Bug 1764241
| Summary: | glibc: libio: Remove codecvt vtable [BZ #24588] | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 8 | Reporter: | Carlos O'Donell <codonell> |
| Component: | glibc | Assignee: | Patsy Griffin <pfrankli> |
| Status: | CLOSED ERRATA | QA Contact: | qe-baseos-tools-bugs |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 8.2 | CC: | ashankar, codonell, dj, fweimer, mnewsome, pfrankli, skolosov |
| Target Milestone: | rc | Keywords: | Patch, Triaged |
| Target Release: | 8.0 | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | glibc-2.28-76.el8 | Doc Type: | No Doc Update |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-04-28 16:50:19 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 1746918 | ||
The removal of the unmangled function pointers is something that users aren't going to notice, but we want to clean this up to stay in sync with this code upstream because we may want other changes in this same code. Therefore we aren't going to document this. Glibc testsuite runs with no regression Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2020:1828 |
commit 09e1b0e3f6facc1af2dbcfef204f0aaa8718772b Author: Florian Weimer <fweimer> Date: Mon May 20 21:54:57 2019 +0200 libio: Remove codecvt vtable [BZ #24588] The codecvt vtable is not a real vtable because it also contains the conversion state data. Furthermore, wide stream support was added to GCC 3.0, after a C++ ABI bump, so there is no compatibility requirement with libstdc++. This change removes several unmangled function pointers which could be used with a corrupted FILE object to redirect execution. (libio vtable verification did not cover the codecvt vtable.) Reviewed-by: Yann Droneaud <ydroneaud> Reviewed-by: Adhemerval Zanella <adhemerval.zanella> Please backport patch to Fedora (if required): Fedora 31 Fedora 30 Fedora 29