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[Bug libc/19580] New: argp: segfault in --help formatting code
- From: "simon at keinstein dot org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Mon, 08 Feb 2016 11:54:50 +0000
- Subject: [Bug libc/19580] New: argp: segfault in --help formatting code
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=19580
Bug ID: 19580
Summary: argp: segfault in --help formatting code
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: libc
Assignee: unassigned at sourceware dot org
Reporter: simon at keinstein dot org
CC: drepper.fsp at gmail dot com
Target Milestone: ---
Created attachment 8964
--> https://sourceware.org/bugzilla/attachment.cgi?id=8964&action=edit
sample program
The following program segfaults when run with argument '--help':
#include <argp.h>
static struct argp_option options[] = {
{"x", 'x', 0, 0,
"uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
"},
{0}
};
static struct argp argp = {options};
int
main (int argc, char **argv)
{
argp_parse(&argp, argc, argv, 0, 0, 0);
return 0;
}
Backtrace in gdb:
(gdb) run --help
Starting program: /home/simon/c/argp-wmargin --help
Usage: argp-wmargin [OPTION...]
-x, --x
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff77bb258 in _wordcopy_bwd_dest_aligned (dstp=6291432,
dstp@entry=6296216, srcp=6291472, srcp@entry=6296265,
len=2305843009213693352, len@entry=2305843009213693947) at wordcopy.c:398
398 wordcopy.c: Datei oder Verzeichnis nicht gefunden.
(gdb) bt
#0 0x00007ffff77bb258 in _wordcopy_bwd_dest_aligned (dstp=6291432,
dstp@entry=6296216, srcp=6291472, srcp@entry=6296265,
len=2305843009213693352, len@entry=2305843009213693947) at wordcopy.c:398
#1 0x00007ffff77b55f6 in __memmove_sse2 (dest=dest@entry=0x6012ba,
src=src@entry=0x6012eb, len=18446744073709551582,
len@entry=18446744073709551583) at ../string/memmove.c:106
#2 0x00007ffff781fb86 in __argp_fmtstream_update (fs=fs@entry=0x6011e0) at
argp-fmtstream.c:319
#3 0x00007ffff7822fce in __argp_fmtstream_set_lmargin (__lmargin=0,
__fs=0x6011e0) at argp-fmtstream.h:244
#4 hol_entry_help (hhstate=0x7fffffffd7a0, stream=0x6011e0,
state=0x7fffffffda20, entry=0x6014b0) at argp-help.c:1188
#5 hol_help (hol=0x601300, hol=0x601300, stream=0x6011e0,
state=0x7fffffffda20) at argp-help.c:1209
#6 _help (argp=0x7fffffffd860, state=state@entry=0x7fffffffda20,
stream=0x7ffff7ad62a0 <_IO_2_1_stdout_>,
flags=flags@entry=634, name=<optimized out>) at argp-help.c:1657
#7 0x00007ffff782327a in __argp_state_help (state=state@entry=0x7fffffffda20,
stream=<optimized out>,
flags=flags@entry=634) at argp-help.c:1733
#8 0x00007ffff78234fa in argp_default_parser (key=<optimized out>, arg=0x0,
state=0x7fffffffda20) at argp-parse.c:116
#9 0x00007ffff782426e in group_parse (arg=<optimized out>, key=33554495,
state=0x7fffffffda20, group=0x601058)
at argp-parse.c:257
#10 parser_parse_opt (val=<optimized out>, opt=33554495, parser=0x7fffffffd9b0)
at argp-parse.c:755
#11 parser_parse_next (arg_ebadkey=<synthetic pointer>, parser=0x7fffffffd9b0)
at argp-parse.c:867
#12 __argp_parse (argp=<optimized out>, argc=2, argv=<optimized out>,
flags=<optimized out>, end_index=0x0, input=0x0)
at argp-parse.c:921
#13 0x00000000004005d9 in main (argc=2, argv=0x7fffffffdbc8) at
argp-wmargin.c:21
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