find_writeable_file_locked

API 概述

find_writeable_file_locked 是 Linux kernel 中的一个API。该规属于api pair 类型。该规则是使用 APISpecGen 生成的。

规则描述

提示

The resource acquired by find_writeable_file_locked must be properly released using nfsd_file_put

信息

标签：api pair

参数下标：N/A

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("find_writeable_file_locked")
  and result.asExpr() = fc
}

DataFlow::Node getSink(FunctionCall fc){
  fc.getTarget().hasName("nfsd_file_put")
  and result.asExpr() = fc.getArgument(0)
}

FunctionCall freeTarget(FunctionCall malloc){
  DataFlow::localFlow(getSource(malloc), getSink(result))
}

from FunctionCall fc
where fc.getTarget().hasName("find_writeable_file_locked")
      and not exists(
        FunctionCall free| 
        free = freeTarget(fc)
      )
select fc.getLocation()