lib/vector/vlib: Fix possible null pointer dereference #4638
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In the function `Vect_cat_list_to_array`, as part of the execution, if list turns out to not contain any numbers, `cats` internal variable is not changed from NULL. Without checking if `cats` is NULL or not, qsort or first elemnt of it is accessed, which can lead to null pointer dereference. To fix that issue, only access cats if it's not NULL. This issue was found using cppcheck tool. Signed-off-by: Mohan Yelugoti <[email protected]>
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Documented each supression issue with comments to distinguish between false positives and true positives awaiting resolution. For the false positives supressions, appropriate information is provided on why those were considered as false positive. True positives will be removed from the suppression file once their corresponding fixes(OSGeo#4702, OSGeo#4638, OSGeo#4500, OSGeo#4499) are merged. Run: `cppcheck --suppressions-list=.cppcheck-supressions <path>` Signed-off-by: Mohan Yelugoti <[email protected]>
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Documented each suppression issue with comments to distinguish between false positives and true positives awaiting resolution. For the false positives suppressions, appropriate information is provided on why those were considered as false positive. True positives will be removed from the suppression file once their corresponding fixes(OSGeo#4702, OSGeo#4638, OSGeo#4500, OSGeo#4499) are merged. Run: `cppcheck --suppressions-list=.cppcheck-suppressions <path>` Signed-off-by: Mohan Yelugoti <[email protected]>
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In the function
Vect_cat_list_to_array, as part of the execution, if list turns out to not contain any numbers,catsinternal variable is not changed from NULL. Without checking ifcatsis NULL or not, qsort or first elemnt of it is accessed, which can lead to null pointer dereference.To fix that issue, only access cats if it's not NULL.
This issue was found using cppcheck tool.