggesting that it should be the _default_. (In reply to comment #2) > -z relro has a runtime cost (up to a page per object per process wasted (to > align end of PT_GNU_RELRO subsegment on page boundary and that is all writable > memory) plus a mprotect syscall per object/process). It has obvious benefits > too (security wise), but it isn't for free. Wow, this does not look good. On an average desktop, it would be a few mbytes of wasted memory. For what it's worth, I believe partial relro is already being enabled by default for all packages from F16 onward, so this would only change anything for programs that people compile themselves. Hi Guys, I have decided to go ahead and add this patch to the current rawhide binutils ( binutils-2.22.52.0.1-7.fc18). In the end I think that security wins out over package size, especially given that the old behaviour can be restored via a command line switch. Cheers Nick This message is a notice that Fedora 14 is now at end of life. Fedora has stopped maintaining and issuing updates for Fedora 14. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At this time, all open bugs with a Fedora 'version' of '14' have been closed as WONTFIX. (Please note: Our normal process is to give advanced warning of this occurring, but we forgot to do that. A thousand apologies.) Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, feel free to reopen this bug and simply change the 'version' to a later Fedora version. Bug Reporter: Thank you for reporting this issue and we are sorry that we were unable to fix it before Fedora 14 reached end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged to click on "Clone This Bug" (top right of this page) and open it against that version of Fedora. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping |