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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2019-02-12 16:43:22 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2019-03-19 13:42:58 +0100 |
| commit | a872fc8bf0304fd56347e94468f07d7e82c679ea (patch) | |
| tree | 5c9c5b4d98f865ff32452514cfe109f5a09a4b60 /arch | |
| parent | Linux 5.1-rc1 (diff) | |
| download | linux-a872fc8bf0304fd56347e94468f07d7e82c679ea.tar.xz linux-a872fc8bf0304fd56347e94468f07d7e82c679ea.zip | |
arm64: kprobes: Move extable address check into arch_prepare_kprobe()
Move extable address check into arch_prepare_kprobe() from
arch_within_kprobe_blacklist().
The blacklist is exposed via debugfs as a list of symbols.
The extable entries are smaller, so must be filtered out
by arch_prepare_kprobe().
Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: James Morse <james.morse@arm.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/kernel/probes/kprobes.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c index 7fb6f3aa5ceb..16bc3b2e9351 100644 --- a/arch/arm64/kernel/probes/kprobes.c +++ b/arch/arm64/kernel/probes/kprobes.c @@ -102,6 +102,10 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) if (in_exception_text(probe_addr)) return -EINVAL; + + if (search_exception_tables(probe_addr)) + return -EINVAL; + if (probe_addr >= (unsigned long) __start_rodata && probe_addr <= (unsigned long) __end_rodata) return -EINVAL; @@ -485,8 +489,7 @@ 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) || - !!search_exception_tables(addr)) + addr < (unsigned long)__hyp_text_end)) return true; if (!is_kernel_in_hyp_mode()) { |