[R-sig-Debian] Taking determinant of a matrix of NAs results in intermittent memory corruption

[Klint Gore]

-----Original Message-----
From: R-SIG-Debian [mailto:r-sig-debian-bounces at r-project.org] On Behalf Of Rolf Turner
Sent: Thursday, 19 January 2017 10:11 AM
To: Ian Erickson
Cc: r-sig-debian at r-project.org
Subject: Re: [R-sig-Debian] [FORGED] Taking determinant of a matrix of NAs results in intermittent memory corruption

>On 19/01/17 11:54, Ian Erickson wrote:
>> Greetings; I've posted the following to R's bug tracking system (at https://bugs.r-project.org/bugzilla/show_bug.cgi?id=17210 ) and Martin Maechler requested that I post to this list as well.
>> If I start R from the command line with --vanilla, then repeatedly execute the following line:
>>
>> det(matrix(nrow=10,ncol=10))
>>
>> ... I eventually get a crash, with error:
>>
>> *** Error in `/usr/lib/R/bin/exec/R': malloc(): memory corruption: 
>> 0x0000000002399400 ***
>>
>> Is anyone able to reproduce?
>
>I can't.  I tried
>
>for(i in 1:100000) det(matrix(nrow=10,ncol=10))

I can.  It's repeatable as well. 
CPU is Intel Xeon E5-2630v3 
Ubuntu 14.04.5 LTS
R from deb http://cran.r-project.org/bin/linux/ubuntu trusty/

R version 3.3.2 (2016-10-31) -- "Sincere Pumpkin Patch"
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Platform: x86_64-pc-linux-gnu (64-bit)

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>  La_version()
[1] "3.5.0"
> system(paste("lsof -p", Sys.getpid(), "| grep -iE '(blas|lapack)'"))
R       25596 kgore4  mem    REG    8,4    39272 118292573 /usr/lib/R/modules/lapack.so
R       25596 kgore4  mem    REG    8,4  5882272 118096040 /usr/lib/lapack/liblapack.so.3.0
R       25596 kgore4  mem    REG    8,4 23058832 118129172 /usr/lib/openblas-base/libblas.so.3
>  det(matrix(nrow=10,ncol=10))
[1] NA
>  det(matrix(nrow=10,ncol=10))
[1] NA
>  det(matrix(nrow=10,ncol=10))
[1] NA
>  det(matrix(nrow=10,ncol=10))
[1] NA
>  det(matrix(nrow=10,ncol=10))
*** Error in `/usr/lib/R/bin/exec/R': malloc(): memory corruption: 0x0000000001393090 ***
Aborted (core dumped)

It doesn't seem to matter what happens after the 4th execution it throws it out.  Eg I just started mashing the keyboard

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> det(matrix(nrow=10,ncol=10))
[1] NA
> det(matrix(nrow=10,ncol=10))
[1] NA
> det(matrix(nrow=10,ncol=10))
[1] NA
> det(matrix(nrow=10,ncol=10))
[1] NA
> sdfsdfjkjsdhfkjsdhfk*** Error in `/usr/lib/R/bin/exec/R': malloc(): memory corruption: 0x00000000025c4090 ***
Aborted (core dumped)
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