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From: Andrey Konovalov <andreyknvl@google.com>
To: Alexander Potapenko <glider@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	 Vegard Nossum <vegard.nossum@oracle.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	 Linux Memory Management List <linux-mm@kvack.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	 Andreas Dilger <adilger.kernel@dilger.ca>,
	Andrey Ryabinin <aryabinin@virtuozzo.com>,
	 Andy Lutomirski <luto@kernel.org>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	 Arnd Bergmann <arnd@arndb.de>,
	Christoph Hellwig <hch@infradead.org>,
	Christoph Hellwig <hch@lst.de>,
	 darrick.wong@oracle.com, "David S. Miller" <davem@davemloft.net>,
	 Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Eric Biggers <ebiggers@google.com>,
	 Eric Dumazet <edumazet@google.com>,
	ericvh@gmail.com,
	 Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	harry.wentland@amd.com,  Herbert Xu <herbert@gondor.apana.org.au>,
	iii@linux.ibm.com, mingo@elte.hu,
	 Jason Wang <jasowang@redhat.com>, Jens Axboe <axboe@kernel.dk>,
	 Marek Szyprowski <m.szyprowski@samsung.com>,
	Marco Elver <elver@google.com>,
	 Mark Rutland <mark.rutland@arm.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	 Martin Schwidefsky <schwidefsky@de.ibm.com>,
	Matthew Wilcox <willy@infradead.org>,
	 "Michael S . Tsirkin" <mst@redhat.com>,
	Michal Simek <monstr@monstr.eu>,
	pmladek@suse.com,  Qian Cai <cai@lca.pw>,
	Randy Dunlap <rdunlap@infradead.org>,
	Robin Murphy <robin.murphy@arm.com>,
	 sergey.senozhatsky@gmail.com,
	Steven Rostedt <rostedt@goodmis.org>,
	 Takashi Iwai <tiwai@suse.com>, "Theodore Ts'o" <tytso@mit.edu>,
	gor@linux.ibm.com, wsa@the-dreams.de
Subject: Re: [PATCH RFC v3 24/36] kmsan: disable instrumentation of certain functions
Date: Fri, 29 Nov 2019 15:59:05 +0100
Message-ID: <CAAeHK+xU2WGtaitQtO7kSQ7gsXGz72y9dn08WBMtugMPnPkHnw@mail.gmail.com> (raw)
In-Reply-To: <20191122112621.204798-25-glider@google.com>

On Fri, Nov 22, 2019 at 12:27 PM <glider@google.com> wrote:
>
> Some functions are called from handwritten assembly, and therefore don't
> have their arguments' metadata fully set up by the instrumentation code.
> Mark them with __no_sanitize_memory to avoid false positives from
> spreading further.
> Certain functions perform task switching, so that the value of |current|
> is different as they proceed. Because KMSAN state pointer is only read
> once at the beginning of the function, touching it after |current| has
> changed may be dangerous.
>
> Signed-off-by: Alexander Potapenko <glider@google.com>
> To: Alexander Potapenko <glider@google.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Vegard Nossum <vegard.nossum@oracle.com>
> Cc: Dmitry Vyukov <dvyukov@google.com>
> Cc: linux-mm@kvack.org
> ---
> v3:
>  - removed TODOs from comments
>
> Change-Id: I684d23dac5a22eb0a4cea71993cb934302b17cea
> ---
>  arch/x86/entry/common.c                |  1 +
>  arch/x86/include/asm/irq_regs.h        |  1 +
>  arch/x86/include/asm/syscall_wrapper.h |  1 +
>  arch/x86/kernel/apic/apic.c            |  1 +
>  arch/x86/kernel/dumpstack_64.c         |  1 +
>  arch/x86/kernel/process_64.c           |  5 +++++
>  arch/x86/kernel/traps.c                | 12 ++++++++++--
>  arch/x86/kernel/uprobes.c              |  7 ++++++-
>  kernel/profile.c                       |  1 +
>  kernel/sched/core.c                    |  6 ++++++
>  10 files changed, 33 insertions(+), 3 deletions(-)
>
> diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
> index 3f8e22615812..0dd5b2acb355 100644
> --- a/arch/x86/entry/common.c
> +++ b/arch/x86/entry/common.c
> @@ -275,6 +275,7 @@ __visible inline void syscall_return_slowpath(struct pt_regs *regs)
>  }
>
>  #ifdef CONFIG_X86_64
> +__no_sanitize_memory
>  __visible void do_syscall_64(unsigned long nr, struct pt_regs *regs)
>  {
>         struct thread_info *ti;
> diff --git a/arch/x86/include/asm/irq_regs.h b/arch/x86/include/asm/irq_regs.h
> index 187ce59aea28..d65a00bd6f02 100644
> --- a/arch/x86/include/asm/irq_regs.h
> +++ b/arch/x86/include/asm/irq_regs.h
> @@ -14,6 +14,7 @@
>
>  DECLARE_PER_CPU(struct pt_regs *, irq_regs);
>
> +__no_sanitize_memory
>  static inline struct pt_regs *get_irq_regs(void)
>  {
>         return __this_cpu_read(irq_regs);
> diff --git a/arch/x86/include/asm/syscall_wrapper.h b/arch/x86/include/asm/syscall_wrapper.h
> index e046a405743d..43910ce1b53b 100644
> --- a/arch/x86/include/asm/syscall_wrapper.h
> +++ b/arch/x86/include/asm/syscall_wrapper.h
> @@ -159,6 +159,7 @@
>         ALLOW_ERROR_INJECTION(__x64_sys##name, ERRNO);                  \
>         static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));     \
>         static inline long __do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
> +       __no_sanitize_memory                                            \
>         asmlinkage long __x64_sys##name(const struct pt_regs *regs)     \
>         {                                                               \
>                 return __se_sys##name(SC_X86_64_REGS_TO_ARGS(x,__VA_ARGS__));\
> diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
> index 9e2dd2b296cd..7b24bda22c38 100644
> --- a/arch/x86/kernel/apic/apic.c
> +++ b/arch/x86/kernel/apic/apic.c
> @@ -1118,6 +1118,7 @@ static void local_apic_timer_interrupt(void)
>   * [ if a single-CPU system runs an SMP kernel then we call the local
>   *   interrupt as well. Thus we cannot inline the local irq ... ]
>   */
> +__no_sanitize_memory /* |regs| may be uninitialized */

The comment style around __no_sanitize_memory looks very different for
different call sites, perhaps it makes sense to unify it somehow.

>  __visible void __irq_entry smp_apic_timer_interrupt(struct pt_regs *regs)
>  {
>         struct pt_regs *old_regs = set_irq_regs(regs);
> diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
> index 753b8cfe8b8a..ba883d282a43 100644
> --- a/arch/x86/kernel/dumpstack_64.c
> +++ b/arch/x86/kernel/dumpstack_64.c
> @@ -143,6 +143,7 @@ static bool in_irq_stack(unsigned long *stack, struct stack_info *info)
>         return true;
>  }
>
> +__no_sanitize_memory
>  int get_stack_info(unsigned long *stack, struct task_struct *task,
>                    struct stack_info *info, unsigned long *visit_mask)
>  {
> diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
> index af64519b2695..70e33150a83a 100644
> --- a/arch/x86/kernel/process_64.c
> +++ b/arch/x86/kernel/process_64.c
> @@ -500,6 +500,11 @@ void compat_start_thread(struct pt_regs *regs, u32 new_ip, u32 new_sp)
>   * Kprobes not supported here. Set the probe on schedule instead.
>   * Function graph tracer not supported too.
>   */
> +/*
> + * Avoid touching KMSAN state or reporting anything here, as __switch_to() does
> + * weird things with tasks.
> + */
> +__no_sanitize_memory
>  __visible __notrace_funcgraph struct task_struct *
>  __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
>  {
> diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
> index 4bb0f8447112..a94282d1f60b 100644
> --- a/arch/x86/kernel/traps.c
> +++ b/arch/x86/kernel/traps.c
> @@ -618,7 +618,10 @@ NOKPROBE_SYMBOL(do_int3);
>   * Help handler running on a per-cpu (IST or entry trampoline) stack
>   * to switch to the normal thread stack if the interrupted code was in
>   * user mode. The actual stack switch is done in entry_64.S
> + *
> + * This function switches the registers - don't instrument it with KMSAN!
>   */
> +__no_sanitize_memory
>  asmlinkage __visible notrace struct pt_regs *sync_regs(struct pt_regs *eregs)
>  {
>         struct pt_regs *regs = (struct pt_regs *)this_cpu_read(cpu_current_top_of_stack) - 1;
> @@ -634,6 +637,11 @@ struct bad_iret_stack {
>  };
>
>  asmlinkage __visible notrace
> +/*
> + * Dark magic happening here, let's not instrument this function.
> + * Also avoid copying any metadata by using raw __memmove().
> + */
> +__no_sanitize_memory
>  struct bad_iret_stack *fixup_bad_iret(struct bad_iret_stack *s)
>  {
>         /*
> @@ -648,10 +656,10 @@ struct bad_iret_stack *fixup_bad_iret(struct bad_iret_stack *s)
>                 (struct bad_iret_stack *)this_cpu_read(cpu_tss_rw.x86_tss.sp0) - 1;
>
>         /* Copy the IRET target to the new stack. */
> -       memmove(&new_stack->regs.ip, (void *)s->regs.sp, 5*8);
> +       __memmove(&new_stack->regs.ip, (void *)s->regs.sp, 5*8);
>
>         /* Copy the remainder of the stack from the current stack. */
> -       memmove(new_stack, s, offsetof(struct bad_iret_stack, regs.ip));
> +       __memmove(new_stack, s, offsetof(struct bad_iret_stack, regs.ip));

Looks like this change should go into a separate patch.

>
>         BUG_ON(!user_mode(&new_stack->regs));
>         return new_stack;
> diff --git a/arch/x86/kernel/uprobes.c b/arch/x86/kernel/uprobes.c
> index 8cd745ef8c7b..bcd4bf5a909f 100644
> --- a/arch/x86/kernel/uprobes.c
> +++ b/arch/x86/kernel/uprobes.c
> @@ -8,6 +8,7 @@
>   *     Jim Keniston
>   */
>  #include <linux/kernel.h>
> +#include <linux/kmsan-checks.h>
>  #include <linux/sched.h>
>  #include <linux/ptrace.h>
>  #include <linux/uprobes.h>
> @@ -997,9 +998,13 @@ int arch_uprobe_post_xol(struct arch_uprobe *auprobe, struct pt_regs *regs)
>  int arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data)
>  {
>         struct die_args *args = data;
> -       struct pt_regs *regs = args->regs;
> +       struct pt_regs *regs;
>         int ret = NOTIFY_DONE;
>
> +       kmsan_unpoison_shadow(args, sizeof(*args));
> +       regs = args->regs;
> +       if (regs)
> +               kmsan_unpoison_shadow(regs, sizeof(*regs));

This one as well.

>         /* We are only interested in userspace traps */
>         if (regs && !user_mode(regs))
>                 return NOTIFY_DONE;
> diff --git a/kernel/profile.c b/kernel/profile.c
> index af7c94bf5fa1..835a5b66d1a4 100644
> --- a/kernel/profile.c
> +++ b/kernel/profile.c
> @@ -399,6 +399,7 @@ void profile_hits(int type, void *__pc, unsigned int nr_hits)
>  }
>  EXPORT_SYMBOL_GPL(profile_hits);
>
> +__no_sanitize_memory
>  void profile_tick(int type)
>  {
>         struct pt_regs *regs = get_irq_regs();
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index dd05a378631a..674d36fe9d44 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -475,6 +475,7 @@ void wake_q_add_safe(struct wake_q_head *head, struct task_struct *task)
>                 put_task_struct(task);
>  }
>
> +__no_sanitize_memory /* context switching here */
>  void wake_up_q(struct wake_q_head *head)
>  {
>         struct wake_q_node *node = head->first;
> @@ -3180,6 +3181,7 @@ prepare_task_switch(struct rq *rq, struct task_struct *prev,
>   * past. prev == current is still correct but we need to recalculate this_rq
>   * because prev may have moved to another CPU.
>   */
> +__no_sanitize_memory /* |current| changes here */
>  static struct rq *finish_task_switch(struct task_struct *prev)
>         __releases(rq->lock)
>  {
> @@ -3986,6 +3988,7 @@ pick_next_task(struct rq *rq, struct task_struct *prev, struct rq_flags *rf)
>   *
>   * WARNING: must be called with preemption disabled!
>   */
> +__no_sanitize_memory /* |current| changes here */
>  static void __sched notrace __schedule(bool preempt)
>  {
>         struct task_struct *prev, *next;
> @@ -4605,6 +4608,7 @@ int task_prio(const struct task_struct *p)
>   *
>   * Return: 1 if the CPU is currently idle. 0 otherwise.
>   */
> +__no_sanitize_memory /* nothing to report here */
>  int idle_cpu(int cpu)
>  {
>         struct rq *rq = cpu_rq(cpu);
> @@ -6544,6 +6548,7 @@ static struct kmem_cache *task_group_cache __read_mostly;
>  DECLARE_PER_CPU(cpumask_var_t, load_balance_mask);
>  DECLARE_PER_CPU(cpumask_var_t, select_idle_mask);
>
> +__no_sanitize_memory
>  void __init sched_init(void)
>  {
>         unsigned long ptr = 0;
> @@ -6716,6 +6721,7 @@ static inline int preempt_count_equals(int preempt_offset)
>         return (nested == preempt_offset);
>  }
>
> +__no_sanitize_memory /* expect the arguments to be initialized */
>  void __might_sleep(const char *file, int line, int preempt_offset)
>  {
>         /*
> --
> 2.24.0.432.g9d3f5f5b63-goog
>


  reply index

Thread overview: 120+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-22 11:25 [PATCH RFC v3 00/36] Add KernelMemorySanitizer infrastructure glider
2019-11-22 11:25 ` [PATCH RFC v3 01/36] stackdepot: check depot_index before accessing the stack slab glider
2019-11-27 14:22   ` Marco Elver
2019-11-22 11:25 ` [PATCH RFC v3 02/36] stackdepot: build with -fno-builtin glider
2019-11-27 14:22   ` Marco Elver
2019-11-22 11:25 ` [PATCH RFC v3 03/36] kasan: stackdepot: move filter_irq_stacks() to stackdepot.c glider
2019-11-27 14:22   ` Marco Elver
2019-11-27 14:56     ` Alexander Potapenko
2019-11-22 11:25 ` [PATCH RFC v3 04/36] stackdepot: reserve 5 extra bits in depot_stack_handle_t glider
2019-11-27 14:23   ` Marco Elver
2019-11-22 11:25 ` [PATCH RFC v3 05/36] kmsan: add ReST documentation glider
2019-11-27 14:22   ` Marco Elver
2019-12-03 12:42     ` Alexander Potapenko
2019-11-22 11:25 ` [PATCH RFC v3 06/36] kmsan: gfp: introduce __GFP_NO_KMSAN_SHADOW glider
2019-11-27 14:48   ` Marco Elver
2019-12-03 12:57     ` Alexander Potapenko
2019-11-22 11:25 ` [PATCH RFC v3 07/36] kmsan: introduce __no_sanitize_memory and __SANITIZE_MEMORY__ glider
2019-11-28 13:13   ` Marco Elver
2019-11-29 16:09   ` Andrey Konovalov
2019-12-16 11:35     ` Alexander Potapenko
2019-11-22 11:25 ` [PATCH RFC v3 08/36] kmsan: reduce vmalloc space glider
2019-11-28 13:30   ` Marco Elver
2019-11-22 11:25 ` [PATCH RFC v3 09/36] kmsan: add KMSAN bits to struct page and struct task_struct glider
2019-11-28 13:44   ` Marco Elver
2019-11-28 14:05     ` Alexander Potapenko
2019-11-22 11:25 ` [PATCH RFC v3 10/36] kmsan: add KMSAN runtime glider
2019-11-24 19:44   ` Wolfram Sang
2019-11-25  9:14     ` Alexander Potapenko
2019-11-29 16:07   ` Marco Elver
2019-12-19 14:16     ` Alexander Potapenko
2019-12-02 15:39   ` Andrey Konovalov
2019-12-20 18:58     ` Alexander Potapenko
2019-12-03 14:34   ` Andrey Konovalov
2019-11-22 11:25 ` [PATCH RFC v3 11/36] kmsan: stackdepot: don't allocate KMSAN metadata for stackdepot glider
2019-11-29 14:52   ` Andrey Konovalov
2019-12-03 14:27     ` Alexander Potapenko
2019-11-22 11:25 ` [PATCH RFC v3 12/36] kmsan: define READ_ONCE_NOCHECK() glider
2019-12-02 10:03   ` Marco Elver
2019-12-03 12:45     ` Alexander Potapenko
2019-11-22 11:25 ` [PATCH RFC v3 13/36] kmsan: make READ_ONCE_TASK_STACK() return initialized values glider
2019-12-02 10:07   ` Marco Elver
2019-12-05 15:52     ` Alexander Potapenko
2019-11-22 11:25 ` [PATCH RFC v3 14/36] kmsan: x86: sync metadata pages on page fault glider
2019-11-22 11:26 ` [PATCH RFC v3 15/36] kmsan: add tests for KMSAN glider
2019-11-29 14:14   ` Andrey Konovalov
2019-12-05 14:30     ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 16/36] crypto: kmsan: disable accelerated configs under KMSAN glider
2019-12-02 13:25   ` Marco Elver
2019-12-05 14:51     ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 17/36] kmsan: x86: disable UNWINDER_ORC " glider
2019-12-02 13:30   ` Marco Elver
2019-11-22 11:26 ` [PATCH RFC v3 18/36] kmsan: disable LOCK_DEBUGGING_SUPPORT glider
2019-12-02 13:33   ` Marco Elver
2019-12-03 14:34     ` Alexander Potapenko
2019-12-03 15:00       ` Qian Cai
2019-12-03 15:14         ` Alexander Potapenko
2019-12-03 18:02           ` Qian Cai
2019-12-03 18:38           ` Steven Rostedt
2019-12-04  8:41             ` Alexander Potapenko
2019-12-04 12:22               ` Petr Mladek
2019-12-04 13:12                 ` Qian Cai
2019-12-04 16:24                   ` Alexander Potapenko
2019-12-04 18:03                     ` Qian Cai
2019-11-22 11:26 ` [PATCH RFC v3 20/36] kmsan: x86: increase stack sizes in KMSAN builds glider
2019-12-02 14:31   ` Marco Elver
2019-11-22 11:26 ` [PATCH RFC v3 21/36] kmsan: disable KMSAN instrumentation for certain kernel parts glider
2019-11-29 15:07   ` Andrey Konovalov
2019-12-10 10:35     ` Alexander Potapenko
2019-12-10 12:38       ` Alexander Potapenko
2019-12-10 12:43       ` Qian Cai
2019-11-22 11:26 ` [PATCH RFC v3 22/36] kmsan: mm: call KMSAN hooks from SLUB code glider
2019-12-02 15:36   ` Marco Elver
2019-12-10 12:07     ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 23/36] kmsan: call KMSAN hooks where needed glider
2019-11-26 10:17   ` Petr Mladek
2019-11-26 10:52     ` Alexander Potapenko
2019-11-29 16:21   ` Andrey Konovalov
2019-12-16 11:30     ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 24/36] kmsan: disable instrumentation of certain functions glider
2019-11-29 14:59   ` Andrey Konovalov [this message]
2019-12-18 10:02     ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 25/36] kmsan: unpoison |tlb| in arch_tlb_gather_mmu() glider
2019-11-29 15:08   ` Andrey Konovalov
2019-12-03 14:19     ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 26/36] kmsan: use __msan_memcpy() where possible glider
2019-11-29 15:13   ` Andrey Konovalov
2019-12-05 15:46     ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 27/36] kmsan: hooks for copy_to_user() and friends glider
2019-11-29 15:34   ` Andrey Konovalov
2019-12-05 16:00     ` Alexander Potapenko
2019-12-05 16:44       ` Andrey Konovalov
2019-12-11 14:22         ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 28/36] kmsan: enable KMSAN builds glider
2019-11-29 15:55   ` Andrey Konovalov
2019-12-11 12:51     ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 29/36] kmsan: handle /dev/[u]random glider
2019-11-22 11:26 ` [PATCH RFC v3 30/36] kmsan: virtio: check/unpoison scatterlist in vring_map_one_sg() glider
2019-11-22 11:26 ` [PATCH RFC v3 31/36] kmsan: disable strscpy() optimization under KMSAN glider
2019-12-02 15:51   ` Marco Elver
2019-12-02 16:23     ` Alexander Potapenko
2019-12-03 11:19       ` Alexander Potapenko
2019-12-03 11:24         ` Marco Elver
2019-12-03 11:27           ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 32/36] kmsan: add iomap support glider
2019-12-03 12:50   ` Marco Elver
2019-12-03 14:07     ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 33/36] kmsan: dma: unpoison memory mapped by dma_direct_map_page() glider
2019-11-22 11:26 ` [PATCH RFC v3 34/36] kmsan: disable physical page merging in biovec glider
2019-12-03 12:54   ` Marco Elver
2019-12-03 13:38     ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 35/36] kmsan: ext4: skip block merging logic in ext4_mpage_readpages for KMSAN glider
2019-11-25 16:05   ` Robin Murphy
2019-11-25 17:03     ` Alexander Potapenko
2019-12-03 14:22   ` Marco Elver
2019-12-05 14:31     ` Alexander Potapenko
2019-11-22 11:26 ` [PATCH RFC v3 36/36] net: kasan: kmsan: support CONFIG_GENERIC_CSUM on x86, enable it for KASAN/KMSAN glider
2019-12-03 14:17   ` Marco Elver
2019-12-05 14:37     ` Alexander Potapenko
2019-11-29 14:39 ` [PATCH RFC v3 00/36] Add KernelMemorySanitizer infrastructure Marco Elver
2019-12-02 16:02   ` Alexander Potapenko

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Linux-mm Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-mm/0 linux-mm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-mm linux-mm/ https://lore.kernel.org/linux-mm \
		linux-mm@kvack.org
	public-inbox-index linux-mm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kvack.linux-mm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git