Messages in this thread | | | Date | Wed, 24 Jun 2015 17:37:54 -0700 | Subject | Re: [RFC PATCH] Fix: x86 unaligned __memcpy to/from virtual memory | From | Linus Torvalds <> |
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On Wed, Jun 24, 2015 at 4:54 PM, Mathieu Desnoyers <mathieu.desnoyers@efficios.com> wrote: > > OK, see below. This time the fault occurred at an unaligned address. > It fails on the !pte_present(*pte_ref) check.
So every time, %rcx is 0x001fb.
Once, your rdx value (which is remaining bytes after the movsq) was 3, the other two times it's 0.
What's so magical about that 4056-byte copy (+3 bytes once)? Are you *sure* that copy is valid?
Linus
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