diff mbox series

[net-next,v2,2/3] net: ipvlan: add net device refcount tracker

Message ID e3e05793cbfe0ef491e27e7a865fa644c64522ea.1647568181.git.william.xuanziyang@huawei.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series net: ipvlan: fix potential UAF problem for phy_dev | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1 this patch: 1
netdev/cc_maintainers warning 1 maintainers not CCed: pabeni@redhat.com
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1 this patch: 1
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 23 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Ziyang Xuan (William) March 18, 2022, 1:59 a.m. UTC 
Add net device refcount tracker to ipvlan.

Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
---
 drivers/net/ipvlan/ipvlan.h      | 1 +
 drivers/net/ipvlan/ipvlan_main.c | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ipvlan/ipvlan.h b/drivers/net/ipvlan/ipvlan.h
index 3837c897832e..6605199305b7 100644
--- a/drivers/net/ipvlan/ipvlan.h
+++ b/drivers/net/ipvlan/ipvlan.h
@@ -64,6 +64,7 @@  struct ipvl_dev {
 	struct list_head	pnode;
 	struct ipvl_port	*port;
 	struct net_device	*phy_dev;
+	netdevice_tracker	dev_tracker;
 	struct list_head	addrs;
 	struct ipvl_pcpu_stats	__percpu *pcpu_stats;
 	DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);
diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index dcdc01403f22..be06f122092e 100644
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -160,7 +160,7 @@  static int ipvlan_init(struct net_device *dev)
 	port->count += 1;
 
 	/* Get ipvlan's reference to phy_dev */
-	dev_hold(phy_dev);
+	dev_hold_track(phy_dev, &ipvlan->dev_tracker, GFP_KERNEL);
 
 	return 0;
 }
@@ -674,7 +674,7 @@  static void ipvlan_dev_free(struct net_device *dev)
 	struct ipvl_dev *ipvlan = netdev_priv(dev);
 
 	/* Get rid of the ipvlan's reference to phy_dev */
-	dev_put(ipvlan->phy_dev);
+	dev_put_track(ipvlan->phy_dev, &ipvlan->dev_tracker);
 }
 
 void ipvlan_link_setup(struct net_device *dev)