net-sysfs: take the rtnl lock when accessing xps_cpus_map and num_tc

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[ Upstream commit fb25038586 ]

Accesses to dev->xps_cpus_map (when using dev->num_tc) should be
protected by the rtnl lock, like we do for netif_set_xps_queue. I didn't
see an actual bug being triggered, but let's be safe here and take the
rtnl lock while accessing the map in sysfs.

Fixes: 184c449f91 ("net: Add support for XPS with QoS via traffic classes")
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Antoine Tenart 2020-12-23 22:23:21 +01:00 • committed by Greg Kroah-Hartman

parent 4da25d83b7

commit 0ca897c1ec

1 changed files with 22 additions and 7 deletions

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net/core/net-sysfs.c

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