This is a note to let you know that I've just added the patch titled
hv_netvsc: Fix potential dereference of NULL pointer
to the 5.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hv_netvsc-fix-potential-dereference-of-null-pointer.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6260290a5518da6abe58fb0bc9c99c8d9fd8ca1b
Author: Yongzhi Liu <lyz_cs@xxxxxxxxxx>
Date: Thu May 19 05:09:48 2022 -0700
hv_netvsc: Fix potential dereference of NULL pointer
[ Upstream commit eb4c0788964730d12e8dd520bd8f5217ca48321c ]
The return value of netvsc_devinfo_get()
needs to be checked to avoid use of NULL
pointer in case of an allocation failure.
Fixes: 0efeea5fb153 ("hv_netvsc: Add the support of hibernation")
Signed-off-by: Yongzhi Liu <lyz_cs@xxxxxxxxxx>
Reviewed-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/1652962188-129281-1-git-send-email-lyz_cs@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index fde1c492ca02..b1dece6b9698 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -2671,7 +2671,10 @@ static int netvsc_suspend(struct hv_device *dev)
/* Save the current config info */
ndev_ctx->saved_netvsc_dev_info = netvsc_devinfo_get(nvdev);
-
+ if (!ndev_ctx->saved_netvsc_dev_info) {
+ ret = -ENOMEM;
+ goto out;
+ }
ret = netvsc_detach(net, nvdev);
out:
rtnl_unlock();
