diff options
| author | Eduardo Blanco <ejblanco@google.com> | 2010-10-19 10:26:47 +0100 |
|---|---|---|
| committer | Simon Horman <horms@verge.net.au> | 2010-10-19 17:13:16 +0200 |
| commit | d86bef73b4a24e59e7c1f896a72bbf38430ac2c6 (patch) | |
| tree | 724097038b8d5bf76da75b55af13de23b46365f1 /net | |
| parent | 714f095f74582764d629785f03b459a3d0503624 (diff) | |
Fixed race condition at ip_vs.ko module init.
Lists were initialized after the module was registered. Multiple ipvsadm
processes at module load triggered a race condition that resulted in a null
pointer dereference in do_ip_vs_get_ctl(). As a result, __ip_vs_mutex
was left locked preventing all further ipvsadm commands.
Signed-off-by: Eduardo J. Blanco <ejblanco@google.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/ipvs/ip_vs_ctl.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c index a697591d0e23..0b884d3e192f 100644 --- a/net/netfilter/ipvs/ip_vs_ctl.c +++ b/net/netfilter/ipvs/ip_vs_ctl.c @@ -3400,6 +3400,16 @@ int __init ip_vs_control_init(void) EnterFunction(2); + /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */ + for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { + INIT_LIST_HEAD(&ip_vs_svc_table[idx]); + INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]); + } + for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) { + INIT_LIST_HEAD(&ip_vs_rtable[idx]); + } + smp_wmb(); + ret = nf_register_sockopt(&ip_vs_sockopts); if (ret) { pr_err("cannot register sockopt.\n"); @@ -3418,15 +3428,6 @@ int __init ip_vs_control_init(void) sysctl_header = register_sysctl_paths(net_vs_ctl_path, vs_vars); - /* Initialize ip_vs_svc_table, ip_vs_svc_fwm_table, ip_vs_rtable */ - for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { - INIT_LIST_HEAD(&ip_vs_svc_table[idx]); - INIT_LIST_HEAD(&ip_vs_svc_fwm_table[idx]); - } - for(idx = 0; idx < IP_VS_RTAB_SIZE; idx++) { - INIT_LIST_HEAD(&ip_vs_rtable[idx]); - } - ip_vs_new_estimator(&ip_vs_stats); /* Hook the defense timer */ |