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(-) -- 2.17.1
