* bug#15100: Division by zero in bytevector->uint-list
@ 2013-08-15 11:02 Göran Weinholt
2013-08-17 3:19 ` Mark H Weaver
0 siblings, 1 reply; 2+ messages in thread
From: Göran Weinholt @ 2013-08-15 11:02 UTC (permalink / raw)
To: 15100
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Hello schemers,
the bytevector->uint-list procedure from (rnrs) can crash Guile through
a division by zero:
scheme@(guile-user)> (import (rnrs))
scheme@(guile-user)> (bytevector->uint-list #vu8(0) 'x 0)
Floating point exception
The same happens with bytevector->sint-list. These procedures also do
not check that the length of the bytevector is divisible by the size.
Tested with GNU Guile 2.0.9.71-8d5d04.
Regards,
--
Göran Weinholt <goran@weinholt.se>
"What's worse than clowns? Danish clowns."
-- Mystery Science Theatre 3000
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^ permalink raw reply [flat|nested] 2+ messages in thread
* bug#15100: Division by zero in bytevector->uint-list
2013-08-15 11:02 bug#15100: Division by zero in bytevector->uint-list Göran Weinholt
@ 2013-08-17 3:19 ` Mark H Weaver
0 siblings, 0 replies; 2+ messages in thread
From: Mark H Weaver @ 2013-08-17 3:19 UTC (permalink / raw)
To: Göran Weinholt; +Cc: 15100-done
Göran Weinholt <goran@weinholt.se> writes:
> the bytevector->uint-list procedure from (rnrs) can crash Guile through
> a division by zero:
>
> scheme@(guile-user)> (import (rnrs))
> scheme@(guile-user)> (bytevector->uint-list #vu8(0) 'x 0)
> Floating point exception
>
> The same happens with bytevector->sint-list.
Fixed in 088cfb7d761b01a2620d78f10e8dbcaa07485a32.
> These procedures also do not check that the length of the bytevector
> is divisible by the size.
I don't think we can fix this in stable-2.0, because some existing code
might depend on our current permissive behavior. However, I fixed it on
the master branch in c099201da1de71652b9791fb0a3a863b6d3c355d.
Thanks!
Mark
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2013-08-15 11:02 bug#15100: Division by zero in bytevector->uint-list Göran Weinholt
2013-08-17 3:19 ` Mark H Weaver
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