Ron Aaron wrote:
> Compiling with "./configure CFLAGS='-g'" and then gdb src/vim, I get a
> crash right at startup do to buffer overflow:
>
>
> #4 0xb7644105 in __GI___fortify_fail (msg=0xb76a3648 "buffer overflow
> detected") at fortify_fail.c:38
> #5 0xb7642eba in __GI___chk_fail () at chk_fail.c:29
> #6 0xb76421ed in __strcpy_chk (dest=dest@entry=0x82eb671 <vimvars+17> "c",
> src=0x81edf5d "count", destlen=<optimized out>, destlen@entry=1)
> at strcpy_chk.c:61
> #7 0x0807920a in strcpy (__src=<optimized out>, __dest=0x82eb671
> <vimvars+17> "c") at /usr/include/i386-linux-gnu/bits/string3.h:105
> #8 eval_init () at eval.c:851
> #9 0x081ade34 in main (argc=1, argv=0xbffff754) at main.c:231
>
> Rerunning w/ a breakpoint at the problem:
>
> 851 STRCPY(p->vv_di.di_key, p->vv_name);
> (gdb) p p->vv_di
> $1 = {di_tv = {v_type = 1 '\001', v_lock = 0 '\000', vval = {v_number = 0,
> v_float = 0, v_string = 0x0, v_list = 0x0, v_dict = 0x0}},
> di_flags = 0 '\000', di_key = ""}
> (gdb) p p->vv_di.di_key
> $2 = ""
> (gdb) p p->vv_name
> $3 = 0x81edf5d "count"
> (gdb) n
> *** buffer overflow detected ***: /home/ron/proj/2html-test/vim/src/vim
> terminated
Sounds like you are using -D_FORTIFY_SOURCE=2
That doesn't work.
If that's not the problem, what are your CFLAGS set to?
If that is the problem, check configure output for why it wasn't changed
to -D_FORTIFY_SOURCE=1
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