redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

s390/kaslr: Fix casts in get_random 

commit 788d671517 upstream.

Clang warns:

../arch/s390/boot/kaslr.c:78:25: warning: passing 'char *' to parameter
of type 'const u8 *' (aka 'const unsigned char *') converts between
pointers to integer
types with different sign [-Wpointer-sign]
                                  (char *) entropy, (char *) entropy,
                                                    ^~~~~~~~~~~~~~~~
../arch/s390/include/asm/cpacf.h:280:28: note: passing argument to
parameter 'src' here
                            u8 *dest, const u8 *src, long src_len)
                                                ^
2 warnings generated.

Fix the cast to match what else is done in this function.

Fixes: b2d24b97b2 ("s390/kernel: add support for kernel address space layout randomization (KASLR)")
Link: https://github.com/ClangBuiltLinux/linux/issues/862
Link: https://lkml.kernel.org/r/20200208141052.48476-1-natechancellor@gmail.com
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Nathan Chancellor 2020-02-08 07:10:52 -07:00 committed by Greg Kroah-Hartman
parent e26be26673
commit 148c8531b6
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/s390/boot/kaslr.c
View File

@ -75,7 +75,7 @@ static unsigned long get_random(unsigned long limit)
*(unsigned long *) prng.parm_block ^= seed;
for (i = 0; i < 16; i++) {
cpacf_kmc(CPACF_KMC_PRNG, prng.parm_block,
(char *) entropy, (char *) entropy,
(u8 *) entropy, (u8 *) entropy,
sizeof(entropy));
memcpy(prng.parm_block, entropy, sizeof(entropy));
}