illegal instruction(core dump) ,in ubuntu 22.04

[shuguanglangchao]

I update my ubuntu OS from 16.04 to 22.04,when I install Gqrx from Ubuntu Software,the gqrx does't work.
so I try to make from source code,the same .
why?

[cobol400]

I have the same issue. In Ubuntu 20.04 everything works well. But using Ubuntu 22.04 I get the following error at startup of gqrx (sorry, german OS):
Ungültiger Maschinenbefehl (Speicherabzug geschrieben)

And in dmesg:
[ 1030.244811] traps: gqrx[4237] trap invalid opcode ip:7f97a0364660 sp:7ffdab06c290 error:0 in librte_net.so.22.0[7f97a0364000+3000]

[OOpeExtactOR]

I can confirm having the same error "Illegal instruction (core dumped)" on a fresh Lubuntu. 22.04.2 , kernel 5.15.0-60
console start shows this error, GUI start simply shows nothing

[gcomeaux]

On my machine, it looks like the problem is that the SSE 4.2 instruction set extensions are missing, specifically, the pcmpgtq opcode. cat /proc/cpuinfo shows that the latest I have is sse4_1. If pcmpgtq is really required, I guess the only option is to update my hardware. Otherwise, the toolchain should be checked for generating less compatible instructions (i.e. for gcc, don't use or disable the -msse4.2 option).

[argilo]

Could someone use gdb to provide a full stack trace, preferably with debug symbols installed? This would help track down whether this is an issue in Gqrx itself, or one of its dependencies.

[gcomeaux]

Looks like the problem is with librte-net22 package?
$ dpkg -S /usr/lib/x86_64-linux-gnu/librte_net.so.22.0 librte-net22:amd64: /usr/lib/x86_64-linux-gnu/librte_net.so.22.0

`
Downloading 0.01 MB separate debug info for /lib/x86_64-linux-gnu/libbrotlicommon.so.1

Program received signal SIGILL, Illegal instruction.
0x00007ffff341b684 in __rte_rand_lfsr258_gen_seed (min_value=, seed=) at ../lib/eal/common/rte_random.c:60
Download failed: Invalid argument. Continuing without source file ./obj-x86_64-linux-gnu/../lib/eal/common/rte_random.c.
60 ../lib/eal/common/rte_random.c: No such file or directory.
(gdb) bt
#0 0x00007ffff341b684 in __rte_rand_lfsr258_gen_seed (min_value=, seed=)
at ../lib/eal/common/rte_random.c:60
#1 __rte_srand_lfsr258 (state=, seed=) at ../lib/eal/common/rte_random.c:72
#2 rte_srand (seed=7808623144792863306) at ../lib/eal/common/rte_random.c:86
#3 0x00007ffff340f8cc in _sub_I_65535_0.0 () from /lib/x86_64-linux-gnu/librte_eal.so.22
#4 0x00007ffff7fcbfbe in call_init (l=, argc=argc@entry=1, argv=argv@entry=0x7fffffffe2c8,
env=env@entry=0x7fffffffe2d8) at ./elf/dl-init.c:70
#5 0x00007ffff7fcc0a8 in call_init (env=0x7fffffffe2d8, argv=0x7fffffffe2c8, argc=1, l=)
at ./elf/dl-init.c:33
#6 _dl_init (main_map=0x7ffff7ffe2e0, argc=1, argv=0x7fffffffe2c8, env=0x7fffffffe2d8) at ./elf/dl-init.c:117
#7 0x00007ffff7fe48b0 in _dl_start_user () from /lib64/ld-linux-x86-64.so.2
#8 0x0000000000000001 in ?? ()
#9 0x00007fffffffe55c in ?? ()
#10 0x0000000000000000 in ?? ()
(gdb) df __rte_rand_lfsr258_gen_seed
Undefined command: "df". Try "help".
(gdb) disassemble __rte_rand_lfsr258_gen_seed
Dump of assembler code for function rte_srand:
0x00007ffff341b560 <+0>: endbr64
0x00007ffff341b564 <+4>: movq %rdi,%xmm2
0x00007ffff341b569 <+9>: movdqa 0x1b4bf(%rip),%xmm3 # 0x7ffff3436a30
0x00007ffff341b571 <+17>: punpcklqdq %xmm2,%xmm2
0x00007ffff341b575 <+21>: lea 0x48684(%rip),%rax # 0x7ffff3463c00 <rand_states>
0x00007ffff341b57c <+28>: movaps %xmm2,-0x18(%rsp)
0x00007ffff341b581 <+33>: movdqa 0x1b486(%rip),%xmm13 # 0x7ffff3436a10
0x00007ffff341b58a <+42>: movdqa 0x1b4ae(%rip),%xmm2 # 0x7ffff3436a40
0x00007ffff341b592 <+50>: lea 0x2000(%rax),%rdx
0x00007ffff341b599 <+57>: movdqa 0x1b4be(%rip),%xmm14 # 0x7ffff3436a60
0x00007ffff341b5a2 <+66>: nopw 0x0(%rax,%rax,1)
0x00007ffff341b5a8 <+72>: movdqa %xmm13,%xmm1
0x00007ffff341b5ad <+77>: movdqa -0x18(%rsp),%xmm7
0x00007ffff341b5b3 <+83>: paddd 0x1b464(%rip),%xmm13 # 0x7ffff3436a20
0x00007ffff341b5bc <+92>: add $0x100,%rax
0x00007ffff341b5c2 <+98>: movdqa 0x1b485(%rip),%xmm11 # 0x7ffff3436a50
0x00007ffff341b5cb <+107>: pmovzxdq %xmm1,%xmm4
0x00007ffff341b5d0 <+112>: psrldq $0x8,%xmm1
0x00007ffff341b5d5 <+117>: pmovzxdq %xmm1,%xmm1
0x00007ffff341b5da <+122>: paddq %xmm7,%xmm4
0x00007ffff341b5de <+126>: movdqa 0x1b489(%rip),%xmm10 # 0x7ffff3436a70
0x00007ffff341b5e7 <+135>: paddq %xmm7,%xmm1
0x00007ffff341b5eb <+139>: movdqa %xmm4,%xmm0
0x00007ffff341b5ef <+143>: movdqa 0x1b478(%rip),%xmm9 # 0x7ffff3436a70
0x00007ffff341b5f8 <+152>: movdqa %xmm1,%xmm5
0x00007ffff341b5fc <+156>: psrlq $0x20,%xmm0
0x00007ffff341b601 <+161>: shufps $0x88,%xmm1,%xmm4
0x00007ffff341b605 <+165>: movdqa 0x1b472(%rip),%xmm8 # 0x7ffff3436a80
--Type for more, q to quit, c to continue without paging--
0x00007ffff341b60e <+174>: psrlq $0x20,%xmm5
0x00007ffff341b613 <+179>: movdqa 0x1b465(%rip),%xmm7 # 0x7ffff3436a80
0x00007ffff341b61b <+187>: shufps $0x88,%xmm5,%xmm0
0x00007ffff341b61f <+191>: pxor %xmm4,%xmm0
0x00007ffff341b623 <+195>: pmulld %xmm3,%xmm0
0x00007ffff341b628 <+200>: paddd %xmm2,%xmm0
0x00007ffff341b62c <+204>: movdqa %xmm0,%xmm1
0x00007ffff341b630 <+208>: pmovzxdq %xmm0,%xmm4
0x00007ffff341b635 <+213>: pmulld %xmm3,%xmm1
0x00007ffff341b63a <+218>: psrldq $0x8,%xmm0
0x00007ffff341b63f <+223>: pmovzxdq %xmm0,%xmm0
0x00007ffff341b644 <+228>: paddd %xmm2,%xmm1
0x00007ffff341b648 <+232>: pmovzxdq %xmm1,%xmm5
0x00007ffff341b64d <+237>: psllq $0x20,%xmm5
0x00007ffff341b652 <+242>: por %xmm4,%xmm5
0x00007ffff341b656 <+246>: movdqa %xmm1,%xmm4
0x00007ffff341b65a <+250>: paddq %xmm5,%xmm11
0x00007ffff341b65f <+255>: pmulld %xmm3,%xmm1
0x00007ffff341b664 <+260>: psrldq $0x8,%xmm4
0x00007ffff341b669 <+265>: pmovzxdq %xmm4,%xmm4
0x00007ffff341b66e <+270>: psllq $0x20,%xmm4
0x00007ffff341b673 <+275>: paddd %xmm2,%xmm1
0x00007ffff341b677 <+279>: por %xmm0,%xmm4
0x00007ffff341b67b <+283>: movdqa %xmm5,%xmm0
0x00007ffff341b67f <+287>: psubq %xmm14,%xmm0
=> 0x00007ffff341b684 <+292>: pcmpgtq 0x1b423(%rip),%xmm0 # 0x7ffff3436ab0
0x00007ffff341b68d <+301>: pblendvb %xmm0,%xmm5,%xmm11
0x00007ffff341b693 <+307>: movdqa %xmm4,%xmm0
0x00007ffff341b697 <+311>: movdqa 0x1b3b1(%rip),%xmm5 # 0x7ffff3436a50
`

[argilo]

Yes, it does appear the problem lies in the librte-net22 package.

On Ubuntu 22.04, gqrx-sdr depends on gr-osmosdr, which depends on libuhd4.1.0 (to provide support for USRP radios), which depends on librte-hash22, which depends on librte-net22. So the problem would seem to be many layers removed from Gqrx itself. I would suggest opening a bug report on Ubuntu's librte-net22 package.

[argilo]

You could perhaps verify that the problem is outside Gqrx by installing the uhd-host package and running uhd_usrp_probe, which also uses librte-net22.

[gcomeaux]

I installed uhd-host, ran gdb uhd_usrp_probe, and I see the same problem. Thank you for the test case. I'll reference this issue over at the librte-net22 package.

The ubuntu bug reporting system would not allow me to select librte-net22 as the package, so I chose dpdk instead. https://bugs.launchpad.net/ubuntu/+source/dpdk/+bug/2009635

[argilo]

Thanks for checking. That confirms that the problem is outside Gqrx, but it's certainly unfortunate for us.

[OOpeExtactOR]

Thanks for the review! It seems to be a problem of outdated HW, from all I can get.
So I understand if a fix for librte-net22 is not provided.
I will find another suitable HW to use Gqrx in a mobile environment, or go back to an older version of the OS.
Thanks again! BR

[argilo]

I dug a bit more into this, and it seems like Debian provides two versions of libuhd, one which requires DPDK (https://packages.debian.org/sid/libuhd4.3.0-dpdk) and one which does not (https://packages.debian.org/sid/libuhd4.3.0). Only the DPDK version links to librte-*.

Likewise, Ubuntu 22.04 has two versions: https://packages.ubuntu.com/jammy/libuhd4.1.0-dpdk and https://packages.ubuntu.com/jammy/libuhd4.1.0. But they both link to DPDK libraries (librte-*). So it seems to me the bug lies with the libuhd4.1.0 package, which shouldn't use DPDK.

[vsv68]

Has anyone found a solution to this problem? I haven't been able to use gqrx for more than 6 months.

[vsv68]

Solved the problem, assembled and installed uhd 4.3.0 from the source.

$ git clone https://git.launchpad.net/ubuntu/+source/uhd
$ cd uhd
$ cd host
$ mkdir build
$ cd build
$ cmake ..
$ make
$ sudo make install
$ cd /usr/lib/x86_64-linux-gnu/
$ sudo mv libuhd.so.4.1.0 /home/user/libuhd.so.4.1.0.back
$ sudo ln -s /usr/local/lib/libuhd.so.4.3.0 libuhd.so.4.1.0
$ sudo ldconfig

After that everything works.

[AsciiWolf]

Please, report the issue here instead of just working it around. Thanks!