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| author | Christoph Hellwig <hch@lst.de> | 2020-06-26 05:30:43 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-26 09:27:38 +0200 |
| commit | 10d5e97c1bf816facbc7c431c6caf47ee35fc1ed (patch) | |
| tree | 02dc287ce6fbfabe7d1a65c64c76ab58cecbafe7 | |
| parent | x86/hyperv: allocate the hypercall page with only read and execute bits (diff) | |
| download | linux-10d5e97c1bf816facbc7c431c6caf47ee35fc1ed.tar.xz linux-10d5e97c1bf816facbc7c431c6caf47ee35fc1ed.zip | |
arm64: use PAGE_KERNEL_ROX directly in alloc_insn_page
Use PAGE_KERNEL_ROX directly instead of allocating RWX and setting the
page read-only just after the allocation.
Link: http://lkml.kernel.org/r/20200618064307.32739-3-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/arm64/kernel/probes/kprobes.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c index d1c95dcf1d78..cbe49cd117cf 100644 --- a/arch/arm64/kernel/probes/kprobes.c +++ b/arch/arm64/kernel/probes/kprobes.c @@ -120,15 +120,9 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) void *alloc_insn_page(void) { - void *page; - - page = vmalloc_exec(PAGE_SIZE); - if (page) { - set_memory_ro((unsigned long)page, 1); - set_vm_flush_reset_perms(page); - } - - return page; + return __vmalloc_node_range(PAGE_SIZE, 1, VMALLOC_START, VMALLOC_END, + GFP_KERNEL, PAGE_KERNEL_ROX, VM_FLUSH_RESET_PERMS, + NUMA_NO_NODE, __func__); } /* arm kprobe: install breakpoint in text */ |