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Stanislaw Gruszka afac7da6d8 lib/div64.c: off by one in shift 
[ Upstream commit cdc94a3749 ]

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: Sasha Levin <sashal@kernel.org>
2019-04-20 09:07:54 +02:00
..
842
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fonts
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lz4
lz4: fix bogus gcc warning
2017-09-02 07:07:54 +02:00
lzo
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mpi
lib/mpi: Fix umul_ppmm() for MIPS64r6
2018-03-03 10:23:23 +01:00
raid6
ARM: 8833/1: Ensure that NEON code always compiles with Clang
2019-04-05 22:29:11 +02:00
reed_solomon
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xz
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zlib_deflate
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zlib_inflate
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.gitignore
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argv_split.c
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asn1_decoder.c
ASN.1: check for error from ASN1_OP_END__ACT actions
2017-12-14 09:28:12 +01:00
assoc_array.c
assoc_array: Fix shortcut creation
2019-03-23 13:19:42 +01:00
atomic64_test.c
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atomic64.c
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audit.c
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bcd.c
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bch.c
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bitmap.c
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bitrev.c
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bsearch.c
kprobes: Prohibit probing on bsearch()
2019-04-05 22:29:11 +02:00
btree.c
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bug.c
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build_OID_registry
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bust_spinlocks.c
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chacha20.c
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check_signature.c
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checksum.c
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clz_ctz.c
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clz_tab.c
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cmdline.c
lib/cmdline.c: fix get_options() overflow while parsing ranges
2017-06-29 13:00:28 +02:00
compat_audit.c
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cordic.c
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cpu_rmap.c
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cpu-notifier-error-inject.c
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cpumask.c
sched/fair, cpumask: Export for_each_cpu_wrap()
2017-07-21 07:42:23 +02:00
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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crc-ccitt.c
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crc-itu-t.c
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crc-t10dif.c
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ctype.c
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debug_info.c
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debug_locks.c
locking/lockdep: Fix debug_locks off performance problem
2018-11-13 11:16:48 -08:00
debugobjects.c
debugobjects: avoid recursive calls with kmemleak
2018-12-17 09:38:35 +01:00
dec_and_lock.c
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decompress_bunzip2.c
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decompress_inflate.c
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decompress_unlz4.c
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decompress_unlzma.c
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decompress_unlzo.c
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decompress_unxz.c
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decompress.c
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devres.c
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digsig.c
lib/digsig: fix dereference of NULL user_key_payload
2017-10-27 10:38:08 +02:00
div64.c
lib/div64.c: off by one in shift
2019-04-20 09:07:54 +02:00
dma-debug.c
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dma-noop.c
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dump_stack.c
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dynamic_debug.c
dynamic-debug-howto: fix optional/omitted ending line number to be LARGE instead of 0
2017-12-14 09:28:22 +01:00
dynamic_queue_limits.c
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earlycpio.c
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extable.c
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fault-inject.c
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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
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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
lib/genalloc.c: make the avail variable an atomic_long_t
2017-12-14 09:28:22 +01:00
glob.c
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halfmd4.c
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hexdump.c
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hweight.c
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idr.c
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inflate.c
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int_sqrt.c
lib/int_sqrt: optimize initial value compute
2019-04-05 22:29:04 +02:00
interval_tree_test.c
lib/interval_tree_test.c: allow users to limit scope of endpoint
2018-12-21 14:11:30 +01:00
interval_tree.c
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iomap_copy.c
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iomap.c
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iommu-common.c
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iommu-helper.c
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ioremap.c
ioremap: Update pgtable free interfaces with addr
2018-08-17 20:59:29 +02:00
iov_iter.c
new privimitive: iov_iter_revert()
2017-04-21 09:31:21 +02:00
irq_poll.c
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irq_regs.c
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is_single_threaded.c
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jedec_ddr_data.c
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kasprintf.c
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Kconfig
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Kconfig.debug
kasan: rework Kconfig settings
2018-02-25 11:05:55 +01:00
Kconfig.kasan
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Kconfig.kgdb
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Kconfig.kmemcheck
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Kconfig.ubsan
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kfifo.c
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klist.c
scsi: klist: Make it safe to use klists in atomic context
2018-10-03 17:01:45 -07:00
kobject_uevent.c
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kobject.c
kobject: Replace strncpy with memcpy
2018-12-08 13:05:05 +01:00
kstrtox.c
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kstrtox.h
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lcm.c
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libcrc32c.c
crypto: Work around deallocated stack frame reference gcc bug on sparc.
2017-06-24 07:11:17 +02:00
list_debug.c
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list_sort.c
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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
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lockref.c
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lru_cache.c
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Makefile
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md5.c
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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
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nlattr.c
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nmi_backtrace.c
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nodemask.c
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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
509: fix printing uninitialized stack memory when OID is empty
2018-02-25 11:05:48 +01:00
once.c
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parser.c
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pci_iomap.c
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percpu_counter.c
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percpu_ida.c
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percpu_test.c
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percpu-refcount.c
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plist.c
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pm-notifier-error-inject.c
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radix-tree.c
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random32.c
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ratelimit.c
lib/ratelimit.c: use deferred printk() version
2017-10-12 11:51:19 +02:00
rational.c
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rbtree_test.c
lib/rbtree-test: lower default params
2018-12-21 14:11:30 +01:00
rbtree.c
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reciprocal_div.c
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rhashtable.c
rhashtable: add schedule points
2018-10-18 09:13:24 +02:00
sbitmap.c
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scatterlist.c
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seq_buf.c
seq_buf: Make seq_buf_puts() null-terminate the buffer
2019-02-12 19:44:57 +01:00
sg_pool.c
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sg_split.c
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sha1.c
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show_mem.c
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smp_processor_id.c
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sort.c
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stackdepot.c
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stmp_device.c
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string_helpers.c
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string.c
lib/string.c: implement a basic bcmp
2019-04-17 08:36:39 +02:00
strncpy_from_user.c
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strnlen_user.c
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swiotlb.c
swiotlb: clean up reporting
2018-12-13 09:20:29 +01:00
syscall.c
lib/syscall: Clear return values when no stack
2017-04-08 09:30:35 +02:00
test_bitmap.c
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test_bpf.c
test_bpf: Fix testing with CONFIG_BPF_JIT_ALWAYS_ON=y on other arches
2018-11-10 07:42:54 -08:00
test_firmware.c
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test_hash.c
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test_hexdump.c
test_hexdump: use memcpy instead of strncpy
2018-12-08 13:05:04 +01:00
test_kasan.c
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test_module.c
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test_printf.c
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test_rhashtable.c
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test_static_key_base.c
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test_static_keys.c
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test_user_copy.c
usercopy: Adjust tests to deal with SMAP/PAN
2017-06-14 15:06:05 +02:00
test_uuid.c
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test-kstrtox.c
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test-string_helpers.c
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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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ubsan.c
lib/ubsan.c: don't mark __ubsan_handle_builtin_unreachable as noreturn
2018-11-21 09:26:03 +01:00
ubsan.h
lib/ubsan: add type mismatch handler for new GCC/Clang
2018-02-17 13:21:20 +01:00
ucs2_string.c
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uuid.c
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vsprintf.c
lib/vsprintf: Remove atomic-unsafe support for %pCr
2018-07-03 11:23:06 +02:00
win_minmax.c
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