[Bug 251736] [panic] memcpy_erms general protection fault on AMD Zen 3 (Ryzen 5000 series)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251736

--- Comment #6 from Mateusz Guzik <mjg at FreeBSD.org> ---
Relevant regs are messed up from the get go. The panicking case handles buffers
misaligned up to 16 bytes and saves the target before doing anything. The saved
address is clearly bogus.

Just in case, are you running with newest microcode for the cpu?

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