| Message ID | 20210401002900.470f3413@xhacker (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | riscv: improve self-protection | expand |
On Wed, Mar 31, 2021 at 10:04 PM Jisheng Zhang <jszhang3@mail.ustc.edu.cn> wrote: > > From: Jisheng Zhang <jszhang@kernel.org> > > The core code manages the executable permissions of code regions of > modules explicitly, it is not necessary to create the module vmalloc > regions with RWX permissions. Create them with RW- permissions instead. > > Signed-off-by: Jisheng Zhang <jszhang@kernel.org> Looks good to me. Reviewed-by: Anup Patel <anup@brainfault.org> Regards, Anup > --- > arch/riscv/kernel/module.c | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > > diff --git a/arch/riscv/kernel/module.c b/arch/riscv/kernel/module.c > index 104fba889cf7..e89367bba7c9 100644 > --- a/arch/riscv/kernel/module.c > +++ b/arch/riscv/kernel/module.c > @@ -407,14 +407,20 @@ int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, > return 0; > } > > -#if defined(CONFIG_MMU) && defined(CONFIG_64BIT) > +#ifdef CONFIG_MMU > + > +#ifdef CONFIG_64BIT > #define VMALLOC_MODULE_START \ > max(PFN_ALIGN((unsigned long)&_end - SZ_2G), VMALLOC_START) > +#else > +#define VMALLOC_MODULE_START VMALLOC_START > +#endif > + > void *module_alloc(unsigned long size) > { > return __vmalloc_node_range(size, 1, VMALLOC_MODULE_START, > VMALLOC_END, GFP_KERNEL, > - PAGE_KERNEL_EXEC, 0, NUMA_NO_NODE, > + PAGE_KERNEL, 0, NUMA_NO_NODE, > __builtin_return_address(0)); > } > #endif > -- > 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/module.c b/arch/riscv/kernel/module.c index 104fba889cf7..e89367bba7c9 100644 --- a/arch/riscv/kernel/module.c +++ b/arch/riscv/kernel/module.c @@ -407,14 +407,20 @@ int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, return 0; } -#if defined(CONFIG_MMU) && defined(CONFIG_64BIT) +#ifdef CONFIG_MMU + +#ifdef CONFIG_64BIT #define VMALLOC_MODULE_START \ max(PFN_ALIGN((unsigned long)&_end - SZ_2G), VMALLOC_START) +#else +#define VMALLOC_MODULE_START VMALLOC_START +#endif + void *module_alloc(unsigned long size) { return __vmalloc_node_range(size, 1, VMALLOC_MODULE_START, VMALLOC_END, GFP_KERNEL, - PAGE_KERNEL_EXEC, 0, NUMA_NO_NODE, + PAGE_KERNEL, 0, NUMA_NO_NODE, __builtin_return_address(0)); } #endif