From: Masami Hiramatsu <mhiramat@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>
Cc: Pratyush Anand <panand@redhat.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
James Morse <james.morse@arm.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
linux-arm-kernel@lists.infradead.org,
"David A . Long" <dave.long@linaro.org>
Subject: [PATCH v3 3/4] arm64: kprobes: Move exception_text check in blacklist
Date: Wed, 13 Feb 2019 00:44:19 +0900 [thread overview]
Message-ID: <154998625948.21869.8505204111913908807.stgit@devbox> (raw)
In-Reply-To: <154998617300.21869.11457765723750331236.stgit@devbox>
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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WARNING: multiple messages have this Message-ID (diff)
From: Masami Hiramatsu <mhiramat@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
Pratyush Anand <panand@redhat.com>,
"David A . Long" <dave.long@linaro.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel <linux-kernel@vger.kernel.org>,
James Morse <james.morse@arm.com>
Subject: [PATCH v3 3/4] arm64: kprobes: Move exception_text check in blacklist
Date: Wed, 13 Feb 2019 00:44:19 +0900 [thread overview]
Message-ID: <154998625948.21869.8505204111913908807.stgit@devbox> (raw)
In-Reply-To: <154998617300.21869.11457765723750331236.stgit@devbox>
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()) {
next prev parent reply other threads:[~2019-02-12 15:44 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-12 15:42 [PATCH v3 0/4] arm64: kprobes: Update blacklist checking on arm64 Masami Hiramatsu
2019-02-12 15:42 ` Masami Hiramatsu
2019-02-12 15:43 ` [PATCH v3 1/4] arm64: kprobes: Move extable address check into arch_prepare_kprobe() Masami Hiramatsu
2019-02-12 15:43 ` Masami Hiramatsu
2019-02-12 15:43 ` [PATCH v3 2/4] arm64: kprobes: Remove unneeded RODATA check Masami Hiramatsu
2019-02-12 15:43 ` Masami Hiramatsu
2019-02-12 15:44 ` Masami Hiramatsu [this message]
2019-02-12 15:44 ` [PATCH v3 3/4] arm64: kprobes: Move exception_text check in blacklist Masami Hiramatsu
2019-02-12 15:44 ` [PATCH v3 4/4] arm64: kprobes: Use arch_populate_kprobe_blacklist() Masami Hiramatsu
2019-02-12 15:44 ` Masami Hiramatsu
2019-02-14 15:55 ` Will Deacon
2019-02-14 15:55 ` Will Deacon
2019-02-15 15:00 ` Masami Hiramatsu
2019-02-15 15:00 ` Masami Hiramatsu
2019-02-15 17:46 ` [PATCH v3 0/4] arm64: kprobes: Update blacklist checking on arm64 Catalin Marinas
2019-02-15 17:46 ` Catalin Marinas
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