From: Pravin B Shelar <pshe...@nicira.com>
Flow alloc needs to initialize unmasked key pointer. Otherwise
it can crash kernel trying to free random unmasked-key pointer.
general protection fault: 0000 [#1] SMP
3.19.0-rc6-net-next+ #457
Hardware name: Supermicro X7DWU/X7DWU, BIOS 1.1 04/30/2008
RIP: 0010:[<ffffffff8111df0e>] [<ffffffff8111df0e>] kfree+0xac/0x196
Call Trace:
[<ffffffffa060bd87>] flow_free+0x21/0x59 [openvswitch]
[<ffffffffa060bde0>] ovs_flow_free+0x21/0x23 [openvswitch]
[<ffffffffa0605b4a>] ovs_packet_cmd_execute+0x2f3/0x35f [openvswitch]
[<ffffffffa0605995>] ? ovs_packet_cmd_execute+0x13e/0x35f [openvswitch]
[<ffffffff811fe6fb>] ? nla_parse+0x4f/0xec
[<ffffffff8139a2fc>] genl_family_rcv_msg+0x26d/0x2c9
[<ffffffff8107620f>] ? __lock_acquire+0x90e/0x9aa
[<ffffffff8139a3be>] genl_rcv_msg+0x66/0x89
[<ffffffff8139a358>] ? genl_family_rcv_msg+0x2c9/0x2c9
[<ffffffff81399591>] netlink_rcv_skb+0x3e/0x95
[<ffffffff81399898>] ? genl_rcv+0x18/0x37
[<ffffffff813998a7>] genl_rcv+0x27/0x37
[<ffffffff81399033>] netlink_unicast+0x103/0x191
[<ffffffff81399382>] netlink_sendmsg+0x2c1/0x310
[<ffffffff811007ad>] ? might_fault+0x50/0xa0
[<ffffffff8135c773>] do_sock_sendmsg+0x5f/0x7a
[<ffffffff8135c799>] sock_sendmsg+0xb/0xd
[<ffffffff8135cacf>] ___sys_sendmsg+0x1a3/0x218
[<ffffffff8113e54b>] ? get_close_on_exec+0x86/0x86
[<ffffffff8115a9d0>] ? fsnotify+0x32c/0x348
[<ffffffff8115a720>] ? fsnotify+0x7c/0x348
[<ffffffff8113e5f5>] ? __fget+0xaa/0xbf
[<ffffffff8113e54b>] ? get_close_on_exec+0x86/0x86
[<ffffffff8135cccd>] __sys_sendmsg+0x3d/0x5e
[<ffffffff8135cd02>] SyS_sendmsg+0x14/0x16
[<ffffffff81411852>] system_call_fastpath+0x12/0x17
Reported-by: Or Gerlitz <ogerl...@mellanox.com>
Signed-off-by: Pravin B Shelar <pshe...@nicira.com>
---
datapath/flow_table.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/datapath/flow_table.c b/datapath/flow_table.c
index 311e5ee..9a27bea 100644
--- a/datapath/flow_table.c
+++ b/datapath/flow_table.c
@@ -92,6 +92,8 @@ struct sw_flow *ovs_flow_alloc(void)
flow->sf_acts = NULL;
flow->mask = NULL;
+ flow->id.ufid_len = 0;
+ flow->id.unmasked_key = NULL;
flow->stats_last_writer = NUMA_NO_NODE;
/* Initialize the default stat node. */
--
1.7.10.4
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