| Issue |
81597
|
| Summary |
false positive: `Argument to free() is the address of ..., which is not memory allocated by malloc()`
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
phlax
|
we are seeing the above error in our CI (running clang-tidy on the https://github.com/envoyproxy/envoy project)
it would appear this is a false positive that should not trigger on a member function
full log:
```console
/b/f/w/source/common/stats/symbol_table.cc:623:3: error: Argument to free() is the address of a local stack variable, which is not memory allocated by malloc() [clang-analyzer-unix.Malloc,-warnings-as-errors]
table.free(statName());
^
/b/f/w/source/common/stats/symbol_table.cc:629:5: note: Calling 'StatNameStorage::free'
storage.free(symbol_table_);
^~~~~~~~~~~~~~~~~~~~~~~~~~~
/b/f/w/source/common/stats/symbol_table.cc:623:3: note: Argument to free() is the address of a local stack variable, which is not memory allocated by malloc()
table.free(statName());
^ ~~~~~~~~~~
/b/f/w/source/common/stats/symbol_table.cc:736:5: error: Argument to free() is the address of the parameter 'stat_name', which is not memory allocated by malloc() [clang-analyzer-unix.Malloc,-warnings-as-errors]
symbol_table.free(stat_name);
^
/b/f/w/source/common/stats/symbol_table.cc:735:3: note: Calling 'StatNameList::iterate'
iterate([&symbol_table](StatName stat_name) -> bool {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/b/f/w/source/common/stats/symbol_table.cc:725:24: note: Assuming 'i' is < 'num_elements'
for (uint32_t i = 0; i < num_elements; ++i) {
^~~~~~~~~~~~~~~~
/b/f/w/source/common/stats/symbol_table.cc:725:3: note: Loop condition is true. Entering loop body
for (uint32_t i = 0; i < num_elements; ++i) {
^
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/b/f/w/source/common/stats/symbol_table.cc:736:5: note: Argument to free() is the address of the parameter 'stat_name', which is not memory allocated by malloc()
symbol_table.free(stat_name);
^ ~~~~~~~~~
```
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