<s>
In	O
computing	O
a	O
storage	B-General_Concept
violation	I-General_Concept
is	O
a	O
hardware	O
or	O
software	O
fault	B-Application
that	O
occurs	O
when	O
a	O
task	B-General_Concept
attempts	O
to	O
access	O
an	O
area	O
of	O
computer	B-General_Concept
storage	I-General_Concept
which	O
it	O
is	O
not	O
permitted	O
to	O
access	O
.	O
</s>
<s>
Storage	B-General_Concept
violation	I-General_Concept
can	O
,	O
for	O
instance	O
,	O
consist	O
of	O
reading	O
from	O
,	O
writing	O
to	O
,	O
or	O
freeing	O
storage	O
not	O
owned	O
by	O
the	O
task	B-General_Concept
.	O
</s>
<s>
A	O
common	O
type	O
of	O
storage	B-General_Concept
violation	I-General_Concept
is	O
known	O
as	O
a	O
stack	B-General_Concept
buffer	I-General_Concept
overflow	I-General_Concept
where	O
a	O
program	O
attempts	O
to	O
exceed	O
the	O
limits	O
set	O
for	O
its	O
call	B-General_Concept
stack	I-General_Concept
.	O
</s>
<s>
It	O
can	O
also	O
refer	O
to	O
attempted	O
modification	O
of	O
memory	O
"	O
owned	O
"	O
by	O
another	O
thread	O
where	O
there	O
is	O
incomplete	O
(	O
or	O
no	O
)	O
memory	B-General_Concept
protection	I-General_Concept
.	O
</s>
<s>
Storage	B-General_Concept
violations	I-General_Concept
can	O
occur	O
in	O
transaction	O
systems	O
such	O
as	O
CICS	B-Application
in	O
circumstances	O
where	O
it	O
is	O
possible	O
to	O
write	O
to	O
storage	O
not	O
owned	O
by	O
the	O
transaction	O
;	O
such	O
violations	O
can	O
be	O
reduced	O
by	O
enabling	O
features	O
such	O
as	O
storage	B-General_Concept
protection	I-General_Concept
and	O
transaction	B-General_Concept
isolation	I-General_Concept
.	O
</s>
<s>
Storage	B-General_Concept
violations	I-General_Concept
can	O
be	O
difficult	O
to	O
detect	O
as	O
a	O
program	O
can	O
often	O
run	O
for	O
a	O
period	O
of	O
time	O
after	O
the	O
violation	O
before	O
it	O
crashes	O
.	O
</s>
<s>
In	O
systems	O
such	O
as	O
CICS	B-Application
,	O
storage	B-General_Concept
violations	I-General_Concept
are	O
sometimes	O
detected	O
(	O
by	O
the	O
CICS	B-Application
kernel	B-Operating_System
)	O
by	O
the	O
use	O
of	O
"	O
signatures	O
"	O
,	O
which	O
can	O
be	O
tested	O
to	O
see	O
if	O
they	O
have	O
been	O
overlaid	O
.	O
</s>
<s>
An	O
alternative	O
runtime	O
library	O
may	O
be	O
used	O
to	O
better	O
detect	O
storage	B-General_Concept
violations	I-General_Concept
,	O
at	O
the	O
cost	O
of	O
additional	O
overhead	O
.	O
</s>
<s>
Some	O
programming	O
languages	O
use	O
software	O
bounds	B-Data_Structure
checking	I-Data_Structure
to	O
prevent	O
these	O
occurrences	O
.	O
</s>
