Unverified Commit 564d6bbe authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!11745 powerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas() 

Merge Pull Request from: @ci-robot 
 
PR sync from: Bowen You <youbowen2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/2UDXHTSEKATU6GIXSB2LSGQOV2HOYDB7/ 
 
https://gitee.com/src-openeuler/kernel/issues/IARWPW 
 
Link:https://gitee.com/openeuler/kernel/pulls/11745

 

Reviewed-by: default avatarZhang Jianhua <chris.zjh@huawei.com>
Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
parents 670bc4d3 f38343c0

arch/powerpc/kernel/rtas.c

+4 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/completion.h>

#include <linux/cpumask.h>

#include <linux/memblock.h>

#include <linux/nospec.h>

#include <linux/slab.h>

#include <linux/reboot.h>

#include <linux/syscalls.h>
@@ -1168,6 +1169,9 @@ SYSCALL_DEFINE1(rtas, struct rtas_args __user *, uargs) 
	    || nargs + nret > ARRAY_SIZE(args.args))

		return -EINVAL;



	nargs = array_index_nospec(nargs, ARRAY_SIZE(args.args));

	nret = array_index_nospec(nret, ARRAY_SIZE(args.args) - nargs);



	/* Copy in args. */

	if (copy_from_user(args.args, uargs->args,

			   nargs * sizeof(rtas_arg_t)) != 0)