Author: lstewart
Date: Tue Aug 19 02:19:53 2014
New Revision: 270160
URL: http://svnweb.freebsd.org/changeset/base/270160
Log:
Destroy the "qdiffsample_zone" UMA zone on unload to avoid a use-after-unload
panic easily triggered by running "sysctl -a" after unload.
Reported and tested by: Grenville Armitage <garmit...@swin.edu.au>
MFC after: 1 week
Modified:
head/sys/netinet/cc/cc_cdg.c
Modified: head/sys/netinet/cc/cc_cdg.c
==============================================================================
--- head/sys/netinet/cc/cc_cdg.c Tue Aug 19 01:20:24 2014
(r270159)
+++ head/sys/netinet/cc/cc_cdg.c Tue Aug 19 02:19:53 2014
(r270160)
@@ -221,6 +221,7 @@ static VNET_DEFINE(uint32_t, cdg_hold_ba
/* Function prototypes. */
static int cdg_mod_init(void);
+static int cdg_mod_destroy(void);
static void cdg_conn_init(struct cc_var *ccv);
static int cdg_cb_init(struct cc_var *ccv);
static void cdg_cb_destroy(struct cc_var *ccv);
@@ -234,7 +235,8 @@ struct cc_algo cdg_cc_algo = {
.cb_destroy = cdg_cb_destroy,
.cb_init = cdg_cb_init,
.conn_init = cdg_conn_init,
- .cong_signal = cdg_cong_signal
+ .cong_signal = cdg_cong_signal,
+ .mod_destroy = cdg_mod_destroy
};
/* Vnet created and being initialised. */
@@ -278,6 +280,14 @@ cdg_mod_init(void)
}
static int
+cdg_mod_destroy(void)
+{
+
+ uma_zdestroy(qdiffsample_zone);
+ return (0);
+}
+
+static int
cdg_cb_init(struct cc_var *ccv)
{
struct cdg *cdg_data;
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