diff options
author | Don Morris <don.morris@hp.com> | 2012-03-15 11:07:30 -0700 |
---|---|---|
committer | Varun Wadekar <vwadekar@nvidia.com> | 2012-04-18 19:13:10 +0530 |
commit | db10f2177800d6b428f1969c7b9073d545f51049 (patch) | |
tree | 5419a25a1d9837628226fbe87dc5029e0a5e4415 | |
parent | e2cb1727fbde88b66d0f7042ab1d9cb7d3c62531 (diff) |
iop-adma: Corrected array overflow in RAID6 Xscale(R) test.
Bug: cppcheck reported overflow in array assignment (for loop walks
0 to IOP_ADMA_NUM_SRC_TEST+2, array size is IOP_ADMA_NUM_SRC_TEST).
Reported as: https://bugzilla.kernel.org/show_bug.cgi?id=42677
Test code pq_src array was grown by two elements to correspond with actual
usage (IOP_ADMA_NUM_SRC_TEST+2), stack consumption was kept constant by
modifying the pq_dest two element array which is only used when pq_src
is referenced up to IOP_ADMA_NUM_SRC_TEST elements into the address
of the new last two elements of the pq_src array. This is presumed to
be the original intent but would be reliant on compilers always having
pq_dest contiguous with the final element of pq_src.
Note: This is a re-send of a request for review from two weeks ago.
Looking for review (or shootdown), adding LKML to list for a wider
audience. Thanks.
Updated per review comments of Sergei Shtylyov <sshtylyov@mvista.com>
Signed-off-by: Don Morris <don.morris@hp.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
-rw-r--r-- | drivers/dma/iop-adma.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c index da6c4c2c066a..79e3eba29702 100644 --- a/drivers/dma/iop-adma.c +++ b/drivers/dma/iop-adma.c @@ -1252,8 +1252,8 @@ iop_adma_pq_zero_sum_self_test(struct iop_adma_device *device) struct page **pq_hw = &pq[IOP_ADMA_NUM_SRC_TEST+2]; /* address conversion buffers (dma_map / page_address) */ void *pq_sw[IOP_ADMA_NUM_SRC_TEST+2]; - dma_addr_t pq_src[IOP_ADMA_NUM_SRC_TEST]; - dma_addr_t pq_dest[2]; + dma_addr_t pq_src[IOP_ADMA_NUM_SRC_TEST+2]; + dma_addr_t *pq_dest = &pq_src[IOP_ADMA_NUM_SRC_TEST]; int i; struct dma_async_tx_descriptor *tx; |