Paul Durrant fd42bfd1bb xen-netback: avoid race that can lead to NULL pointer dereference ... In function xenvif_disconnect_queue(), the value of queue->rx_irq is zeroed *before* queue->task is stopped. Unfortunately that task may call notify_remote_via_irq(queue->rx_irq) and calling that function with a zero value results in a NULL pointer dereference in evtchn_from_irq(). This patch simply re-orders things, stopping all tasks before zero-ing the irq values, thereby avoiding the possibility of the race. Fixes: 2ac061ce97 ("xen/netback: cleanup init and deinit code") Signed-off-by: Paul Durrant <pdurrant@amazon.com> Acked-by: Wei Liu <wei.liu@kernel.org> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>		2019-12-15 11:40:15 -08:00
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Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
common.h	xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis	2019-04-12 10:10:28 -07:00
hash.c	xen-netback: don't populate the hash cache on XenBus disconnect	2019-02-28 12:50:37 -08:00
interface.c	xen-netback: avoid race that can lead to NULL pointer dereference	2019-12-15 11:40:15 -08:00
netback.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2019-08-19 11:54:03 -07:00
rx.c	xen-netback: make function xenvif_rx_skb static	2018-02-26 11:36:54 -05:00
xenbus.c	xen-netback: no need to check return value of debugfs_create functions	2019-08-11 21:30:06 -07:00