From: Miaohe Lin <linmia...@huawei.com> commit c22ee5284cf58017fa8c6d21d8f8c68159b6faab upstream.
In VM_MAP_PUT_PAGES case, we should put pages and free array in vfree. But we missed to set area->nr_pages in vmap(). So we would fail to put pages in __vunmap() because area->nr_pages = 0. Link: https://lkml.kernel.org/r/20210107123541.39206-1-linmia...@huawei.com Fixes: b944afc9d64d ("mm: add a VM_MAP_PUT_PAGES flag for vmap") Signed-off-by: Shijie Luo <luoshij...@huawei.com> Signed-off-by: Miaohe Lin <linmia...@huawei.com> Reviewed-by: Uladzislau Rezki (Sony) <ure...@gmail.com> Cc: <sta...@vger.kernel.org> Signed-off-by: Andrew Morton <a...@linux-foundation.org> Signed-off-by: Linus Torvalds <torva...@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- mm/vmalloc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -2405,8 +2405,10 @@ void *vmap(struct page **pages, unsigned return NULL; } - if (flags & VM_MAP_PUT_PAGES) + if (flags & VM_MAP_PUT_PAGES) { area->pages = pages; + area->nr_pages = count; + } return area->addr; } EXPORT_SYMBOL(vmap);
