Bug 88104
| Summary: | uinitialized variable used for __ieee754_gammal_r(NaN,) | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | John Reiser <jreiser> |
| Component: | glibc | Assignee: | Jakub Jelinek <jakub> |
| Status: | CLOSED ERRATA | QA Contact: | Brian Brock <bbrock> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 9 | CC: | fweimer |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2003-04-09 19:21:39 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: | |||
An errata has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2003-136.html |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.0) Gecko/20020529 Description of problem: __tgammal(NaN) tests an uninitialized local variable because __ieee754_gammal_r does not set *signgam for a NaN. -----sysdeps/generic/w_tgammal.c:37 y = __ieee754_gammal_r(x,&local_signgam); if (local_signgam < 0) y = -y; ----- -----sysdeps/ieee754/ldbl-96/e_gammal_r.c:47 if ((es & 0x7fff) == 0x7fff && ((hx & 0x7fffffff) | lx) != 0) /* NaN, return it. */ return x; ----- Version-Release number of selected component (if applicable): glibc-2.3.2-11.9 How reproducible: Always Steps to Reproduce: 1.Run testcase math/test-ldouble and watch when x==NaN. 2. 3. Actual Results: local_signgam is tested even though its value has not been set. Expected Results: local_signgam is tested only when its value has been set. Additional info: It would be more efficient if __ieee754_gammal_r just set "*signgam = 0;" immediately upon entry, instead of for [almost-]every boundary case.