[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 #5 from Konstantin Belousov <kib at FreeBSD.org> ---
(In reply to Greg V from comment #4)
Can you look at the abd_copy_off_cb() frame and infer the arguments used for
call
to memcpy() ?
%rdi 0x1020004000200a0 which is non-canonical address is clearly the issue,
and I do not believe that memcpy asm can result in such mangling.

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