Arnd Bergmann <[email protected]> writes: > After the latest change to make sure the compiler actually does a memset, > it is now smart enough to flag the stack overflow at compile time, > at least with gcc-7.0: > > drivers/misc/lkdtm_bugs.c: In function 'lkdtm_CORRUPT_STACK': > drivers/misc/lkdtm_bugs.c:88:144: warning: 'memset' writing 64 bytes into a > region of size 8 overflows the destination [-Wstringop-overflow=] > > To outsmart the compiler again, this moves the memset into a noinline > function where (for now) it doesn't see that we intentionally write > broken code here.
Heh, darn it. I suspect this is an arms race we are eventually going to lose. At some point we might have to switch to writing some of these in asm :/ cheers
