Re: [PATCH 2.6]: IPv6: strcpy -> strlcpy

[Russell King]

On Thu, Nov 27, 2003 at 10:19:28PM +0000, Russell King wrote:
> Note: we should really fix the generic strncpy() - there are places in
> the kernel source which rely on the x86 strncpy() behaviour today (eg,
> binfmt_*.c core file generation.)

Sorry, bad example.  Hmm, from a glance around, it seems that all of
the places which use strncpy() implicitly zero the buffer prior to
using strncpy().

This means that the x86 strncpy is doing unnecessary zeroing.  I do
remember Alan complaining about the last set of strlcpy() stuff
introducing information leaks - maybe those got fixed though.

Ok, I don't know where the kernel stands on this issue anymore.
Can someone definitively provide a statement of exactly what the
kernel expects of strncpy() ?

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
                 2.6 Serial core
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