lkdtm: cfi: Fix type width for masking PAC bits
authorKees Cook <keescook@chromium.org>
Wed, 27 Apr 2022 00:12:26 +0000 (17:12 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 9 May 2022 13:40:31 +0000 (15:40 +0200)
commit77acbdc0f314b7040afcc02be267fe71161f4ac7
tree22af614a0a36dc42dafea3840ef9b254763f607b
parentf861d36e021e1ac4a0a2a1f6411d623809975d63
lkdtm: cfi: Fix type width for masking PAC bits

The masking for PAC bits wasn't handling 32-bit architectures correctly.
Replace the u64 cast with uintptr_t.

Link: https://lore.kernel.org/lkml/CAMuHMdVz-J-1ZQ08u0bsQihDkcRmEPrtX5B_oRJ+Ns5jrasnUw@mail.gmail.com
Fixes: 2e53b877dc12 ("lkdtm: Add CFI_BACKWARD to test ROP mitigations")
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220427001226.1224704-1-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/misc/lkdtm/cfi.c