[PATCH net 0/3] net/smc: Fixes for race in smc link group termination

Wen Gu
2022-01-10T09:27:03Z

We encountered some crashes recently and they are caused by the
race between the access and free of link/link group in abnormal
smc link group termination. The crashes can be reproduced in
frequent abnormal link group termination, like setting RNICs up/down.

This set of patches tries to fix this by extending the life cycle
of link/link group to ensure that they won't be referred to after
cleared or freed.

Wen Gu (3):
net/smc: Resolve the race between link group access and termination
net/smc: Introduce a new conn->lgr validity check helper
net/smc: Resolve the race between SMC-R link access and clear

net/smc/af_smc.c | 6 +++-
net/smc/smc.h | 1 +
net/smc/smc_cdc.c | 3 +-
net/smc/smc_clc.c | 2 +-
net/smc/smc_core.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++--------
net/smc/smc_core.h | 12 +++++++
net/smc/smc_diag.c | 6 ++--
7 files changed, 104 insertions(+), 20 deletions(-)

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1.8.3.1