Vitaly Kuznetsov e8f0a89cd7 hv_netvsc: fix a race between netvsc_send() and netvsc_init_buf() ... Fix in commit 8809883482 ("hv_netvsc: set nvdev link after populating chn_table") turns out to be incomplete. A crash in netvsc_get_next_send_section() is observed on mtu change when the device is under load. The race I identified is: if we get to netvsc_send() after we set net_device_ctx->nvdev link in netvsc_device_add() but before we finish netvsc_connect_vsp()->netvsc_init_buf() send_section_map is not allocated and we crash. Unfortunately we can't set net_device_ctx->nvdev link after the netvsc_init_buf() call as during the negotiation we need to receive packets and on the receive path we check for it. It would probably be possible to split nvdev into a pair of nvdev_in and nvdev_out links and check them accordingly in get_outbound_net_device()/ get_inbound_net_device() but this looks like an overkill. Check that send_section_map is allocated in netvsc_send(). Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-10-21 11:27:31 -04:00
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hyperv_net.h	net: use core MTU range checking in virt drivers	2016-10-20 14:51:09 -04:00
Kconfig	staging: hv: move hv_netvsc out of staging area	2011-11-29 16:12:36 +09:00
Makefile	staging: hv: move hv_netvsc out of staging area	2011-11-29 16:12:36 +09:00
netvsc_drv.c	net: use core MTU range checking in virt drivers	2016-10-20 14:51:09 -04:00
netvsc.c	hv_netvsc: fix a race between netvsc_send() and netvsc_init_buf()	2016-10-21 11:27:31 -04:00
rndis_filter.c	hv_netvsc: style cleanups	2016-08-23 12:05:36 -07:00