Red Hat Bugzilla – Bug 481114
Interesting gcc? problem / compiling pure-ftpd / released pure-ftpd has the same bug
Last modified: 2009-12-18 02:40:22 EST
Description of problem: Pure-FTPd PORT error on Fedora 10, tests shows that this problem only persists on X86_64 machines, but this is not cerified yet. Connecting to a pure server fails in active mode, after port command it starts to connect to a bad host/port, 0.0.0.0 It seems, the do_port function doesn't work. Version-Release number of selected component (if applicable): Fedora 10 How reproducible: Install Pure-FTPd on Fedora 10 x86_64, try to connect it it will fail after FTP PORT command. Actual results: The same problem persists with compiled pure-ftpd too. As we tested an interesting modifications solves the problem: int uselessvariable; void doport(const char *arg) { unsigned int a1, a2, a3, a4, p1, p2; struct sockaddr_storage a; uselessvariable=1; if (6 != sscanf(arg, "%u,%u,%u,%u,%u,%u", &a1, &a2, &a3, &a4, &p1, &p2) || a1 > 255 || a2 > 255 || a3 > 255 || a4 > 255 || p1 > 255 || p2 > 255 || (a1|a2|a3|a4) == 0 || (p1|p2) == 0) { addreply_noformat(501, MSG_SYNTAX_ERROR_IP); return; } memset(&a, 0, sizeof a); STORAGE_FAMILY(a) = AF_INET; STORAGE_SIN_ADDR(a) = htonl((a1 << 24) | (a2 << 16) | (a3 << 8) | a4); SET_STORAGE_LEN(a, sizeof(struct sockaddr_in)); doport2(a, (p1 << 8) | p2); } If I just access a variable outside the function the function starts to work? Is this a gcc or libc problem?
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Fedora 10 changed to end-of-life (EOL) status on 2009-12-17. Fedora 10 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.