linux

Files

Mark Rutland bf90e56e46 lib: harden strncpy_from_user

The strncpy_from_user() accessor is effectively a copy_from_user()
specialised to copy strings, terminating early at a NUL byte if possible.
In other respects it is identical, and can be used to copy an arbitrarily
large buffer from userspace into the kernel.  Conceptually, it exposes a
similar attack surface.

As with copy_from_user(), we check the destination range when the kernel
is built with KASAN, but unlike copy_from_user() we do not check the
destination buffer when using HARDENED_USERCOPY.  As strncpy_from_user()
calls get_user() in a loop, we must call check_object_size() explicitly.

This patch adds this instrumentation to strncpy_from_user(), per the same
rationale as with the regular copy_from_user().  In the absence of
hardened usercopy this will have no impact as the instrumentation expands
to an empty static inline function.

Link: http://lkml.kernel.org/r/1472221903-31181-1-git-send-email-mark.rutland@arm.com
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2016-10-11 15:06:30 -07:00

842

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2016-03-17 21:38:27 -07:00

fonts

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lz4

lib: lz4: cleanup unaligned access efficiency detection

2016-04-13 09:22:49 -07:00

lzo

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mpi

lib/mpi: Fix SG miter leak

2016-07-29 18:30:16 +08:00

raid6

Merge tag 'md/4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

2016-10-07 09:45:43 -07:00

reed_solomon

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zlib_deflate

zlib_deflate/deftree: remove bi_reverse()

2015-09-10 13:29:01 -07:00

zlib_inflate

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.gitignore

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argv_split.c

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asn1_decoder.c

Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2016-05-17 09:33:39 -07:00

assoc_array.c

assoc_array: don't call compare_object() on a node

2016-04-06 14:06:48 +01:00

atomic64_test.c

atomic64: no need for CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE

2016-10-07 18:46:30 -07:00

atomic64.c

locking/atomic: Implement atomic{,64,_long}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}()

2016-06-16 10:48:32 +02:00

audit.c

syscalls: implement execveat() system call

2014-12-13 12:42:51 -08:00

bcd.c

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bch.c

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bitmap.c

x86/uaccess: Move thread_info::addr_limit to thread_struct

2016-07-15 10:26:30 +02:00

bitrev.c

ARM: 8187/1: add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction

2014-12-22 16:43:06 +00:00

bsearch.c

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btree.c

treewide: Remove old email address

2015-11-23 09:44:58 +01:00

bug.c

lib/bug.c: use common WARN helper

2016-03-17 15:09:34 -07:00

build_OID_registry

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bust_spinlocks.c

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chacha20.c

random: replace non-blocking pool with a Chacha20-based CRNG

2016-07-03 00:57:23 -04:00

check_signature.c

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checksum.c

ipv4: Update parameters for csum_tcpudp_magic to their original types

2016-03-13 23:55:13 -04:00

clz_ctz.c

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clz_tab.c

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cmdline.c

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compat_audit.c

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cordic.c

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cpu_rmap.c

sched/topology: Rename topology_thread_cpumask() to topology_sibling_cpumask()

2015-05-27 15:22:15 +02:00

cpu-notifier-error-inject.c

fault-injection/cpu: Convert to hotplug state machine

2016-09-19 21:44:31 +02:00

cpumask.c

cpumask: Export cpumask_any_but()

2016-02-29 09:35:20 +01:00

crc7.c

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crc8.c

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crc16.c

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crc32.c

crc32: use ktime_get_ns() for measurement

2016-08-02 19:35:08 -04:00

crc32defs.h

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crc-ccitt.c

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crc-itu-t.c

lib: crc-itu-t.[ch] fix 0x0x prefix in integer constants

2015-05-26 15:26:43 +02:00

crc-t10dif.c

lib: introduce crc_t10dif_update()

2015-05-30 22:42:24 -07:00

ctype.c

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debug_info.c

kbuild: include core debug info when DEBUG_INFO_REDUCED

2015-06-11 15:08:32 +02:00

debug_locks.c

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debugobjects.c

debugobjects: insulate non-fixup logic related to static obj from fixup callbacks

2016-05-19 19:12:14 -07:00

dec_and_lock.c

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decompress_bunzip2.c

lib/decompressors: use real out buf size for gunzip with kernel

2015-09-10 13:29:01 -07:00

decompress_inflate.c

lib/decompressors: use real out buf size for gunzip with kernel

2015-09-10 13:29:01 -07:00

decompress_unlz4.c

lib/decompressors: use real out buf size for gunzip with kernel

2015-09-10 13:29:01 -07:00

decompress_unlzma.c

lib/decompress_unlzma: Do a NULL check for pointer

2015-09-10 13:29:01 -07:00

decompress_unlzo.c

lib/decompressors: use real out buf size for gunzip with kernel

2015-09-10 13:29:01 -07:00

decompress_unxz.c

lib/decompressors: use real out buf size for gunzip with kernel

2015-09-10 13:29:01 -07:00

decompress.c

lib/decompress: set the compressor name to NULL on error

2015-07-17 16:39:54 -07:00

devres.c

devres: use to_pci_dev()

2016-02-07 23:17:59 -08:00

digsig.c

lib/digsig: digsig_verify_rsa(): return -EINVAL if modulo length is zero

2016-05-31 16:42:00 +08:00

div64.c

__div64_32(): make it overridable at compile time

2015-11-16 14:42:12 -05:00

dma-debug.c

Merge tag 'dmaengine-4.9-rc1' of git://git.infradead.org/users/vkoul/slave-dma

2016-10-06 17:13:54 -07:00

dma-noop.c

dma-mapping: use unsigned long for dma_attrs

2016-08-04 08:50:07 -04:00

dump_stack.c

dump_stack: avoid potential deadlocks

2016-02-05 18:10:40 -08:00

dynamic_debug.c

dynamic_debug: add jump label support

2016-08-04 08:50:07 -04:00

dynamic_queue_limits.c

lib/dynamic_queue_limits.c: simplify includes

2015-02-12 18:54:15 -08:00

earlycpio.c

lib/cpio: Make find_cpio_data()'s offset arg optional

2016-06-08 11:04:19 +02:00

extable.c

extable: add support for relative extables to search and sort routines

2016-02-24 14:57:26 +00:00

fault-inject.c

fault-inject: fix inverted interval/probability values in printk

2015-10-23 17:55:10 +09:00

fdt_empty_tree.c

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fdt_ro.c

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fdt_rw.c

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fdt_strerror.c

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fdt_sw.c

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fdt_wip.c

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fdt.c

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find_bit.c

lib: rename lib/find_next_bit.c to lib/find_bit.c

2015-04-17 09:03:54 -04:00

flex_array.c

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flex_proportions.c

lib+mm: fix few spelling mistakes

2016-02-15 11:18:23 +01:00

gcd.c

lib/GCD.c: use binary GCD algorithm instead of Euclidean

2016-05-20 17:58:30 -07:00

gen_crc32table.c

lib: crc32: constify crc32 lookup table

2015-02-13 21:21:35 -08:00

genalloc.c

CPM/QE: use genalloc to manage CPM/QE muram

2015-12-22 17:10:18 -06:00

glob.c

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halfmd4.c

lib/halfmd4.c: use rol32 inline function in the ROUND macro

2015-11-06 17:50:42 -08:00

hexdump.c

lib/hexdump.c: truncate output in case of overflow

2015-11-06 17:50:42 -08:00

hweight.c

x86/hweight: Get rid of the special calling convention

2016-06-08 15:01:02 +02:00

idr.c

mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd

2015-11-06 17:50:42 -08:00

inflate.c

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int_sqrt.c

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interval_tree_test.c

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interval_tree.c

lib/interval_tree.c: simplify includes

2015-02-12 18:54:15 -08:00

iomap_copy.c

lib/iomap_copy.c: add __ioread32_copy()

2016-01-20 17:09:18 -08:00

iomap.c

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iommu-common.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc

2015-11-05 16:34:48 -08:00

iommu-helper.c

lib/iommu-helper: skip to next segment

2016-08-02 19:35:07 -04:00

ioremap.c

x86, mm: support huge KVA mappings on x86

2015-04-14 16:49:04 -07:00

iov_iter.c

Fix off-by-one in __pipe_get_pages()

2016-10-11 10:40:01 -07:00

irq_poll.c

lib/irq_poll: Convert to hotplug state machine

2016-09-19 21:44:27 +02:00

irq_regs.c

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is_single_threaded.c

lib/is_single_threaded.c: change current_is_single_threaded() to use for_each_thread()

2015-11-06 17:50:42 -08:00

jedec_ddr_data.c

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kasprintf.c

lib/kasprintf.c: add sanity check to kvasprintf

2016-01-16 11:17:27 -08:00

Kconfig

Merge branch 'akpm' (patches from Andrew)

2016-10-07 21:38:00 -07:00

Kconfig.debug

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2016-10-07 12:24:08 -07:00

Kconfig.kasan

mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB

2016-07-28 16:07:41 -07:00

Kconfig.kgdb

kgdb: depends on VT

2016-05-23 17:04:14 -07:00

Kconfig.kmemcheck

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Kconfig.ubsan

ubsan: allow to disable the null sanitizer

2016-09-20 14:26:08 +02:00

kfifo.c

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klist.c

klist: fix starting point removed bug in klist iterators

2016-02-07 22:18:47 -08:00

kobject_uevent.c

lib/kobject_uevent.c: remove redundant include

2015-02-12 18:54:15 -08:00

kobject.c

kobject: export kset_find_obj() for module use

2016-02-09 17:36:34 -08:00

kstrtox.c

lib: add "on"/"off" support to kstrtobool

2016-03-17 15:09:34 -07:00

kstrtox.h

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lcm.c

block: fix blk_stack_limits() regression due to lcm() change

2015-03-31 09:45:50 -06:00

libcrc32c.c

Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2016-01-22 11:58:43 -08:00

list_debug.c

list: kill list_force_poison()

2016-03-09 15:43:42 -08:00

list_sort.c

lib/list_sort: use late_initcall to hook in self tests

2015-06-16 14:12:35 -04:00

llist.c

lib/llist.c: fix data race in llist_del_first

2015-11-06 17:50:42 -08:00

locking-selftest-hardirq.h

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locking-selftest-mutex.h

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locking-selftest-rlock-hardirq.h

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locking-selftest-rlock-softirq.h

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locking-selftest-rlock.h

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locking-selftest-rsem.h

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locking-selftest-softirq.h

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locking-selftest-spin-hardirq.h

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locking-selftest-spin-softirq.h

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locking-selftest-spin.h

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locking-selftest-wlock-hardirq.h

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locking-selftest-wlock-softirq.h

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locking-selftest-wlock.h

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locking-selftest-wsem.h

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locking-selftest.c

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lockref.c

locking/lockref: Remove homebrew cmpxchg64_relaxed() macro definition

2015-08-12 11:59:04 +02:00

lru_cache.c

lru_cache: Converted lc_seq_printf_status to return void

2015-11-25 09:22:02 -07:00

Makefile

Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block

2016-10-07 14:42:05 -07:00

md5.c

lib/md5.c: simplify include

2015-02-12 18:54:15 -08:00

memory-notifier-error-inject.c

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memweight.c

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net_utils.c

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netdev-notifier-error-inject.c

net: Add support for CHANGEUPPER notifier error injection

2015-12-03 11:49:23 -05:00

nlattr.c

libnl: fix help of _64bit functions

2016-04-23 20:13:24 -04:00

nmi_backtrace.c

nmi_backtrace: generate one-line reports for idle cpus

2016-10-07 18:46:30 -07:00

nodemask.c

include/linux/nodemask.h: create next_node_in() helper

2016-05-19 19:12:14 -07:00

notifier-error-inject.c

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notifier-error-inject.h

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of-reconfig-notifier-error-inject.c

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oid_registry.c

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once.c

once: make helper generic for calling functions once

2015-10-08 05:26:36 -07:00

parser.c

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pci_iomap.c

Merge tag 'libnvdimm-for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

2015-09-08 14:35:59 -07:00

percpu_counter.c

percpu_counter: update debugobjects fixup callbacks return type

2016-05-19 19:12:14 -07:00

percpu_ida.c

mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM

2015-11-06 17:50:42 -08:00

percpu_test.c

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percpu-refcount.c

lib+mm: fix few spelling mistakes

2016-02-15 11:18:23 +01:00

plist.c

lib/plist.c: remove redundant include

2015-02-12 18:54:16 -08:00

pm-notifier-error-inject.c

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radix-tree.c

mm: filemap: don't plant shadow entries without radix tree node

2016-10-05 09:17:56 -07:00

random32.c

lib: clean up put_cpu_var usage

2016-09-27 22:09:17 -04:00

ratelimit.c

ratelimit: extend to print suppressed messages on release

2016-08-02 19:35:06 -04:00

rational.c

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rbtree_test.c

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rbtree.c

Introduce rb_replace_node_rcu()

2016-07-06 10:51:14 +01:00

reciprocal_div.c

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rhashtable.c

rhashtable: Add rhlist interface

2016-09-20 04:43:36 -04:00

sbitmap.c

sbitmap: initialize weight to zero

2016-09-19 08:19:40 -06:00

scatterlist.c

scatterlist: fix a typo in comment block of sg_miter_stop()

2016-02-08 10:15:17 -08:00

seq_buf.c

tracing: Use seq_buf_used() in seq_buf_to_user() instead of len

2015-12-23 14:27:20 -05:00

sg_pool.c

lib: scatterlist: move SG pool code from SCSI driver to lib/sg_pool.c

2016-04-15 16:53:14 -04:00

sg_split.c

lib: scatterlist: add sg splitting function

2015-08-24 14:28:01 -06:00

sha1.c

lib: EXPORT_SYMBOL sha_init

2015-03-23 22:12:08 -04:00

show_mem.c

lib/show_mem.c: correct reserved memory calculation

2015-09-08 15:35:28 -07:00

smp_processor_id.c

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sort.c

lib/sort: Add 64 bit swap function

2015-06-25 17:00:40 -07:00

stackdepot.c

lib/stackdepot.c: use __GFP_NOWARN for stack allocations

2016-07-28 16:07:41 -07:00

stmp_device.c

lib/stmp_device.c: replace module.h include

2015-02-12 18:54:16 -08:00

string_helpers.c

string_helpers: add kstrdup_quotable_file

2016-04-21 10:47:26 +10:00

string.c

lib: move strtobool() to kstrtobool()

2016-03-17 15:09:34 -07:00

strncpy_from_user.c

lib: harden strncpy_from_user

2016-10-11 15:06:30 -07:00

strnlen_user.c

unsafe_[get|put]_user: change interface to use a error target label

2016-08-08 13:02:01 -07:00

swiotlb.c

dma-mapping: use unsigned long for dma_attrs

2016-08-04 08:50:07 -04:00

syscall.c

lib/syscall: Pin the task stack in collect_syscall()

2016-09-16 09:18:53 +02:00

test_bitmap.c

test_bitmap: unit tests for lib/bitmap.c

2016-02-19 22:54:09 -05:00

test_bpf.c

test_bpf: fix the dummy skb after dissector changes

2016-09-15 19:17:15 -04:00

test_firmware.c

test: firmware_class: add asynchronous request trigger

2016-01-07 13:44:22 -07:00

test_hash.c

lib/test_hash.c: fix warning in preprocessor symbol evaluation

2016-09-01 17:52:01 -07:00

test_hexdump.c

test_hexdump: print statistics at the end

2016-01-20 17:09:18 -08:00

test_kasan.c

kasan/tests: add tests for user memory access functions

2016-05-20 17:58:30 -07:00

test_module.c

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test_printf.c

mm, printk: introduce new format string for flags

2016-03-15 16:55:16 -07:00

test_rhashtable.c

rhashtable-test: Fix max_size parameter description

2016-08-08 12:52:42 -07:00

test_static_key_base.c

locking/static_keys: Provide a selftest

2015-08-03 11:51:12 +02:00

test_static_keys.c

locking/static_keys: Avoid nested functions

2016-02-09 10:27:29 +01:00

test_user_copy.c

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test_uuid.c

lib/uuid: add a test module

2016-05-30 15:26:57 -07:00

test-kstrtox.c

kstrto*: accept "-0" for signed conversion

2015-09-10 13:29:01 -07:00

test-string_helpers.c

lib/test-string_helpers.c: fix and improve string_get_size() tests

2016-02-03 08:28:43 -08:00

textsearch.c

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timerqueue.c

timerqueue: Let timerqueue_add/del return information

2015-04-22 17:06:49 +02:00

ts_bm.c

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ts_fsm.c

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ts_kmp.c

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ubsan.c

UBSAN: fix typo in format string

2016-08-02 17:31:41 -04:00

ubsan.h

UBSAN: run-time undefined behavior sanity checker

2016-01-20 17:09:18 -08:00

ucs2_string.c

lib/ucs2_string: Speed up ucs2_utf8size()

2016-09-09 16:08:46 +01:00

uuid.c

lib/uuid.c: use correct offset in uuid parser

2016-05-30 15:26:57 -07:00

vsprintf.c

lib/uuid.c: introduce a few more generic helpers

2016-05-20 17:58:30 -07:00

win_minmax.c

lib/win_minmax: windowed min or max estimator

2016-09-21 00:22:59 -04:00