This is a note to let you know that I've just added the patch titled RDMA/core: Fix incorrect structure packing for booleans to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: rdma-core-fix-incorrect-structure-packing-for-booleans.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 55efcfcd7776165b294f8b5cd6e05ca00ec89b7c Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx> Date: Thu, 22 Dec 2016 18:07:52 -0700 Subject: RDMA/core: Fix incorrect structure packing for booleans From: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx> commit 55efcfcd7776165b294f8b5cd6e05ca00ec89b7c upstream. The RDMA core uses ib_pack() to convert from unpacked CPU structs to on-the-wire bitpacked structs. This process requires that 1 bit fields are declared as u8 in the unpacked struct, otherwise the packing process does not read the value properly and the packed result is wired to 0. Several places wrongly used int. Crucially this means the kernel has never, set reversible correctly in the path record request. It has always asked for irreversible paths even if the ULP requests otherwise. When the kernel is used with a SM that supports this feature, it completely breaks communication management if reversible paths are not properly requested. The only reason this ever worked is because opensm ignores the reversible bit. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- include/rdma/ib_sa.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/include/rdma/ib_sa.h +++ b/include/rdma/ib_sa.h @@ -153,12 +153,12 @@ struct ib_sa_path_rec { union ib_gid sgid; __be16 dlid; __be16 slid; - int raw_traffic; + u8 raw_traffic; /* reserved */ __be32 flow_label; u8 hop_limit; u8 traffic_class; - int reversible; + u8 reversible; u8 numb_path; __be16 pkey; __be16 qos_class; @@ -220,7 +220,7 @@ struct ib_sa_mcmember_rec { u8 hop_limit; u8 scope; u8 join_state; - int proxy_join; + u8 proxy_join; }; /* Service Record Component Mask Sec 15.2.5.14 Ver 1.1 */ Patches currently in stable-queue which might be from jgunthorpe@xxxxxxxxxxxxxxxxxxxx are queue-4.9/tpm_tis-fix-the-error-handling-of-init_tis.patch queue-4.9/rdma-core-fix-incorrect-structure-packing-for-booleans.patch