On Tue, Jan 21, 2020 at 1:20 AM Sean Young <sean@xxxxxxxx> wrote: > > Hello, > > On Mon, Jan 20, 2020 at 06:47:17PM -0800, camden lindsay wrote: > > Hello- > > I had a working ir-keytable script that stopped working the other day. > > Investigation led to finding that ir-keytable was segfaulting whenever > > trying to write a keymap from a file. > > > > [kodiuser@kodiarch ~]$ uname -a > > Linux kodiarch 5.4.13-arch1-1 #1 SMP PREEMPT Fri, 17 Jan 2020 23:09:54 > > +0000 x86_64 GNU/Linux > > [kodiuser@kodiarch ~]$ > > > > [kodiuser@kodiarch ~]$ ir-keytable -V > > IR keytable control version 1.18.0 > > [kodiuser@kodiarch ~]$ > > > > Here's an example of grabbing an existing keytable entry, putting it > > in a file, but showing that after clearing and trying to load that > > file the segfault. Segfault also occurs if not clearing first. > > > > [kodiuser@kodiarch ir-keytable]$ sudo ir-keytable -r | grep KEY_DOWN > > Enabled kernel protocols: lirc nec > > scancode 0x800f041f = KEY_DOWN (0x6c) > > [kodiuser@kodiarch ir-keytable]$ cat /etc/ir-keytable/keymap.txt > > scancode 0x800f041f = KEY_DOWN (0x6c) > > [kodiuser@kodiarch ir-keytable]$ sudo ir-keytable -c > > Old keytable cleared > > [kodiuser@kodiarch ir-keytable]$ sudo ir-keytable -w /etc/ir-keytable/keymap.txt > > Segmentation fault > > [kodiuser@kodiarch ir-keytable]$ sudo ir-keytable -r | grep KEY_DOWN > > Enabled kernel protocols: lirc nec > > [kodiuser@kodiarch ir-keytable]$ sudo ir-keytable -r > > Enabled kernel protocols: lirc nec > > [kodiuser@kodiarch ir-keytable]$ > > > > > > > > And this shows that the segfault still occurs even if i don't clear > > the keytable first (but of course the existing contents of the table > > still exist) > > [kodiuser@kodiarch ~]$ sudo ir-keytable -r | grep KEY_DOWN > > Enabled kernel protocols: lirc nec > > scancode 0x800f041f = KEY_DOWN (0x6c) > > [kodiuser@kodiarch ~]$ cat /etc/ir-keytable/keymap.txt > > scancode 0x800f041f = KEY_DOWN (0x6c) > > [kodiuser@kodiarch ~]$ sudo ir-keytable -w /etc/ir-keytable/keymap.txt > > Segmentation fault > > [kodiuser@kodiarch ~]$ sudo ir-keytable -r | grep KEY_DOWN > > Enabled kernel protocols: lirc nec > > scancode 0x800f041f = KEY_DOWN (0x6c) > > [kodiuser@kodiarch ~]$ > > I suspect ir-keytable is segfaulting in the code that reads the file; would > you be able to share the keymap.txt file please? That way I can see if I > can reproduce the problem. > > Parsing of the keymap is done in C which can be prone to these sorts of > problems. > > > Here is the example syslog output of the segfault: > > Jan 20 18:15:33 kodiarch kernel: ir-keytable[817]: segfault at 0 ip > > 00007f1a958436f5 sp 00007ffe039a5aa8 error 4 in > > libc-2.30.so[7f1a95707000+14d000] > > Jan 20 18:15:33 kodiarch kernel: Code: 00 00 0f 1f 00 31 c0 c5 f8 77 > > c3 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 89 f9 48 89 fa c5 f9 ef > > c0 83 e1 3f 83 f9 20 77 2b <c5> fd 74 0f c5 fd d7 c1 85 c0 0f 85 eb 00 > > 00 00 48 83 c7 20 83 e1 > > Jan 20 18:15:33 kodiarch systemd[1]: Started Process Core Dump (PID 818/UID 0). > > Jan 20 18:15:34 kodiarch systemd-coredump[819]: Process 817 > > (ir-keytable) of user 0 dumped core. > > > > Stack trace of thread 817: > > #0 0x00007f1a958436f5 > > __strlen_avx2 (libc.so.6 + 0x1616f5) > > #1 0x00007f1a95770be3 > > __strdup (libc.so.6 + 0x8ebe3) > > #2 0x0000563150aa43b7 > > n/a (ir-keytable + 0x83b7) > > #3 0x0000563150aa44c6 > > n/a (ir-keytable + 0x84c6) > > #4 0x00007f1a957edfc0 > > argp_parse (libc.so.6 + 0x10bfc0) > > #5 0x0000563150aa2099 > > n/a (ir-keytable + 0x6099) > > #6 0x00007f1a95709153 > > __libc_start_main (libc.so.6 + 0x27153) > > #7 0x0000563150aa325e > > n/a (ir-keytable + 0x725e) > > Jan 20 18:15:34 kodiarch systemd[1]: systemd-coredump@3-818-0.service: > > Succeeded. > > This would have to be done a in debug build. > > Thanks > Sean Hello, Sean- I'd be happy to share the files, I greatly appreciate you looking into this. I'll try attaching them to this email. There are two files- one was my original file, the other was my attempt to make the most basic file based on a single line of ir-keytable -r. many thanks Camden
scancode 0x800f041f = KEY_DOWN (0x6c)
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keymap.txt.wasworking
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