"stack smashing detected" in mythbackend
MmAaXx500 opened this issue · comments
-
Platform: RaspberryPi OS
Linux raspberrypi 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr 3 17:24:16 BST 2023 aarch64 GNU/Linux -
MythTV version: fixes/33
-
Package version: N/A built from source
-
Component: backend
What steps will reproduce the bug?
I don't have exact steps. Just running it for hours and it happens
How often does it reproduce? Is there a required condition?
I cannot pinpoint any exact action, time, or anything that causes it.
So far I only experienced during live tv
What is the expected behaviour?
Don't smash the stack
What do you see instead?
Sometimes the backend crashes with *** stack smashing detected ***: terminated. I cannot pinpoint any exact action, time, or anything that causes it.
I'd like to note that
- this build does not have the
fstack-protectorin place (Qt libs does) - MythSocket::IsDataAvailable() is always on the stack (at least on the 2 catched crashes)
Backtraces below. I'm trying to catch it with asan but so far I'm only able to catch a (maybe unrelated) heap-use-after-free (detailed in #769 ).
Additional information
Hardware is a Raspberry Pi 4 (aarch64)
Frontend is Kodi on the same machine.
Exact command I used to build:
../../packaging/deb-light/build_package.sh -c "--cpu=native --disable-firewire --disable-hdhomerun --disable-vbox --disable-ceton --disable-satip --enable-opengl --enable-vulkan --disable-vdpau --disable-vaapi --disable-nvdec --disable-dxva2 --disable-mediacodec --disable-mmal --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libvpx --compile-type=profile"
I have tried with --toolchain=hardened but for 3 days I was unable to catch it. From yesterday I'm trying with --toolchain=hardened + asan but so far only catched a heap-use-after-free (detailed in #769 )
