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Subject[PATCH v5 02/12] vsprintf: pre-calculate final string length for later use
Date
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
---
lib/vsprintf.c | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index fe56825..1e08b0d 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1443,13 +1443,14 @@ do { \
case FORMAT_TYPE_STR: {
const char *save_str = va_arg(args, char *);
size_t len;
+
if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE
|| (unsigned long)save_str < PAGE_SIZE)
save_str = "(null)";
- len = strlen(save_str);
- if (str + len + 1 < end)
- memcpy(str, save_str, len + 1);
- str += len + 1;
+ len = strlen(save_str) + 1;
+ if (str + len < end)
+ memcpy(str, save_str, len);
+ str += len;
break;
}

--
1.6.5.2.180.gc5b3e.dirty
--
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