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arm64: use PAGE_KERNEL_ROX directly in alloc_insn_page

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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/[email protected]
Signed-off-by: Christoph Hellwig <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Dexuan Cui <[email protected]>
Cc: Jessica Yu <[email protected]>
Cc: Vitaly Kuznetsov <[email protected]>
Cc: Wei Liu <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Hellwig authored and Linus Torvalds committed 2020-06-26 00:27:38 -07:00
1 parent 800e26b813
commit 10d5e97c1b
1 file changed
+3 -9
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arch/arm64/kernel/probes/kprobes.c
+3 -9
View File
@@ -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 */