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Fix IPX module unload

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[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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jiri Bohac
2007-02-13 18:19:47 -08:00
committed by Greg Kroah-Hartman
parent 26e2080a00
commit e8c72f47cc
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
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@@ -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);