From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> [ Upstream commit c61e5644c69775ae9d54b86018fca238aca64a9b ] The function hisi_acc_create_sg_pool may allocate a block of memory of size PAGE_SIZE * 2^(MAX_ORDER - 1). This value may exceed 2^31 on ia64, which would overflow the u32. This patch caps it at 2^31. Reported-by: kernel test robot <lkp@xxxxxxxxx> Fixes: d8ac7b85236b ("crypto: hisilicon - fix large sgl memory...") Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/crypto/hisilicon/sgl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/hisilicon/sgl.c b/drivers/crypto/hisilicon/sgl.c index 0e8c7e324fb46..725a739800b0a 100644 --- a/drivers/crypto/hisilicon/sgl.c +++ b/drivers/crypto/hisilicon/sgl.c @@ -66,7 +66,8 @@ struct hisi_acc_sgl_pool *hisi_acc_create_sgl_pool(struct device *dev, sgl_size = sizeof(struct acc_hw_sge) * sge_nr + sizeof(struct hisi_acc_hw_sgl); - block_size = PAGE_SIZE * (1 << (MAX_ORDER - 1)); + block_size = 1 << (PAGE_SHIFT + MAX_ORDER <= 32 ? + PAGE_SHIFT + MAX_ORDER - 1 : 31); sgl_num_per_block = block_size / sgl_size; block_num = count / sgl_num_per_block; remain_sgl = count % sgl_num_per_block; -- 2.25.1