projects / platform / kernel / linux-exynos.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: ae3fb6d) | patch
xfrm: state: use atomic_inc_not_zero to increment refcount
authorFlorian Westphal <fw@strlen.de>
Tue, 9 Aug 2016 10:16:05 +0000 (12:16 +0200)
committerSteffen Klassert <steffen.klassert@secunet.com>
Wed, 10 Aug 2016 09:23:23 +0000 (11:23 +0200)
commit02efdff7e209859c2755ebe93b3bd0e3d40123ab
treed7008910ee8bc52787e18eda78733c31ea44ba39tree | snapshot
parentae3fb6d32140e5c5b491892105ca89066171d217commit | diff
xfrm: state: use atomic_inc_not_zero to increment refcount

Once xfrm_state_lookup_byaddr no longer acquires the state lock another
cpu might be freeing the state entry at the same time.

To detect this we use atomic_inc_not_zero, we then signal -EAGAIN to
caller in case our result was stale.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
net/xfrm/xfrm_state.c diff | blob | history
Domain: System / Kernel;