[PATCH] flowcache: Fix kernel panic in flow_cache_flush_task

From: Miroslav Urbanek
Date: Thu Feb 05 2015 - 10:45:46 EST


flow_cache_flush_task references a structure member flow_cache_gc_work
where it should reference flow_cache_flush_task instead.

Kernel panic occurs on kernels using IPsec during XFRM garbage
collection. The garbage collection interval can be shortened using the
following sysctl settings:

net.ipv4.xfrm4_gc_thresh=4
net.ipv6.xfrm6_gc_thresh=4

With the default settings, our productions servers crash approximately
once a week. With the settings above, they crash immediately.

Fixes: ca925cf1534e ("flowcache: Make flow cache name space aware")
Reported-by: TomÃÅ CharvÃt <tc@xxxxxxxxxx>
Tested-by: Jan Hejl <jh@xxxxxxxxxx>
Signed-off-by: Miroslav Urbanek <mu@xxxxxxxxxxxxxxxxxxx>
---
net/core/flow.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/flow.c b/net/core/flow.c
index a0348fd..1033725 100644
--- a/net/core/flow.c
+++ b/net/core/flow.c
@@ -379,7 +379,7 @@ done:
static void flow_cache_flush_task(struct work_struct *work)
{
struct netns_xfrm *xfrm = container_of(work, struct netns_xfrm,
- flow_cache_gc_work);
+ flow_cache_flush_work);
struct net *net = container_of(xfrm, struct net, xfrm);

flow_cache_flush(net);
--
2.0.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/