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scsi: be2iscsi: Fix _modify_eq_delay buffer overflow 

beiscsi_modify_eq_delay is using embedded command to send request of 788
bytes in 236 bytes buffer. Non-embedded command needs to be used in such
cases.

Use mgmt_alloc_cmd_data fn modified to allow passing of subsystem.  Use
mgmt_exec_nonemb_cmd fn modified to allow setting of callback.

Signed-off-by: Jitendra Bhivare <jitendra.bhivare@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Jitendra Bhivare 2017-10-10 16:18:14 +05:30 committed by Martin K. Petersen
parent 45371aa398
commit a39e9f71e5
3 changed files with 124 additions and 98 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/scsi/be2iscsi/be_cmds.c
View File

@ -675,8 +675,8 @@ static int be_mbox_notify(struct be_ctrl_info *ctrl)
return status;
}
void be_wrb_hdr_prepare(struct be_mcc_wrb *wrb, int payload_len,
bool embedded, u8 sge_cnt)
void be_wrb_hdr_prepare(struct be_mcc_wrb *wrb, u32 payload_len,
bool embedded, u8 sge_cnt)
{
if (embedded)
wrb->emb_sgecnt_special |= MCC_WRB_EMBEDDED_MASK;
@ -688,7 +688,7 @@ void be_wrb_hdr_prepare(struct be_mcc_wrb *wrb, int payload_len,
}
void be_cmd_hdr_prepare(struct be_cmd_req_hdr *req_hdr,
u8 subsystem, u8 opcode, int cmd_len)
u8 subsystem, u8 opcode, u32 cmd_len)
{
req_hdr->opcode = opcode;
req_hdr->subsystem = subsystem;

4
drivers/scsi/be2iscsi/be_cmds.h
View File

@ -1444,9 +1444,9 @@ struct be_cmd_get_port_name {
* the cxn
*/
void be_wrb_hdr_prepare(struct be_mcc_wrb *wrb, int payload_len,
void be_wrb_hdr_prepare(struct be_mcc_wrb *wrb, u32 payload_len,
bool embedded, u8 sge_cnt);
void be_cmd_hdr_prepare(struct be_cmd_req_hdr *req_hdr,
u8 subsystem, u8 opcode, int cmd_len);
u8 subsystem, u8 opcode, u32 cmd_len);
#endif /* !BEISCSI_CMDS_H */

212
drivers/scsi/be2iscsi/be_mgmt.c
View File

@ -19,43 +19,6 @@
#include "be_iscsi.h"
#include "be_main.h"
int beiscsi_modify_eq_delay(struct beiscsi_hba *phba,
struct be_set_eqd *set_eqd,
int num)
{
struct be_ctrl_info *ctrl = &phba->ctrl;
struct be_mcc_wrb *wrb;
struct be_cmd_req_modify_eq_delay *req;
unsigned int tag;
int i;
mutex_lock(&ctrl->mbox_lock);
wrb = alloc_mcc_wrb(phba, &tag);
if (!wrb) {
mutex_unlock(&ctrl->mbox_lock);
return 0;
}
req = embedded_payload(wrb);
be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_COMMON,
OPCODE_COMMON_MODIFY_EQ_DELAY, sizeof(*req));
req->num_eq = cpu_to_le32(num);
for (i = 0; i < num; i++) {
req->delay[i].eq_id = cpu_to_le32(set_eqd[i].eq_id);
req->delay[i].phase = 0;
req->delay[i].delay_multiplier =
cpu_to_le32(set_eqd[i].delay_multiplier);
}
/* ignore the completion of this mbox command */
set_bit(MCC_TAG_STATE_IGNORE, &ctrl->ptag_state[tag].tag_state);
be_mcc_notify(phba, tag);
mutex_unlock(&ctrl->mbox_lock);
return tag;
}
unsigned int mgmt_vendor_specific_fw_cmd(struct be_ctrl_info *ctrl,
struct beiscsi_hba *phba,
struct bsg_job *job,
@ -236,16 +199,19 @@ int mgmt_open_connection(struct beiscsi_hba *phba,
}
/*
* mgmt_exec_nonemb_cmd()- Execute Non Embedded MBX Cmd
* @phba: Driver priv structure
* @nonemb_cmd: Address of the MBX command issued
* @resp_buf: Buffer to copy the MBX cmd response
* @resp_buf_len: respone lenght to be copied
* beiscsi_exec_nemb_cmd()- execute non-embedded MBX cmd
* @phba: driver priv structure
* @nonemb_cmd: DMA address of the MBX command to be issued
* @cbfn: callback func on MCC completion
* @resp_buf: buffer to copy the MBX cmd response
* @resp_buf_len: response length to be copied
*
**/
static int mgmt_exec_nonemb_cmd(struct beiscsi_hba *phba,
struct be_dma_mem *nonemb_cmd, void *resp_buf,
int resp_buf_len)
static int beiscsi_exec_nemb_cmd(struct beiscsi_hba *phba,
struct be_dma_mem *nonemb_cmd,
void (*cbfn)(struct beiscsi_hba *,
unsigned int),
void *resp_buf, u32 resp_buf_len)
{
struct be_ctrl_info *ctrl = &phba->ctrl;
struct be_mcc_wrb *wrb;
@ -267,36 +233,54 @@ static int mgmt_exec_nonemb_cmd(struct beiscsi_hba *phba,
sge->pa_lo = cpu_to_le32(lower_32_bits(nonemb_cmd->dma));
sge->len = cpu_to_le32(nonemb_cmd->size);
if (cbfn) {
struct be_dma_mem *tag_mem;
set_bit(MCC_TAG_STATE_ASYNC, &ctrl->ptag_state[tag].tag_state);
ctrl->ptag_state[tag].cbfn = cbfn;
tag_mem = &phba->ctrl.ptag_state[tag].tag_mem_state;
/* store DMA mem to be freed in callback */
tag_mem->size = nonemb_cmd->size;
tag_mem->va = nonemb_cmd->va;
tag_mem->dma = nonemb_cmd->dma;
}
be_mcc_notify(phba, tag);
mutex_unlock(&ctrl->mbox_lock);
/* with cbfn set, its async cmd, don't wait */
if (cbfn)
return 0;
rc = beiscsi_mccq_compl_wait(phba, tag, NULL, nonemb_cmd);
/* copy the response, if any */
if (resp_buf)
memcpy(resp_buf, nonemb_cmd->va, resp_buf_len);
/**
* This is special case of NTWK_GET_IF_INFO where the size of
* response is not known. beiscsi_if_get_info checks the return
* value to free DMA buffer.
*/
if (rc == -EAGAIN)
return rc;
if (rc) {
/* Check if the MBX Cmd needs to be re-issued */
if (rc == -EAGAIN)
return rc;
/**
* If FW is busy that is driver timed out, DMA buffer is saved with
* the tag, only when the cmd completes this buffer is freed.
*/
if (rc == -EBUSY)
return rc;
beiscsi_log(phba, KERN_WARNING,
BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
"BG_%d : mgmt_exec_nonemb_cmd Failed status\n");
if (rc != -EBUSY)
goto free_cmd;
else
return rc;
}
free_cmd:
pci_free_consistent(ctrl->pdev, nonemb_cmd->size,
nonemb_cmd->va, nonemb_cmd->dma);
return rc;
}
static int mgmt_alloc_cmd_data(struct beiscsi_hba *phba, struct be_dma_mem *cmd,
int iscsi_cmd, int size)
static int beiscsi_prep_nemb_cmd(struct beiscsi_hba *phba,
struct be_dma_mem *cmd,
u8 subsystem, u8 opcode, u32 size)
{
cmd->va = pci_zalloc_consistent(phba->ctrl.pdev, size, &cmd->dma);
if (!cmd->va) {
@ -305,13 +289,52 @@ static int mgmt_alloc_cmd_data(struct beiscsi_hba *phba, struct be_dma_mem *cmd,
return -ENOMEM;
}
cmd->size = size;
be_cmd_hdr_prepare(cmd->va, CMD_SUBSYSTEM_ISCSI, iscsi_cmd, size);
be_cmd_hdr_prepare(cmd->va, subsystem, opcode, size);
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BG_%d : subsystem iSCSI cmd %d size %d\n",
iscsi_cmd, size);
"BG_%d : subsystem %u cmd %u size %u\n",
subsystem, opcode, size);
return 0;
}
static void __beiscsi_eq_delay_compl(struct beiscsi_hba *phba, unsigned int tag)
{
struct be_dma_mem *tag_mem;
/* status is ignored */
__beiscsi_mcc_compl_status(phba, tag, NULL, NULL);
tag_mem = &phba->ctrl.ptag_state[tag].tag_mem_state;
if (tag_mem->size) {
pci_free_consistent(phba->pcidev, tag_mem->size,
tag_mem->va, tag_mem->dma);
tag_mem->size = 0;
}
}
int beiscsi_modify_eq_delay(struct beiscsi_hba *phba,
struct be_set_eqd *set_eqd, int num)
{
struct be_cmd_req_modify_eq_delay *req;
struct be_dma_mem nonemb_cmd;
int i, rc;
rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_COMMON,
OPCODE_COMMON_MODIFY_EQ_DELAY, sizeof(*req));
if (rc)
return rc;
req = nonemb_cmd.va;
req->num_eq = cpu_to_le32(num);
for (i = 0; i < num; i++) {
req->delay[i].eq_id = cpu_to_le32(set_eqd[i].eq_id);
req->delay[i].phase = 0;
req->delay[i].delay_multiplier =
cpu_to_le32(set_eqd[i].delay_multiplier);
}
return beiscsi_exec_nemb_cmd(phba, &nonemb_cmd,
__beiscsi_eq_delay_compl, NULL, 0);
}
unsigned int beiscsi_if_get_handle(struct beiscsi_hba *phba)
{
struct be_ctrl_info *ctrl = &phba->ctrl;
@ -368,9 +391,9 @@ static int beiscsi_if_mod_gw(struct beiscsi_hba *phba,
struct be_dma_mem nonemb_cmd;
int rt_val;
rt_val = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
OPCODE_COMMON_ISCSI_NTWK_MODIFY_DEFAULT_GATEWAY,
sizeof(*req));
rt_val = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
OPCODE_COMMON_ISCSI_NTWK_MODIFY_DEFAULT_GATEWAY,
sizeof(*req));
if (rt_val)
return rt_val;
@ -379,7 +402,7 @@ static int beiscsi_if_mod_gw(struct beiscsi_hba *phba,
req->ip_addr.ip_type = ip_type;
memcpy(req->ip_addr.addr, gw,
(ip_type < BEISCSI_IP_TYPE_V6) ? IP_V4_LEN : IP_V6_LEN);
return mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);
return beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
}
int beiscsi_if_set_gw(struct beiscsi_hba *phba, u32 ip_type, u8 *gw)
@ -420,17 +443,17 @@ int beiscsi_if_get_gw(struct beiscsi_hba *phba, u32 ip_type,
struct be_dma_mem nonemb_cmd;
int rc;
rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
OPCODE_COMMON_ISCSI_NTWK_GET_DEFAULT_GATEWAY,
sizeof(*resp));
rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
OPCODE_COMMON_ISCSI_NTWK_GET_DEFAULT_GATEWAY,
sizeof(*resp));
if (rc)
return rc;
req = nonemb_cmd.va;
req->ip_type = ip_type;
return mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, resp,
sizeof(*resp));
return beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL,
resp, sizeof(*resp));
}
static int
@ -441,9 +464,9 @@ beiscsi_if_clr_ip(struct beiscsi_hba *phba,
struct be_dma_mem nonemb_cmd;
int rc;
rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR,
sizeof(*req));
rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR,
sizeof(*req));
if (rc)
return rc;
@ -461,7 +484,7 @@ beiscsi_if_clr_ip(struct beiscsi_hba *phba,
memcpy(req->ip_params.ip_record.ip_addr.subnet_mask,
if_info->ip_addr.subnet_mask,
sizeof(if_info->ip_addr.subnet_mask));
rc = mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);
rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
if (rc < 0 || req->ip_params.ip_record.status) {
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BG_%d : failed to clear IP: rc %d status %d\n",
@ -479,9 +502,9 @@ beiscsi_if_set_ip(struct beiscsi_hba *phba, u8 *ip,
uint32_t ip_len;
int rc;
rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR,
sizeof(*req));
rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR,
sizeof(*req));
if (rc)
return rc;
@ -499,7 +522,7 @@ beiscsi_if_set_ip(struct beiscsi_hba *phba, u8 *ip,
memcpy(req->ip_params.ip_record.ip_addr.subnet_mask,
subnet, ip_len);
rc = mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);
rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
/**
* In some cases, host needs to look into individual record status
* even though FW reported success for that IOCTL.
@ -527,7 +550,8 @@ int beiscsi_if_en_static(struct beiscsi_hba *phba, u32 ip_type,
return rc;
if (if_info->dhcp_state) {
rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd,
CMD_SUBSYSTEM_ISCSI,
OPCODE_COMMON_ISCSI_NTWK_REL_STATELESS_IP_ADDR,
sizeof(*reldhcp));
if (rc)
@ -536,7 +560,7 @@ int beiscsi_if_en_static(struct beiscsi_hba *phba, u32 ip_type,
reldhcp = nonemb_cmd.va;
reldhcp->interface_hndl = phba->interface_handle;
reldhcp->ip_type = ip_type;
rc = mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);
rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
if (rc < 0) {
beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
"BG_%d : failed to release existing DHCP: %d\n",
@ -606,7 +630,7 @@ int beiscsi_if_en_dhcp(struct beiscsi_hba *phba, u32 ip_type)
}
}
rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
OPCODE_COMMON_ISCSI_NTWK_CONFIG_STATELESS_IP_ADDR,
sizeof(*dhcpreq));
if (rc)
@ -617,7 +641,7 @@ int beiscsi_if_en_dhcp(struct beiscsi_hba *phba, u32 ip_type)
dhcpreq->retry_count = 1;
dhcpreq->interface_hndl = phba->interface_handle;
dhcpreq->ip_type = ip_type;
rc = mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, NULL, 0);
rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, NULL, 0);
exit:
kfree(if_info);
@ -673,9 +697,10 @@ int beiscsi_if_get_info(struct beiscsi_hba *phba, int ip_type,
return rc;
do {
rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
OPCODE_COMMON_ISCSI_NTWK_GET_IF_INFO,
ioctl_size);
rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd,
CMD_SUBSYSTEM_ISCSI,
OPCODE_COMMON_ISCSI_NTWK_GET_IF_INFO,
ioctl_size);
if (rc)
return rc;
@ -698,8 +723,8 @@ int beiscsi_if_get_info(struct beiscsi_hba *phba, int ip_type,
return -ENOMEM;
}
rc = mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, *if_info,
ioctl_size);
rc = beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL, *if_info,
ioctl_size);
/* Check if the error is because of Insufficent_Buffer */
if (rc == -EAGAIN) {
@ -728,13 +753,14 @@ int mgmt_get_nic_conf(struct beiscsi_hba *phba,
struct be_dma_mem nonemb_cmd;
int rc;
rc = mgmt_alloc_cmd_data(phba, &nonemb_cmd,
OPCODE_COMMON_ISCSI_NTWK_GET_NIC_CONFIG,
sizeof(*nic));
rc = beiscsi_prep_nemb_cmd(phba, &nonemb_cmd, CMD_SUBSYSTEM_ISCSI,
OPCODE_COMMON_ISCSI_NTWK_GET_NIC_CONFIG,
sizeof(*nic));
if (rc)
return rc;
return mgmt_exec_nonemb_cmd(phba, &nonemb_cmd, nic, sizeof(*nic));
return beiscsi_exec_nemb_cmd(phba, &nonemb_cmd, NULL,
nic, sizeof(*nic));
}