Stefano Brivio ad6c9986bc
vxlan: Fix GRO cells race condition between receive and link delete ...
If we receive a packet while deleting a VXLAN device, there's a chance
vxlan_rcv() is called at the same time as vxlan_dellink(). This is fine,
except that vxlan_dellink() should never ever touch stuff that's still in
use, such as the GRO cells list.
Otherwise, vxlan_rcv() crashes while queueing packets via
gro_cells_receive().
Move the gro_cells_destroy() to vxlan_uninit(), which runs after the RCU
grace period is elapsed and nothing needs the gro_cells anymore.
This is now done in the same way as commit 8e816df879jishi@redhat.com >
Fixes: 58ce31cca1sbrivio@redhat.com >
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net >
Reviewed-by: Eric Dumazet <edumazet@google.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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ad6c9986bc