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[Bug 1892761] Re: Heap-use-after-free through double-fetch in ehci
From: |
Thomas Huth |
Subject: |
[Bug 1892761] Re: Heap-use-after-free through double-fetch in ehci |
Date: |
Fri, 16 Jul 2021 17:22:50 -0000 |
Ok, let's close this one since it was not reproducible. If you find a
reproducer, please open a new ticket in the gitlab tracker instead.
** Changed in: qemu
Status: Incomplete => Won't Fix
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https://bugs.launchpad.net/bugs/1892761
Title:
Heap-use-after-free through double-fetch in ehci
Status in QEMU:
Won't Fix
Bug description:
Hello,
I don't have a qtest reproducer for this crash because it involves a DMA
double-fetch, and I don't think we can reproduce those with qtest.
Instead, I attached the pseudo-qtest trace produced by the fuzzer, along with
some trace events.
The lines annotated with [DMA] are write commands that were triggered by a
callback from a DMA read by the device. The lines annotated with [DOUBLE-FETCH]
are DMA accesses that hit the same address more than once (possible
double-fetches).
I am still thinking of nicer ways of presenting this trace and providing a
reproducer.
-Alex
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