Commit c61e5644 authored by Herbert Xu's avatar Herbert Xu

crypto: hisilicon - Cap block size at 2^31

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: default avatarkernel test robot <lkp@intel.com>
Fixes: d8ac7b85 ("crypto: hisilicon - fix large sgl memory...")
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 7cf81954
...@@ -66,7 +66,8 @@ struct hisi_acc_sgl_pool *hisi_acc_create_sgl_pool(struct device *dev, ...@@ -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 + sgl_size = sizeof(struct acc_hw_sge) * sge_nr +
sizeof(struct hisi_acc_hw_sgl); 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; sgl_num_per_block = block_size / sgl_size;
block_num = count / sgl_num_per_block; block_num = count / sgl_num_per_block;
remain_sgl = count % sgl_num_per_block; remain_sgl = count % sgl_num_per_block;
......
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