GNU bug report logs - #29032
grep 3.x: 2.4MB big file causes 'Value too large for defined data type'

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

From: Uwe Sauter <uwe.sauter.de <at> gmail.com>
To: bug-grep <at> gnu.org
Subject: grep 3.x: 2.4MB big file causes 'Value too large for defined data
 type'
Date: Fri, 27 Oct 2017 23:32:38 +0200

[Message part 1 (text/plain, inline)]

Hi,

I have several small files where grep'ing for a static string results in 'Value too large for defined data type'.

E.g.

$ grep 123456 2fort.bsp
grep: 2fort.bsp: Value too large for defined data type

But grep'ing for a shorter search string succeeds:

$ grep 123 2fort.bsp
grep: 2fort.bsp matches

2fort.bsp has size 2488684 bytes.

This happens on an up-to date Gentoo with kernel 4.12.12 and glibc 2.23. Installed grep is version 3.0.

Linux kiste 4.12.12-gentoo #1 SMP Tue Sep 19 20:07:27 CEST 2017 x86_64 Intel(R) Xeon(R) CPU E3-1245 v3 @ 3.40GHz
GenuineIntel GNU/Linux



For debugging I downloaded both 3.0 and 3.1 and compiled with

$ CFLAGS="${CFLAGS} -ggdb" CPPFLAGS="${CPPFLAGS} -ggdb" ./configure --enable-gcc-warnings
$ make

Both versions show the same failure.

I'd like to help debugging but don't know where I should start looking in the source code. Any hint is appreciated.

I also prepared a strace output for grep 3.1 (attached).


Regards,

	Uwe

[grep_3.1.strace (text/plain, attachment)]

Message #8 received at 29032 <at> debbugs.gnu.org (full text, mbox):

From: Uwe Sauter <uwe.sauter.de <at> gmail.com>
To: 29032 <at> debbugs.gnu.org
Subject: Re: grep 3.x: 2.4MB big file causes 'Value too large for defined data
 type'
Date: Sat, 28 Oct 2017 20:42:33 +0200

Hi again,

as I was able to reproduce this with other utilities as well I conclude that this is not a bug in grep but in perhaps in
glibc or more probably in ntfs-3g. The files I was reading are from a disk image created with ddrescue and contain a
NTFS partition.


Sorry for the noise,

    Uwe

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