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RDMA/irdma: Prevent zero-length STAG registration

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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@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Link: https://lore.kernel.org/r/20230818144838.1758-1-shiraz.saleem@intel.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christopher Bednarz 2023-08-18 09:48:38 -05:00 committed by Greg Kroah-Hartman
parent 479e8b8925
commit ac65f8979b
3 changed files with 16 additions and 2 deletions
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6
drivers/infiniband/hw/i40iw/i40iw_ctrl.c
View File

@ -3033,6 +3033,9 @@ static enum i40iw_status_code i40iw_sc_alloc_stag(
u64 header;
enum i40iw_page_size page_size;
if (!info->total_len && !info->all_memory)
return -EINVAL;
page_size = (info->page_size == 0x200000) ? I40IW_PAGE_SIZE_2M : I40IW_PAGE_SIZE_4K;
cqp = dev->cqp;
wqe = i40iw_sc_cqp_get_next_send_wqe(cqp, scratch);
@ -3091,6 +3094,9 @@ static enum i40iw_status_code i40iw_sc_mr_reg_non_shared(
u8 addr_type;
enum i40iw_page_size page_size;
if (!info->total_len && !info->all_memory)
return -EINVAL;
page_size = (info->page_size == 0x200000) ? I40IW_PAGE_SIZE_2M : I40IW_PAGE_SIZE_4K;
if (info->access_rights & (I40IW_ACCESS_FLAGS_REMOTEREAD_ONLY |
I40IW_ACCESS_FLAGS_REMOTEWRITE_ONLY))

2
drivers/infiniband/hw/i40iw/i40iw_type.h
View File

@ -786,6 +786,7 @@ struct i40iw_allocate_stag_info {
bool use_hmc_fcn_index;
u8 hmc_fcn_index;
bool use_pf_rid;
bool all_memory;
};
struct i40iw_reg_ns_stag_info {
@ -804,6 +805,7 @@ struct i40iw_reg_ns_stag_info {
bool use_hmc_fcn_index;
u8 hmc_fcn_index;
bool use_pf_rid;
bool all_memory;
};
struct i40iw_fast_reg_stag_info {

10
drivers/infiniband/hw/i40iw/i40iw_verbs.c
View File

@ -1494,7 +1494,8 @@ static int i40iw_handle_q_mem(struct i40iw_device *iwdev,
static int i40iw_hw_alloc_stag(struct i40iw_device *iwdev, struct i40iw_mr *iwmr)
{
struct i40iw_allocate_stag_info *info;
struct i40iw_pd *iwpd = to_iwpd(iwmr->ibmr.pd);
struct ib_pd *pd = iwmr->ibmr.pd;
struct i40iw_pd *iwpd = to_iwpd(pd);
enum i40iw_status_code status;
int err = 0;
struct i40iw_cqp_request *cqp_request;
@ -1511,6 +1512,7 @@ static int i40iw_hw_alloc_stag(struct i40iw_device *iwdev, struct i40iw_mr *iwmr
info->stag_idx = iwmr->stag >> I40IW_CQPSQ_STAG_IDX_SHIFT;
info->pd_id = iwpd->sc_pd.pd_id;
info->total_len = iwmr->length;
info->all_memory = pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY;
info->remote_access = true;
cqp_info->cqp_cmd = OP_ALLOC_STAG;
cqp_info->post_sq = 1;
@ -1563,6 +1565,8 @@ static struct ib_mr *i40iw_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
iwmr->type = IW_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->length = max_num_sg * PAGE_SIZE;
mutex_lock(&iwdev->pbl_mutex);
status = i40iw_get_pble(&iwdev->sc_dev, iwdev->pble_rsrc, palloc, iwmr->page_cnt);
mutex_unlock(&iwdev->pbl_mutex);
@ -1659,7 +1663,8 @@ static int i40iw_hwreg_mr(struct i40iw_device *iwdev,
{
struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
struct i40iw_reg_ns_stag_info *stag_info;
struct i40iw_pd *iwpd = to_iwpd(iwmr->ibmr.pd);
struct ib_pd *pd = iwmr->ibmr.pd;
struct i40iw_pd *iwpd = to_iwpd(pd);
struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
enum i40iw_status_code status;
int err = 0;
@ -1679,6 +1684,7 @@ static int i40iw_hwreg_mr(struct i40iw_device *iwdev,
stag_info->total_len = iwmr->length;
stag_info->access_rights = access;
stag_info->pd_id = iwpd->sc_pd.pd_id;
stag_info->all_memory = pd->flags & IB_PD_UNSAFE_GLOBAL_RKEY;
stag_info->addr_type = I40IW_ADDR_TYPE_VA_BASED;
stag_info->page_size = iwmr->page_size;