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vdpa/ifc/base: fix null pointer dereference

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Fix null pointer dereference reported in coverity scan.
Output some log information when lm_cfg is null.
Make sure lm_cfg is not null before operate on lm_cfg.

Coverity issue: 378882
Fixes: d7fe5a2861e7 ("net/ifc: support live migration")
Cc: stable@dpdk.org

Signed-off-by: Andy Pei <andy.pei@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Andy Pei 2022-07-08 13:57:41 +08:00 committed by Maxime Coquelin
parent cd79d1b030
commit 60600018d3
2 changed files with 21 additions and 11 deletions
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31
drivers/vdpa/ifc/base/ifcvf.c
View File

@ -87,6 +87,8 @@ next:
}
hw->lm_cfg = hw->mem_resource[4].addr;
if (!hw->lm_cfg)
WARNINGOUT("HW support live migration not support!\n");
if (hw->common_cfg == NULL || hw->notify_base == NULL ||
hw->isr == NULL || hw->dev_cfg == NULL) {
@ -218,17 +220,19 @@ ifcvf_hw_enable(struct ifcvf_hw *hw)
&cfg->queue_used_hi);
IFCVF_WRITE_REG16(hw->vring[i].size, &cfg->queue_size);
if (hw->device_type == IFCVF_BLK)
*(u32 *)(lm_cfg + IFCVF_LM_RING_STATE_OFFSET +
i * IFCVF_LM_CFG_SIZE) =
(u32)hw->vring[i].last_avail_idx |
((u32)hw->vring[i].last_used_idx << 16);
else
*(u32 *)(lm_cfg + IFCVF_LM_RING_STATE_OFFSET +
(i / 2) * IFCVF_LM_CFG_SIZE +
(i % 2) * 4) =
(u32)hw->vring[i].last_avail_idx |
((u32)hw->vring[i].last_used_idx << 16);
if (lm_cfg) {
if (hw->device_type == IFCVF_BLK)
*(u32 *)(lm_cfg + IFCVF_LM_RING_STATE_OFFSET +
i * IFCVF_LM_CFG_SIZE) =
(u32)hw->vring[i].last_avail_idx |
((u32)hw->vring[i].last_used_idx << 16);
else
*(u32 *)(lm_cfg + IFCVF_LM_RING_STATE_OFFSET +
(i / 2) * IFCVF_LM_CFG_SIZE +
(i % 2) * 4) =
(u32)hw->vring[i].last_avail_idx |
((u32)hw->vring[i].last_used_idx << 16);
}
IFCVF_WRITE_REG16(i + 1, &cfg->queue_msix_vector);
if (IFCVF_READ_REG16(&cfg->queue_msix_vector) ==
@ -320,6 +324,8 @@ ifcvf_enable_logging(struct ifcvf_hw *hw, u64 log_base, u64 log_size)
u8 *lm_cfg;
lm_cfg = hw->lm_cfg;
if (!lm_cfg)
return;
*(u32 *)(lm_cfg + IFCVF_LM_BASE_ADDR_LOW) =
log_base & IFCVF_32_BIT_MASK;
@ -342,6 +348,9 @@ ifcvf_disable_logging(struct ifcvf_hw *hw)
u8 *lm_cfg;
lm_cfg = hw->lm_cfg;
if (!lm_cfg)
return;
*(u32 *)(lm_cfg + IFCVF_LM_LOGGING_CTRL) = IFCVF_LM_DISABLE;
}

1
drivers/vdpa/ifc/base/ifcvf_osdep.h
View File

@ -14,6 +14,7 @@
#include <rte_log.h>
#include <rte_io.h>
#define WARNINGOUT(S, args...) RTE_LOG(WARNING, PMD, S, ##args)
#define DEBUGOUT(S, args...) RTE_LOG(DEBUG, PMD, S, ##args)
#define STATIC static