On Mon, 2024-07-01 at 15:08 +0200, Peter Zijlstra wrote:
> On Mon, Jun 24, 2024 at 05:59:05AM +, Dhananjay Ugwekar wrote:
> > Prep for addition of power_per_core PMU to handle core scope energy
> > consumption for AMD CPUs.
> >
> > Replace the generic names with *_pkg*, to differentiate betwee
On 1.07.24 19:42, Bjorn Andersson wrote:
On Fri, Jun 07, 2024 at 11:09:25PM GMT, Odelu Kukatla wrote:
Enable QoS configuration for master ports with predefined values
for priority and urgency forawrding.
This patch causes QCS6490 RB3Gen2 to hit a bus timeout and crash during
boot, unless the
Both memdup_user() and vmemdup_user() handle allocations that are
regularly used for exploiting use-after-free type confusion flaws in
the kernel (e.g. prctl() PR_SET_VMA_ANON_NAME[1] and setxattr[2][3][4]
respectively).
Since both are designed for contents coming from userspace, it allows
for use
The msg subsystem is a common target for exploiting[1][2][3][4][5][6][7]
use-after-free type confusion flaws in the kernel for both read and write
primitives. Avoid having a user-controlled dynamically-size allocation
share the global kmalloc cache by using a separate set of kmalloc buckets
via the
Plumb kmem_buckets arguments through kvmalloc_node_noprof() so it is
possible to provide an API to perform kvmalloc-style allocations with
a particular set of buckets. Introduce kvmalloc_buckets_node() that takes a
kmem_buckets argument.
Signed-off-by: Kees Cook
---
include/linux/slab.h | 4 +++-
Encapsulate the concept of a single set of kmem_caches that are used
for the kmalloc size buckets. Redefine kmalloc_caches as an array
of these buckets (for the different global cache buckets).
Signed-off-by: Kees Cook
---
include/linux/slab.h | 5 +++--
mm/slab_common.c | 3 +--
2 files cha
Dedicated caches are available for fixed size allocations via
kmem_cache_alloc(), but for dynamically sized allocations there is only
the global kmalloc API's set of buckets available. This means it isn't
possible to separate specific sets of dynamically sized allocations into
a separate collection
Hi,
v6:
- update commit logs:
- update description of Kconfig default and API details
- call out usage of SLAB_NO_MERGE
- improve description of cross-cache attacks
- fix typos
- add kern-doc parsing of DECL_BUCKET_PARAMS macro
- add kern-doc to kmem_buckets_create()
- hav
Introduce CONFIG_SLAB_BUCKETS which provides the infrastructure to
support separated kmalloc buckets (in the following kmem_buckets_create()
patches and future codetag-based separation). Since this will provide
a mitigation for a very common case of exploits, it is recommended to
enable this featur
On Fri, Jun 07, 2024 at 11:09:25PM GMT, Odelu Kukatla wrote:
> Enable QoS configuration for master ports with predefined values
> for priority and urgency forawrding.
>
This patch causes QCS6490 RB3Gen2 to hit a bus timeout and crash during
boot, unless the associated DeviceTree change (adding cl
On Mon, Jul 01, 2024 at 09:02:38AM +0100, David Woodhouse wrote:
> On Sun, 2024-06-30 at 14:28 +0100, Simon Horman wrote:
> >
> > W=1 allmodconfig builds with gcc-13 flag the following.
> > Reading the documentation of strncpy() in fortify-string.h,
> > I wonder if strscpy() would be more appropri
On Mon, Jun 24, 2024 at 05:59:05AM +, Dhananjay Ugwekar wrote:
> Prep for addition of power_per_core PMU to handle core scope energy
> consumption for AMD CPUs.
>
> Replace the generic names with *_pkg*, to differentiate between the
> scopes of the two different PMUs and their variables.
But
On Mon, Jun 24, 2024 at 05:59:02AM +, Dhananjay Ugwekar wrote:
> This patch is in preparation for addition of per-core energy counter
> support for AMD CPUs.
>
> Per-core energy counter PMU will need a separate cpumask. It seems like
> a better approach to add the cpumask inside the rapl_pmus
On Mon, Jun 24, 2024 at 05:58:59AM +, Dhananjay Ugwekar wrote:
> diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
> index b985ca79cf97..73be25e1f4b4 100644
> --- a/arch/x86/events/rapl.c
> +++ b/arch/x86/events/rapl.c
> @@ -103,6 +103,10 @@ static struct perf_pmu_events_att
On 2024/5/29 06:12, Thomas Gleixner wrote:
[这封邮件来自外部发件人 谨防风险]
On Tue, May 28 2024 at 07:18, Dave Hansen wrote:
On 5/27/24 23:38, Tony W Wang-oc wrote:
...> diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index c96ae8fee95e..ecadd0698d6a 100644
--- a/arch/x86/kernel/hpet.c
+++
On Sun, 2024-06-30 at 14:28 +0100, Simon Horman wrote:
>
> W=1 allmodconfig builds with gcc-13 flag the following.
> Reading the documentation of strncpy() in fortify-string.h,
> I wonder if strscpy() would be more appropriate in this case.
It's never going to matter in practice, as the buffer is
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