On Sat, Nov 1, 2008 at 4:08 PM, Ian Kent <[EMAIL PROTECTED]> wrote:
> Get gdb output with "thr a a bt"
gdb does not give me any useful output even when I make with DEBUG=1,
so I used valgrind's memcheck instead.
==32474== Process terminating with default action of signal 11
(SIGSEGV): dumping core
==32474== Bad permissions for mapped region at address 0xFE2FFFFC
==32474== at 0x4C95507: __errno_location (errno-loc.c:36)
==32474== by 0x4CBAC2A: vfprintf (vfprintf.c:222)
==32474== by 0x4CD5EB7: vsprintf (iovsprintf.c:46)
==32474== by 0x4CC37AA: sprintf (sprintf.c:34)
==32474== by 0x157E6: lookup_ghost (lookup.c:616)
==32474== by 0xB74C: mount_autofs_indirect (indirect.c:215)
==32474== by 0x8718: mount_autofs (automount.c:1068)
==32474== by 0x9FA7: handle_mounts (automount.c:1556)
==32474== by 0x4BE7CAB: pthread_start_thread (manager.c:310)
==32474== by 0x4D39129: clone (clone.S:119)
daemon/lookup.c:
598 me = cache_enumerate(mc, NULL);
599 while (me) {
...
611 fullpath = alloca(strlen(me->key) +
strlen(root) + 3);
612 if (!fullpath) {
613 warn(ap->logopt, "failed to
allocate full path");
614 goto next;
615 }
616 sprintf(fullpath, "%s/%s", root, me->key);
...
637 next:
638 me = cache_enumerate(mc, me);
639 }
alloca(3) does not return NULL. After some number of iterations, you
overflow the stack.
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