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RDMA/irdma: Prevent zero-length STAG registration

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[ Upstream commit bb6d73d9ad ]

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: b48c24c2d7 ("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: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christopher Bednarz 2023-08-18 09:48:38 -05:00 committed by Greg Kroah-Hartman
parent 9406ad6d6c
commit ceba966f1d
3 changed files with 16 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/infiniband/hw/irdma/ctrl.c
View file

@ -1061,6 +1061,9 @@ static int irdma_sc_alloc_stag(struct irdma_sc_dev *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)
@ -1126,6 +1129,9 @@ static int irdma_sc_mr_reg_non_shared(struct irdma_sc_dev *dev,
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)

2
drivers/infiniband/hw/irdma/type.h
View file

@ -971,6 +971,7 @@ 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;
};
@ -998,6 +999,7 @@ 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 {

10
drivers/infiniband/hw/irdma/verbs.c
View file

@ -2552,7 +2552,8 @@ static int irdma_hw_alloc_stag(struct irdma_device *iwdev,
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);
int status;
struct irdma_cqp_request *cqp_request;
struct cqp_cmds_info *cqp_info;
@ -2568,6 +2569,7 @@ static int irdma_hw_alloc_stag(struct irdma_device *iwdev,
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;
@ -2615,6 +2617,8 @@ static struct ib_mr *irdma_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
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;
err_code = irdma_get_pble(iwdev->rf->pble_rsrc, palloc, iwmr->page_cnt,
false);
if (err_code)
@ -2694,7 +2698,8 @@ static int irdma_hwreg_mr(struct irdma_device *iwdev, struct irdma_mr *iwmr,
{
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;
struct irdma_cqp_request *cqp_request;
struct cqp_cmds_info *cqp_info;
@ -2713,6 +2718,7 @@ static int irdma_hwreg_mr(struct irdma_device *iwdev, struct irdma_mr *iwmr,
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