| Message ID | 20210401002724.794b3bc4@xhacker (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | riscv: improve self-protection | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Not a local patch |
On Wed, Mar 31, 2021 at 10:02 PM Jisheng Zhang <jszhang3@mail.ustc.edu.cn> wrote: > > 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> Looks good to me. Reviewed-by: Anup Patel <anup@brainfault.org> Regards, Anup > --- > 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 > > > > _______________________________________________ > linux-riscv mailing list > linux-riscv@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-riscv
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) {