Date: Thu, 24 Jul 1997 13:25:25 -0700 (PDT) From: archie@whistle.com To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: bin/4163: ftp core dump Message-ID: <199707242025.NAA07529@bubba.whistle.com> Resent-Message-ID: <199707242030.NAA22283@hub.freebsd.org>
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>Number: 4163 >Category: bin >Synopsis: ftp core dumps after hitting control-C >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Jul 24 13:30:01 PDT 1997 >Last-Modified: >Originator: Archie Cobbs >Organization: Whistle Communications, Inc. >Release: FreeBSD 2.2-STABLE i386 >Environment: FreeBSD 2.2 branch as of approx. July 20, 1997 >Description: Did a file transfer, enabling hash marks first. Seemed to finish (no more data was being sent and remote had closed the connection) but my local side didn't return a prompt. I hit control-C and got a core dump: ########### ^C receive aborted waiting for remote to finish abort ftp: abort: Broken pipe Segmentation fault (core dumped) Here's why -- variable "cout" is NULL: Core was generated by `ftp'. Program terminated with signal 11, Segmentation fault. #0 0x806d01a in ?? () (gdb) where #0 0x806d01a in ?? () #1 0x8080060 in ?? () #2 0x806cbaf in ?? () #3 0x8e58 in abort_remote (din=0x809054c) at ftp.c:1513 #4 0x7bf0 in recvrequest (cmd=0x2596 "", local=0x16050 "", remote=0x13f2c "", lmode=0x2507 "", printnames=1) at ftp.c:978 #5 0x2953 in getit (argc=3, argv=0x14430, restartit=0, mode=0x2507 "") at cmds.c:686 #6 0x253b in get (argc=3, argv=0x14430) at cmds.c:579 #7 0x9608 in cmdscanner (top=1) at main.c:289 #8 0x934a in main (argc=1, argv=0xefbfd8e4) at main.c:177 (gdb) up 4 #4 0x7bf0 in recvrequest (cmd=0x2596 "", local=0x16050 "", remote=0x13f2c "", lmode=0x2507 "", printnames=1) at ftp.c:978 ftp.c:978: No such file or directory. (gdb) down #3 0x8e58 in abort_remote (din=0x809054c) at ftp.c:1513 ftp.c:1513: No such file or directory. (gdb) p cout $1 = (FILE *) 0x0 Relevant source code snippet from ftp.c: 1498 void 1499 abort_remote(din) 1500 FILE *din; 1501 { 1502 char buf[BUFSIZ]; 1503 int nfnd; 1504 struct fd_set mask; 1505 1506 /* 1507 * send IAC in urgent mode instead of DM because 4.3BSD places o ob mark 1508 * after urgent byte rather than before as is protocol now 1509 */ 1510 sprintf(buf, "%c%c%c", IAC, IP, IAC); 1511 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 1512 warn("abort"); 1513 fprintf(cout,"%cABOR\r\n", DM); <--- core dump here 1514 (void) fflush(cout); 1515 FD_ZERO(&mask); 1516 FD_SET(fileno(cin), &mask); 1517 if (din) { 1518 FD_SET(fileno(din), &mask); 1519 } >How-To-Repeat: Do what I described, I guess... >Fix: Dunno. >Audit-Trail: >Unformatted:
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