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5464c3a0e9
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:
|
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---|---|---|
.. | ||
Kconfig | ||
Makefile | ||
xdp_umem.c | ||
xdp_umem.h | ||
xsk_diag.c | ||
xsk_queue.c | ||
xsk_queue.h | ||
xsk.c | ||
xsk.h |