[PATCH 5.10.y 0/2] can: isotp: backport of 2 patches that failed to apply to 5.10-stable

[Oliver Hartkopp <socketcan@hartkopp.net>]

This resubmits "can: isotp: fix use-after-free race with concurrent
NETDEV_UNREGISTER" (commit 20bab8b88baac140ca3701116e1d486c7f51e311
upstream), which failed to apply to the 5.10-stable tree, together
with "can: isotp: serialize TX state transitions under so->rx_lock"
(commit cf070fe33bfbd1a4c21236078fadb35dd223a157 upstream) from the
same upstream series, which builds on it and would otherwise fail
for the same reason. This is the full set of 3 upstream isotp.c
patches from 7.2-rc3 minus the 1 already queued by the normal stable
process for 5.10 ("can: isotp: use unconditional synchronize_rcu()
in isotp_release()").

This assumes the 1 already-queued isotp.c patch for 5.10-stable has
landed by the time this is applied. If not, please let me know and I
will rebase.

Oliver Hartkopp (2):
  can: isotp: fix use-after-free race with concurrent NETDEV_UNREGISTER
  can: isotp: serialize TX state transitions under so->rx_lock

 net/can/isotp.c | 280 ++++++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 213 insertions(+), 67 deletions(-)

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2.43.0