[Bug 207383] [Regression] 5.7 amdgpu/polaris11 gpf: amdgpu_atomic_commit_tail

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=207383

--- Comment #83 from Christian König (christian.koenig at amd.com) ---
Instead of working around the bug I think we should concentrate on nailing the
root cause.

I suggest to insert an use after free check into just that structure. In other
words add a field "magic_number" will it with 0xdeadbeef on allocation and set
it to zero before the kfree().

A simple BUG_ON(ptr->magic_number != 0xdeadbeef) should yield results rather
quickly.

Then just add printk()s before the kfree() to figure out why we have this use
after free race.

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