diff options
| -rw-r--r-- | arch/arm64/include/asm/ktext.h | 1 | ||||
| -rw-r--r-- | arch/arm64/kernel/patching.c | 2 | ||||
| -rw-r--r-- | arch/arm64/mm/ktext.c | 21 |
3 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/ktext.h b/arch/arm64/include/asm/ktext.h index 289e11289c06..def0c894ed46 100644 --- a/arch/arm64/include/asm/ktext.h +++ b/arch/arm64/include/asm/ktext.h @@ -10,6 +10,7 @@ #ifdef CONFIG_REPLICATE_KTEXT void ktext_replication_init(void); +void ktext_replication_write(void *addr, void *data, size_t size); void __kprobes ktext_replication_patch(u32 *tp, __le32 insn); void ktext_replication_patch_alternative(__le32 *src, int nr_inst); diff --git a/arch/arm64/kernel/patching.c b/arch/arm64/kernel/patching.c index 627fff6ddda2..b670e159a766 100644 --- a/arch/arm64/kernel/patching.c +++ b/arch/arm64/kernel/patching.c @@ -103,6 +103,8 @@ noinstr int aarch64_insn_write_literal_u64(void *addr, u64 val) patch_unmap(FIX_TEXT_POKE0); raw_spin_unlock_irqrestore(&patch_lock, flags); + ktext_replication_write(addr, &val, sizeof(val)); + return ret; } diff --git a/arch/arm64/mm/ktext.c b/arch/arm64/mm/ktext.c index 04b5ceddae4e..0017e7760d36 100644 --- a/arch/arm64/mm/ktext.c +++ b/arch/arm64/mm/ktext.c @@ -17,6 +17,27 @@ static void *kernel_texts[MAX_NUMNODES]; +noinstr void ktext_replication_write(void *addr, void *data, size_t size) +{ + unsigned long offset; + void *ptr; + int nid; + + if (!is_kernel_text((unsigned long)addr)) + return; + + offset = (unsigned long)addr - (unsigned long)_stext; + + for_each_node(nid) { + if (!kernel_texts[nid] || !nid) + continue; + + ptr = kernel_texts[nid] + offset; + + memcpy(ptr, data, size); + } +} + void __kprobes ktext_replication_patch(u32 *tp, __le32 insn) { unsigned long offset; |