Public bug reported:
This is http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=608255 fixed in
later package versions:
bc depends on uninitialized mem:
echo "e(1)" | MALLOC_PERTURB_=1 bc -l
echo "e(1)" | MALLOC_PERTURB_=0 bc -l
2.71828182845904523536
This fixes it:
--- storage.c.orig 2010-12-21 19:43:14.663540110 +0000
+++ storage.c 2010-12-21 19:42:01.392540111 +0000
@@ -99,6 +99,7 @@
{
f = &functions[indx];
f->f_defined = FALSE;
+ f->f_void = FALSE;
f->f_body = (char *) bc_malloc (BC_START_SIZE);
f->f_body_size = BC_START_SIZE;
f->f_code_size = 0;
IMPACT:
"bc" mathlib routines fail when running under the MALLOC_PERTURB_ environment
used by some paranoid people.
TEST CASE:
The command 'echo "e(1)" | MALLOC_PERTURB_=1 bc -l' should return
'2.71828182845904523536' instead of nothing.
REGRESSION POTENTIAL:
Extremely low -- this fix is included in later package versions and fixes the
problem.
** Affects: bc (Ubuntu)
Importance: Undecided
Status: Fix Released
** Affects: bc (Ubuntu Precise)
Importance: Undecided
Status: New
** Affects: bc (Debian)
Importance: Unknown
Status: Unknown
** Bug watch added: Debian Bug tracker #608255
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=608255
** Also affects: bc via
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=608255
Importance: Unknown
Status: Unknown
** No longer affects: bc
** Also affects: bc (Debian) via
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=608255
Importance: Unknown
Status: Unknown
** Also affects: bc (Ubuntu Precise)
Importance: Undecided
Status: New
** Changed in: bc (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1259656
Title:
bc uses uninitialized memory
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