net/smc: prevent races between smc_lgr_terminate() and smc_conn_free()

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To prevent races between smc_lgr_terminate() and smc_conn_free() add an
extra check of the lgr field before accessing it, and cancel a delayed
free_work when a new smc connection is created.
This fixes the problem that free_work cleared the lgr variable but
smc_lgr_terminate() or smc_conn_free() still access it in parallel.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Karsten Graul 2019-01-30 18:51:02 +01:00 • committed by David S. Miller

parent ca8dc1334a

commit 77f838ace7

1 changed files with 4 additions and 0 deletions

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net/smc/smc_core.c

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