Re: [Patch] Zoran strncpy() cleanup

From: Horst Schirmeier
Date: Mon Jun 05 2006 - 17:01:36 EST

On Mon, 05 Jun 2006, Eric Sesterhenn wrote:
> hi,
> this was spotted by coverity ( bug id #536 ). While
> it is not really a bug, i think we should clean it up.
> std->name can only hold 24 chars, not 32 as the strncpy() calls
> suggest. std->name can hold 32 chars, but since we use constant
> fixed-sized strings, which will always fit into these arrays, i changed
> the strncpy() calls to strcpy(). If you prefer strncpy(foo->name, "bar", sizeof(foo->name))
> please let me know and i redo the patch.
> Signed-off-by: Eric Sesterhenn <snakebyte@xxxxxx>

This _is_ really a bug. strncpy() pads the remaining bytes of dest with
zeroes, which destroys parts of the v4l2_standard structure (in
particular, the v4l2_fract substructure). I'd suggest not to use
strcpy() although it's safe here -- until someone changes the structure

Kind regards,

PGP-Key 0xD40E0E7A
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