GPU/FIFO: avoid possible invalid memory accesses #657
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1) ensure pKernelFifo->ppChidMgr[i]->pChanGrpTree is successfully allocated in function kfifoChidMgrConstruct_IMPL(), otherwise it may cause invalid memory access when calling mapFine(). 2) only invoke mapDestroy() when pKernelFifo->ppChidMgr[i]->pChanGrpTree is not NULL in function kfifoChidMgrDestruct_IMPL(), otherwise it may cause invalid memory access. 3) ensure pChidMgr is valid in function kfifoGetChannelGroup_IMPL(). Signed-off-by: Jiang Liu <gerry@linux.alibaba.com>
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allocated in function kfifoChidMgrConstruct_IMPL(), otherwise
it may cause invalid memory access when calling mapFine().
is not NULL in function kfifoChidMgrDestruct_IMPL(), otherwise
it may cause invalid memory access.