[PATCH] D58797: [Sema] Add some compile time _FORTIFY_SOURCE diagnostics

[Nick Desaulniers via Phabricator via cfe-commits]

nickdesaulniers added a comment.

This is causing false positive warnings for the Linux kernel:
https://github.com/ClangBuiltLinux/linux/issues/423
:(

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/statfs.c#n128
Consider this untested case:

  	if (sizeof(buf) == sizeof(*st))
  		memcpy(&buf, st, sizeof(*st));

fs/statfs.c:129:3: warning: 'memcpy' will always overflow; destination buffer has size 64, but size argument is 88 [-Wfortify-source]

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/statfs.c#n169, too.


Repository:
  rC Clang

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D58797/new/

https://reviews.llvm.org/D58797