in_winevtlog: Plug a negative overflow possibility

cosmo0920 · edsiper · commit 20a63b867fe8 · 2025-10-02T17:58:19.000-06:00
Signed-off-by: Hiroshi Hatake &lt;hiroshi@chronosphere.io&gt;
diff --git a/plugins/in_winevtlog/winevtlog.c b/plugins/in_winevtlog/winevtlog.c
@@ -734,6 +734,9 @@ static DWORD calc_backoff_ms(struct winevtlog_channel *ch, const struct winevtlo
     span = (LONG)((ms * jitter) / 100);
     delta = (LONG)(prng16(&ch->prng_state) % (2 * span + 1)) - span;
     with_jitter = (LONG)ms + delta;
+    if (with_jitter < 0) {
+        with_jitter = 0;
+    }
     return (DWORD)with_jitter;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -734,6 +734,9 @@ static DWORD calc_backoff_ms(struct winevtlog_channel *ch, const struct winevtlo`
`734`	`734`	`span = (LONG)((ms * jitter) / 100);`
`735`	`735`	`delta = (LONG)(prng16(&ch->prng_state) % (2 * span + 1)) - span;`
`736`	`736`	`with_jitter = (LONG)ms + delta;`
	`737`	`+ if (with_jitter < 0) {`
	`738`	`+ with_jitter = 0;`
	`739`	`+ }`
`737`	`740`	`return (DWORD)with_jitter;`
`738`	`741`	`}`
`739`	`742`