https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83430
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-14
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Exceeding the size of the destination should be diagnosed. This is
an easy change to make.
The second problem could and arguably should be detected by
-Wsizeof-pointer-memaccess as it is for functions like strncpy(). It looks
like the warning has all the smarts to do it except for a small limitation in
the sizeof_pointer_memaccess_warning() function. To detect this problem the
function would need to iterate over snprintf arguments starting with the first
one after the format string, and check each for equality to sizeof_arg[idx].
This also looks easy but should probably be made as a separate change from the
above (and tracked by a separate bug).
