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[IPX]: Fix NULL pointer dereference on ipx unload

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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>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
This commit is contained in:
Jiri Bohac
2007-02-14 09:40:31 +01:00
committed by Adrian Bunk
parent 587d7ce100
commit 844affa574
1 changed files with 16 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
net/ipx/af_ipx.c
+16 -8
View File
@@ -2010,19 +2010,27 @@ 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);