GNU bug report logs - #25024
build: adjust for ASAN/UBSAN

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Marcel Böhme <boehme.marcel <at> gmail.com>
To: bug-coreutils <at> gnu.org
Subject: Bug in Sort
Date: Fri, 25 Nov 2016 14:18:01 +0800

Dear all,

The following execution is flagged by UBSAN as undefined behaviour:

$ echo 0 > a; printf "%0.s0" {1..58} >> a
$ ./sort -R a

UBSAN says:
../lib/md5.c:371:7: runtime error: load of misaligned address 0x7ffdfd45a10d for type 'const uint32_t', which requires 4 byte alignment 

So, the root cause might actually be in GNULIB. The bug was found with AFLFast, a fork of AFL.

Best regards,
- Marcel

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