| From | Johannes Thumshirn <> | Subject | Re: [PATCH 07/32] mm: Bring back vmalloc_exec | Date | Wed, 10 May 2023 15:05:48 +0000 |
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On 09.05.23 18:56, Kent Overstreet wrote: > +/** > + * vmalloc_exec - allocate virtually contiguous, executable memory > + * @size: allocation size > + * > + * Kernel-internal function to allocate enough pages to cover @size > + * the page level allocator and map them into contiguous and > + * executable kernel virtual space. > + * > + * For tight control over page level allocator and protection flags > + * use __vmalloc() instead. > + * > + * Return: pointer to the allocated memory or %NULL on error > + */ > +void *vmalloc_exec(unsigned long size, gfp_t gfp_mask) > +{ > + return __vmalloc_node_range(size, 1, VMALLOC_START, VMALLOC_END, > + gfp_mask, PAGE_KERNEL_EXEC, VM_FLUSH_RESET_PERMS, > + NUMA_NO_NODE, __builtin_return_address(0)); > +} > +EXPORT_SYMBOL_GPL(vmalloc_exec);
Uh W+X memory reagions. The 90s called, they want their shellcode back.
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