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| author | Zigit Zo <zuozhijie@bytedance.com> | 2025-07-16 19:57:17 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-24 08:58:39 +0200 |
| commit | 3859f137b3c1fa1f0031d54263234566bdcdd7aa (patch) | |
| tree | 13754f4fa9f0fa6fe395f2cef0e2ace9d9e4d6da /tools/perf/scripts/python/stackcollapse.py | |
| parent | 4bd2795f93abb919ff4b26f2ded3693970637097 (diff) | |
| download | kernel-3859f137b3c1fa1f0031d54263234566bdcdd7aa.tar.gz | |
virtio-net: fix recursived rtnl_lock() during probe()
[ Upstream commit be5dcaed694e4255dc02dd0acfe036708c535def ]
The deadlock appears in a stack trace like:
virtnet_probe()
rtnl_lock()
virtio_config_changed_work()
netdev_notify_peers()
rtnl_lock()
It happens if the VMM sends a VIRTIO_NET_S_ANNOUNCE request while the
virtio-net driver is still probing.
The config_work in probe() will get scheduled until virtnet_open() enables
the config change notification via virtio_config_driver_enable().
Fixes: df28de7b0050 ("virtio-net: synchronize operstate with admin state on up/down")
Signed-off-by: Zigit Zo <zuozhijie@bytedance.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://patch.msgid.link/20250716115717.1472430-1-zuozhijie@bytedance.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions