This is a note to let you know that I've just added the patch titled
RDMA/irdma: Prevent zero-length STAG registration
to the 5.15-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-irdma-prevent-zero-length-stag-registration.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bb6d73d9add68ad270888db327514384dfa44958 Mon Sep 17 00:00:00 2001
From: Christopher Bednarz <christopher.n.bednarz@xxxxxxxxx>
Date: Fri, 18 Aug 2023 09:48:38 -0500
Subject: RDMA/irdma: Prevent zero-length STAG registration
From: Christopher Bednarz <christopher.n.bednarz@xxxxxxxxx>
commit bb6d73d9add68ad270888db327514384dfa44958 upstream.
Currently irdma allows zero-length STAGs to be programmed in HW during
the kernel mode fast register flow. Zero-length MR or STAG registration
disable HW memory length checks.
Improve gaps in bounds checking in irdma by preventing zero-length STAG or
MR registrations except if the IB_PD_UNSAFE_GLOBAL_RKEY is set.
This addresses the disclosure CVE-2023-25775.
Fixes: b48c24c2d710 ("RDMA/irdma: Implement device supported verb APIs")
Signed-off-by: Christopher Bednarz <christopher.n.bednarz@xxxxxxxxx>
Signed-off-by: Shiraz Saleem <shiraz.saleem@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230818144838.1758-1-shiraz.saleem@xxxxxxxxx
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/irdma/ctrl.c | 6 ++++++
drivers/infiniband/hw/irdma/type.h | 2 ++
drivers/infiniband/hw/irdma/verbs.c | 10 ++++++++--
3 files changed, 16 insertions(+), 2 deletions(-)
--- a/drivers/infiniband/hw/irdma/ctrl.c
+++ b/drivers/infiniband/hw/irdma/ctrl.c
@@ -1043,6 +1043,9 @@ irdma_sc_alloc_stag(struct irdma_sc_dev
u64 hdr;
enum irdma_page_size page_size;
+ if (!info->total_len && !info->all_memory)
+ return -EINVAL;
+
if (info->page_size == 0x40000000)
page_size = IRDMA_PAGE_SIZE_1G;
else if (info->page_size == 0x200000)
@@ -1109,6 +1112,9 @@ irdma_sc_mr_reg_non_shared(struct irdma_
u8 addr_type;
enum irdma_page_size page_size;
+ if (!info->total_len && !info->all_memory)
+ return -EINVAL;
+
if (info->page_size == 0x40000000)
page_size = IRDMA_PAGE_SIZE_1G;
else if (info->page_size == 0x200000)
--- a/drivers/infiniband/hw/irdma/type.h
+++ b/drivers/infiniband/hw/irdma/type.h
@@ -1013,6 +1013,7 @@ struct irdma_allocate_stag_info {
bool remote_access:1;
bool use_hmc_fcn_index:1;
bool use_pf_rid:1;
+ bool all_memory:1;
u8 hmc_fcn_index;
};
@@ -1040,6 +1041,7 @@ struct irdma_reg_ns_stag_info {
bool use_hmc_fcn_index:1;
u8 hmc_fcn_index;
bool use_pf_rid:1;
+ bool all_memory:1;
};
struct irdma_fast_reg_stag_info {
--- a/drivers/infiniband/hw/irdma/verbs.c
+++ b/drivers/infiniband/hw/irdma/verbs.c
@@ -2528,7 +2528,8 @@ static int irdma_hw_alloc_stag(struct ir
struct irdma_mr *iwmr)
{
struct irdma_allocate_stag_info *info;
- struct irdma_pd *iwpd = to_iwpd(iwmr->ibmr.pd);
+ struct ib_pd *pd = iwmr->ibmr.pd;
+ struct irdma_pd *iwpd = to_iwpd(pd);
enum irdma_status_code status;
int err = 0;
struct irdma_cqp_request *cqp_request;
@@ -2545,6 +2546,7 @@ static int irdma_hw_alloc_stag(struct ir
info->stag_idx = iwmr->stag >> IRDMA_CQPSQ_STAG_IDX_S;
info->pd_id = iwpd->sc_pd.pd_id;
info->total_len = iwmr->len;
+ info->all_memory = pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY;
info->remote_access = true;
cqp_info->cqp_cmd = IRDMA_OP_ALLOC_STAG;
cqp_info->post_sq = 1;
@@ -2595,6 +2597,8 @@ static struct ib_mr *irdma_alloc_mr(stru
iwmr->type = IRDMA_MEMREG_TYPE_MEM;
palloc = &iwpbl->pble_alloc;
iwmr->page_cnt = max_num_sg;
+ /* Use system PAGE_SIZE as the sg page sizes are unknown at this point */
+ iwmr->len = max_num_sg * PAGE_SIZE;
status = irdma_get_pble(iwdev->rf->pble_rsrc, palloc, iwmr->page_cnt,
true);
if (status)
@@ -2666,7 +2670,8 @@ static int irdma_hwreg_mr(struct irdma_d
{
struct irdma_pbl *iwpbl = &iwmr->iwpbl;
struct irdma_reg_ns_stag_info *stag_info;
- struct irdma_pd *iwpd = to_iwpd(iwmr->ibmr.pd);
+ struct ib_pd *pd = iwmr->ibmr.pd;
+ struct irdma_pd *iwpd = to_iwpd(pd);
struct irdma_pble_alloc *palloc = &iwpbl->pble_alloc;
enum irdma_status_code status;
int err = 0;
@@ -2686,6 +2691,7 @@ static int irdma_hwreg_mr(struct irdma_d
stag_info->total_len = iwmr->len;
stag_info->access_rights = irdma_get_mr_access(access);
stag_info->pd_id = iwpd->sc_pd.pd_id;
+ stag_info->all_memory = pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY;
if (stag_info->access_rights & IRDMA_ACCESS_FLAGS_ZERO_BASED)
stag_info->addr_type = IRDMA_ADDR_TYPE_ZERO_BASED;
else
Patches currently in stable-queue which might be from christopher.n.bednarz@xxxxxxxxx are
queue-5.15/rdma-irdma-prevent-zero-length-stag-registration.patch
