Update Linux to v5.4.148
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.4.148.tar.gz
Change-Id: Ib3d26c5ba9b022e2e03533005c4fed4d7c30b61b
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/include/linux/string.h b/include/linux/string.h
index b6ccdc2..b226435 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -269,6 +269,31 @@
void __write_overflow(void) __compiletime_error("detected write beyond size of object passed as 1st parameter");
#if !defined(__NO_FORTIFY) && defined(__OPTIMIZE__) && defined(CONFIG_FORTIFY_SOURCE)
+
+#ifdef CONFIG_KASAN
+extern void *__underlying_memchr(const void *p, int c, __kernel_size_t size) __RENAME(memchr);
+extern int __underlying_memcmp(const void *p, const void *q, __kernel_size_t size) __RENAME(memcmp);
+extern void *__underlying_memcpy(void *p, const void *q, __kernel_size_t size) __RENAME(memcpy);
+extern void *__underlying_memmove(void *p, const void *q, __kernel_size_t size) __RENAME(memmove);
+extern void *__underlying_memset(void *p, int c, __kernel_size_t size) __RENAME(memset);
+extern char *__underlying_strcat(char *p, const char *q) __RENAME(strcat);
+extern char *__underlying_strcpy(char *p, const char *q) __RENAME(strcpy);
+extern __kernel_size_t __underlying_strlen(const char *p) __RENAME(strlen);
+extern char *__underlying_strncat(char *p, const char *q, __kernel_size_t count) __RENAME(strncat);
+extern char *__underlying_strncpy(char *p, const char *q, __kernel_size_t size) __RENAME(strncpy);
+#else
+#define __underlying_memchr __builtin_memchr
+#define __underlying_memcmp __builtin_memcmp
+#define __underlying_memcpy __builtin_memcpy
+#define __underlying_memmove __builtin_memmove
+#define __underlying_memset __builtin_memset
+#define __underlying_strcat __builtin_strcat
+#define __underlying_strcpy __builtin_strcpy
+#define __underlying_strlen __builtin_strlen
+#define __underlying_strncat __builtin_strncat
+#define __underlying_strncpy __builtin_strncpy
+#endif
+
__FORTIFY_INLINE char *strncpy(char *p, const char *q, __kernel_size_t size)
{
size_t p_size = __builtin_object_size(p, 0);
@@ -276,14 +301,14 @@
__write_overflow();
if (p_size < size)
fortify_panic(__func__);
- return __builtin_strncpy(p, q, size);
+ return __underlying_strncpy(p, q, size);
}
__FORTIFY_INLINE char *strcat(char *p, const char *q)
{
size_t p_size = __builtin_object_size(p, 0);
if (p_size == (size_t)-1)
- return __builtin_strcat(p, q);
+ return __underlying_strcat(p, q);
if (strlcat(p, q, p_size) >= p_size)
fortify_panic(__func__);
return p;
@@ -297,7 +322,7 @@
/* Work around gcc excess stack consumption issue */
if (p_size == (size_t)-1 ||
(__builtin_constant_p(p[p_size - 1]) && p[p_size - 1] == '\0'))
- return __builtin_strlen(p);
+ return __underlying_strlen(p);
ret = strnlen(p, p_size);
if (p_size <= ret)
fortify_panic(__func__);
@@ -330,7 +355,7 @@
__write_overflow();
if (len >= p_size)
fortify_panic(__func__);
- __builtin_memcpy(p, q, len);
+ __underlying_memcpy(p, q, len);
p[len] = '\0';
}
return ret;
@@ -343,12 +368,12 @@
size_t p_size = __builtin_object_size(p, 0);
size_t q_size = __builtin_object_size(q, 0);
if (p_size == (size_t)-1 && q_size == (size_t)-1)
- return __builtin_strncat(p, q, count);
+ return __underlying_strncat(p, q, count);
p_len = strlen(p);
copy_len = strnlen(q, count);
if (p_size < p_len + copy_len + 1)
fortify_panic(__func__);
- __builtin_memcpy(p + p_len, q, copy_len);
+ __underlying_memcpy(p + p_len, q, copy_len);
p[p_len + copy_len] = '\0';
return p;
}
@@ -360,7 +385,7 @@
__write_overflow();
if (p_size < size)
fortify_panic(__func__);
- return __builtin_memset(p, c, size);
+ return __underlying_memset(p, c, size);
}
__FORTIFY_INLINE void *memcpy(void *p, const void *q, __kernel_size_t size)
@@ -375,7 +400,7 @@
}
if (p_size < size || q_size < size)
fortify_panic(__func__);
- return __builtin_memcpy(p, q, size);
+ return __underlying_memcpy(p, q, size);
}
__FORTIFY_INLINE void *memmove(void *p, const void *q, __kernel_size_t size)
@@ -390,7 +415,7 @@
}
if (p_size < size || q_size < size)
fortify_panic(__func__);
- return __builtin_memmove(p, q, size);
+ return __underlying_memmove(p, q, size);
}
extern void *__real_memscan(void *, int, __kernel_size_t) __RENAME(memscan);
@@ -416,7 +441,7 @@
}
if (p_size < size || q_size < size)
fortify_panic(__func__);
- return __builtin_memcmp(p, q, size);
+ return __underlying_memcmp(p, q, size);
}
__FORTIFY_INLINE void *memchr(const void *p, int c, __kernel_size_t size)
@@ -426,7 +451,7 @@
__read_overflow();
if (p_size < size)
fortify_panic(__func__);
- return __builtin_memchr(p, c, size);
+ return __underlying_memchr(p, c, size);
}
void *__real_memchr_inv(const void *s, int c, size_t n) __RENAME(memchr_inv);
@@ -457,11 +482,22 @@
size_t p_size = __builtin_object_size(p, 0);
size_t q_size = __builtin_object_size(q, 0);
if (p_size == (size_t)-1 && q_size == (size_t)-1)
- return __builtin_strcpy(p, q);
+ return __underlying_strcpy(p, q);
memcpy(p, q, strlen(q) + 1);
return p;
}
+/* Don't use these outside the FORITFY_SOURCE implementation */
+#undef __underlying_memchr
+#undef __underlying_memcmp
+#undef __underlying_memcpy
+#undef __underlying_memmove
+#undef __underlying_memset
+#undef __underlying_strcat
+#undef __underlying_strcpy
+#undef __underlying_strlen
+#undef __underlying_strncat
+#undef __underlying_strncpy
#endif
/**