提交 cda1c5af 编写于 作者: R Roel Kluin 提交者: Linus Torvalds

cryptocop: fix assertion in create_output_descriptors()

size_t desc_len cannot be less than 0, test before the subtraction.
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 ba875ba6
......@@ -628,9 +628,9 @@ static int create_output_descriptors(struct cryptocop_operation *operation, int
cdesc->dma_descr->buf = (char*)virt_to_phys(operation->tfrm_op.indata[*iniov_ix].iov_base + *iniov_offset);
cdesc->dma_descr->after = cdesc->dma_descr->buf + dlength;
assert(desc_len >= dlength);
desc_len -= dlength;
*iniov_offset += dlength;
assert(desc_len >= 0);
if (*iniov_offset >= operation->tfrm_op.indata[*iniov_ix].iov_len) {
*iniov_offset = 0;
++(*iniov_ix);
......
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