fix: Seg_exist function crashes when the second parameter is 0

Co-authored-by: liuchenghao
fangfufu · Aug 9, 2021 · 60b8851 · 60b8851 · fangfufu · Aug 29, 2021
1 parent 31617b1
commit 60b8851
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/cache.c b/src/cache.c
@@ -983,7 +983,7 @@ long Cache_read(Cache *cf,  char * const output_buf, const off_t len,
     off_t dl_offset = (offset_start + len) / cf->blksz * cf->blksz;
 
     /* ------------------ Check if the segment already exists ---------------*/
-    if (Seg_exist(cf, dl_offset)) {
+    if (dl_offset == 0 || Seg_exist(cf, dl_offset)) {
         send = Data_read(cf, (uint8_t *) output_buf, len, offset_start);
         goto bgdl;
     } else {