Messages in this thread Patch in this message | | | From | Masami Hiramatsu <> | Subject | [PATCH v3 3/4] arm64: kprobes: Move exception_text check in blacklist | Date | Wed, 13 Feb 2019 00:44:19 +0900 |
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Move exception/irqentry text address check in blacklist, since those are symbol based rejection.
If we prohibit probing on the symbols in exception_text, those should be blacklisted.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> --- arch/arm64/kernel/probes/kprobes.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c index bd06b4b13fa9..194262fca5cd 100644 --- a/arch/arm64/kernel/probes/kprobes.c +++ b/arch/arm64/kernel/probes/kprobes.c @@ -98,9 +98,6 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) /* copy instruction */ p->opcode = le32_to_cpu(*p->addr); - if (in_exception_text(probe_addr)) - return -EINVAL; - if (search_exception_tables(probe_addr)) return -EINVAL; @@ -477,7 +474,8 @@ bool arch_within_kprobe_blacklist(unsigned long addr) (addr >= (unsigned long)__idmap_text_start && addr < (unsigned long)__idmap_text_end) || (addr >= (unsigned long)__hyp_text_start && - addr < (unsigned long)__hyp_text_end)) + addr < (unsigned long)__hyp_text_end) || + in_exception_text(addr)) return true; if (!is_kernel_in_hyp_mode()) {
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