On Mon, 2019-10-21 at 14:23:09 UTC, Geert Uytterhoeven wrote:
> "powerpc_security_features" is "unsigned long", i.e. 32-bit or 64-bit,
> depending on the platform (PPC_FSL_BOOK3E or PPC_BOOK3S_64). Hence
> casting its address to "u64 *", and calling debugfs_create_x64() is
> wrong, and leaks
"powerpc_security_features" is "unsigned long", i.e. 32-bit or 64-bit,
depending on the platform (PPC_FSL_BOOK3E or PPC_BOOK3S_64). Hence
casting its address to "u64 *", and calling debugfs_create_x64() is
wrong, and leaks 32-bit of nearby data to userspace on 32-bit platforms.
While all
