Maxim Mikityanskiy b425e24a93 xsk: Clear pool even for inactive queues ... The number of queues can change by other means, rather than ethtool. For example, attaching an mqprio qdisc with num_tc > 1 leads to creating multiple sets of TX queues, which may be then destroyed when mqprio is deleted. If an AF_XDP socket is created while mqprio is active, dev->_tx[queue_id].pool will be filled, but then real_num_tx_queues may decrease with deletion of mqprio, which will mean that the pool won't be NULLed, and a further increase of the number of TX queues may expose a dangling pointer. To avoid any potential misbehavior, this commit clears pool for RX and TX queues, regardless of real_num_*_queues, still taking into consideration num_*_queues to avoid overflows. Fixes: 1c1efc2af1 ("xsk: Create and free buffer pool independently from umem") Fixes: a41b4f3c58 ("xsk: simplify xdp_clear_umem_at_qid implementation") Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Björn Töpel <bjorn.topel@intel.com> Link: https://lore.kernel.org/bpf/20210118160333.333439-1-maximmi@mellanox.com		2021-01-19 22:47:04 +01:00
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Kconfig
Makefile
xdp_umem.c
xdp_umem.h
xsk.c	xsk: Clear pool even for inactive queues	2021-01-19 22:47:04 +01:00
xsk.h
xsk_buff_pool.c	xsk: Fix race in SKB mode transmit with shared cq	2020-12-18 16:10:21 +01:00
xsk_diag.c
xsk_queue.c
xsk_queue.h	xsk: Rollback reservation at NETDEV_TX_BUSY	2020-12-18 16:10:21 +01:00
xskmap.c