applied fix for PG16 sanitizers

abhigets · abhigets · commit 6f1ef95071c0 · 2024-01-12T14:55:53.000Z
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
@@ -1281,7 +1281,8 @@ CopyXLogRecordToWAL(int write_len, bool isLogSwitch, XLogRecData *rdata,
 		}
 
 		Assert(CurrPos % XLOG_BLCKSZ >= SizeOfXLogShortPHD || rdata_len == 0);
-		memcpy(currpos, rdata_data, rdata_len);
+		if (rdata_len > 0)
+			memcpy(currpos, rdata_data, rdata_len);
 		currpos += rdata_len;
 		CurrPos += rdata_len;
 		freespace -= rdata_len;

Original file line number	Diff line number	Diff line change
`@@ -1281,7 +1281,8 @@ CopyXLogRecordToWAL(int write_len, bool isLogSwitch, XLogRecData *rdata,`
`1281`	`1281`	`}`
`1282`	`1282`
`1283`	`1283`	`Assert(CurrPos % XLOG_BLCKSZ >= SizeOfXLogShortPHD \|\| rdata_len == 0);`
`1284`		`- memcpy(currpos, rdata_data, rdata_len);`
	`1284`	`+ if (rdata_len > 0)`
	`1285`	`+ memcpy(currpos, rdata_data, rdata_len);`
`1285`	`1286`	`currpos += rdata_len;`
`1286`	`1287`	`CurrPos += rdata_len;`
`1287`	`1288`	`freespace -= rdata_len;`