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hv_netvsc: Fix potential dereference of NULL pointer
author
Yongzhi Liu
<lyz_cs@pku.edu.cn>
Thu, 19 May 2022 12:09:48 +0000
(
05:09
-0700)
committer
Jakub Kicinski
<kuba@kernel.org>
Sat, 21 May 2022 00:45:31 +0000
(17:45 -0700)
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@pku.edu.cn>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Link:
https://lore.kernel.org/r/1652962188-129281-1-git-send-email-lyz_cs@pku.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
drivers/net/hyperv/netvsc_drv.c
patch
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diff --git
a/drivers/net/hyperv/netvsc_drv.c
b/drivers/net/hyperv/netvsc_drv.c
index
fde1c49
..
b1dece6
100644
(file)
--- 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();