在 2022/5/6 下午1:22, D. Wythe 写道:
From: "D. Wythe" <alibuda@xxxxxxxxxxxxxxxxx>
The following scenarios exist:
lnk->refcnt=1;
smcr_link_put(lnk);
lnk->refcnt=0;
smcr_link_hold(lnk);
__smcr_link_clear(lnk);
do_xxx(lnk);
This patch try using refcount_inc_not_zero() instead refcount_inc()
to prevent this race condition. Therefore, we need to always check its
return value, and respond with an error when it fails.
Fixes: 20c9398d3309 ("net/smc: Resolve the race between SMC-R link access and clear")
Signed-off-by: D. Wythe <alibuda@xxxxxxxxxxxxxxxxx>
Wrong subject prefix here, please ignore this patch, we will send
another revison later.
Thanks.
D. Wythe
