Merge pull request #19469 from taosdata/FIX/TD-21851-main

fix: synchronize access within walFsync

source/libs/wal/src/walWrite.c

@@ -635,6 +635,7 @@ int32_t walWrite(SWal *pWal, int64_t index, tmsg_t msgType, const void *body, in
 }
 
 void walFsync(SWal *pWal, bool forceFsync) {
+  taosThreadMutexLock(&pWal->mutex);
   if (forceFsync || (pWal->cfg.level == TAOS_WAL_FSYNC && pWal->cfg.fsyncPeriod == 0)) {
     wTrace("vgId:%d, fileId:%" PRId64 ".idx, do fsync", pWal->cfg.vgId, walGetCurFileFirstVer(pWal));
     if (taosFsyncFile(pWal->pIdxFile) < 0) {
@@ -647,4 +648,5 @@ void walFsync(SWal *pWal, bool forceFsync) {
              strerror(errno));
     }
   }
+  taosThreadMutexUnlock(&pWal->mutex);
 }