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Commit 00c6b2d5 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

x86: harden kernel code patching 



Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent b7b66baa

arch/x86/kernel/alternative.c

+1 −0
Original line number Diff line number Diff line
@@ -519,6 +519,7 @@ void *__kprobes text_poke(void *addr, const void *opcode, size_t len) 
		pages[1] = vmalloc_to_page(addr + PAGE_SIZE);

	} else {

		pages[0] = virt_to_page(addr);

		WARN_ON(!PageReserved(pages[0]));

		pages[1] = virt_to_page(addr + PAGE_SIZE);

	}

	BUG_ON(!pages[0]);