!162 fix: lookup new vnode may cause parent vnode freeing

Merge pull request !162 from Far/dev
2021-04-20 18:31:10 +08:00
parent 9fcb67f731 902a11de9a
commit ef4341acea
1 changed files with 2 additions and 0 deletions
--- a/fs/vfs/vnode.c
+++ b/fs/vfs/vnode.c
@@ -398,6 +398,7 @@ static int Step(char **currentDir, struct Vnode **currentVnode, uint32_t flags)
        goto STEP_FINISH;
    }

+    (*currentVnode)->useCount++;
    if (flags & V_DUMMY) {
        ret = ProcessVirtualVnode(*currentVnode, flags, &nextVnode);
    } else {
@@ -407,6 +408,7 @@ static int Step(char **currentDir, struct Vnode **currentVnode, uint32_t flags)
            ret = -ENOSYS;
        }
    }
+    (*currentVnode)->useCount--;

    if (ret == LOS_OK) {
        (void)PathCacheAlloc((*currentVnode), nextVnode, nextDir, len);