cpio extraction currently does a memcpy to ensure that the archive hex
fields are null terminated for simple_strtoul(). simple_strntoul() will
allow us to avoid the memcpy.
Signed-off-by: David Disseldorp <ddiss@xxxxxxx>
---
include/linux/kstrtox.h | 1 +
lib/vsprintf.c | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/include/linux/kstrtox.h b/include/linux/kstrtox.h
index 7fcf29a4e0de4..6ea897222af1d 100644
--- a/include/linux/kstrtox.h
+++ b/include/linux/kstrtox.h
@@ -143,6 +143,7 @@ static inline int __must_check kstrtos32_from_user(const char __user *s, size_t
*/
extern unsigned long simple_strtoul(const char *,char **,unsigned int);
+extern unsigned long simple_strntoul(const char *,char **,unsigned int,size_t);
extern long simple_strtol(const char *,char **,unsigned int);
extern unsigned long long simple_strtoull(const char *,char **,unsigned int);
extern long long simple_strtoll(const char *,char **,unsigned int);
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index c5e2ec9303c5d..32eacaae97990 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -114,6 +114,13 @@ unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
}
EXPORT_SYMBOL(simple_strtoul);
+unsigned long simple_strntoul(const char *cp, char **endp, unsigned int base,
+ size_t max_chars)
+{
+ return simple_strntoull(cp, endp, base, max_chars);
+}
+EXPORT_SYMBOL(simple_strntoul);
+
/**
* simple_strtol - convert a string to a signed long
* @cp: The start of the string
--
2.43.0
