Ilya Maximets 5464c3a0e9 xdp: fix potential deadlock on socket mutex ... There are 2 call chains: a) xsk_bind --> xdp_umem_assign_dev b) unregister_netdevice_queue --> xsk_notifier with the following locking order: a) xs->mutex --> rtnl_lock b) rtnl_lock --> xdp.lock --> xs->mutex Different order of taking 'xs->mutex' and 'rtnl_lock' could produce a deadlock here. Fix that by moving the 'rtnl_lock' before 'xs->lock' in the bind call chain (a). Reported-by: syzbot+bf64ec93de836d7f4c2c@syzkaller.appspotmail.com Fixes: 455302d1c9 ("xdp: fix hang while unregistering device bound to xdp socket") Signed-off-by: Ilya Maximets <i.maximets@samsung.com> Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>		2019-07-12 15:02:21 +02:00
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Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
xdp_umem.c	xdp: fix potential deadlock on socket mutex	2019-07-12 15:02:21 +02:00
xdp_umem.h	xdp: fix hang while unregistering device bound to xdp socket	2019-07-03 15:10:55 +02:00
xsk_diag.c	xsk: fix potential crash in xsk_diag_put_umem()	2019-03-07 10:36:37 +01:00
xsk_queue.c	net: xsk: add a simple buffer reuse queue	2018-09-25 13:13:15 -07:00
xsk_queue.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-07-08 19:48:57 -07:00
xsk.c	xdp: fix potential deadlock on socket mutex	2019-07-12 15:02:21 +02:00
xsk.h	xsk: add sock_diag interface for AF_XDP	2019-01-25 01:50:03 +01:00