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| author |   Ingo Molnar <mingo@elte.hu> | 2008-04-25 17:07:03 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-25 19:54:07 +0200 |
| commit | 00c6b2d5d7b2414bd46c620d6a8c37fa7a716f29 (patch) | |
| tree | 61395a1d6e1665e3f491a0601a6de237b61de194 /arch/x86/kernel/alternative.c | |
| parent | x86: clean up text_poke() (diff) | |
| download | linux-dev-00c6b2d5d7b2414bd46c620d6a8c37fa7a716f29.tar.xz linux-dev-00c6b2d5d7b2414bd46c620d6a8c37fa7a716f29.zip | |
x86: harden kernel code patching
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/alternative.c')
| -rw-r--r-- | arch/x86/kernel/alternative.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 60299f61843f..65c7857a90dd 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -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]); |