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[net,0/4] net-sysfs: fix race conditions in the xps code

Message ID 20201217162521.1134496-1-atenart@kernel.org (mailing list archive)
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Series net-sysfs: fix race conditions in the xps code | expand

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Antoine Tenart Dec. 17, 2020, 4:25 p.m. UTC 
Hello all,

This series fixes two similar issues, one with xps_cpus and one with
xps_rxqs, where a race condition can occur between accesses to the
xps_cpus and xps_rxqs maps and the update of dev->num_tc. Those races
lead to accesses outside of the map and oops being triggered. An
explanation is given in each of the commit logs.

Thanks!
Antoine

Antoine Tenart (4):
  net-sysfs: take the rtnl lock when storing xps_cpus
  net-sysfs: take the rtnl lock when accessing xps_cpus_map and num_tc
  net-sysfs: take the rtnl lock when storing xps_rxqs
  net-sysfs: take the rtnl lock when accessing xps_rxqs_map and num_tc

 net/core/net-sysfs.c | 65 ++++++++++++++++++++++++++++++++++++--------
 1 file changed, 53 insertions(+), 12 deletions(-)