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Bug 2177250

Summary: glibc: ldd vdso64.so cause segfault
Product: Red Hat Enterprise Linux 8 Reporter: Paulo Andrade <pandrade>
Component: glibcAssignee: glibc team <glibc-bugzilla>
Status: CLOSED WONTFIX QA Contact: qe-baseos-tools-bugs
Severity: low Docs Contact:
Priority: unspecified    
Version: 8.7CC: ashankar, codonell, dj, fweimer, pfrankli, sipoyare
Target Milestone: rcKeywords: Patch, Triaged
Target Release: ---Flags: pm-rhel: mirror+
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2023-07-28 13:16:42 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:

Description Paulo Andrade 2023-03-10 15:21:30 UTC
# /lib64/ld-2.28.so --verify /usr/lib/modules/$(uname -r)/vdso/vdso64.so
Segmentation fault (core dumped)

This is basically the same issue as Fedora report at bz#2002756

The problem happens with ReaR, when building the ISO used for recovery,
it verifies that all libraries have their dependencies available.

Comment 1 Florian Weimer 2023-03-10 16:17:51 UTC
Confirmed, the crash appears to be in the same place:

==27== Process terminating with default action of signal 11 (SIGSEGV)
==27==  Bad permissions for mapped region at address 0x4800408
==27==    at 0x11310A: UnknownInlinedFun (get-dynamic-info.h:101)
==27==    by 0x11310A: _dl_map_object_from_fd (dl-load.c:1198)
==27==    by 0x114710: _dl_map_object (dl-load.c:2233)
==27==    by 0x125DB8: map_doit (rtld.c:653)
==27==    by 0x122EDB: _dl_catch_exception (dl-error-skeleton.c:208)
==27==    by 0x122F82: _dl_catch_error (dl-error-skeleton.c:227)
==27==    by 0x12A592: dl_main (rtld.c:1418)
==27==    by 0x1252B2: _dl_sysdep_start (dl-sysdep.c:256)
==27==    by 0x126BAA: _dl_start_final (rtld.c:490)
==27==    by 0x126BAA: _dl_start (rtld.c:583)
==27==    by 0x125C57: ??? (in /usr/lib64/ld-2.28.so)
==27==    by 0x2: ???
==27==    by 0x1FFF00068E: ???
==27==    by 0x1FFF000694: ???

This is probably not going to be easy to backport, though.

Is there a workaround in ReaR? Or is it just about the coredump showing up in the logs?

Comment 9 Florian Weimer 2023-07-28 13:16:42 UTC
The issue is purely cosmetic (ldd on a malformed DSO crashes). We do not plan to address it for Red Hat Enterprise Linux 8.