Bui Quang Minh ccc578d2e1 virtio-net: don't schedule delayed refill worker ...

commit fcdef3bcbb upstream.

When we fail to refill the receive buffers, we schedule a delayed worker
to retry later. However, this worker creates some concurrency issues.
For example, when the worker runs concurrently with virtnet_xdp_set,
both need to temporarily disable queue's NAPI before enabling again.
Without proper synchronization, a deadlock can happen when
napi_disable() is called on an already disabled NAPI. That
napi_disable() call will be stuck and so will the subsequent
napi_enable() call.

To simplify the logic and avoid further problems, we will instead retry
refilling in the next NAPI poll.

Fixes: 4bc12818b3 ("virtio-net: disable delayed refill when pausing rx")
Reported-by: Paolo Abeni <pabeni@redhat.com>
Closes: https://lore.kernel.org/526b5396-459d-4d02-8635-a222d07b46d7@redhat.com
Cc: stable@vger.kernel.org
Suggested-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Bui Quang Minh <minhquangbui99@gmail.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://patch.msgid.link/20260106150438.7425-2-minhquangbui99@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-01-23 11:21:25 +01:00

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arcnet

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bonding

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caif

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can

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2026-01-23 11:21:24 +01:00

dsa

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ethernet

net: octeon_ep_vf: fix free_irq dev_id mismatch in IRQ rollback

2026-01-23 11:21:17 +01:00

fddi

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fjes

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hamradio

6pack: drop redundant locking and refcounting

2025-09-30 10:10:59 +02:00

hippi

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hyperv

net: hv_netvsc: reject RSS hash key programming without RX indirection table

2026-01-23 11:21:18 +01:00

ieee802154

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ipa

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ipvlan

ipvlan: Ignore PACKET_LOOPBACK in handle_mode_l2()

2026-01-02 12:56:44 +01:00

mctp

net: mctp: Fix tx queue stall

2025-10-29 17:55:14 -07:00

mdio

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2026-01-08 10:16:47 +01:00

netdevsim

net: netdevsim: fix inconsistent carrier state after link/unlink

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ovpn

ovpn: use datagram_poll_queue for socket readiness in TCP

2025-10-23 15:46:04 +02:00

pcs

net: pcs: Kconfig: Fix unmet dependency warning

2025-09-17 14:57:52 -07:00

phy

net: phy: motorcomm: fix duplex setting error for phy leds

2026-01-23 11:21:17 +01:00

plip

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ppp

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2025-09-04 13:33:00 -07:00

pse-pd

net: pse-pd: tps23881: Fix current measurement scaling

2025-10-07 18:30:53 -07:00

slip

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team

team: fix check for port enabled in team_queue_override_port_prio_changed()

2026-01-08 10:16:45 +01:00

thunderbolt

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usb

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2026-01-17 16:35:29 +01:00

vmxnet3

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vxlan

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wan

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2025-11-05 18:02:34 -08:00

wireguard

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2025-09-22 17:40:30 -07:00

wireless

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wwan

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2026-01-17 16:35:24 +01:00

xen-netback

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amt.c

ipv4: Convert ->flowi4_tos to dscp_t.

2025-08-26 17:34:31 -07:00

bareudp.c

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dummy.c

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eql.c

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geneve.c

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gtp.c

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2025-08-26 17:34:31 -07:00

ifb.c

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Kconfig

wireguard: kconfig: simplify crypto kconfig selections

2025-09-08 09:44:08 -07:00

LICENSE.SRC

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loopback.c

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macsec.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2025-09-11 17:40:13 -07:00

macvlan.c

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2026-01-23 11:21:16 +01:00

macvtap.c

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Makefile

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mdio.c

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mhi_net.c

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mii.c

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net_failover.c

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netconsole.c

netconsole: Acquire su_mutex before navigating configs hierarchy

2025-10-31 17:45:06 -07:00

netkit.c

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nlmon.c

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ntb_netdev.c

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pfcp.c

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rionet.c

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Space.c

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sungem_phy.c

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tap.c

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tun_vnet.h

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2025-11-26 19:45:54 -08:00

tun.c

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2025-09-25 11:00:59 -07:00

veth.c

veth: reduce XDP no_direct return section to fix race

2025-11-20 18:44:32 -08:00

virtio_net.c

virtio-net: don't schedule delayed refill worker

2026-01-23 11:21:25 +01:00

vrf.c

ipv4: Convert ->flowi4_tos to dscp_t.

2025-08-26 17:34:31 -07:00

vsockmon.c

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xen-netfront.c

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