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| author |   Jiasheng Jiang <jiasheng@iscas.ac.cn> | 2022-03-14 10:01:25 +0800 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2022-03-15 21:57:53 -0700 |
| commit | 886e44c9298a6b428ae046e2fa092ca52e822e6a (patch) | |
| tree | 45806e15f07dc71f034913207880082561765f57 /drivers/net/hyperv | |
| parent | Add Paolo Abeni to networking maintainers (diff) | |
| download | wireguard-linux-886e44c9298a6b428ae046e2fa092ca52e822e6a.tar.xz wireguard-linux-886e44c9298a6b428ae046e2fa092ca52e822e6a.zip | |
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.c | 3 |
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]; |