On Fri, Aug 25, 2023 at 10:19:32AM -0000, tip-bot2 for Josh Poimboeuf wrote:
> The following commit has been merged into the x86/bugs branch of tip:
>
> Commit-ID: b3be1397be0340b2c30b2dcd7339dbfaa5563e2b
> Gitweb: https://git.kernel.org/tip/b3be1397be0340b2c30b2dcd7339dbfaa5563e2b
> Author: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
> AuthorDate: Fri, 25 Aug 2023 00:01:41 -07:00
> Committer: Ingo Molnar <mingo@xxxxxxxxxx>
> CommitterDate: Fri, 25 Aug 2023 11:21:59 +02:00
>
> x86/srso: Fix vulnerability reporting for missing microcode
>
> The SRSO default safe-ret mitigation is reported as "mitigated" even if
> microcode hasn't been updated. That's wrong because userspace may still
> be vulnerable to SRSO attacks due to IBPB not flushing branch type
> predictions.
>
> Report the safe-ret + !microcode case as vulnerable.
>
> Also report the microcode-only case as vulnerable as it leaves the
> kernel open to attacks.
>
> Fixes: fb3bd914b3ec ("x86/srso: Add a Speculative RAS Overflow mitigation")
> Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
> Link: https://lore.kernel.org/r/65556eeb1bf7cb9bd7db8662ef115dd73191db84.1692919072.git.jpoimboe@xxxxxxxxxx
> ---
> Documentation/admin-guide/hw-vuln/srso.rst | 22 ++++++++++----
> arch/x86/kernel/cpu/bugs.c | 34 ++++++++++++---------
> 2 files changed, 37 insertions(+), 19 deletions(-)
This is still unfixed:
https://lore.kernel.org/r/20230825072542.GFZOhXdgXpUidW51lC@fat_crate.local
mingo, do you want fixes ontop or do you wanna rebase this branch?
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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