WSL2-Linux-Kernel/lib
Florian La Roche fbfaf85190 fix int_sqrt64() for very large numbers
If an input number x for int_sqrt64() has the highest bit set, then
fls64(x) is 64.  (1UL << 64) is an overflow and breaks the algorithm.

Subtracting 1 is a better guess for the initial value of m anyway and
that's what also done in int_sqrt() implicitly [*].

[*] Note how int_sqrt() uses __fls() with two underscores, which already
    returns the proper raw bit number.

    In contrast, int_sqrt64() used fls64(), and that returns bit numbers
    illogically starting at 1, because of error handling for the "no
    bits set" case. Will points out that he bug probably is due to a
    copy-and-paste error from the regular int_sqrt() case.

Signed-off-by: Florian La Roche <Florian.LaRoche@googlemail.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-01-21 07:20:18 +13:00
..
842
fonts
lz4
lzo
mpi
raid6 Kbuild late updates for v4.21 2019-01-06 16:33:10 -08:00
reed_solomon
xz
zlib_deflate
zlib_inflate
zstd
.gitignore
Kconfig Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md into for-linus 2019-01-03 08:21:02 -07:00
Kconfig.debug Kconfig updates for v4.21 2018-12-29 13:03:29 -08:00
Kconfig.kasan kasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS 2018-12-28 12:11:43 -08:00
Kconfig.kgdb
Kconfig.ubsan
Makefile Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-12-27 13:53:32 -08:00
argv_split.c
ashldi3.c
ashrdi3.c
asn1_decoder.c
assoc_array.c
atomic64.c
atomic64_test.c
audit.c
bcd.c
bch.c
bitmap.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
bitrev.c
bsearch.c
btree.c
bucket_locks.c
bug.c
build_OID_registry
bust_spinlocks.c
chacha.c
check_signature.c
checksum.c
clz_ctz.c
clz_tab.c
cmdline.c
cmpdi2.c
compat_audit.c
cordic.c
cpu_rmap.c
cpumask.c
crc-ccitt.c
crc-itu-t.c
crc-t10dif.c
crc4.c
crc7.c
crc8.c
crc16.c
crc32.c
crc32defs.h
crc32test.c
crc64.c
ctype.c
debug_info.c
debug_locks.c
debugobjects.c debugobjects: call debug_objects_mem_init eariler 2018-12-28 12:11:45 -08:00
dec_and_lock.c
decompress.c
decompress_bunzip2.c
decompress_inflate.c
decompress_unlz4.c
decompress_unlzma.c
decompress_unlzo.c
decompress_unxz.c
devres.c
digsig.c
div64.c
dump_stack.c
dynamic_debug.c jump_label: move 'asm goto' support test to Kconfig 2019-01-06 09:46:51 +09:00
dynamic_queue_limits.c
earlycpio.c
error-inject.c
errseq.c
extable.c
fault-inject.c
fdt.c
fdt_empty_tree.c
fdt_ro.c
fdt_rw.c
fdt_strerror.c
fdt_sw.c
fdt_wip.c
find_bit.c
find_bit_benchmark.c lib/find_bit_benchmark.c: align test_find_next_and_bit with others 2019-01-04 13:13:46 -08:00
flex_array.c
flex_proportions.c
gcd.c
gen_crc32table.c
gen_crc64table.c lib: don't depend on linux headers being installed. 2018-12-29 11:36:44 -08:00
genalloc.c lib/genalloc.c: include vmalloc.h 2019-01-05 13:54:53 -08:00
glob.c
globtest.c
hexdump.c
hweight.c
idr.c
inflate.c
int_sqrt.c fix int_sqrt64() for very large numbers 2019-01-21 07:20:18 +13:00
interval_tree.c
interval_tree_test.c
iomap.c
iomap_copy.c
iommu-helper.c
ioremap.c lib/ioremap: ensure break-before-make is used for huge p4d mappings 2018-12-28 12:11:50 -08:00
iov_iter.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-01-05 13:18:59 -08:00
irq_poll.c
irq_regs.c
is_single_threaded.c
jedec_ddr_data.c
kasprintf.c
kfifo.c
klist.c
kobject.c
kobject_uevent.c
kstrtox.c
kstrtox.h
lcm.c
libcrc32c.c
list_debug.c
list_sort.c
llist.c
locking-selftest-hardirq.h
locking-selftest-mutex.h
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h
locking-selftest-rsem.h
locking-selftest-rtmutex.h
locking-selftest-softirq.h
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h
locking-selftest-wsem.h
locking-selftest.c
lockref.c
logic_pio.c
lru_cache.c
lshrdi3.c
memcat_p.c
memory-notifier-error-inject.c
memweight.c
muldi3.c
net_utils.c
netdev-notifier-error-inject.c
nlattr.c
nmi_backtrace.c
nodemask.c
notifier-error-inject.c
notifier-error-inject.h
objagg.c
of-reconfig-notifier-error-inject.c
oid_registry.c
once.c
parman.c
parser.c
pci_iomap.c
percpu-refcount.c
percpu_counter.c
percpu_test.c
plist.c
pm-notifier-error-inject.c
prime_numbers.c
radix-tree.c
random32.c
ratelimit.c
rational.c
rbtree.c
rbtree_test.c
reciprocal_div.c
refcount.c
rhashtable.c
sbitmap.c sbitmap: Protect swap_lock from hardirq 2019-01-15 16:29:57 +12:00
scatterlist.c
seq_buf.c
sg_pool.c
sg_split.c
sha1.c
sha256.c
show_mem.c lib/show_mem.c: drop pgdat_resize_lock in show_mem() 2018-12-28 12:11:49 -08:00
siphash.c
smp_processor_id.c
sort.c
stackdepot.c
stmp_device.c
string.c
string_helpers.c
strncpy_from_user.c make 'user_access_begin()' do 'access_ok()' 2019-01-04 12:56:09 -08:00
strnlen_user.c make 'user_access_begin()' do 'access_ok()' 2019-01-04 12:56:09 -08:00
syscall.c
test-kstrtox.c
test-string_helpers.c
test_bitfield.c
test_bitmap.c
test_bpf.c
test_debug_virtual.c
test_firmware.c
test_hash.c
test_hexdump.c
test_ida.c
test_kasan.c
test_kmod.c
test_list_sort.c
test_memcat_p.c
test_module.c
test_objagg.c
test_overflow.c
test_parman.c
test_printf.c
test_rhashtable.c
test_siphash.c
test_sort.c
test_static_key_base.c
test_static_keys.c
test_string.c
test_sysctl.c
test_ubsan.c
test_user_copy.c
test_uuid.c
test_xarray.c
textsearch.c
timerqueue.c
ts_bm.c
ts_fsm.c
ts_kmp.c
ubsan.c
ubsan.h
ucmpdi2.c
ucs2_string.c
usercopy.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
uuid.c
vsprintf.c
win_minmax.c
xarray.c
xxhash.c