Bug#835439: gdb --write segfaults on quit in _bfd_elf_strtab_finalize

2022-06-14 Thread Ben Harris 

Control: fixed 835439 10.1-2

Looking through my old Debian bug reports, I found this one that I'm still 
in a position to test, and I can confirm that the problem is fixed (and 
probably has been for several years):


wraith:/tmp/hello$ cat > hello.c
#include 

int main(int argc, char **argv)
{

printf("hello, world\n");
return 0;
}
wraith:/tmp/hello$ gcc -o hello hello.c
wraith:/tmp/hello$ gdb --quiet --write hello
Reading symbols from hello...
(No debugging symbols found in hello)
(gdb) quit
wraith:/tmp/hello$

--
Ben Harris, University of Cambridge Information Services.

Bug#835439: gdb --write segfaults on quit in _bfd_elf_strtab_finalize

2016-12-14 Thread Hector Oron 
Hello,

2016-12-13 23:38 GMT+01:00 Ben Harris :
> It looks like it's already been reported upstream:
>
> https://sourceware.org/bugzilla/show_bug.cgi?id=20948

Excellent! Thanks very much!

Regards
-- 
 Héctor Orón  -.. . -... .. .- -.   -.. . ...- . .-.. --- .--. . .-.

Bug#835439: gdb --write segfaults on quit in _bfd_elf_strtab_finalize

2016-12-13 Thread Ben Harris 

Control: forwarded -1 https://sourceware.org/bugzilla/show_bug.cgi?id=20948

On Tue, 13 Dec 2016, Hector Oron wrote:

Thanks for the report, I am able to reproduce it with the upcoming 7.12 
package. Could you please forward this one upstream to the GNU GDB 
community and keep this one up to date.


It looks like it's already been reported upstream:

https://sourceware.org/bugzilla/show_bug.cgi?id=20948

--
Ben Harris, University of Cambridge Information Services.

Bug#835439: gdb --write segfaults on quit in _bfd_elf_strtab_finalize

2016-12-12 Thread Hector Oron 
On Thu, Aug 25, 2016 at 06:40:47PM +0100, Ben Harris wrote:
> Package: gdb
> Version: 7.11.1-2
> Severity: normal
> 
> Dear Maintainer,
> 
> When I use "gdb --write" on a trivial executable and immediately type
> "quit", GDB segfaults:
> 
> wraith:/tmp/hello$ cat > hello.c
> #include 
> 
> int main(int argc, char **argv)
> {
> 
> printf("hello, world\n");
> return 0;
> }
> wraith:/tmp/hello$ gcc -o hello hello.c
> wraith:/tmp/hello$ gdb --quiet --write hello
> Reading symbols from hello...(no debugging symbols found)...done.
> (gdb) quit
> Segmentation fault

Thanks for the report, I am able to reproduce it with the upcoming 7.12 package.
Could you please forward this one upstream to the GNU GDB community and keep 
this one up to date.

Regards,
-- 
  Hector Oron


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Bug#835439: gdb --write segfaults on quit in _bfd_elf_strtab_finalize

2016-08-25 Thread Ben Harris 

Package: gdb
Version: 7.11.1-2
Severity: normal

Dear Maintainer,

When I use "gdb --write" on a trivial executable and immediately type
"quit", GDB segfaults:

wraith:/tmp/hello$ cat > hello.c
#include 

int main(int argc, char **argv)
{

printf("hello, world\n");
return 0;
}
wraith:/tmp/hello$ gcc -o hello hello.c
wraith:/tmp/hello$ gdb --quiet --write hello
Reading symbols from hello...(no debugging symbols found)...done.
(gdb) quit
Segmentation fault
wraith:/tmp/hello$

With gdb-dbg installed and running gdb under gdb, I get this stack
backtrace when doing the same thing:

#0  _bfd_elf_strtab_finalize (tab=0x0)
at /build/gdb-NKZwtf/gdb-7.11.1/bfd/elf-strtab.c:342
#1  0x08321a7b in _bfd_elf_assign_file_positions_for_non_load 
(abfd=0x8755528)

at /build/gdb-NKZwtf/gdb-7.11.1/bfd/elf.c:5840
#2  _bfd_elf_write_object_contents (abfd=0x8755528)
at /build/gdb-NKZwtf/gdb-7.11.1/bfd/elf.c:5876
#3  0x08306a92 in bfd_close (abfd=0x8755528)
at /build/gdb-NKZwtf/gdb-7.11.1/bfd/opncls.c:733
#4  0x082062d7 in gdb_bfd_close_or_warn (abfd=0x8755528)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/gdb_bfd.c:490
#5  gdb_bfd_unref (abfd=0x8755528)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/gdb_bfd.c:618
#6  0x08224275 in exec_close () at 
/build/gdb-NKZwtf/gdb-7.11.1/gdb/exec.c:94

#7  0x082249a3 in exec_close_1 (self=0x86465e0 )
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/exec.c:122
#8  0x0821ad22 in target_close (targ=0x86465e0 )
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/target.c:3318
#9  0x0821aee8 in unpush_target (t=0x86465e0 )
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/target.c:752
#10 0x0821af2c in unpush_target_and_assert (target=0x86465e0 )
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/target.c:762
#11 0x0821afba in pop_all_targets_above (above_stratum=dummy_stratum)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/target.c:776
#12 pop_all_targets () at /build/gdb-NKZwtf/gdb-7.11.1/gdb/target.c:791
#13 0x082b4276 in quit_force (args=0x0, from_tty=1)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/top.c:1578
#14 0x082b31c7 in execute_command (p=, from_tty=1)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/top.c:475
#15 0x081ed993 in command_handler (command=0x8661cb8 "quit")
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/event-top.c:491
#16 0x081ede52 in command_line_handler (rl=0x87c9008 "")
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/event-top.c:696
#17 0xb7f8deb2 in rl_callback_read_char ()
   from /lib/i386-linux-gnu/libreadline.so.6
#18 0x081ed9f8 in rl_callback_read_char_wrapper (client_data=0x0)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/event-top.c:171
#19 0x081eda44 in stdin_event_handler (error=0, client_data=0x0)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/event-top.c:430
#20 0x081ec1b6 in handle_file_event (file_ptr=0x8798798,
ready_mask=)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/event-loop.c:708
#21 0x081ec885 in gdb_wait_for_event (block=block@entry=1)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/event-loop.c:834
#22 0x081eca1b in gdb_do_one_event ()
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/event-loop.c:323
#23 0x081ecb4e in start_event_loop ()
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/event-loop.c:347
#24 0x081e60c8 in current_interp_command_loop ()
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/interps.c:317
#25 0x081e6b32 in captured_command_loop (data=0x0)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/main.c:318
#26 0x081e38d6 in catch_errors (func=0x81e6b20 ,
func_args=0x0, errstring=0x839d2a5 "", mask=RETURN_MASK_ALL)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/exceptions.c:240
#27 0x081e7713 in captured_main (data=0xb6e0)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/main.c:1157
#28 0x081e38d6 in catch_errors (func=0x81e7080 ,
func_args=0xb6e0, errstring=0x839d2a5 "", mask=RETURN_MASK_ALL)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/exceptions.c:240
#29 0x081e7fc8 in gdb_main (args=0xb6e0)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/main.c:1165
#30 0x08095e77 in main (argc=3, argv=0xb7a4)
at /build/gdb-NKZwtf/gdb-7.11.1/gdb/gdb.c:32

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 4.6.0-1-686-pae (SMP w/8 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/bash
Init: systemd (via /run/systemd/system)

Versions of packages gdb depends on:
ii  libbabeltrace-ctf1  1.4.0-3
ii  libbabeltrace1  1.4.0-3
ii  libc6   2.23-4
ii  libexpat1   2.2.0-1
ii  liblzma55.1.1alpha+20120614-2.1
ii  libncurses5 6.0+20160625-1
ii  libpython3.53.5.2-3
ii  libreadline66.3-8+b4
ii  libtinfo5   6.0+20160625-1
ii  zlib1g  1:1.2.8.dfsg-2+b1

Versions of packages gdb recommends:
ii  gdbserver 7.11.1-2
ii  libc6-dbg [libc-dbg]  2.23-4

Versions of packages gdb suggests:
pn  gdb-doc  

-- no debconf information

--
Ben Harris, University of Cambridge Information Services.