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Bug 1441689

Summary:	gawk killed by SIGABRT
Product:	Red Hat Enterprise Linux 7	Reporter:	Paulo Andrade <pandrade>
Component:	gawk	Assignee:	Lukáš Nykrýn <lnykryn>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Martin Klusoň <mkluson>
Severity:	medium	Docs Contact:	Petr Bokoc <pbokoc>
Priority:	urgent
Version:	7.3	CC:	dkochuka, fkrska, jkejda, jreznik, kdudka, lmiksik, mkluson, pandrade
Target Milestone:	rc	Keywords:	EasyFix, Patch, Reproducer, ZStream
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	gawk-4.0.2-5.el7	Doc Type:	Bug Fix
Doc Text:	Gawk no longer terminates unexpectedly Prior to this update, a bug in the gawk utility could sometimes cause it to perform an out of bounds write, which resulted in gawk being killed by a `SIGABRT` signal. This bug has been fixed, and gawk is no longer being terminated unexpectedly.	Story Points:	---
Clone Of:
Clones:	1461115 (view as bug list)		Environment:
Last Closed:	2021-01-15 07:33:57 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:	1461115

Description Paulo Andrade 2017-04-12 13:24:32 UTC

*** Error in `gawk': free(): invalid next size (fast): 0x0000000002dd99b0 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x7c503)[0x7faf4d117503]
gawk(valinfo+0x74)[0x40e434]
gawk(print_vars+0xbe)[0x40e65e]
gawk(dump_vars+0x31)[0x40e691]
gawk(main+0x11a4)[0x408984]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7faf4d0bcb35]
gawk[0x408aa5]

  RHEL 7.3 is missing the second chunk of the commit at:
http://git.savannah.gnu.org/cgit/gawk.git/commit/?id=9fe77c4d6778eb6b0ad377abf702e3472cd40564
and on certain uncommon conditions might write out of
bounds, due to ensuring there is place to write one byte,
but writing two.

Comment 6 Kamil Dudka 2017-05-29 08:53:07 UTC

Looks like an easy to fix off-by-one error.