Page MenuHomeFreeBSD

sys: Disable -Walloc-size-larger-than for GCC 9+
ClosedPublic

Authored by jhb on Nov 13 2023, 10:30 PM.
Tags
None
Referenced Files
Unknown Object (File)
Mon, Oct 13, 2:15 AM
Unknown Object (File)
Mon, Oct 13, 2:15 AM
Unknown Object (File)
Mon, Oct 13, 2:14 AM
Unknown Object (File)
Sun, Oct 12, 2:25 PM
Unknown Object (File)
Wed, Sep 24, 6:12 AM
Unknown Object (File)
Wed, Sep 24, 3:09 AM
Unknown Object (File)
Sep 9 2025, 3:25 PM
Unknown Object (File)
Sep 7 2025, 10:42 AM
Subscribers

Details

Summary

By default this warns about sizes larger than PTRDIFF_MAX passed to
malloc (rather than SIZE_MAX). This doesn't trigger
deterministically, but it does trigger for kmalloc() of struct_size()
in iwlwifi's iwl_configure_rxq even when struct_size() is changed to
use PTRDIFF_MAX. NB: struct_size() in Linux caps the size at
SIZE_MAX, not PTRDIFF_MAX via size_mul().

Diff Detail

Repository
rG FreeBSD src repository
Lint
Lint Not Applicable
Unit
Tests Not Applicable