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| author | Yongzhi Liu <lyz_cs@pku.edu.cn> | 2022-05-19 15:09:48 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-09 11:23:02 +0300 |
| commit | a459bd84ad41503e301ab9e366b271fb5128af20 (patch) | |
| tree | 53d9bc21aa4b843c33300afc55d2c21fb4724062 /drivers/net/hyperv | |
| parent | 651c6b2d1dacbddc2fa64738b249e5a42686ebe8 (diff) | |
| download | linux-a459bd84ad41503e301ab9e366b271fb5128af20.tar.xz | |
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@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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net/hyperv')
| -rw-r--r-- | drivers/net/hyperv/netvsc_drv.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index bdfcf75f0827..ae4577731e3e 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -2665,7 +2665,10 @@ 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(); |