As revealed by this writeup[1], due to the fact that __kmalloc_node (now
renamed to __kmalloc_node_noprof) is an exported symbol and will never
get inlined, using it in kvmalloc_node (now is __kvmalloc_node_noprof)
would make the RET_IP inside always point to the same address:
upper_caller
On Wed, Jan 22, 2025, Frederic Weisbecker wrote:
> Le Tue, Jan 14, 2025 at 06:51:35PM +0100, Valentin Schneider a écrit :
> > ct_nmi_{enter, exit}() only touches the RCU watching counter and doesn't
> > modify the actual CT state part context_tracking.state. This means that
> > upon receiving an IR
Le Tue, Jan 14, 2025 at 06:51:35PM +0100, Valentin Schneider a écrit :
> ct_nmi_{enter, exit}() only touches the RCU watching counter and doesn't
> modify the actual CT state part context_tracking.state. This means that
> upon receiving an IRQ when idle, the CT_STATE_IDLE->CT_STATE_KERNEL
> transit
On Mon, Jan 20, 2025 at 04:36:53PM -0800, Kees Cook wrote:
> Enable -fzero-init-padding-bits=all when available (GCC 15+). This will
> correctly zero padding bits in structs and unions that might have been
> left uninitialized, and will make sure there is no regression in union
> initializations[1]
> >
> > As noted before, we defer flushing for vmalloc. We have a lazy-threshold
> > which can be exposed(if you need it) over sysfs for tuning. So, we can add
> > it.
> >
>
> In a CPU isolation / NOHZ_FULL context, isolated CPUs will be running a
> single userspace application that will never en
On Fri, Jan 17, 2025 at 5:08 PM Liam R. Howlett wrote:
>
> * enh [250117 14:35]:
> ...
>
> >
> > as a maintainer of a different linux libc, i've long wanted a "tell me
> > everything there is to know about this vma" syscall rather than having
> > to parse /proc/maps...
> >
>
> You mean an ioctl()
psz_init_zones is not supposed to return NULL. It returns an errno,
and its caller always checks for an errno to look for a problem.
If the caller receives a NULL as a return, this code will go further
without any errors:
cxt->kpszs = psz_init_zones(PSTORE_TYPE_DMESG, &off,
Le Tue, Jan 14, 2025 at 06:51:17PM +0100, Valentin Schneider a écrit :
> We now have an RCU_EXPERT config for testing small-sized RCU dynticks
> counter: CONFIG_RCU_DYNTICKS_TORTURE.
>
> Modify scenario TREE04 to exercise to use this config in order to test a
> ridiculously small counter (2 bits)
Le Tue, Jan 14, 2025 at 06:51:16PM +0100, Valentin Schneider a écrit :
> A later commit will reduce the size of the RCU watching counter to free up
> some bits for another purpose. Paul suggested adding a config option to
> test the extreme case where the counter is reduced to its minimum usable
>
On Fri, Jan 10, 2025 at 03:16:08PM +0100, Joel Granados wrote:
Hi Joel,
> Add the const qualifier to all the ctl_tables in the tree except for
> watchdog_hardlockup_sysctl, memory_allocation_profiling_sysctls,
> loadpin_sysctl_table and the ones calling register_net_sysctl (./net,
> drivers/inifi
On 5/16/23 23:55, Kees Cook wrote:
> On Mon, May 08, 2023 at 09:21:00PM +0530, Mukesh Ojha wrote:
>> 1. Device_coredump allocates some configurable contigous memory that can be
>> controlled
>>via CONFIG or bootargs and later registers for panic notifiers.
>> 2. Notifier gets added.
>> 3. P
On Mon, Jan 20, 2025 at 01:21:54PM -0800, Kees Cook wrote:
> On Fri, Jan 17, 2025 at 01:03:36PM +, Mel Gorman wrote:
> > HARDENED_USERCOPY defaults to on if enabled at compile time. Allow
> > hardened_usercopy= default to be set at compile time similar to
> > init_on_alloc= and init_on_free=. T
On Mon, Jan 20, 2025 at 01:10:44PM -0800, Kees Cook wrote:
> On Fri, Jan 17, 2025 at 01:03:35PM +, Mel Gorman wrote:
> > There is a submenu for 'Kernel hardening options' under "Security".
> > Move HARDENED_USERCOPY under the hardening options as it is clearly
> > related.
> >
> > Signed-off-b
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