On Tue, 5 Mar 2019, Finn Thain wrote:
Looks bogus to me. If you change memcpy to __builtin_memcpy, then we avoid the macro and the warning changes to, ./include/linux/string.h:456:3: warning: '__builtin_memcpy' forming offset [7, 8] is out of the bounds [0, 6] [-Warray-bounds] __builtin_memcpy(dest, src, dest_len); The compiler has nothing to complain about here. dest is known to be id->fr and dest_len is known to be sizeof(id->fr). The error message indicates that gcc has applied the bounds [0, 6] to dest when in fact those are the bounds for src.
My mistake. GCC is right, it seems memcpy will read past the end of "5.0.0+". --
