Date: Sun, 26 Oct 1997 10:47:33 -0800 (PST) From: Bill Paul <wpaul@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-lib@FreeBSD.ORG Subject: cvs commit: src/lib/libc/rpc clnt_udp.c Message-ID: <199710261847.KAA00421@freefall.freebsd.org>
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wpaul 1997/10/26 10:47:32 PST Modified files: lib/libc/rpc clnt_udp.c Log: In clntudp_call(), it is possible that xdr_replymsg() might fail partway through its attempt to decode the result structure sent by the server. If this happens, it can leave the result partially populated with dynamically allocated memory. In this event, the xdr_replymsg() failure is detected and RPC_CANTDECODERES is returned, but the memory in the partially populated result struct is not free()d. The end result is that memory is leaked when an RPC_CANTDECODERES error occurs. (This condition can occur if a CLIENT * handle is created using clntudp_bufcreate() with a receive buffer size that is too small to handle the result sent by the server.) Fixed by setting reply_xdrs.x_op to XDR_FREE and calling xdr_replymsg() again to free the memory if an RPC_CANTDECODERES error is detected. I suspect that the clnt_tcp.c, clnt_unix.c and clnt_raw.c modules may ha a similar problem, but I haven't duplicated the condition with those yet. Found by: dbmalloc Revision Changes Path 1.12 +14 -0 src/lib/libc/rpc/clnt_udp.c
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