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

Merge pull request !162 from Far/dev
This commit is contained in:
openharmony_ci 2021-04-20 18:31:10 +08:00 committed by Gitee
parent 9fcb67f731 902a11de9a
commit ef4341acea
1 changed files with 2 additions and 0 deletions
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2
fs/vfs/vnode.c
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@ -398,6 +398,7 @@ static int Step(char **currentDir, struct Vnode **currentVnode, uint32_t flags)
goto STEP_FINISH; goto STEP_FINISH;
} }
(*currentVnode)->useCount++;
if (flags & V_DUMMY) { if (flags & V_DUMMY) {
ret = ProcessVirtualVnode(*currentVnode, flags, &nextVnode); ret = ProcessVirtualVnode(*currentVnode, flags, &nextVnode);
} else { } else {
@ -407,6 +408,7 @@ static int Step(char **currentDir, struct Vnode **currentVnode, uint32_t flags)
ret = -ENOSYS; ret = -ENOSYS;
} }
} }
(*currentVnode)->useCount--;
if (ret == LOS_OK) { if (ret == LOS_OK) {
(void)PathCacheAlloc((*currentVnode), nextVnode, nextDir, len); (void)PathCacheAlloc((*currentVnode), nextVnode, nextDir, len);