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RDMA/irdma: Fix potential NULL-ptr-dereference

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[ Upstream commit 5d9745cead ]

in_dev_get() can return NULL which will cause a failure once idev is
dereferenced in in_dev_for_each_ifa_rtnl(). This patch adds a
check for NULL value in idev beforehand.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 146b9756f1 ("RDMA/irdma: Add connection manager")
Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru>
Link: https://lore.kernel.org/r/20230126185230.62464-1-n.zhandarovich@fintech.ru
Reviewed-by: Sindhu Devale <sindhu.devale@intel.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Nikita Zhandarovich
2023-01-26 10:52:30 -08:00
committed by Greg Kroah-Hartman
parent f6d8b6762b
commit 360682fe7d
1 changed files with 3 additions and 0 deletions
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3
drivers/infiniband/hw/irdma/cm.c
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@@ -1722,6 +1722,9 @@ static int irdma_add_mqh_4(struct irdma_device *iwdev,
continue;
idev = in_dev_get(ip_dev);
if (!idev)
continue;
in_dev_for_each_ifa_rtnl(ifa, idev) {
ibdev_dbg(&iwdev->ibdev,
"CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n",