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** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1977857
Title:
[amdgpu] denial of service by WebGL - GPU crashes with system
impairment
Status in linux package in Ubuntu:
Confirmed
Bug description:
Using Ubuntu 20.04.04 with Kernel 5.13.0-46-generic on AMD Ryzen
V1605B Platform with integrated Radeon Vega 8 GPU.
I am currently working on an Web application using tensorflowjs, which in
turn uses WebGL for computations.
When "provoking" the GPU by a lot of memory allocations, it can easily be
crashed with consequences for the whole system. Symptoms include:
-Chromium browser hung in a way that the current tab cant be reloaded.
Browser restart fixes this sometimes. Otherwise see below.
-Chromium browser exiting, and can't be restarted. Any attempt to run
it just hangs without opening a window at all. Using terminal-only
applications still works as normal. System reboot fixes this. But..
-After triggering the bugs above, quite often system restart fails
(system hang on shutdown). Only power cycling fixes this.
-Sometimes whole system freezing, and can't be restarted. SSH
connections stall too.
All of these can be triggered by a rogue website, and provide risk of
denial and data loss.
Of course we can blame Chromium first for unsane memory management,
but even a rogue userspace application should not render the GPU
useless or stalled forever.
We can also blame mesa I guess, but as amdgpu is the kernel part is
has to handle such attacks in my opinion. I've also changed to updated
Mesa from obiaf ppa, which won't fix the whole situation.
Maybe also amdgpu firmware is part of the problem.
Sadly I didn't collect the dmesg traces of all those crashes, but
there where plenty of different messages there. I will add dmesg
traces here, if it's happen again (but currently I try to stabilize
the system less crashes will happen).
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