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authorJiasheng Jiang <jiasheng@iscas.ac.cn>2022-03-14 10:01:25 +0800
committerJakub Kicinski <kuba@kernel.org>2022-03-15 21:57:53 -0700
commit886e44c9298a6b428ae046e2fa092ca52e822e6a (patch)
tree45806e15f07dc71f034913207880082561765f57 /drivers/net/hyperv
parente9c14b59ea2ec19afe22d60b07583b7e08c74290 (diff)
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hv_netvsc: Add check for kvmalloc_array
As the potential failure of the kvmalloc_array(), it should be better to check and restore the 'data' if fails in order to avoid the dereference of the NULL pointer. Fixes: 6ae746711263 ("hv_netvsc: Add per-cpu ethtool stats for netvsc") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> Link: https://lore.kernel.org/r/20220314020125.2365084-1-jiasheng@iscas.ac.cn Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/hyperv')
-rw-r--r--drivers/net/hyperv/netvsc_drv.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 3646469433b1..fde1c492ca02 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -1587,6 +1587,9 @@ static void netvsc_get_ethtool_stats(struct net_device *dev,
pcpu_sum = kvmalloc_array(num_possible_cpus(),
sizeof(struct netvsc_ethtool_pcpu_stats),
GFP_KERNEL);
+ if (!pcpu_sum)
+ return;
+
netvsc_get_pcpu_stats(dev, pcpu_sum);
for_each_present_cpu(cpu) {
struct netvsc_ethtool_pcpu_stats *this_sum = &pcpu_sum[cpu];