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authorJiri Bohac <jbohac@suse.cz>2007-02-08 16:02:21 -0800
committerDavid S. Miller <davem@davemloft.net>2007-02-08 16:02:21 -0800
commit1539b98b561754252dd520b98fa03a688a4f81b5 (patch)
tree4121f7c5d25d6008a919dd5ec92b29990a49d6f9 /net/ipx
parent42c05f6e6e3d57495054a4cae35850b3f7d1c343 (diff)
[IPX]: Fix NULL pointer dereference on ipx unload
Fixes a null pointer dereference when unloading the ipx module. On initialization of the ipx module, registering certain packet types can fail. When this happens, unloading the module later dereferences NULL pointers. This patch fixes that. Please apply. Signed-off-by: Jiri Bohac <jbohac@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipx')
-rw-r--r--net/ipx/af_ipx.c24
1 files changed, 16 insertions, 8 deletions
diff --git a/net/ipx/af_ipx.c b/net/ipx/af_ipx.c
index 76c661566dfd..89f283c51dff 100644
--- a/net/ipx/af_ipx.c
+++ b/net/ipx/af_ipx.c
@@ -2035,19 +2035,27 @@ static void __exit ipx_proto_finito(void)
ipxitf_cleanup();
- unregister_snap_client(pSNAP_datalink);
- pSNAP_datalink = NULL;
+ if (pSNAP_datalink) {
+ unregister_snap_client(pSNAP_datalink);
+ pSNAP_datalink = NULL;
+ }
- unregister_8022_client(p8022_datalink);
- p8022_datalink = NULL;
+ if (p8022_datalink) {
+ unregister_8022_client(p8022_datalink);
+ p8022_datalink = NULL;
+ }
dev_remove_pack(&ipx_8023_packet_type);
- destroy_8023_client(p8023_datalink);
- p8023_datalink = NULL;
+ if (p8023_datalink) {
+ destroy_8023_client(p8023_datalink);
+ p8023_datalink = NULL;
+ }
dev_remove_pack(&ipx_dix_packet_type);
- destroy_EII_client(pEII_datalink);
- pEII_datalink = NULL;
+ if (pEII_datalink) {
+ destroy_EII_client(pEII_datalink);
+ pEII_datalink = NULL;
+ }
proto_unregister(&ipx_proto);
sock_unregister(ipx_family_ops.family);

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