[Bug 1937031] Re: GPF in rtl2832

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(package changed to linux as "kernel fault" is mentioned; probably
should be gnuradio)

** Package changed: ubuntu => linux (Ubuntu)

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https://bugs.launchpad.net/bugs/1937031

Title:
GPF in rtl2832

Status in linux package in Ubuntu:
New

Bug description:

I'm using a nooelec "nesdr smart" and GnuRadio - however every time i try to run the gnuradio program, i get a kernel fault. the computer then seems to be unusable. it doesn't crash, but it becomes unstable - various programs don't work correctly, can't edit files... the only way to resolve this is to reboot.

The problem appears reliably every time. I get a an error reported,
which i can see with dmesg. I can't save the error to a file - as
saving files doesn't seem to work correctly after this error (e.g. vi
error.txt, then save will hang)

I'll add some details about the error here, and attach a screenshot.

(this is me transcribing the screenshot, so hopefully accurate!)

general protection fault: 0000 [#1] SMP PTI
CPU: 3: PID: 866 Comm: kworker/3:3 Tainted: P
Workqueue: events rtl2832_i2c_gate_work [rtl2832]

call trace:
? __switch_to_asm+0x40/0x70
? __switch_to_asm+0x34/0x70
? __switch_to_asm+0x40/0x70
? __switch_to_asm+0x34/0x70
? __switch_to_asm+0x40/0x70
? __switch_to_asm+0x40/0x70
? __switch_to_asm+0x34/0x70
? __switch_to_asm+0x40/0x70
? __switch_to_xtra+0x1ae/0x5e0
? __switch_to_asm+0x40/0x70
? __switch_to_asm+0x34/0x70
? __switch_to_asm+0x40/0x70
? __switch_to_asm+0x40/0x70
__mutex_lock_slowpath+0x13/0x20
mutex_lock+0x2e/0x40
regmap_lock_mutex+0xe/0x10
regmap_update_bits_base+0x3b/0x90
rtl2832_i2c_gate_work+0x31/0x70 [rtl2832]
process_one_work+0x1eb/0x3b0

RIP: 0010:__mutex_lock.isra.0+0x78/0x4f0

uname -a
Linux beasty 5.4.0-77-generic #86-Ubuntu SMP Thu Jun 17 02:35:03 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

Memory: 65678960K/67040508K available (14339K kernel code, 2400K
rwdata, 5008K rodata, 2736K init, 4964K bss, 1361548K reserved, 0K
cma-reserved)

CPU0: Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz (family: 0x6, model:
0x5e, stepping: 0x3)

happy to supply further information if required.

Thanks!

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