bug report for linux-6.14/tools/testing/selftests/mm/pagemap_ioctl.c

[David Binderman]

Hello there,

Static analyser cppcheck says:

> linux-6.14/tools/testing/selftests/mm/pagemap_ioctl.c:1061:11: style: int result is assigned to long long variable. If the variable is long long to avoid loss of information, then you have loss of information. [truncLongCastAssignment]
> linux-6.14/tools/testing/selftests/mm/pagemap_ioctl.c:1510:11: style: int result is assigned to long long variable. If the variable is long long to avoid loss of information, then you have loss of information. [truncLongCastAssignment]
> linux-6.14/tools/testing/selftests/mm/pagemap_ioctl.c:1523:11: style: int result is assigned to long long variable. If the variable is long long to avoid loss of information, then you have loss of information. [truncLongCastAssignment]
> linux-6.14/tools/testing/selftests/mm/pagemap_ioctl.c:247:11: style: int result is assigned to long long variable. If the variable is long long to avoid loss of information, then you have loss of information. [truncLongCastAssignment]
> linux-6.14/tools/testing/selftests/mm/pagemap_ioctl.c:435:11: style: int result is assigned to long long variable. If the variable is long long to avoid loss of information, then you have loss of information. [truncLongCastAssignment]
> linux-6.14/tools/testing/selftests/mm/pagemap_ioctl.c:490:11: style: int result is assigned to long long variable. If the variable is long long to avoid loss of information, then you have loss of information. [truncLongCastAssignment]

The source code of the first one is

    mem_size = 10 * page_size;

Maybe better code:

    mem_size = 10ULL * page_size;

Regards

David Binderman