| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 183/329] IB/mlx4: Fix corruption of RoCEv2 IPv4 GIDs | Date | Mon, 28 May 2018 12:01:52 +0200 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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From: Jack Morgenstein <jackm@dev.mellanox.co.il>
[ Upstream commit 0077416a3d529baccbe07ab3242e8db541cfadf6 ]
When using IPv4 addresses in RoCEv2, the GID format for the mapped IPv4 address should be: ::ffff:<4-byte IPv4 address>.
In the cited commit, IPv4 mapped IPV6 addresses had the 3 upper dwords zeroed out by memset, which resulted in deleting the ffff field.
However, since procedure ipv6_addr_v4mapped() already verifies that the gid has format ::ffff:<ipv4 address>, no change is needed for the gid, and the memset can simply be removed.
Fixes: 7e57b85c444c ("IB/mlx4: Add support for setting RoCEv2 gids in hardware") Reviewed-by: Moni Shoua <monis@mellanox.com> Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/infiniband/hw/mlx4/main.c | 2 -- 1 file changed, 2 deletions(-)
--- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -216,8 +216,6 @@ static int mlx4_ib_update_gids_v1_v2(str gid_tbl[i].version = 2; if (!ipv6_addr_v4mapped((struct in6_addr *)&gids[i].gid)) gid_tbl[i].type = 1; - else - memset(&gid_tbl[i].gid, 0, 12); } }
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