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malformed elf causes invalid shiftleft in readelf -S with ubsan

From: Hanno Böck <hanno at hboeck.de>
To: elfutils-devel at lists dot fedorahosted dot org
Date: Sun, 25 Jan 2015 20:42:03 +0100
Subject: malformed elf causes invalid shiftleft in readelf -S with ubsan

Hi,

When compiling elfutils with undefined behaviour sanitizer
(-fsanitize=undefined) a warning will be shown indicating an invalid
shiftleft operation on the attached elf file:

readelf.c:1133:28: runtime error: left shift of 1 by 31 places cannot
be represented in type 'int'

Tested with elfutils-0.161. This was found with zzuf.

cu,
-- 
Hanno Böck
http://hboeck.de/

mail/jabber: hanno@hboeck.de
GPG: BBB51E42

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