The config is from 5.12-rc4, and the earliest kernel version that should
reproduce this is 5.12-rc1.
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https://bugs.launchpad.net/bugs/1920934
Title:
Heap-use-after-free in io_writex /
Yes, I have:
commit 5ca634afcf83215a9a54ca6e66032325b5ffb5f6 (HEAD -> master, origin/master,
origin/HEAD)
Merge: c95bd5ff16 cffb446e8f
Author: Peter Maydell
Date: Mon Mar 22 18:50:25 2021 +
Or another branch?
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Public bug reported:
qemu version: git 5ca634afcf83215a9a54ca6e66032325b5ffb5f6; 5.2.0
We've encountered that booting the Linux kernel in TCG mode, results in
a racy heap-use-after-free. The bug can be detected by ASan [A], but in
the majority of runs results in a crashing kernel [B].
To
FYI: we've hit this as will with syzkaller testing; this is still
reproducible as-is with latest qemu (commit a6ae238), and the latest
Linux kernel (5.1-rc7).
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