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From: Jisheng Zhang <jszhang3@mail.ustc.edu.cn>
To: "Paul Walmsley" <paul.walmsley@sifive.com>,
	"Palmer Dabbelt" <palmer@dabbelt.com>,
	"Albert Ou" <aou@eecs.berkeley.edu>,
	"Andrey Ryabinin" <ryabinin.a.a@gmail.com>,
	"Alexander Potapenko" <glider@google.com>,
	"Andrey Konovalov" <andreyknvl@gmail.com>,
	"Dmitry Vyukov" <dvyukov@google.com>,
	" Björn Töpel" <bjorn@kernel.org>,
	"Alexei Starovoitov" <ast@kernel.org>,
	"Daniel Borkmann" <daniel@iogearbox.net>,
	"Andrii Nakryiko" <andrii@kernel.org>,
	"Martin KaFai Lau" <kafai@fb.com>,
	"Song Liu" <songliubraving@fb.com>, "Yonghong Song" <yhs@fb.com>,
	"John Fastabend" <john.fastabend@gmail.com>,
	"KP Singh" <kpsingh@kernel.org>,
	"Luke Nelson" <luke.r.nels@gmail.com>,
	"Xi Wang" <xi.wang@gmail.com>
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	kasan-dev@googlegroups.com, netdev@vger.kernel.org,
	bpf@vger.kernel.org
Subject: [PATCH 5/9] riscv: kprobes: Implement alloc_insn_page()
Date: Tue, 30 Mar 2021 02:24:21 +0800	[thread overview]
Message-ID: <20210330022421.0ee61d0d@xhacker> (raw)
In-Reply-To: <20210330022144.150edc6e@xhacker>

From: Jisheng Zhang <jszhang@kernel.org>

Allocate PAGE_KERNEL_READ_EXEC(read only, executable) page for kprobes
insn page. This is to prepare for STRICT_MODULE_RWX.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
 arch/riscv/kernel/probes/kprobes.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/riscv/kernel/probes/kprobes.c b/arch/riscv/kernel/probes/kprobes.c
index 7e2c78e2ca6b..8c1f7a30aeed 100644
--- a/arch/riscv/kernel/probes/kprobes.c
+++ b/arch/riscv/kernel/probes/kprobes.c
@@ -84,6 +84,14 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
 	return 0;
 }
 
+void *alloc_insn_page(void)
+{
+	return  __vmalloc_node_range(PAGE_SIZE, 1, VMALLOC_START, VMALLOC_END,
+				     GFP_KERNEL, PAGE_KERNEL_READ_EXEC,
+				     VM_FLUSH_RESET_PERMS, NUMA_NO_NODE,
+				     __builtin_return_address(0));
+}
+
 /* install breakpoint in text */
 void __kprobes arch_arm_kprobe(struct kprobe *p)
 {
-- 
2.31.0



WARNING: multiple messages have this Message-ID (diff)
From: Jisheng Zhang <jszhang3@mail.ustc.edu.cn>
To: "Paul Walmsley" <paul.walmsley@sifive.com>,
	"Palmer Dabbelt" <palmer@dabbelt.com>,
	"Albert Ou" <aou@eecs.berkeley.edu>,
	"Andrey Ryabinin" <ryabinin.a.a@gmail.com>,
	"Alexander Potapenko" <glider@google.com>,
	"Andrey Konovalov" <andreyknvl@gmail.com>,
	"Dmitry Vyukov" <dvyukov@google.com>,
	" Björn Töpel" <bjorn@kernel.org>,
	"Alexei Starovoitov" <ast@kernel.org>,
	"Daniel Borkmann" <daniel@iogearbox.net>,
	"Andrii Nakryiko" <andrii@kernel.org>,
	"Martin KaFai Lau" <kafai@fb.com>,
	"Song Liu" <songliubraving@fb.com>, "Yonghong Song" <yhs@fb.com>,
	"John Fastabend" <john.fastabend@gmail.com>,
	"KP Singh" <kpsingh@kernel.org>,
	"Luke Nelson" <luke.r.nels@gmail.com>,
	"Xi Wang" <xi.wang@gmail.com>
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	kasan-dev@googlegroups.com, netdev@vger.kernel.org,
	bpf@vger.kernel.org
Subject: [PATCH 5/9] riscv: kprobes: Implement alloc_insn_page()
Date: Tue, 30 Mar 2021 02:24:21 +0800	[thread overview]
Message-ID: <20210330022421.0ee61d0d@xhacker> (raw)
In-Reply-To: <20210330022144.150edc6e@xhacker>

From: Jisheng Zhang <jszhang@kernel.org>

Allocate PAGE_KERNEL_READ_EXEC(read only, executable) page for kprobes
insn page. This is to prepare for STRICT_MODULE_RWX.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
 arch/riscv/kernel/probes/kprobes.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/riscv/kernel/probes/kprobes.c b/arch/riscv/kernel/probes/kprobes.c
index 7e2c78e2ca6b..8c1f7a30aeed 100644
--- a/arch/riscv/kernel/probes/kprobes.c
+++ b/arch/riscv/kernel/probes/kprobes.c
@@ -84,6 +84,14 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
 	return 0;
 }
 
+void *alloc_insn_page(void)
+{
+	return  __vmalloc_node_range(PAGE_SIZE, 1, VMALLOC_START, VMALLOC_END,
+				     GFP_KERNEL, PAGE_KERNEL_READ_EXEC,
+				     VM_FLUSH_RESET_PERMS, NUMA_NO_NODE,
+				     __builtin_return_address(0));
+}
+
 /* install breakpoint in text */
 void __kprobes arch_arm_kprobe(struct kprobe *p)
 {
-- 
2.31.0



_______________________________________________
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  parent reply	other threads:[~2021-03-29 18:30 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-29 18:21 [PATCH 0/9] riscv: improve self-protection Jisheng Zhang
2021-03-29 18:21 ` Jisheng Zhang
2021-03-29 18:22 ` [PATCH 1/9] riscv: add __init section marker to some functions Jisheng Zhang
2021-03-29 18:22   ` Jisheng Zhang
2021-03-29 18:22 ` [PATCH 2/9] riscv: Mark some global variables __ro_after_init Jisheng Zhang
2021-03-29 18:22   ` Jisheng Zhang
2021-03-29 18:23 ` [PATCH 3/9] riscv: Constify sys_call_table Jisheng Zhang
2021-03-29 18:23   ` Jisheng Zhang
2021-03-29 18:23 ` [PATCH 4/9] riscv: Constify sbi_ipi_ops Jisheng Zhang
2021-03-29 18:23   ` Jisheng Zhang
2021-03-29 18:24 ` Jisheng Zhang [this message]
2021-03-29 18:24   ` [PATCH 5/9] riscv: kprobes: Implement alloc_insn_page() Jisheng Zhang
2021-03-29 18:24 ` [PATCH 6/9] riscv: bpf: Move bpf_jit_alloc_exec() and bpf_jit_free_exec() to core Jisheng Zhang
2021-03-29 18:24   ` Jisheng Zhang
2021-03-29 20:41   ` Luke Nelson
2021-03-29 20:41     ` Luke Nelson
2021-03-29 18:25 ` [PATCH 7/9] riscv: bpf: Avoid breaking W^X Jisheng Zhang
2021-03-29 18:25   ` Jisheng Zhang
2021-03-30 16:39   ` kernel test robot
2021-06-11 14:10   ` Andreas Schwab
2021-06-11 14:10     ` Andreas Schwab
2021-06-11 16:23     ` Jisheng Zhang
2021-06-11 16:23       ` Jisheng Zhang
2021-06-11 16:41       ` Andreas Schwab
2021-06-11 16:41         ` Andreas Schwab
2021-06-13 17:05         ` Jisheng Zhang
2021-06-13 17:05           ` Jisheng Zhang
2021-06-13 19:50           ` Andreas Schwab
2021-06-13 19:50             ` Andreas Schwab
2021-06-14 16:49             ` [PATCH] riscv: Ensure BPF_JIT_REGION_START aligned with PMD size Jisheng Zhang
2021-06-14 16:49               ` Jisheng Zhang
2021-06-15 12:29               ` Daniel Borkmann
2021-06-15 12:29                 ` Daniel Borkmann
2021-06-15 18:54               ` Alex Ghiti
2021-06-15 18:54                 ` Alex Ghiti
2021-06-16  0:03                 ` Jisheng Zhang
2021-06-16  0:03                   ` Jisheng Zhang
2021-06-17  7:23                   ` Alex Ghiti
2021-06-17  7:23                     ` Alex Ghiti
2021-06-17 17:17                     ` Jisheng Zhang
2021-06-17 17:17                       ` Jisheng Zhang
2021-06-17  7:30                   ` Palmer Dabbelt
2021-06-17  7:30                     ` Palmer Dabbelt
2021-06-17  8:09                     ` Alex Ghiti
2021-06-17  8:09                       ` Alex Ghiti
2021-06-17 14:18                       ` Alex Ghiti
2021-06-17 14:18                         ` Alex Ghiti
2021-06-17 17:27                         ` Jisheng Zhang
2021-06-17 17:27                           ` Jisheng Zhang
2021-06-17 17:46                           ` Jisheng Zhang
2021-06-17 17:46                             ` Jisheng Zhang
2021-06-17 18:10                             ` Jisheng Zhang
2021-06-17 18:10                               ` Jisheng Zhang
2021-06-17 18:15                               ` [PATCH v2] " Jisheng Zhang
2021-06-17 18:15                                 ` Jisheng Zhang
2021-06-18  6:48                                 ` Alex Ghiti
2021-06-18  6:48                                   ` Alex Ghiti
2021-03-29 18:25 ` [PATCH 8/9] riscv: module: Create module allocations without exec permissions Jisheng Zhang
2021-03-29 18:25   ` Jisheng Zhang
2021-03-29 18:26 ` [PATCH 9/9] riscv: Set ARCH_HAS_STRICT_MODULE_RWX if MMU Jisheng Zhang
2021-03-29 18:26   ` Jisheng Zhang
2021-04-23  1:48 ` [PATCH 0/9] riscv: improve self-protection Palmer Dabbelt
2021-04-23  1:48   ` Palmer Dabbelt

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