On Thu, May 23, 2019 at 11:22:52AM +0100, Ard Biesheuvel wrote: > Wire up the code introduced in v5.2 to manage the permissions > of executable vmalloc regions (and their linear aliases) more > strictly. > > One of the things that came up in the internal discussion is > whether non-x86 architectures have any benefit at all from the > lazy vunmap feature, and whether it would perhaps be better to > implement eager vunmap instead. > > Cc: Nadav Amit <[email protected]> > Cc: Rick Edgecombe <[email protected]> > Cc: Peter Zijlstra <[email protected]> > Cc: Andrew Morton <[email protected]> > Cc: Will Deacon <[email protected]> > Cc: Masami Hiramatsu <[email protected]> > Cc: James Morse <[email protected]> > > Ard Biesheuvel (4): > arm64: module: create module allocations without exec permissions > arm64/mm: wire up CONFIG_ARCH_HAS_SET_DIRECT_MAP > arm64/kprobes: set VM_FLUSH_RESET_PERMS on kprobe instruction pages > arm64: bpf: do not allocate executable memory > > arch/arm64/Kconfig | 1 + > arch/arm64/include/asm/cacheflush.h | 3 ++ > arch/arm64/kernel/module.c | 4 +- > arch/arm64/kernel/probes/kprobes.c | 4 +- > arch/arm64/mm/pageattr.c | 48 ++++++++++++++++---- > arch/arm64/net/bpf_jit_comp.c | 2 +- > mm/vmalloc.c | 11 ----- > 7 files changed, 50 insertions(+), 23 deletions(-)
Thanks, this all looks good to me. I can get pick this up for 5.2 if Rick's fixes [1] land soon enough. Cheers, Will [1] https://lore.kernel.org/lkml/[email protected]/T/#u
