https://bugzilla.kernel.org/show_bug.cgi?id=215389
--- Comment #5 from Erhard F. (erhar...@mailbox.org) ---
Ok, with zswap lzo/zbud I also get this memory corruption on 5.15.13. So most
probably it's not lzo/z3pool but something else. I'll start a bisect then...
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The old sync_core_before_usermode() comments suggested that a
non-icache-syncing return-to-usermode instruction is x86-specific and that
all other architectures automatically notice cross-modified code on return
to userspace.
This is misleading. The incantation needed to modify code from one
CPU
powerpc did the following on some, but not all, paths through
switch_mm_irqs_off():
/*
* Only need the full barrier when switching between processes.
* Barrier when switching from kernel to userspace is not
* required here, given that it is implied by mmdrop().
On Thu, Jan 06, 2022 at 05:15:07PM +0530, Naveen N. Rao wrote:
> These instructions are updated after the initial JIT, so redo codegen
> during the extra pass. Rename bpf_jit_fixup_subprog_calls() to clarify
> that this is more than just subprog calls.
>
> Fixes: 69c087ba6225b5 ("bpf: Add
