Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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: kernel test robot <lkp@intel.com>
Fixes: d8ac7b85236b ("crypto: hisilicon - fix large sgl memory...")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
+2
-1
+2
-1
drivers/crypto/hisilicon/sgl.c
+2
-1
drivers/crypto/hisilicon/sgl.c
···
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sgl_size = sizeof(struct acc_hw_sge) * sge_nr +
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sizeof(struct hisi_acc_hw_sgl);
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-
block_size = PAGE_SIZE * (1 << (MAX_ORDER - 1));
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+
block_size = 1 << (PAGE_SHIFT + MAX_ORDER <= 32 ?
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+
PAGE_SHIFT + MAX_ORDER - 1 : 31);
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sgl_num_per_block = block_size / sgl_size;
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block_num = count / sgl_num_per_block;
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remain_sgl = count % sgl_num_per_block;