4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: Kees Cook <[email protected]> commit 9988f4d577f42f43b7612d755477585f35424af7 upstream. This fixes build errors seen on gcc-4.9.3 or gcc-5.3.1 for an ARM: arm-soc/init/initramfs.c: In function 'error': arm-soc/init/initramfs.c:50:1: error: unrecognizable insn: } ^ (insn 26 25 27 5 (set (reg:SI 111 [ local_entropy.243 ]) (rotatert:SI (reg:SI 116 [ local_entropy.243 ]) (const_int -30 [0xffffffffffffffe2]))) -1 (nil)) Patch from PaX Team <[email protected]> Reported-by: Arnd Bergmann <[email protected]> Reported-by: Brad Spengler <[email protected]> Signed-off-by: Kees Cook <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- scripts/gcc-plugins/latent_entropy_plugin.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/scripts/gcc-plugins/latent_entropy_plugin.c +++ b/scripts/gcc-plugins/latent_entropy_plugin.c @@ -328,9 +328,9 @@ static enum tree_code get_op(tree *rhs) op = LROTATE_EXPR; /* * This code limits the value of random_const to - * the size of a wide int for the rotation + * the size of a long for the rotation */ - random_const &= HOST_BITS_PER_WIDE_INT - 1; + random_const %= TYPE_PRECISION(long_unsigned_type_node); break; }
