[Bug libc/3158] New: Problem with realloc

["nico-linux-glibc at schottelius dot org" <sourceware-bugzilla at sourceware dot org>]

I am not sure, whether this is a glibc bug, I only see that it works on other
libcs (for instance on FreeBSD).

Output of my program:
[14:32] hydrogenium:tcpserver_blocker% ./out/tcpserver_analyzer ./test 1000000
20 40 60 --  192.1.2.4 192.168.2.54
20
40
60
*** glibc detected *** realloc(): invalid next size: 0x0804b018 ***
zsh: abort      ./out/tcpserver_analyzer ./test 1000000 20 40 60 -- 192.1.2.4
192.168.2.54

Output using gdb:

(gdb) set args ./test 1000000 20 40 60 --  192.1.2.4 192.168.2.54
(gdb) run
Starting program:
/home/user/nico/oeffentlich/computer/projekte/tcpserver_blocker/out/tcpserver_analyzer
./test 1000000 20 40 60 --  192.1.2.4 192.168.2.54
20
40
60
*** glibc detected *** realloc(): invalid next size: 0x0804b018 ***

Program received signal SIGABRT, Aborted.
0xb7e809e7 in raise () from /lib/tls/libc.so.6
(gdb) where
#0  0xb7e809e7 in raise () from /lib/tls/libc.so.6
#1  0xb7e82159 in abort () from /lib/tls/libc.so.6
#2  0xb7eb624a in __fsetlocking () from /lib/tls/libc.so.6
#3  0xb7ebfa17 in valloc () from /lib/tls/libc.so.6
#4  0xb7ec0325 in realloc () from /lib/tls/libc.so.6
#5  0x08048815 in do_argv (argc=9, argv=0xbfadfd70) at analyzer/do_argv.c:66
#6  0x0804896f in main (argc=9, argv=0xbfadfd54) at analyzer/main.c:18
(gdb) 

The relevant source files can be found at

http://home.schottelius.org/~nico/temp/do_argv.c
http://home.schottelius.org/~nico/temp/analyzer.h

I do not hope that it is a programming mistake, but I and some other
guys did not see it in that case.

-- 
           Summary: Problem with realloc
           Product: glibc
           Version: 2.3.6
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: nico-linux-glibc at schottelius dot org
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=3158

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