xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

hv_netvsc: Add check for kvmalloc_array

Browse Source 
[ Upstream commit 886e44c9298a6b428ae046e2fa092ca52e822e6a ]

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: 6ae7467112 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jiasheng Jiang
2022-03-14 10:01:25 +08:00
committed by Greg Kroah-Hartman
parent 09a7264fb0
commit 9b763ceda6
1 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/hyperv/netvsc_drv.c
View File

@@ -1562,6 +1562,9 @@ 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];