On Wed, Jun 12, 2019 at 01:43:20PM +0200, Andrey Konovalov wrote: > From: Catalin Marinas <catalin.marinas@xxxxxxx> > > It is not desirable to relax the ABI to allow tagged user addresses into > the kernel indiscriminately. This patch introduces a prctl() interface > for enabling or disabling the tagged ABI with a global sysctl control > for preventing applications from enabling the relaxed ABI (meant for > testing user-space prctl() return error checking without reconfiguring > the kernel). The ABI properties are inherited by threads of the same > application and fork()'ed children but cleared on execve(). > > The PR_SET_TAGGED_ADDR_CTRL will be expanded in the future to handle > MTE-specific settings like imprecise vs precise exceptions. > > Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx> You need your signed-off-by here since you are contributing it. And thanks for adding the comment to the TIF definition. -- Catalin
