On Wed, Oct 23, 2019 at 12:19:10PM -0500, Segher Boessenkool wrote: > I of course know that for e.g. strcmp or strlen we need to be careful of > page crossings; but this is strncmp, which has a size argument saying the > size of the array objects of its arguments!
https://pubs.opengroup.org/onlinepubs/009695399/functions/strncmp.html The strncmp() function shall compare not more than n bytes (bytes that follow a null byte are not compared) from the array pointed to by s1 to the array pointed to by s2. In particular the second line. Similarly C11 7.24.4.4: The strncmp function compares not more than n characters (characters that follow a null character are not compared) from the array pointed to by s1 to the array pointed to by s2. Similarly C99. Jakub
