[segfault] running ir-keytable with v4l-utils 0.8.9

[segfault] running ir-keytable with v4l-utils 0.8.9

[Wojciech Myrda]

On my system I have just installed using bumped Gentoo ebuilds v4l-utils
package

[ebuild   R    ] media-libs/libv4l-0.8.9::bigvo  0 kB
[ebuild   R    ] media-tv/v4l-utils-0.8.9::bigvo  USE="-qt4" 0 kB

ebuilds used for bumbing to version 0.8.9:
http://gentoo-portage.com/media-libs/libv4l/libv4l-0.8.8
http://gentoo-portage.com/media-tv/v4l-utils/v4l-utils-0.8.8-r1

However I experienced a segfault trying to run this command:
ir-keytable --protocol=rc-6 --device
/dev/input/by-id/usb-15c2_0038-event-if00

Trace I got in gdb:

gdb ir-keytable core
GNU gdb (Gentoo 7.5 p1) 7.5
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.gentoo.org/>...
Reading symbols from /usr/bin/ir-keytable...done.
[New LWP 11090]

warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
Core was generated by `ir-keytable --protocol=rc-6 --device
/dev/input/by-id/usb-15c2_0038-event-if00'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007fd1c6bdd410 in __strcpy_chk () from /lib64/libc.so.6
(gdb) bt full
#0  0x00007fd1c6bdd410 in __strcpy_chk () from /lib64/libc.so.6
No symbol table info available.
#1  0x00000000004037bc in strcpy (__src=<optimized out>,
__dest=0x7fff0a823010 "")
    at /usr/include/bits/string3.h:105
No locals.
#2  v1_set_hw_protocols (rc_dev=<optimized out>) at keytable.c:758
        fp = <optimized out>
        name = '\000' <repeats 1480 times>, "`\327\350\306\321\177",
'\000' <repeats 75 times>,
"p\031\000\000\000\000\000~m\031\000\000\000\000\000~m\031", '\000'
<repeats 13 times>,
"\005\000\000\000\000\000\000\000\000p9\000\000\000\000\000\000\320\071\000\000\000\000\000X\307\071\000\000\000\000\000`\f:\000\000\000\000\000\000p\031\000\000\000\000\000\003",
'\000' <repeats 271 times>,
"@F\n\307\321\177\000\000/\000\000\000\000\000\000\000\215\027\351\306\321\177\000\000\000\000\000\000\000\000\000\000\t\000\000\000\000\000\000\000\021\000\000\000\000\000\000\000\001",
'\000' <repeats 23 times>,
"p9\202\n\377\177\000\000\031\024\351\306\321\177\000\000\001\000\000\000\000\000\000\000XF\n\307\321\177\000\000p9\202\n\377\177\000\000\265\326\350\306\321\177",
'\000' <repeats 26 times>...
#3  0x00000000004019af in set_proto (rc_dev=0x7fff0a824030) at
keytable.c:1153
        rc = 0
#4  main (argc=<optimized out>, argv=<optimized out>) at keytable.c:1531
        dev_from_class = <optimized out>
        write_cnt = 0
        fd = 3
        names = 0x0
        rc_dev = {sysfs_name = 0x0, input_name = 0x7fd1c70a74e0
"@t\n\307\321\177",
          drv_name = 0x0,
          keytable_name = 0x100000000 <Address 0x100000000 out of bounds>,
          version = (unknown: 3339351856), type = (SOFTWARE_DECODER |
unknown: 32720),
          supported = 4196936, current = RC_6}

------
ir-keytable
Found /sys/class/rc/rc0/ (/dev/input/event12) with:
    Driver imon, table rc-imon-pad
    Supported protocols: RC-6 other
    Enabled protocols:
    Repeat delay = 500 ms, repeat period = 125 ms
------
dmesg |grep imon
[    4.783532] Registered IR keymap rc-imon-pad
[    4.789794] imon 9-3:1.0: iMON device (15c2:0038, intf0) on usb<9:2>
initialized
[    4.789849] imon 9-3:1.1: iMON device (15c2:0038, intf1) on usb<9:2>
initialized
[    4.789885] usbcore: registered new interface driver imon


Please take a look what might be wrong here

Regards,
Wojciech Myrda

Re: [segfault] running ir-keytable with v4l-utils 0.8.9

[Gregor Jasny]

Hello,

On 10/14/12 9:54 PM, Wojciech Myrda wrote:
> On my system I have just installed using bumped Gentoo ebuilds v4l-utils
> package
>
> [ebuild   R    ] media-libs/libv4l-0.8.9::bigvo  0 kB
> [ebuild   R    ] media-tv/v4l-utils-0.8.9::bigvo  USE="-qt4" 0 kB
>
> ebuilds used for bumbing to version 0.8.9:
> http://gentoo-portage.com/media-libs/libv4l/libv4l-0.8.8
> http://gentoo-portage.com/media-tv/v4l-utils/v4l-utils-0.8.8-r1
>
> However I experienced a segfault trying to run this command:
> ir-keytable --protocol=rc-6 --device
> /dev/input/by-id/usb-15c2_0038-event-if00

There seems to be some problems with options or file parsing. Valgrind 
is complaining, too. I'll have a look later.

Is this segfault a regression over an older v4l-utils version?

Thanks,
Gregor

Re: [segfault] running ir-keytable with v4l-utils 0.8.9

[Wojciech Myrda]

W dniu 16.10.2012 09:20, Gregor Jasny pisze:
> Hello,
>
> On 10/14/12 9:54 PM, Wojciech Myrda wrote:
>> On my system I have just installed using bumped Gentoo ebuilds v4l-utils
>> package
>>
>> [ebuild   R    ] media-libs/libv4l-0.8.9::bigvo  0 kB
>> [ebuild   R    ] media-tv/v4l-utils-0.8.9::bigvo  USE="-qt4" 0 kB
>>
>> ebuilds used for bumbing to version 0.8.9:
>> http://gentoo-portage.com/media-libs/libv4l/libv4l-0.8.8
>> http://gentoo-portage.com/media-tv/v4l-utils/v4l-utils-0.8.8-r1
>>
>> However I experienced a segfault trying to run this command:
>> ir-keytable --protocol=rc-6 --device
>> /dev/input/by-id/usb-15c2_0038-event-if00
>
> There seems to be some problems with options or file parsing. Valgrind
> is complaining, too. I'll have a look later.
>
> Is this segfault a regression over an older v4l-utils version?
>
> Thanks,
> Gregor
>

I just started using v4l-utils stuff so I wanted to use most recent
version available, hence I didn't try 0.8.8 previously, but seems
problem is there as well just with different lines of code appearing

mediapc@mediapc ~ $ gdb ir-keytable core
GNU gdb (Gentoo 7.5 p1) 7.5
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.gentoo.org/>...
Reading symbols from /usr/bin/ir-keytable...done.
[New LWP 1094]

warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
Core was generated by `ir-keytable --protocol=rc-6 --device
/dev/input/by-id/usb-15c2_0038-event-if00'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007f95eaf04410 in __strcpy_chk () from /lib64/libc.so.6
(gdb) bt full
#0  0x00007f95eaf04410 in __strcpy_chk () from /lib64/libc.so.6
No symbol table info available.
#1  0x000000000040365c in strcpy (__src=<optimized out>,
__dest=0x7fff36b958e0 "") at /usr/include/bits/string3.h:105
No locals.
#2  v1_set_hw_protocols (rc_dev=<optimized out>) at keytable.c:744
        fp = <optimized out>
        name = '\000' <repeats 1480 times>, "`G\033\353\225\177", '\000'
<repeats 75 times>,
"p\031\000\000\000\000\000~m\031\000\000\000\000\000~m\031", '\000'
<repeats 13 times>,
"\005\000\000\000\000\000\000\000\000p9\000\000\000\000\000\000\320\071\000\000\000\000\000X\307\071\000\000\000\000\000`\f:\000\000\000\000\000\000p\031\000\000\000\000\000\003",
'\000' <repeats 271 times>,
"@\266<\353\225\177\000\000/\000\000\000\000\000\000\000\215\207\033\353\225\177\000\000\000\000\000\000\000\000\000\000\t\000\000\000\000\000\000\000\021\000\000\000\000\000\000\000\001",
'\000' <repeats 23 times>,
"@b\271\066\377\177\000\000\031\204\033\353\225\177\000\000\001\000\000\000\000\000\000\000X\266<\353\225\177\000\000@b\271\066\377\177\000\000\265F\033\353\225\177",
'\000' <repeats 26 times>...
#3  0x00000000004019af in set_proto (rc_dev=0x7fff36b96900) at
keytable.c:1119
        rc = 0
#4  main (argc=<optimized out>, argv=<optimized out>) at keytable.c:1497
        dev_from_class = <optimized out>
        write_cnt = 0
        fd = 3
        names = 0x0
        rc_dev = {sysfs_name = 0x0, input_name = 0x7f95eb3ce4e0
"@\344<\353\225\177", drv_name = 0x0, keytable_name = 0x100000000
<Address 0x100000000 out of bounds>,
          version = (unknown: 3946637104), type = (SOFTWARE_DECODER |
unknown: 32660), supported = 4196936, current = RC_6}

Regards,
Wojciech

Re: [segfault] running ir-keytable with v4l-utils 0.8.9

[Gregor Jasny]

Hello Mauro,

On 10/14/12 9:54 PM, Wojciech Myrda wrote:
> However I experienced a segfault trying to run this command:
> ir-keytable --protocol=rc-6 --device /dev/input/by-id/usb-15c2_0038-event-if00

> Trace I got in gdb:
> Program terminated with signal 11, Segmentation fault.
> #0  0x00007fd1c6bdd410 in __strcpy_chk () from /lib64/libc.so.6
> (gdb) bt full
> #0  0x00007fd1c6bdd410 in __strcpy_chk () from /lib64/libc.so.6
> No symbol table info available.
> #1  0x00000000004037bc in strcpy (__src=<optimized out>,
> __dest=0x7fff0a823010 "")
>     at /usr/include/bits/string3.h:105
> No locals.
> #2  v1_set_hw_protocols (rc_dev=<optimized out>) at keytable.c:758
> #3  0x00000000004019af in set_proto (rc_dev=0x7fff0a824030) at keytable.c:1153

I looked at the crash and it seems that the rc_dev structure is not
initialized when a device name is set on the command line. Could you
please take a look?

Thanks,
Gregor

Re: [segfault] running ir-keytable with v4l-utils 0.8.9

[Gregor Jasny]

Hello,

On 10/27/12 1:26 PM, Gregor Jasny wrote:
> I looked at the crash and it seems that the rc_dev structure is not
> initialized when a device name is set on the command line. Could you
> please take a look?

I filed this as a Fedora bug report so that it does not get lost:
https://bugzilla.redhat.com/show_bug.cgi?id=872927

Thanks,
Gregor