Messages in this thread |  | | Subject | Re: [PATCH] mm/kasan: Don't vfree() nonexistent vm_area. | From | Andrey Ryabinin <> | Date | Thu, 1 Feb 2018 23:22:55 +0300 |
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On 02/01/2018 10:57 PM, Matthew Wilcox wrote: > On Thu, Feb 01, 2018 at 07:33:49PM +0300, Andrey Ryabinin wrote: >> + case MEM_OFFLINE: { >> + struct vm_struct *vm; >> + >> + /* >> + * Only hot-added memory have vm_area. Freeing shadow >> + * mapped during boot would be tricky, so we'll just >> + * have to keep it. >> + */ >> + vm = find_vm_area((void *)shadow_start); >> + if (vm) >> + vfree((void *)shadow_start); >> + } > > This looks like a complicated way to spell 'is_vmalloc_addr' ... >
It's not. shadow_start is never vmalloc address.
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