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kernel_liteos_a
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fix: lookup new vnode may cause parent vnode freeing 

Close #I3MYP4

Change-Id: I533f4bacaf7e6dd500f5ac3ce4f5343b3b885988
This commit is contained in:
Far 2021-04-20 11:43:14 +08:00
parent 7ba0bfa800
commit 902a11de9a
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);