avfilter_graph_parse2
API 概述
avfilter_graph_parse2 是 FFmpeg 中的一个API。该规属于api pair 类型。该规则是使用 ChatDetector 生成的。
规则描述
提示
Parameter 4 of avfilter_graph_parse2 must be released by calling avfilter_inout_free, with the same object passed as the 1-th argument to avfilter_inout_free
信息
标签:api pair
参数下标:3
CWE类别:CWE-404
规则代码
import cpp
import semmle.code.cpp.dataflow.new.DataFlow
DataFlow::Node getSource(FunctionCall fc){
fc.getTarget().hasName("avfilter_graph_parse2")
and result.asExpr() = fc.getArgument(3)
}
DataFlow::Node getSink(FunctionCall fc){
fc.getTarget().hasName("avfilter_inout_free")
and result.asExpr() = fc.getArgument(0)
}
FunctionCall freeTarget(FunctionCall malloc){
DataFlow::localFlow(getSource(malloc), getSink(result))
}
from FunctionCall fc
where fc.getTarget().hasName("avfilter_graph_parse2")
and not exists(
FunctionCall free|
free = freeTarget(fc)
)
select fc.getLocation()