[RFC PATCH net v2 0/2] net/smc: Fix for race in smc link group termination

Wen Gu
2021-12-28T15:14:20Z

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

v1->v2
- Declare __smcr_link_clear() as 'static'

Best wishes,
Wen Gu

Wen Gu (2):
net/smc: Resolve the race between link group access and termination
net/smc: Resolve the race between SMC-R link access and clear

net/smc/smc.h | 1 +
net/smc/smc_core.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++------
net/smc/smc_core.h | 7 +++++
3 files changed, 79 insertions(+), 9 deletions(-)

--
1.8.3.1