From: Kees Cook <keescook@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>,
Leon Romanovsky <leon@kernel.org>,
Doug Ledford <dledford@redhat.com>,
Jason Gunthorpe <jgg@ziepe.ca>,
linux-rdma@vger.kernel.org,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-staging@lists.linux.dev,
linux-block@vger.kernel.org, linux-kbuild@vger.kernel.org,
clang-built-linux@googlegroups.com,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
linux-hardening@vger.kernel.org
Subject: [PATCH v2 56/63] RDMA/mlx5: Use struct_group() to zero struct mlx5_ib_mr
Date: Tue, 17 Aug 2021 23:05:26 -0700 [thread overview]
Message-ID: <20210818060533.3569517-57-keescook@chromium.org> (raw)
In-Reply-To: <20210818060533.3569517-1-keescook@chromium.org>
In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memset(), avoid intentionally writing across
neighboring fields.
Add struct_group() to mark region of struct mlx5_ib_mr that should be
initialized to zero.
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: linux-rdma@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/infiniband/hw/mlx5/mlx5_ib.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index bf20a388eabe..f63bf204a7a1 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -644,6 +644,7 @@ struct mlx5_ib_mr {
struct ib_umem *umem;
/* This is zero'd when the MR is allocated */
+ struct_group(cleared,
union {
/* Used only while the MR is in the cache */
struct {
@@ -691,12 +692,13 @@ struct mlx5_ib_mr {
bool is_odp_implicit;
};
};
+ );
};
/* Zero the fields in the mr that are variant depending on usage */
static inline void mlx5_clear_mr(struct mlx5_ib_mr *mr)
{
- memset(mr->out, 0, sizeof(*mr) - offsetof(struct mlx5_ib_mr, out));
+ memset(&mr->cleared, 0, sizeof(mr->cleared));
}
static inline bool is_odp_mr(struct mlx5_ib_mr *mr)
--
2.30.2
next prev parent reply other threads:[~2021-08-18 6:19 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210818060533.3569517-1-keescook@chromium.org>
2021-08-18 6:04 ` [PATCH v2 02/63] net/mlx5e: Avoid field-overflowing memcpy() Kees Cook
2021-08-18 6:04 ` [PATCH v2 21/63] net/mlx5e: Use struct_group() for memcpy() region Kees Cook
2021-08-18 6:05 ` [PATCH v2 46/63] iw_cxgb4: Use memset_startat() for cpl_t5_pass_accept_rpl Kees Cook
2021-08-18 6:05 ` [PATCH v2 48/63] IB/mthca: Use memset_startat() for clearing mpt_entry Kees Cook
2021-08-18 6:05 ` Kees Cook [this message]
2021-08-19 12:27 ` [PATCH v2 56/63] RDMA/mlx5: Use struct_group() to zero struct mlx5_ib_mr Jason Gunthorpe
2021-08-19 16:19 ` Kees Cook
2021-08-19 16:47 ` Jason Gunthorpe
2021-08-19 18:14 ` Kees Cook
2021-08-20 12:34 ` Jason Gunthorpe
2021-08-20 15:56 ` Kees Cook
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