On Thu, 1 Jul 2021 11:17:08 +0000 (UTC), Christophe Leroy wrote: > The powerpc kernel is not prepared to handle exec faults from kernel. > Especially, the function is_exec_fault() will return 'false' when an > exec fault is taken by kernel, because the check is based on reading > current->thread.regs->trap which contains the trap from user. > > For instance, when provoking a LKDTM EXEC_USERSPACE test, > current->thread.regs->trap is set to SYSCALL trap (0xc00), and > the fault taken by the kernel is not seen as an exec fault by > set_access_flags_filter(). > > [...]
Applied to powerpc/fixes. [1/1] powerpc/mm: Fix lockup on kernel exec fault https://git.kernel.org/powerpc/c/cd5d5e602f502895e47e18cd46804d6d7014e65c cheers