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Stanislaw Gruszka a1da08993f lib/div64.c: off by one in shift 
commit cdc94a37493135e355dfc0b0e086d84e3eadb50d upstream.

fls counts bits starting from 1 to 32 (returns 0 for zero argument).  If
we add 1 we shift right one bit more and loose precision from divisor,
what cause function incorect results with some numbers.

Corrected code was tested in user-space, see bugzilla:
   https://bugzilla.kernel.org/show_bug.cgi?id=202391

Link: http://lkml.kernel.org/r/1548686944-11891-1-git-send-email-sgruszka@redhat.com
Fixes: 658716d19f ("div64_u64(): improve precision on 32bit platforms")
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Reported-by: Siarhei Volkau <lis8215@gmail.com>
Tested-by: Siarhei Volkau <lis8215@gmail.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
 		2019-07-27 22:11:26 +02:00
..
lz4 lz4: fix another possible overrun 2016-05-18 14:34:38 +05:30
lzo lzo: check for length overrun in variable length encoding. 2014-10-30 09:35:11 -07:00
mpi Import latest Samsung release 2017-04-18 03:43:52 +02:00
raid6 lib/raid6: build proper files on corresponding arch 2012-12-13 19:51:04 +11:00
reed_solomon
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xz decompressors: fix typo "POWERPC" 2013-03-13 15:21:48 -07:00
zlib_deflate
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zlib_inflate
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.gitignore
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Kconfig lib: add lz4 compressor module 2015-09-16 18:20:12 +05:30
Kconfig.debug mm,vmacache: add debug data 2019-07-27 22:08:07 +02:00
Kconfig.kasan kasan: enable instrumentation of global variables 2015-05-04 14:03:57 -07:00
Kconfig.kgdb KGDB/KDB fixes and cleanups 2013-03-02 08:31:39 -08:00
Kconfig.kmemcheck
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Makefile lib: add lz4 compressor module 2015-09-16 18:20:12 +05:30
argv_split.c argv_split(): teach it to handle mutable strings 2013-04-29 18:28:19 -07:00
asn1_decoder.c BACKPORT: ASN.1: fix out-of-bounds read when parsing indefinite length item 2019-07-27 21:50:02 +02:00
atomic64.c lib: atomic64: Initialize locks statically to fix early users 2012-12-20 13:50:16 -08:00
atomic64_test.c
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audit.c
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average.c
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bcd.c
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bch.c
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bitmap.c Merge remote-tracking branch 'f2fs/linux-3.10.y' into HEAD 2017-04-18 17:02:28 +02:00
bitrev.c
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bsearch.c
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btree.c lib/btree.c: fix leak of whole btree nodes 2014-08-07 14:30:27 -07:00
bug.c Import latest Samsung release 2017-04-18 03:43:52 +02:00
build_OID_registry
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bust_spinlocks.c printk: Provide a wake_up_klogd() off-case 2013-03-22 16:41:20 -07:00
check_signature.c
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checksum.c lib/checksum.c: fix build for generic csum_tcpudp_nofold 2015-02-11 14:48:17 +08:00
clz_tab.c
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cmdline.c lib/cmdline.c: fix get_options() overflow while parsing ranges 2019-07-27 21:44:24 +02:00
cordic.c
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cpu-notifier-error-inject.c
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cpu_rmap.c irq: Allow multiple clients to register for irq affinity notification 2014-11-09 15:17:27 -08:00
cpumask.c sched/fair, cpumask: Export for_each_cpu_wrap() 2019-07-27 21:44:52 +02:00
crc-ccitt.c
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crc-itu-t.c
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crc-t10dif.c
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crc7.c
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crc8.c
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crc16.c
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crc32.c
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crc32defs.h
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ctype.c
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debug_locks.c
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debugobjects.c debugobjects: use kmemleak_not_leak for obj_cache 2015-05-29 19:35:14 +05:30
dec_and_lock.c
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decompress.c lib/decompress.c: fix initconst 2013-04-30 17:04:09 -07:00
decompress_bunzip2.c decompress_bunzip2: off by one in get_next_block() 2015-01-27 07:52:33 -08:00
decompress_inflate.c lib/decompressors: fix "no limit" output buffer length 2014-02-06 11:08:12 -08:00
decompress_unlzma.c
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decompress_unlzo.c lib/lzo: Rename lzo1x_decompress.c to lzo1x_decompress_safe.c 2013-02-20 19:36:00 +01:00
decompress_unxz.c
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devres.c devres: always use dev_name() in devm_ioremap_resource() 2019-07-27 22:11:19 +02:00
digsig.c lib/digsig: fix dereference of NULL user_key_payload 2019-07-27 21:44:22 +02:00
div64.c lib/div64.c: off by one in shift 2019-07-27 22:11:26 +02:00
dma-debug.c dma-debug: switch check from _text to _stext 2016-02-25 11:57:49 -08:00
dump_stack.c dump_stack: consolidate dump_stack() implementations and unify their behaviors 2013-04-30 17:04:02 -07:00
dynamic_debug.c dynamic_debug: Handle kstrdup failure in dynamic_debug_init 2015-06-20 18:25:48 -07:00
dynamic_queue_limits.c
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earlycpio.c
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extable.c
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fault-inject.c debugfs: add get/set for atomic types 2013-10-18 18:13:21 -07:00
fdt.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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find_last_bit.c
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find_next_bit.c
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flex_array.c
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flex_proportions.c
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gcd.c
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gen_crc32table.c
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genalloc.c Merge upstream linux-stable v3.10.28 into msm-3.10 2014-03-24 14:28:34 -07:00
halfmd4.c
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hexdump.c dynamic_debug: dynamic hex dump 2013-01-17 12:19:09 -08:00
hweight.c
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idr.c idr: fix overflow bug during maximum ID calculation at maximum height 2014-06-30 20:09:42 -07:00
inflate.c
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int_sqrt.c lib/int_sqrt: optimize small argument 2019-07-27 21:46:05 +02:00
interval_tree.c
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interval_tree_test_main.c random32: rename random32 to prandom 2012-12-17 17:15:26 -08:00
iomap.c lib: iomap: Add MSM RTB support 2014-09-04 19:40:43 -07:00
iomap_copy.c
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iommu-helper.c
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ioremap.c
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iovec.c Hoist memcpy_fromiovec/memcpy_toiovec into lib/ 2013-05-20 10:24:22 +09:30
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() 2019-07-27 22:09:23 +02:00
jedec_ddr_data.c
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kasprintf.c
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kfifo.c kfifo: fix kfifo_alloc() and kfifo_init() 2013-02-27 19:10:23 -08:00
klist.c klist: fix starting point removed bug in klist iterators 2016-02-25 11:57:47 -08:00
kobject.c kref: minor cleanup 2013-05-07 16:09:00 -07:00
kobject_uevent.c
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kstrtox.c kstrto*: add documentation 2012-12-17 17:15:22 -08:00
kstrtox.h
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lcm.c
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libcrc32c.c
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list_debug.c kernel/lib: add additional debug capabilites for data corruption 2013-08-22 18:08:50 -07:00
list_sort.c lib/: rename random32() to prandom_u32() 2013-04-29 18:28:42 -07:00
llist.c
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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 lockdep: Selftest: convert spinlock to raw spinlock 2013-02-19 08:43:35 +01:00
lru_cache.c lru_cache: introduce lc_get_cumulative() 2013-03-22 22:17:36 -06:00
md5.c
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memory-notifier-error-inject.c
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memweight.c
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nlattr.c netlink: rate-limit leftover bytes warning and print process name 2014-06-26 15:12:37 -04:00
notifier-error-inject.c mode_t, whack-a-mole at 11... 2013-04-09 14:13:05 -04:00
notifier-error-inject.h
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of-reconfig-notifier-error-inject.c powerpc+of: Rename and fix OF reconfig notifier error inject module 2012-12-14 10:32:52 +11:00
oid_registry.c Give the OID registry file module info to avoid kernel tainting 2013-05-05 14:38:00 -07:00
parser.c lib/parser.c: fix up comments for valid return values from match_number 2013-02-21 17:22:25 -08:00
pci_iomap.c
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percpu_counter.c
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plist.c
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pm-notifier-error-inject.c
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prio_heap.c
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proportions.c
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qmi_encdec.c This is the 3.10.84 stable release 2015-09-30 13:25:40 +05:30
qmi_encdec_priv.h lib: qmi: Introduce QMI Encode/Decode library 2013-09-04 15:34:45 -07:00
radix-tree.c radix-tree: fix race in gang lookup 2016-02-25 11:57:49 -08:00
random32.c random32: include missing header file 2017-09-08 18:50:21 +00:00
ratelimit.c Import latest Samsung release 2017-04-18 03:43:52 +02:00
rational.c
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rbtree.c rbtree: add postorder iteration functions 2015-09-16 18:20:19 +05:30
rbtree_test.c rbtree_test: add __init/__exit annotations 2013-04-30 17:04:07 -07:00
reciprocal_div.c
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scatterlist.c Merge upstream linux-stable v3.10.28 into msm-3.10 2014-03-24 14:28:34 -07:00
sha1.c
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show_mem.c mm, show_mem: suppress page counts in non-blockable contexts 2013-04-29 15:54:28 -07:00
smp_processor_id.c
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sort.c
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stmp_device.c
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string.c lib/string.c: remove duplicated function 2019-07-27 22:09:02 +02:00
string_helpers.c lib/string_helpers: introduce generic string_unescape 2013-04-30 17:04:03 -07:00
strncpy_from_user.c
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strnlen_user.c lib: Fix strnlen_user() to not touch memory after specified maximum 2015-06-05 23:19:54 -07:00
swiotlb.c swiotlb: Setting default IO TBL value to 1MB 2014-06-02 08:46:43 -07:00
syscall.c
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test-kstrtox.c
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test-string_helpers.c lib/string_helpers: introduce generic string_unescape 2013-04-30 17:04:03 -07:00
textsearch.c
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timerqueue.c
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ts_bm.c
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ts_fsm.c
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ts_kmp.c
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ucs2_string.c lib/ucs2_string: Correct ucs2 -> utf8 conversion 2016-03-16 08:41:37 -07:00
usercopy.c Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS 2013-04-30 17:04:09 -07:00
uuid.c uuid: use prandom_bytes() 2013-04-29 18:28:42 -07:00
vsprintf.c vsprintf: ignore %n again 2014-05-30 10:23:23 -07:00