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Diffstat (limited to 'arch/xtensa')
-rw-r--r--arch/xtensa/include/asm/uaccess.h1
-rw-r--r--arch/xtensa/kernel/ptrace.c3
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h
index 82d4e38..3fa526f 100644
--- a/arch/xtensa/include/asm/uaccess.h
+++ b/arch/xtensa/include/asm/uaccess.h
@@ -17,6 +17,7 @@
#define _XTENSA_UACCESS_H
#include <linux/errno.h>
+#include <linux/prefetch.h>
#include <asm/types.h>
#define VERIFY_READ 0
diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c
index c72c947..a0d042a 100644
--- a/arch/xtensa/kernel/ptrace.c
+++ b/arch/xtensa/kernel/ptrace.c
@@ -147,6 +147,9 @@ int ptrace_setxregs(struct task_struct *child, void __user *uregs)
elf_xtregs_t *xtregs = uregs;
int ret = 0;
+ if (!access_ok(VERIFY_READ, uregs, sizeof(elf_xtregs_t)))
+ return -EFAULT;
+
#if XTENSA_HAVE_COPROCESSORS
/* Flush all coprocessors before we overwrite them. */
coprocessor_flush_all(ti);