dmaengine: fsl_raid: zero CF descriptor pool allocations

The compound frame descriptors and embedded CDBs are allocated from the
cf_desc_pool with dma_pool_alloc(), which does not zero the memory. Only
cdb32, the gfm coefficients and the frame address/length fields are
programmed; the dpi_dest_spec/dpi_src_spec fields in the CDBs and the
rbro32 field of each frame are left uninitialized. The hardware reads
the whole block (frame 0 length is sizeof(struct fsl_re_xor_cdb) or
sizeof(struct fsl_re_pq_cdb)), so uninitialized heap contents are
exposed to the device on each new descriptor.

Use dma_pool_zalloc() in both fsl_re_chan_alloc_desc() and
fsl_re_alloc_chan_resources() so the descriptor and CDB memory is
zeroed before it is handed to the RAID engine.

Fixes: ad80da658bbc ("dmaengine: Driver support for FSL RaidEngine device.")
Assisted-by: opencode:deepseek-v4-flash-free
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260820031654.28450-1-rosenp@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

0 files changed, 0 insertions, 0 deletions