Hi Axel,
2016-04-03 00:29 Axel Beckert:
Package: aptitude
Version: 0.7.8-1
Hi,
aptitude segfaults under the following circumstances:
1. Log in as root on a Linux virtual console, i.e. after pressing
Ctrl-Alt-F1.
2. Start aptitude in TUI mode, i.e. without any options or parameters.
3. Press Ctrl-Z to suspend aptitude.
4. Enter "fg" on the commandline and press Enter to bring aptitude back
to the foreground.
5. Segfault.
This does not happen, if
* if tried inside an xterm
* if just TERM is set to "linux", but the terminal is no virtual linux
console, i.e. "env TERM=linux aptitude" does not exhibit the issue.
What's "TERM" in the vt console?
Mine is "linux", and as you noted, it works fine. If I "unset TERM" or
set it to the empty string, aptitude refuses to start ("Error opening
terminal: unknown"). If I set it to "linux", "xterm" or
"xterm-256color" it works fine. "vt100" works fine, but no colours.
In any case, I couldn't get it to crash by suspending and restoring.
I am no expert in TERM, so I'm not sure which other values are possible
and which ones are correct.
Unfortunately I was not able to reproduce the issue under gdb
directly. But this is the backtrace I got out of the core dump:
Reading symbols from /usr/bin/aptitude-curses...Reading symbols from
/usr/lib/debug/.build-id/17/b0aa382e98a7c74b766fe389e4e2c494dd8cce.debug...done.
done.
warning: core file may not match specified executable file.
[New LWP 6201]
[New LWP 6202]
[New LWP 6203]
[New LWP 6204]
[New LWP 6219]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `aptitude'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00007fe2861e5973 in ?? ()
[Current thread is 1 (Thread 0x7fe28a8d1780 (LWP 6201))]
(gdb) bt
#0 0x00007fe2861e5973 in ?? ()
#1 0x0000ffffffff0000 in ?? ()
#2 0x0000000100001839 in ?? ()
#3 0x0000000008000000 in ?? ()
#4 0x00007fe287fa8b0c in ___vsprintf_chk (s=0x7ffd08eb4380 "", flags=-1416311776,
slen=140724753089664, format=0x564aab94cc10 "\260R\266\252JV",
args=0x564aa764dc78, args@entry=0x7ffd08eb44c8) at vsprintf_chk.c:85
#5 0x00007fe287fa8a5d in ___sprintf_chk (s=<optimized out>, flags=<optimized out>,
slen=<optimized out>, format=<optimized out>) at sprintf_chk.c:31
#6 0x0000564aa764dc78 in ?? ()
#7 0x0000564aab94cc20 in ?? ()
#8 0x00007fe289d335d4 in ?? () from /usr/lib/x86_64-linux-gnu/libcwidget.so.3
#9 0x0000000000000080 in ?? ()
#10 0x00007ffd08eb4b20 in ?? ()
#11 0x0000564aab94cc10 in ?? ()
#12 0x000000000000000d in ?? ()
#13 0xfffffffffffffffc in ?? ()
#14 0x00007fe288af204f in pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:183
#15 0x0000000000000000 in ?? ()
(gdb)
None of the functions which name appears are from aptitude, cwidget or
apt, unfortunately.
Cheers.
--
Manuel A. Fernandez Montecelo <[email protected]>
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