Sagi Grimberg 0f632bc483 IB/isert: Fix unaligned immediate-data handling ... [ Upstream commit 0b089c1ef7 ] Currently we allocate rx buffers in a single contiguous buffers for headers (iser and iscsi) and data trailer. This means that most likely the data starting offset is aligned to 76 bytes (size of both headers). This worked fine for years, but at some point this broke, resulting in data corruptions in isert when a command comes with immediate data and the underlying backend device assumes 512 bytes buffer alignment. We assume a hard-requirement for all direct I/O buffers to be 512 bytes aligned. To fix this, we should avoid passing unaligned buffers for I/O. Instead, we allocate our recv buffers with some extra space such that we can have the data portion align to 512 byte boundary. This also means that we cannot reference headers or data using structure but rather accessors (as they may move based on alignment). Also, get rid of the wrong __packed annotation from iser_rx_desc as this has only harmful effects (not aligned to anything). This affects the rx descriptors for iscsi login and data plane. Fixes: 3d75ca0ade ("block: introduce multi-page bvec helpers") Link: https://lore.kernel.org/r/20200904195039.31687-1-sagi@grimberg.me Reported-by: Stephen Rust <srust@blockbridge.com> Tested-by: Doug Dumitru <doug@dumitru.com> Signed-off-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-09-17 13:47:44 +02:00
..
core	RDMA/core: Fix reported speed and width	2020-09-17 13:47:43 +02:00
hw	RDMA/bnxt_re: Do not report transparent vlan from QP1	2020-09-17 13:47:42 +02:00
sw	RDMA/rxe: Fix panic when calling kmem_cache_create()	2020-09-17 13:47:42 +02:00
ulp	IB/isert: Fix unaligned immediate-data handling	2020-09-17 13:47:44 +02:00
Kconfig	RDMA/odp: Use the common interval tree library instead of generic	2019-08-21 13:34:09 -03:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00