(gdb) bt full #0 0xf7784ba0 in __kernel_vsyscall () No symbol table info available. #1 0xf7553057 in __GI_raise (sig=6) at ../sysdeps/unix/sysv/linux/raise.c:55 resultvar = resultvar = pid = -143794176 selftid = 15521 #2 0xf7554699 in __GI_abort () at abort.c:89 save_stage = 2 act = {__sigaction_handler = {sa_handler = 0x3bfa7627, sa_sigaction = 0x3bfa7627}, sa_mask = {__val = {4149391060, 4149429364, 0, 0, 4151971712, 4292550960, 0, 0, 4152003312, 4292551064, 4151892857, 4152000512, 4152003312, 4292551080, 4292551152, 4151892760, 4149452894, 134517214, 4292551080, 4152003220, 2, 4148463304, 1, 225011984, 1, 0, 3, 4096, 4150314888, 4096, 96, 4151173120}}, sa_flags = -2415864, sa_restorer = 0xf7591118 <__libc_message+520>} sigs = {__val = {32, 0 }} #3 0xf759119e in __libc_message (do_abort=1, fmt=0xf768b444 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175 ap = fd = on_2 = list = nlist = cp = written = #4 0xf7596de7 in malloc_printerr (action=, str=0xf7687583 "free(): invalid pointer", ptr=0x86d9c60) at malloc.c:4965 buf = "086d9c60" cp = #5 0xf759754d in _int_free (av=0xf76de840 , p=, have_lock=0) at malloc.c:3834 size = fb = nextchunk = nextsize = nextinuse = prevsize = bck = fwd = errstr = locked = __func__ = "_int_free" #6 0x080aa568 in grub_free (ptr=0x86d9c60) at grub-core/kern/emu/mm.c:53 No locals. #7 0x0804de4f in free_menu (menu=0xffdb2460) at grub-core/lib/syslinux_parse.c:1354 say = 0x86d9c58 nsay = 0x0 entry = 0x86d9bd0 nentry = 0x14 ---Type to continue, or q to quit--- #8 0x0804e474 in config_file (outbuf=0xffdb2500, root=0x86dabf0 "(host)//", target_root=0x80caebf "/", cwd=0x86dacf8 "(host)//tmp", target_cwd=0x86d9a30 "/tmp", fname=0x86daae8 "(host)//tmp/syslinux.cfg", parent=0x0, flav=GRUB_SYSLINUX_UNKNOWN) at grub-core/lib/syslinux_parse.c:1482 err = GRUB_ERR_NONE menu = {parent = 0x0, entries = 0x0, def = 0x0, comments = 0x0, background = 0x0, root_read_directory = 0x86dabf0 "(host)//", root_target_directory = 0x80caebf "/", current_read_directory = 0x86dacf8 "(host)//tmp", current_target_directory = 0x86d9a30 "/tmp", filename = 0x86daae8 "(host)//tmp/syslinux.cfg", commentslen = 0, timeout = 0, say = 0x86d9c58, flavour = GRUB_SYSLINUX_UNKNOWN} curentry = 0x3 lentry = 0x0 say = 0x86d9c58 #9 0x0804e4f0 in grub_syslinux_config_file (base=0x86dabf0 "(host)//", target_base=0x80caebf "/", cwd=0x86dacf8 "(host)//tmp", target_cwd=0x86d9a30 "/tmp", fname=0x86daae8 "(host)//tmp/syslinux.cfg", flav=GRUB_SYSLINUX_UNKNOWN) at grub-core/lib/syslinux_parse.c:1493 outbuf = {alloc = 0, ptr = 0, buf = 0x0} err = 134912946 #10 0x0804a4b2 in main (argc=2, argv=0xffdb2674) at util/grub-syslinux2cfg.c:219 arguments = {input = 0x86d9a50 "/tmp/syslinux.cfg", root = 0x0, target_root = 0x0, cwd = 0x0, target_cwd = 0x0, output = 0x0, verbosity = 0, flav = GRUB_SYSLINUX_UNKNOWN} t = 0x86d9ae0 "" inpfull = 0x86daae8 "(host)//tmp/syslinux.cfg" rootfull = 0x86dabf0 "(host)//" res = 0x80490ed "__libc_start_main" cwd = 0x86d9a30 "/tmp" p = 0x86d9a34 "" cwdfull = 0x86dacf8 "(host)//tmp"