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From: glider@google.com
To: Alexander Viro <viro@zeniv.linux.org.uk>,
	Vegard Nossum <vegard.nossum@oracle.com>,
	 Dmitry Vyukov <dvyukov@google.com>,
	linux-mm@kvack.org
Cc: glider@google.com, adilger.kernel@dilger.ca,
	akpm@linux-foundation.org,  andreyknvl@google.com,
	aryabinin@virtuozzo.com, luto@kernel.org,
	 ard.biesheuvel@linaro.org, arnd@arndb.de, hch@infradead.org,
	hch@lst.de,  darrick.wong@oracle.com, davem@davemloft.net,
	dmitry.torokhov@gmail.com,  ebiggers@google.com,
	edumazet@google.com, ericvh@gmail.com,
	 gregkh@linuxfoundation.org, harry.wentland@amd.com,
	 herbert@gondor.apana.org.au, iii@linux.ibm.com, mingo@elte.hu,
	 jasowang@redhat.com, axboe@kernel.dk, m.szyprowski@samsung.com,
	 elver@google.com, mark.rutland@arm.com,
	martin.petersen@oracle.com,  schwidefsky@de.ibm.com,
	willy@infradead.org, mst@redhat.com, monstr@monstr.eu,
	 pmladek@suse.com, cai@lca.pw, rdunlap@infradead.org,
	robin.murphy@arm.com,  sergey.senozhatsky@gmail.com,
	rostedt@goodmis.org, tiwai@suse.com,  tytso@mit.edu,
	tglx@linutronix.de, gor@linux.ibm.com, wsa@the-dreams.de
Subject: [PATCH RFC v3 27/36] kmsan: hooks for copy_to_user() and friends
Date: Fri, 22 Nov 2019 12:26:12 +0100
Message-ID: <20191122112621.204798-28-glider@google.com> (raw)
In-Reply-To: <20191122112621.204798-1-glider@google.com>

Memory that is copied from userspace must be unpoisoned.
Before copying memory to userspace, check it and report an error if it
contains uninitialized bits.

Signed-off-by: Alexander Potapenko <glider@google.com>
To: Alexander Potapenko <glider@google.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: linux-mm@kvack.org
---
v3:
 - fixed compilation errors reported by kbuild test bot

Change-Id: I38428b9c7d1909b8441dcec1749b080494a7af99
---
 arch/x86/include/asm/uaccess.h   | 12 ++++++++++++
 include/asm-generic/cacheflush.h |  7 ++++++-
 include/asm-generic/uaccess.h    | 12 ++++++++++--
 include/linux/uaccess.h          | 32 +++++++++++++++++++++++++++-----
 lib/iov_iter.c                   |  6 ++++++
 lib/usercopy.c                   |  6 +++++-
 6 files changed, 66 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index 61d93f062a36..ac4b26583f7c 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -6,6 +6,7 @@
  */
 #include <linux/compiler.h>
 #include <linux/kasan-checks.h>
+#include <linux/kmsan-checks.h>
 #include <linux/string.h>
 #include <asm/asm.h>
 #include <asm/page.h>
@@ -174,6 +175,7 @@ __typeof__(__builtin_choose_expr(sizeof(x) > sizeof(0UL), 0ULL, 0UL))
 			ASM_CALL_CONSTRAINT				\
 		     : "0" (ptr), "i" (sizeof(*(ptr))));		\
 	(x) = (__force __typeof__(*(ptr))) __val_gu;			\
+	kmsan_unpoison_shadow(&(x), sizeof(*(ptr)));			\
 	__builtin_expect(__ret_gu, 0);					\
 })
 
@@ -248,6 +250,7 @@ extern void __put_user_8(void);
 	__chk_user_ptr(ptr);					\
 	might_fault();						\
 	__pu_val = x;						\
+	kmsan_check_memory(&(__pu_val), sizeof(*(ptr)));	\
 	switch (sizeof(*(ptr))) {				\
 	case 1:							\
 		__put_user_x(1, __pu_val, ptr, __ret_pu);	\
@@ -270,7 +273,9 @@ extern void __put_user_8(void);
 
 #define __put_user_size(x, ptr, size, label)				\
 do {									\
+	__typeof__(*(ptr)) __pus_val = x;				\
 	__chk_user_ptr(ptr);						\
+	kmsan_check_memory(&(__pus_val), size);				\
 	switch (size) {							\
 	case 1:								\
 		__put_user_goto(x, ptr, "b", "b", "iq", label);	\
@@ -295,7 +300,10 @@ do {									\
  */
 #define __put_user_size_ex(x, ptr, size)				\
 do {									\
+	__typeof__(*(ptr)) __puse_val;					\
 	__chk_user_ptr(ptr);						\
+	__puse_val = x;							\
+	kmsan_check_memory(&(__puse_val), size);			\
 	switch (size) {							\
 	case 1:								\
 		__put_user_asm_ex(x, ptr, "b", "b", "iq");		\
@@ -363,6 +371,7 @@ do {									\
 	default:							\
 		(x) = __get_user_bad();					\
 	}								\
+	kmsan_unpoison_shadow(&(x), size);				\
 } while (0)
 
 #define __get_user_asm(x, addr, err, itype, rtype, ltype, errret)	\
@@ -413,6 +422,7 @@ do {									\
 	default:							\
 		(x) = __get_user_bad();					\
 	}								\
+	kmsan_unpoison_shadow(&(x), size);				\
 } while (0)
 
 #define __get_user_asm_ex(x, addr, itype, rtype, ltype)			\
@@ -428,11 +438,13 @@ do {									\
 #define __put_user_nocheck(x, ptr, size)			\
 ({								\
 	__label__ __pu_label;					\
+	__typeof__(*(ptr)) __pun_val = x;			\
 	int __pu_err = -EFAULT;					\
 	__typeof__(*(ptr)) __pu_val = (x);			\
 	__typeof__(ptr) __pu_ptr = (ptr);			\
 	__typeof__(size) __pu_size = (size);			\
 	__uaccess_begin();					\
+	kmsan_check_memory(&(__pun_val), size);			\
 	__put_user_size(__pu_val, __pu_ptr, __pu_size, __pu_label);	\
 	__pu_err = 0;						\
 __pu_label:							\
diff --git a/include/asm-generic/cacheflush.h b/include/asm-generic/cacheflush.h
index a950a22c4890..707531dccf5e 100644
--- a/include/asm-generic/cacheflush.h
+++ b/include/asm-generic/cacheflush.h
@@ -4,6 +4,7 @@
 
 /* Keep includes the same across arches.  */
 #include <linux/mm.h>
+#include <linux/kmsan-checks.h>
 
 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
 
@@ -72,10 +73,14 @@ static inline void flush_cache_vunmap(unsigned long start, unsigned long end)
 
 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
 	do { \
+		kmsan_check_memory(src, len); \
 		memcpy(dst, src, len); \
 		flush_icache_user_range(vma, page, vaddr, len); \
 	} while (0)
 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
-	memcpy(dst, src, len)
+	do { \
+		memcpy(dst, src, len); \
+		kmsan_unpoison_shadow(dst, len); \
+	} while (0)
 
 #endif /* __ASM_CACHEFLUSH_H */
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h
index e935318804f8..508ee649aeef 100644
--- a/include/asm-generic/uaccess.h
+++ b/include/asm-generic/uaccess.h
@@ -142,7 +142,11 @@ static inline int __access_ok(unsigned long addr, unsigned long size)
 
 static inline int __put_user_fn(size_t size, void __user *ptr, void *x)
 {
-	return unlikely(raw_copy_to_user(ptr, x, size)) ? -EFAULT : 0;
+	int n;
+
+	n = raw_copy_to_user(ptr, x, size);
+	kmsan_copy_to_user(ptr, x, size, n);
+	return unlikely(n) ? -EFAULT : 0;
 }
 
 #define __put_user_fn(sz, u, k)	__put_user_fn(sz, u, k)
@@ -203,7 +207,11 @@ extern int __put_user_bad(void) __attribute__((noreturn));
 #ifndef __get_user_fn
 static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
 {
-	return unlikely(raw_copy_from_user(x, ptr, size)) ? -EFAULT : 0;
+	int copied, to_copy = size;
+
+	copied = raw_copy_from_user(x, ptr, size);
+	kmsan_unpoison_shadow(x, to_copy - copied);
+	return unlikely(copied) ? -EFAULT : 0;
 }
 
 #define __get_user_fn(sz, u, k)	__get_user_fn(sz, u, k)
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index d4ee6e942562..7550d11a8077 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -5,6 +5,7 @@
 #include <linux/sched.h>
 #include <linux/thread_info.h>
 #include <linux/kasan-checks.h>
+#include <linux/kmsan-checks.h>
 
 #define uaccess_kernel() segment_eq(get_fs(), KERNEL_DS)
 
@@ -58,18 +59,26 @@
 static __always_inline __must_check unsigned long
 __copy_from_user_inatomic(void *to, const void __user *from, unsigned long n)
 {
+	unsigned long to_copy = n;
+
 	kasan_check_write(to, n);
 	check_object_size(to, n, false);
-	return raw_copy_from_user(to, from, n);
+	n = raw_copy_from_user(to, from, n);
+	kmsan_unpoison_shadow(to, to_copy - n);
+	return n;
 }
 
 static __always_inline __must_check unsigned long
 __copy_from_user(void *to, const void __user *from, unsigned long n)
 {
+	unsigned long to_copy = n;
+
 	might_fault();
 	kasan_check_write(to, n);
 	check_object_size(to, n, false);
-	return raw_copy_from_user(to, from, n);
+	n = raw_copy_from_user(to, from, n);
+	kmsan_unpoison_shadow(to, to_copy - n);
+	return n;
 }
 
 /**
@@ -88,29 +97,39 @@ __copy_from_user(void *to, const void __user *from, unsigned long n)
 static __always_inline __must_check unsigned long
 __copy_to_user_inatomic(void __user *to, const void *from, unsigned long n)
 {
+	unsigned long to_copy = n;
+
 	kasan_check_read(from, n);
 	check_object_size(from, n, true);
-	return raw_copy_to_user(to, from, n);
+	n = raw_copy_to_user(to, from, n);
+	kmsan_copy_to_user((const void *)to, from, to_copy, n);
+	return n;
 }
 
 static __always_inline __must_check unsigned long
 __copy_to_user(void __user *to, const void *from, unsigned long n)
 {
+	unsigned long to_copy = n;
+
 	might_fault();
 	kasan_check_read(from, n);
 	check_object_size(from, n, true);
-	return raw_copy_to_user(to, from, n);
+	n = raw_copy_to_user(to, from, n);
+	kmsan_copy_to_user((const void *)to, from, to_copy, n);
+	return n;
 }
 
 #ifdef INLINE_COPY_FROM_USER
 static inline __must_check unsigned long
 _copy_from_user(void *to, const void __user *from, unsigned long n)
 {
-	unsigned long res = n;
+	unsigned long res = n, to_copy = n;
+
 	might_fault();
 	if (likely(access_ok(from, n))) {
 		kasan_check_write(to, n);
 		res = raw_copy_from_user(to, from, n);
+		kmsan_unpoison_shadow(to, to_copy - res);
 	}
 	if (unlikely(res))
 		memset(to + (n - res), 0, res);
@@ -125,10 +144,13 @@ _copy_from_user(void *, const void __user *, unsigned long);
 static inline __must_check unsigned long
 _copy_to_user(void __user *to, const void *from, unsigned long n)
 {
+	unsigned long to_copy = n;
+
 	might_fault();
 	if (access_ok(to, n)) {
 		kasan_check_read(from, n);
 		n = raw_copy_to_user(to, from, n);
+		kmsan_copy_to_user(to, from, to_copy, n);
 	}
 	return n;
 }
diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 639d5e7014c1..f038676068b2 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -137,18 +137,24 @@
 
 static int copyout(void __user *to, const void *from, size_t n)
 {
+	size_t to_copy = n;
+
 	if (access_ok(to, n)) {
 		kasan_check_read(from, n);
 		n = raw_copy_to_user(to, from, n);
+		kmsan_copy_to_user(to, from, to_copy, n);
 	}
 	return n;
 }
 
 static int copyin(void *to, const void __user *from, size_t n)
 {
+	size_t to_copy = n;
+
 	if (access_ok(from, n)) {
 		kasan_check_write(to, n);
 		n = raw_copy_from_user(to, from, n);
+		kmsan_unpoison_shadow(to, to_copy - n);
 	}
 	return n;
 }
diff --git a/lib/usercopy.c b/lib/usercopy.c
index cbb4d9ec00f2..abfd93edecba 100644
--- a/lib/usercopy.c
+++ b/lib/usercopy.c
@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <linux/kmsan-checks.h>
 #include <linux/uaccess.h>
 #include <linux/bitops.h>
 
@@ -7,11 +8,12 @@
 #ifndef INLINE_COPY_FROM_USER
 unsigned long _copy_from_user(void *to, const void __user *from, unsigned long n)
 {
-	unsigned long res = n;
+	unsigned long res = n, to_copy = n;
 	might_fault();
 	if (likely(access_ok(from, n))) {
 		kasan_check_write(to, n);
 		res = raw_copy_from_user(to, from, n);
+		kmsan_unpoison_shadow(to, to_copy - res);
 	}
 	if (unlikely(res))
 		memset(to + (n - res), 0, res);
@@ -23,10 +25,12 @@ EXPORT_SYMBOL(_copy_from_user);
 #ifndef INLINE_COPY_TO_USER
 unsigned long _copy_to_user(void __user *to, const void *from, unsigned long n)
 {
+	unsigned long to_copy = n;
 	might_fault();
 	if (likely(access_ok(to, n))) {
 		kasan_check_read(from, n);
 		n = raw_copy_to_user(to, from, n);
+		kmsan_copy_to_user(to, from, to_copy, n);
 	}
 	return n;
 }
-- 
2.24.0.432.g9d3f5f5b63-goog



  parent 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
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 ` glider [this message]
2019-11-29 15:34   ` [PATCH RFC v3 27/36] kmsan: hooks for copy_to_user() and friends 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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    --in-reply-to=20191122112621.204798-28-glider@google.com \
    --to=glider@google.com \
    --cc=adilger.kernel@dilger.ca \
    --cc=akpm@linux-foundation.org \
    --cc=andreyknvl@google.com \
    --cc=ard.biesheuvel@linaro.org \
    --cc=arnd@arndb.de \
    --cc=aryabinin@virtuozzo.com \
    --cc=axboe@kernel.dk \
    --cc=cai@lca.pw \
    --cc=darrick.wong@oracle.com \
    --cc=davem@davemloft.net \
    --cc=dmitry.torokhov@gmail.com \
    --cc=dvyukov@google.com \
    --cc=ebiggers@google.com \
    --cc=edumazet@google.com \
    --cc=elver@google.com \
    --cc=ericvh@gmail.com \
    --cc=gor@linux.ibm.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=harry.wentland@amd.com \
    --cc=hch@infradead.org \
    --cc=hch@lst.de \
    --cc=herbert@gondor.apana.org.au \
    --cc=iii@linux.ibm.com \
    --cc=jasowang@redhat.com \
    --cc=linux-mm@kvack.org \
    --cc=luto@kernel.org \
    --cc=m.szyprowski@samsung.com \
    --cc=mark.rutland@arm.com \
    --cc=martin.petersen@oracle.com \
    --cc=mingo@elte.hu \
    --cc=monstr@monstr.eu \
    --cc=mst@redhat.com \
    --cc=pmladek@suse.com \
    --cc=rdunlap@infradead.org \
    --cc=robin.murphy@arm.com \
    --cc=rostedt@goodmis.org \
    --cc=schwidefsky@de.ibm.com \
    --cc=sergey.senozhatsky@gmail.com \
    --cc=tglx@linutronix.de \
    --cc=tiwai@suse.com \
    --cc=tytso@mit.edu \
    --cc=vegard.nossum@oracle.com \
    --cc=viro@zeniv.linux.org.uk \
    --cc=willy@infradead.org \
    --cc=wsa@the-dreams.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

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