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Bug
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Resolution: Unresolved
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Normal
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rhel-9.6
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glibc-2.34-174.el9
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No
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Low
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ZStream, Patch
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1
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rhel-pt-c-libs
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ssg_platform_tools
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1
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False
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False
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No
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Red Hat Enterprise Linux
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PT Libraries 2025 S04
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Approved Blocker
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Unspecified Release Note Type - Unknown
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-
All
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None
Upstream fixed an API glitch in __rseq_size with this commit:
commit 2e456ccf0c34a056e3ccafac4a0c7effef14d918
Author: Florian Weimer <fweimer@redhat.com>
Date: Mon Jul 8 21:14:00 2024 +0200
Linux: Make __rseq_size useful for feature detection (bug 31965)
The __rseq_size value is now the active area of struct rseq
(so 20 initially), not the full struct size including padding
at the end (32 initially).
Update misc/tst-rseq to print some additional diagnostics.
Reviewed-by: Michael Jeanson <mjeanson@efficios.com>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
This was deemed a glibc bug fix for an incorrectly implemented interface, so it applies retroactively.
We need to backport this into all RHEL 9 releases with __rseq_size support (so all of them), so that applications can use __rseq_size for feature checks in the expected way.
- links to
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RHBA-2025:146717
glibc bug fix and enhancement update