Bug 52478

Summary:	gcc miscompiling sha1 digest in rpmio/digest.c
Product:	[Retired] Red Hat Linux	Reporter:	Jeff Johnson <jbj>
Component:	gcc	Assignee:	Jakub Jelinek <jakub>
Status:	CLOSED WONTFIX	QA Contact:	David Lawrence <dkl>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.1
Target Milestone:	---
Target Release:	---
Hardware:	alpha
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2004-10-04 20:56:04 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:

Description Jeff Johnson 2001-08-24 03:52:52 UTC

Description of Problem:
gcc-2.96-93 in 7.1 (and gcc-2.96-97 in 7.2) is miscompiling
rpmio/digest.c sha1 digest. Compiling with -O0 works, as
does adding debugging messages.

Version-Release number of selected component (if applicable):

How Reproducible:


Steps to Reproduce:
1.  rpm --rebuild rpm-4.0.3-0.95.src.rpm
2. cd rpmio
3. make tdigest && ../tdigest --fipsa

Actual Results:
2c80fcd2cf957725c03d03c123e666be6b97d925     abc
a9993e364706816aba3e25717850c26c9cd0d89d     FIPS PUB 180-1 Appendix A

Expected Results:
a9993e364706816aba3e25717850c26c9cd0d89d     abc
a9993e364706816aba3e25717850c26c9cd0d89d     FIPS PUB 180-1 Appendix A


Additional Information:
	
There's debugging code in rpmio/digest.c to reproduce the intermediate
FIPS results if necessary (but defining SHA_DEBUG causes problem
to disappear).

Comment 1 Jeff Johnson 2001-08-24 03:55:18 UTC

Note that rpmio/digest.o is being compiled with -O0 in
the rpm-4.0.3-0.95 package.

Comment 2 Vladimir Makarov 2004-10-04 20:56:04 UTC

  I am closing this case.  gcc-2.96 is too old.  Its release cycle was
finished long ago.  Also we don't support alpha anymore.