SciLab 5.1 crashes when using kron()

[Emmanuel Ch.]

SciLab 5 (Mar 6 2009 - In Jaunty 9.04 Alpha6) crashes after
trying to get the kronecker product of two large vectors with kron().

Output:

#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0xb7ca3896, pid=3971, tid=3023873744
#
# Java VM: OpenJDK Server VM (14.0-b08 mixed mode linux-x86 )
# Distribution: Ubuntu jaunty (development branch), package 6b14-1.4.1-0ubuntu4
# Problematic frame:
# C [libc.so.6+0x79896] memcpy+0x46
#
# An error report file with more information is saved as:
# /home/mmxgn/hs_err_pid3971.log
#
# If you would like to submit a bug report, please include
# instructions how to reproduce the bug and visit:
# https://bugs.launchpad.net/ubuntu/+source/openjdk-6/
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
Aborted (core dumped)

way to reproduce the bug in a 2GB c2d linux laptop (sony vaio fe31h) with lots of free space:

1 - start scilab
2 - In the scilab console, type:

--> a = 1:1:10000;
--> b = a';
--> kron(a,b);

** CRASHED ** with the output pasted above.

cat /proc/meminfo output (don't know if it's useful tho):

mmxgn@mmxgn-laptop:~$ cat /proc/meminfo
MemTotal: 2060508 kB
MemFree: 1453304 kB
Buffers: 23432 kB
Cached: 317960 kB
SwapCached: 0 kB
Active: 381488 kB
Inactive: 167692 kB
Active(anon): 213812 kB
Inactive(anon): 0 kB
Active(file): 167676 kB
Inactive(file): 167692 kB
Unevictable: 16 kB
Mlocked: 16 kB
HighTotal: 1190472 kB
HighFree: 647776 kB
LowTotal: 870036 kB
LowFree: 805528 kB
SwapTotal: 6032368 kB
SwapFree: 6032368 kB
Dirty: 108 kB
Writeback: 0 kB
AnonPages: 207804 kB
Mapped: 72844 kB
Slab: 21624 kB
SReclaimable: 11528 kB
SUnreclaim: 10096 kB
PageTables: 2616 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 7062620 kB
Committed_AS: 709388 kB
VmallocTotal: 122880 kB
VmallocUsed: 52536 kB
VmallocChunk: 67052 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 4096 kB
DirectMap4k: 40952 kB
DirectMap4M: 864256 kB

[Matthias Klose (doko)]

confirmed with karmic/i386

[Matthias Klose (doko)]

and lucid

[Sylvestre-ledru (sylvestre-ledru)]

a = 1:1:10000;
b = a';
kron(a,b);

=> seg fault

#0 0x00007fffeece1407 in dcopy_ () from /usr/lib/libblas.so.3gf
#1 0x00007ffff53db070 in kronr (a=..., ia=1, ma=1, na=<optimized out>, b=...,
    ib=10000, mb=10000, nb=1, pk=..., ik=10000) at src/fortran/kronr.f:43
#2 0x00007ffff539140e in intkron (id=<optimized out>)
    at sci_gateway/fortran/sci_f_kron.f:163
#3 0x00007ffff5381810 in sci_kron (fname=<optimized out>,
    fname_len=<optimized out>) at sci_gateway/c/sci_kron.c:20
#4 0x00007ffff5381735 in gw_elementary_functions ()
    at sci_gateway/c/gw_elementary_functions.c:76
#5 0x00007ffff7a8cf94 in callinterf_ (k=0x7ffff7d1ffbc)
    at src/c/callinterf.c:142
#6 0x00007ffff7a9943c in scirun_ (startupCode=<optimized out>,
    startupCode_len=<optimized out>) at src/c/scirun.c:127
#7 0x00007ffff7a8783d in realmain (no_startup_flag_l=<optimized out>,
    initial_script=0x0, initial_script_type=SCILAB_SCRIPT, memory=8000000)
    at src/c/realmain.c:154
#8 0x00000000004020cd in main (argc=2, argv=0x7fffffffe1f8)
    at ./modules/console/src/c/others/mainscic.c:175

reported initially here:
https://bugs.launchpad.net/ubuntu/+source/scilab/+bug/347730

[Allan CORNET (allan-cornet)]

already in 4.1.2

[Calixte-denizet (calixte-denizet)]

In this case kron(a,b) is a matrix 10000x10000 !! a test should be added to see if there is enough free space before to make the computation.

[Charlotte-hecquet (charlotte-hecquet)]

Review: https://codereview.scilab.org/#/c/14603/

[Vincent-couvert-q (vincent-couvert-q)]

Fix merged @ http://gitweb.scilab.org/?p=scilab.git;a=commit;h=19484b739a0a54a437f49b870903d5a8fbad7a6e

[François Granade (francois-granade)]

(originally entered in version "5.3.3 final version")