Hello,
In vm_map.c, in the vm_map_insert(...) function there is the following
piece of code which checks if the addresses supplied to the function are
valid:
**
if ((start < map->min_offset) || (end > map->max_offset) ||
(start >= end))
return (KERN_INVALID_ADDRESS);
**
Specifically, I am interested in the final comparison. Is it possible
that start == end could ever be correct? Do zero sized entries ever get
inserted? (I don't see why you would ever wish to do this, please
explain it to me if there is a reason).
Normally I'd submit a PR about this but since its not an area of the
code I am very familiar with I thought I'd ask. I would also supply a
patch but for a one character change it seems pretty silly.
Thanks,
--
Dominic
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