From: Andy Pei <andy.pei@intel.com>
To: dev@dpdk.org
Cc: chenbo.xia@intel.com, maxime.coquelin@redhat.com,
xiao.w.wang@intel.com, rosen.xu@intel.com, qimaix.xiao@intel.com
Subject: [PATCH] vdpa/ifc: fix null pointer dereference
Date: Wed, 8 Jun 2022 15:34:02 +0800 [thread overview]
Message-ID: <1654673642-151882-1-git-send-email-andy.pei@intel.com> (raw)
Fix null pointer dereference reported in coverity scan.
Coverity issue: 378882
Fixes: 8162a4a9 ("vdpa/ifc/base: access correct register for blk device")
Signed-off-by: Andy Pei <andy.pei@intel.com>
---
drivers/vdpa/ifc/base/ifcvf.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/vdpa/ifc/base/ifcvf.c b/drivers/vdpa/ifc/base/ifcvf.c
index dd475a7..0a9f71a 100644
--- a/drivers/vdpa/ifc/base/ifcvf.c
+++ b/drivers/vdpa/ifc/base/ifcvf.c
@@ -255,6 +255,10 @@
u32 ring_state;
cfg = hw->common_cfg;
+ if (!cfg) {
+ DEBUGOUT("common_cfg in HW is NULL.\n");
+ return;
+ }
IFCVF_WRITE_REG16(IFCVF_MSI_NO_VECTOR, &cfg->msix_config);
for (i = 0; i < hw->nr_vring; i++) {
@@ -262,6 +266,11 @@
IFCVF_WRITE_REG16(0, &cfg->queue_enable);
IFCVF_WRITE_REG16(IFCVF_MSI_NO_VECTOR, &cfg->queue_msix_vector);
+ if (!hw->lm_cfg) {
+ DEBUGOUT("live migration cfg in HW is NULL.\n");
+ continue;
+ }
+
if (hw->device_type == IFCVF_BLK)
ring_state = *(u32 *)(hw->lm_cfg +
IFCVF_LM_RING_STATE_OFFSET +
--
1.8.3.1
next reply other threads:[~2022-06-08 8:23 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-08 7:34 Andy Pei [this message]
2022-06-08 8:25 ` Wang, Xiao W
2022-06-15 2:04 ` Xia, Chenbo
2022-06-15 7:08 ` Pei, Andy
2022-06-15 6:23 ` [PATCH v2] " Andy Pei
2022-06-17 12:40 ` Maxime Coquelin
2022-06-17 14:07 ` Maxime Coquelin
2022-06-18 9:04 ` Pei, Andy
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