[SCTP] Fix overflow in the macros JIFFIES_TO_MSECS/MSECS_TO_JIFFIES

when used with large values.

[SCTP] Fix overflow in the macros JIFFIES_TO_MSECS/MSECS_TO_JIFFIES
when used with large values.
c4fdf856 · Sridhar Samudrala · ce0369a4 · c4fdf856
Commit c4fdf856 authored Nov 13, 2003 by Sridhar Samudrala
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include/net/sctp/sctp.h include/net/sctp/sctp.h +4 -2

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--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -116,8 +116,10 @@
 #define SCTP_STATIC static
 #endif

-#define MSECS_TO_JIFFIES(msec) (msec * HZ / 1000)
-#define JIFFIES_TO_MSECS(jiff) (jiff * 1000 / HZ)
+#define MSECS_TO_JIFFIES(msec) \
+	(((msec / 1000) * HZ) + ((msec % 1000) * HZ) / 1000)
+#define JIFFIES_TO_MSECS(jiff) \
+	(((jiff / HZ) * 1000) + ((jiff % HZ) * 1000) / HZ)

 /*
 * Function declarations.