Messages in this thread | | | Date | Wed, 14 Dec 2005 20:40:32 -0800 | From | Andrew Morton <> | Subject | Re: [RFC][PATCH] Prevent overriding of Symbols in the Kernel, avoiding Undefined behaviour |
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Ashutosh Naik <ashutosh.naik@gmail.com> wrote: > > This patch ensures that an exported symbol does not already exist in > the kernel or in some other module's exported symbol table. This is > done by checking the symbol tables for the exported symbol at the time > of loading the module. Currently this is done after the relocation of > the symbol.
This patch causes weird things to happen on ppc64.
The only module which is loaded is autofs, and I assume this happens when autofs is (successfully) loaded. But unloading autofs and reloading autofs does not cause a repeat.
kjournald starting. Commit interval 5 seconds EXT3 FS on sda6, internal journal EXT3-fs: mounted filesystem with ordered data mode. tg3: eth0: Link is up at 100 Mbps, full duplex. tg3: eth0: Flow control is off for TX and off for RX. sunrpc: exports duplicate symbol rpc_max_payload (owned by autofs) lockd: Unknown symbol svc_recv lockd: Unknown symbol svc_create lockd: Unknown symbol rpciod_up lockd: Unknown symbol rpc_destroy_client lockd: Unknown symbol xdr_encode_netobj lockd: Unknown symbol svc_destroy lockd: Unknown symbol xprt_create_proto lockd: Unknown symbol rpc_delay lockd: Unknown symbol rpc_call_async lockd: Unknown symbol rpc_create_client lockd: Unknown symbol svc_makesock lockd: Unknown symbol nlm_debug lockd: Unknown symbol xdr_decode_netobj lockd: Unknown symbol svc_wake_up lockd: Unknown symbol rpciod_down lockd: Unknown symbol svc_exit_thread lockd: Unknown symbol xdr_encode_string lockd: Unknown symbol rpc_call_sync lockd: Unknown symbol xdr_decode_string_inplace lockd: Unknown symbol svc_set_client lockd: Unknown symbol svc_process lockd: Unknown symbol xprt_set_timeout lockd: Unknown symbol rpc_restart_call lockd: Unknown symbol svc_create_thread exportfs: exports duplicate symbol find_exported_dentry (owned by autofs) sunrpc: exports duplicate symbol rpc_max_payload (owned by autofs) lockd: Unknown symbol svc_recv lockd: Unknown symbol svc_create lockd: Unknown symbol rpciod_up lockd: Unknown symbol rpc_destroy_client lockd: Unknown symbol xdr_encode_netobj lockd: Unknown symbol svc_destroy lockd: Unknown symbol xprt_create_proto lockd: Unknown symbol rpc_delay lockd: Unknown symbol rpc_call_async lockd: Unknown symbol rpc_create_client lockd: Unknown symbol svc_makesock lockd: Unknown symbol nlm_debug lockd: Unknown symbol xdr_decode_netobj lockd: Unknown symbol svc_wake_up lockd: Unknown symbol rpciod_down lockd: Unknown symbol svc_exit_thread lockd: Unknown symbol xdr_encode_string lockd: Unknown symbol rpc_call_sync lockd: Unknown symbol xdr_decode_string_inplace lockd: Unknown symbol svc_set_client lockd: Unknown symbol svc_process lockd: Unknown symbol xprt_set_timeout lockd: Unknown symbol rpc_restart_call lockd: Unknown symbol svc_create_thread exportfs: exports duplicate symbol find_exported_dentry (owned by autofs) nfsd: Unknown symbol cache_flush nfsd: Unknown symbol find_exported_dentry nfsd: Unknown symbol rpcauth_lookup_credcache nfsd: Unknown symbol svc_proc_register nfsd: Unknown symbol cache_register nfsd: Unknown symbol svc_recv nfsd: Unknown symbol svc_create nfsd: Unknown symbol svcauth_unix_purge nfsd: Unknown symbol rpciod_up nfsd: Unknown symbol xdr_encode_opaque nfsd: Unknown symbol xdr_reserve_space nfsd: Unknown symbol svc_destroy nfsd: Unknown symbol cache_fresh nfsd: Unknown symbol auth_domain_put nfsd: Unknown symbol xdr_inline_decode nfsd: Unknown symbol xprt_create_proto nfsd: Unknown symbol nfsd_debug nfsd: Unknown symbol rpc_call_async nfsd: Unknown symbol svc_makesock nfsd: Unknown symbol auth_unix_lookup nfsd: Unknown symbol svc_seq_show nfsd: Unknown symbol unix_domain_find nfsd: Unknown symbol auth_unix_forget_old nfsd: Unknown symbol svc_proc_unregister nfsd: Unknown symbol auth_unix_add_addr nfsd: Unknown symbol cache_init nfsd: Unknown symbol qword_get nfsd: Unknown symbol rpc_shutdown_client nfsd: Unknown symbol rpciod_down nfsd: Unknown symbol put_rpccred nfsd: Unknown symbol svc_exit_thread nfsd: Unknown symbol svc_set_client nfsd: Unknown symbol lockd_down nfsd: Unknown symbol xdr_init_decode nfsd: Unknown symbol cache_unregister nfsd: Unknown symbol qword_add nfsd: Unknown symbol lockd_up nfsd: Unknown symbol nlmsvc_ops nfsd: Unknown symbol xdr_init_encode nfsd: Unknown symbol rpc_call_sync nfsd: Unknown symbol export_op_default nfsd: Unknown symbol xdr_decode_string_inplace nfsd: Unknown symbol rpc_new_client nfsd: Unknown symbol svc_process nfsd: Unknown symbol svc_reserve nfsd: Unknown symbol cache_purge nfsd: Unknown symbol cache_check nfsd: Unknown symbol qword_addhex nfsd: Unknown symbol svc_create_thread nfsd: Unknown symbol auth_domain_find sunrpc: exports duplicate symbol rpc_max_payload (owned by autofs) eth0: no IPv6 routers present
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