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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 4/4] arm64: kprobes: Use arch_populate_kprobe_blacklist()
Date: Wed, 13 Feb 2019 00:44:48 +0900	[thread overview]
Message-ID: <154998628802.21869.4041705065539411318.stgit@devbox> (raw)
In-Reply-To: <154998617300.21869.11457765723750331236.stgit@devbox>

Use arch_populate_kprobe_blacklist() instead of
arch_within_kprobe_blacklist() so that we can see the full
blacklisted symbols under the debugfs.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
  Changes in v3
   - Do not populate blacklist in __kprobe_text in
     arch_populate_kprobe_blacklist(), since it is already
     populated in populate_kprobe_blacklist().
   - Add exception entry text blacklist since those are rejected
     by in_exception_text().
---
 arch/arm64/kernel/probes/kprobes.c |   45 +++++++++++++++++++++---------------
 1 file changed, 26 insertions(+), 19 deletions(-)

diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c
index 194262fca5cd..37d913f33a89 100644
--- a/arch/arm64/kernel/probes/kprobes.c
+++ b/arch/arm64/kernel/probes/kprobes.c
@@ -465,26 +465,33 @@ kprobe_breakpoint_handler(struct pt_regs *regs, unsigned int esr)
 	return DBG_HOOK_HANDLED;
 }
 
-bool arch_within_kprobe_blacklist(unsigned long addr)
+int __init arch_populate_kprobe_blacklist(void)
 {
-	if ((addr >= (unsigned long)__kprobes_text_start &&
-	    addr < (unsigned long)__kprobes_text_end) ||
-	    (addr >= (unsigned long)__entry_text_start &&
-	    addr < (unsigned long)__entry_text_end) ||
-	    (addr >= (unsigned long)__idmap_text_start &&
-	    addr < (unsigned long)__idmap_text_end) ||
-	    (addr >= (unsigned long)__hyp_text_start &&
-	    addr < (unsigned long)__hyp_text_end) ||
-	    in_exception_text(addr))
-		return true;
-
-	if (!is_kernel_in_hyp_mode()) {
-		if ((addr >= (unsigned long)__hyp_idmap_text_start &&
-		    addr < (unsigned long)__hyp_idmap_text_end))
-			return true;
-	}
-
-	return false;
+	int ret;
+
+	ret = kprobe_add_area_blacklist((unsigned long)__entry_text_start,
+					(unsigned long)__entry_text_end);
+	if (ret)
+		return ret;
+	ret = kprobe_add_area_blacklist((unsigned long)__irqentry_text_start,
+					(unsigned long)__irqentry_text_end);
+	if (ret)
+		return ret;
+	ret = kprobe_add_area_blacklist((unsigned long)__exception_text_start,
+					(unsigned long)__exception_text_end);
+	if (ret)
+		return ret;
+	ret = kprobe_add_area_blacklist((unsigned long)__idmap_text_start,
+					(unsigned long)__idmap_text_end);
+	if (ret)
+		return ret;
+	ret = kprobe_add_area_blacklist((unsigned long)__hyp_text_start,
+					(unsigned long)__hyp_text_end);
+	if (ret || is_kernel_in_hyp_mode())
+		return ret;
+	ret = kprobe_add_area_blacklist((unsigned long)__hyp_idmap_text_start,
+					(unsigned long)__hyp_idmap_text_end);
+	return ret;
 }
 
 void __kprobes __used *trampoline_probe_handler(struct pt_regs *regs)


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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 4/4] arm64: kprobes: Use arch_populate_kprobe_blacklist()
Date: Wed, 13 Feb 2019 00:44:48 +0900	[thread overview]
Message-ID: <154998628802.21869.4041705065539411318.stgit@devbox> (raw)
In-Reply-To: <154998617300.21869.11457765723750331236.stgit@devbox>

Use arch_populate_kprobe_blacklist() instead of
arch_within_kprobe_blacklist() so that we can see the full
blacklisted symbols under the debugfs.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
  Changes in v3
   - Do not populate blacklist in __kprobe_text in
     arch_populate_kprobe_blacklist(), since it is already
     populated in populate_kprobe_blacklist().
   - Add exception entry text blacklist since those are rejected
     by in_exception_text().
---
 arch/arm64/kernel/probes/kprobes.c |   45 +++++++++++++++++++++---------------
 1 file changed, 26 insertions(+), 19 deletions(-)

diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c
index 194262fca5cd..37d913f33a89 100644
--- a/arch/arm64/kernel/probes/kprobes.c
+++ b/arch/arm64/kernel/probes/kprobes.c
@@ -465,26 +465,33 @@ kprobe_breakpoint_handler(struct pt_regs *regs, unsigned int esr)
 	return DBG_HOOK_HANDLED;
 }
 
-bool arch_within_kprobe_blacklist(unsigned long addr)
+int __init arch_populate_kprobe_blacklist(void)
 {
-	if ((addr >= (unsigned long)__kprobes_text_start &&
-	    addr < (unsigned long)__kprobes_text_end) ||
-	    (addr >= (unsigned long)__entry_text_start &&
-	    addr < (unsigned long)__entry_text_end) ||
-	    (addr >= (unsigned long)__idmap_text_start &&
-	    addr < (unsigned long)__idmap_text_end) ||
-	    (addr >= (unsigned long)__hyp_text_start &&
-	    addr < (unsigned long)__hyp_text_end) ||
-	    in_exception_text(addr))
-		return true;
-
-	if (!is_kernel_in_hyp_mode()) {
-		if ((addr >= (unsigned long)__hyp_idmap_text_start &&
-		    addr < (unsigned long)__hyp_idmap_text_end))
-			return true;
-	}
-
-	return false;
+	int ret;
+
+	ret = kprobe_add_area_blacklist((unsigned long)__entry_text_start,
+					(unsigned long)__entry_text_end);
+	if (ret)
+		return ret;
+	ret = kprobe_add_area_blacklist((unsigned long)__irqentry_text_start,
+					(unsigned long)__irqentry_text_end);
+	if (ret)
+		return ret;
+	ret = kprobe_add_area_blacklist((unsigned long)__exception_text_start,
+					(unsigned long)__exception_text_end);
+	if (ret)
+		return ret;
+	ret = kprobe_add_area_blacklist((unsigned long)__idmap_text_start,
+					(unsigned long)__idmap_text_end);
+	if (ret)
+		return ret;
+	ret = kprobe_add_area_blacklist((unsigned long)__hyp_text_start,
+					(unsigned long)__hyp_text_end);
+	if (ret || is_kernel_in_hyp_mode())
+		return ret;
+	ret = kprobe_add_area_blacklist((unsigned long)__hyp_idmap_text_start,
+					(unsigned long)__hyp_idmap_text_end);
+	return ret;
 }
 
 void __kprobes __used *trampoline_probe_handler(struct pt_regs *regs)


  parent reply	other threads:[~2019-02-12 15:45 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 ` [PATCH v3 3/4] arm64: kprobes: Move exception_text check in blacklist Masami Hiramatsu
2019-02-12 15:44   ` Masami Hiramatsu
2019-02-12 15:44 ` Masami Hiramatsu [this message]
2019-02-12 15:44   ` [PATCH v3 4/4] arm64: kprobes: Use arch_populate_kprobe_blacklist() 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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