FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2025-01-13 04:41:17 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

netvsc: fix race during initialization

Browse Source 
When device is being setup on boot, there is a small race where
network device callback is registered, but the netvsc_device pointer
is not set yet.  This can cause a NULL ptr dereference if packet
arrives during this window.

Fixes: 46b4f7f5d1f7 ("netvsc: eliminate per-device outstanding send counter")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2017-03-16 12:21:32 -07:00 committed by David S. Miller
parent d12c917691
commit e14b4db7a5
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/net/hyperv/netvsc.c
View File

@ -1231,8 +1231,11 @@ void netvsc_channel_cb(void *context)
return;
net_device = net_device_to_netvsc_device(ndev);
if (unlikely(net_device->destroy) &&
netvsc_channel_idle(net_device, q_idx))
if (unlikely(!net_device))
return;
if (unlikely(net_device->destroy &&
netvsc_channel_idle(net_device, q_idx)))
return;
/* commit_rd_index() -> hv_signal_on_read() needs this. */