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(-) -- 1.8.3.1
