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Dmitriy Vyukov 7def0f952e lib: fix data race in rhashtable_rehash_one 
rhashtable_rehash_one() uses complex logic to update entry->next field,
after INIT_RHT_NULLS_HEAD and NULLS_MARKER expansion:

entry->next = 1 | ((base + off) << 1)

This can be compiled along the lines of:

entry->next = base + off
entry->next <<= 1
entry->next |= 1

Which will break concurrent readers.

NULLS value recomputation is not needed here, so just remove
the complex logic.

The data race was found with KernelThreadSanitizer (KTSAN).

Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-22 17:36:07 -07:00
..
842
lib: correct 842 decompress for 32 bit
2015-05-13 10:31:59 +08:00
fonts
fonts: Add 6x10 font
2014-10-09 11:35:48 +03:00
lz4
lz4: fix system halt at boot kernel on x86_64
2015-05-24 11:56:29 -07:00
lzo
lzo: check for length overrun in variable length encoding.
2014-09-28 11:08:01 +02:00
mpi
MPI: Fix mpi_read_buffer
2015-08-25 21:13:16 +08:00
raid6
md/raid6: delta syndrome for ARM NEON
2015-08-31 19:29:05 +02:00
reed_solomon
…
xz
lib/xz: enable all filters by default in Kconfig
2014-06-04 16:54:18 -07:00
zlib_deflate
zlib_deflate/deftree: remove bi_reverse()
2015-09-10 13:29:01 -07:00
zlib_inflate
zlib: clean up some dead code
2014-08-06 18:01:24 -07:00
.gitignore
X.509: Implement simple static OID registry
2012-10-08 13:50:18 +10:30
argv_split.c
argv_split(): teach it to handle mutable strings
2013-04-29 18:28:19 -07:00
asn1_decoder.c
ASN.1: Handle 'ANY OPTIONAL' in grammar
2015-08-05 13:38:07 +01:00
assoc_array.c
assoc_array: Include rcupdate.h for call_rcu() definition
2015-01-07 16:08:41 +00:00
atomic64_test.c
atomic: Add simple atomic_t tests
2015-07-27 14:06:24 +02:00
atomic64.c
atomic: Provide atomic_{or,xor,and}
2015-07-27 14:06:24 +02:00
audit.c
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
bcd.c
usb/core: use bin2bcd() for bcdDevice in RH
2012-09-10 11:13:16 -07:00
bch.c
…
bitmap.c
lib/bitmap.c: bitmap_parselist can accept string with whitespaces on head or tail
2015-09-10 13:29:01 -07:00
bitrev.c
ARM: 8187/1: add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction
2014-12-22 16:43:06 +00:00
bsearch.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
btree.c
lib/btree.c: fix leak of whole btree nodes
2014-06-04 16:54:18 -07:00
bug.c
module: Sanitize RCU usage and locking
2015-05-28 11:31:52 +09:30
build_OID_registry
X.509: do not emit any informational output
2013-06-19 17:54:06 +02:00
bust_spinlocks.c
printk: Provide a wake_up_klogd() off-case
2013-03-22 16:41:20 -07:00
check_signature.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
checksum.c
lib/checksum.c: fix build for generic csum_tcpudp_nofold
2015-01-29 11:57:38 -08:00
clz_ctz.c
lib/clz_ctz.c: add prototype declarations in lib/clz_ctz.c
2014-04-03 16:21:12 -07:00
clz_tab.c
lib: Fix multiple definitions of clz_tab
2012-02-02 10:34:23 +11:00
cmdline.c
lib: Add a generic cmdline parse function parse_option_str
2014-10-03 18:40:58 +01:00
compat_audit.c
audit: Add generic compat syscall support
2014-03-20 10:11:35 -04:00
cordic.c
…
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
cpu: rewrite cpu-notifier-error-inject module
2012-07-30 17:25:22 -07:00
cpumask.c
revert "cpumask: don't perform while loop in cpumask_next_and()"
2015-06-18 17:00:23 -10:00
crc7.c
lib/crc7: Shift crc7() output left 1 bit
2014-05-16 14:26:52 -04:00
crc8.c
…
crc16.c
…
crc32.c
lib: crc32: Add some additional __pure annotations
2014-06-25 16:04:00 -07:00
crc32defs.h
crc32: select an algorithm via Kconfig
2012-03-23 16:58:38 -07:00
crc-ccitt.c
…
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
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
debug_info.c
kbuild: include core debug info when DEBUG_INFO_REDUCED
2015-06-11 15:08:32 +02:00
debug_locks.c
mutex: Add support for wound/wait style locks
2013-06-26 12:10:56 +02:00
debugobjects.c
lib/debugobjects.c: convert printk(KERN_DEBUG to pr_debug
2014-06-04 16:53:53 -07:00
dec_and_lock.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
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
cleanup IORESOURCE_CACHEABLE vs ioremap()
2015-08-10 23:07:06 -04:00
digsig.c
lib/digsig.c: kernel-doc warning fixes
2014-06-04 16:54:19 -07:00
div64.c
lib: correct link to the original source for div64_u64
2015-03-06 23:19:27 +01:00
dma-debug.c
dma-debug: skip debug_dma_assert_idle() when disabled
2015-07-17 16:39:53 -07:00
dump_stack.c
asmlinkage: Add explicit __visible to drivers/*, lib/*, kernel/*
2014-05-05 16:07:46 -07:00
dynamic_debug.c
module: add extra argument for parse_params() callback
2015-05-20 00:25:24 -07:00
dynamic_queue_limits.c
lib/dynamic_queue_limits.c: simplify includes
2015-02-12 18:54:15 -08:00
earlycpio.c
earlycpio.c: Fix the confusing comment of find_cpio_data().
2013-08-14 23:24:01 +02:00
extable.c
…
fault-inject.c
fault-inject: add ratelimit option
2014-12-13 12:42:52 -08:00
fdt_empty_tree.c
lib: add fdt_empty_tree.c
2014-04-30 19:49:37 +01:00
fdt_ro.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt_rw.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt_strerror.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt_sw.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt_wip.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
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
reciprocal_divide: update/correction of the algorithm
2014-01-21 23:17:20 -08:00
flex_proportions.c
proportions: add @gfp to init functions
2014-09-08 09:51:30 +09:00
gcd.c
lib/gcd.c: prevent possible div by 0
2012-10-06 03:04:57 +09:00
gen_crc32table.c
lib: crc32: constify crc32 lookup table
2015-02-13 21:21:35 -08:00
genalloc.c
genalloc: add support of multiple gen_pools per device
2015-09-04 16:54:41 -07:00
glob.c
lib/glob.c: add CONFIG_GLOB_SELFTEST
2014-08-06 18:01:25 -07:00
halfmd4.c
lib/halfmd4.c: simplify includes
2015-02-12 18:54:15 -08:00
hexdump.c
hexdump: fix for non-aligned buffers
2015-07-17 16:39:53 -07:00
hweight.c
Make ARCH_HAS_FAST_MULTIPLIER a real config variable
2014-09-13 11:14:53 -07:00
idr.c
lib/idr.c: remove redundant include
2015-02-12 18:54:15 -08:00
inflate.c
…
int_sqrt.c
lib/int_sqrt.c: optimize square root algorithm
2013-04-29 18:28:19 -07:00
interval_tree_test.c
lib: Export interval_tree
2014-05-05 09:09:14 +02:00
interval_tree.c
lib/interval_tree.c: simplify includes
2015-02-12 18:54:15 -08:00
iomap_copy.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
iomap.c
Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAP
2014-04-07 16:36:11 -07:00
iommu-common.c
lib/iommu-common.c: do not use 0xffffffffffffffffl for computing align_mask
2015-08-07 04:39:41 +03:00
iommu-helper.c
The following text was taken from the original review request:
2012-03-24 10:24:31 -07:00
ioremap.c
x86, mm: support huge KVA mappings on x86
2015-04-14 16:49:04 -07:00
iov_iter.c
Merge branch 'iov_iter' into for-next
2015-04-11 22:26:51 -04:00
irq_regs.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
is_single_threaded.c
…
jedec_ddr_data.c
ddr: add LPDDR2 data from JESD209-2
2012-05-02 00:04:06 -07:00
kasprintf.c
lib/kasprintf.c: use kmalloc_track_caller() to get accurate traces for kvasprintf
2012-10-11 08:50:15 +09:00
Kconfig
libnvdimm for 4.3:
2015-09-08 14:35:59 -07:00
Kconfig.debug
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-09-03 15:46:07 -07:00
Kconfig.kasan
x86/kasan: Move KASAN_SHADOW_OFFSET to the arch Kconfig
2015-07-06 14:53:15 +02:00
Kconfig.kgdb
kdb: Allow access to sensitive commands to be restricted by default
2014-11-11 09:31:52 -06:00
Kconfig.kmemcheck
…
kfifo.c
kfifo: use BUG_ON
2014-08-08 15:57:25 -07:00
klist.c
klist: implement klist_prev()
2015-07-28 08:50:42 +01:00
kobject_uevent.c
lib/kobject_uevent.c: remove redundant include
2015-02-12 18:54:15 -08:00
kobject.c
include, lib: add __printf attributes to several function prototypes
2015-07-17 16:39:53 -07:00
kstrtox.c
kstrto*: accept "-0" for signed conversion
2015-09-10 13:29:01 -07:00
kstrtox.h
…
lcm.c
block: fix blk_stack_limits() regression due to lcm() change
2015-03-31 09:45:50 -06:00
libcrc32c.c
crypto: LLVMLinux: Remove VLAIS usage from libcrc32c.c
2014-10-14 10:51:23 +02:00
list_debug.c
rcu: Fix broken strings in RCU's source code.
2012-07-06 06:01:49 -07:00
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: remove redundant include
2015-02-12 18:54:15 -08:00
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-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
locking/lockdep: Revert qrwlock recusive stuff
2014-10-03 06:09:30 +02:00
lockref.c
locking/lockref: Remove homebrew cmpxchg64_relaxed() macro definition
2015-08-12 11:59:04 +02:00
lru_cache.c
lru_cache: remove use of seq_printf return value
2015-04-15 16:35:25 -07:00
Makefile
Merge branch 'nmi' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
2015-09-08 12:28:10 -07:00
md5.c
lib/md5.c: simplify include
2015-02-12 18:54:15 -08:00
memory-notifier-error-inject.c
memory: memory notifier error injection module
2012-07-30 17:25:22 -07:00
memweight.c
string: introduce memweight()
2012-07-30 17:25:16 -07:00
net_utils.c
mac_pton: Use bool not int return
2014-06-25 17:45:43 -07:00
nlattr.c
netlink: pad nla_memcpy dest buffer with zeroes
2015-03-31 14:07:24 -04:00
nmi_backtrace.c
nmi: create generic NMI backtrace implementation
2015-07-17 12:23:17 +01:00
notifier-error-inject.c
mode_t, whack-a-mole at 11...
2013-04-09 14:13:05 -04:00
notifier-error-inject.h
fault-injection: notifier error injection
2012-07-30 17:25:22 -07:00
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: put EXPORT_SYMBOLs in the conventional place
2014-01-23 16:36:55 -08:00
pci_iomap.c
libnvdimm for 4.3:
2015-09-08 14:35:59 -07:00
percpu_counter.c
percpu_counter: batch size aware __percpu_counter_compare()
2015-05-29 07:39:34 +10:00
percpu_ida.c
lib/percpu_ida.c: remove redundant includes
2015-02-12 18:54:16 -08:00
percpu_test.c
percpu: add test module for various percpu operations
2013-11-13 12:09:11 +09:00
percpu-refcount.c
percpu_ref: make INIT_ATOMIC and switch_to_atomic() sticky
2014-09-24 13:31:50 -04:00
plist.c
lib/plist.c: remove redundant include
2015-02-12 18:54:16 -08:00
pm-notifier-error-inject.c
PM: PM notifier error injection module
2012-07-30 17:25:22 -07:00
proportions.c
proportions: add @gfp to init functions
2014-09-08 09:51:30 +09:00
radix-tree.c
radix-tree: replace preallocated node array with linked list
2015-06-25 17:00:40 -07:00
random32.c
random32: improvements to prandom_bytes
2014-08-24 18:36:01 -07:00
ratelimit.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
rational.c
lib: Change mail address of Oskar Schirmer
2012-05-17 15:18:37 +02:00
rbtree_test.c
rbtree/test: test rbtree_postorder_for_each_entry_safe()
2014-01-23 16:37:03 -08:00
rbtree.c
rbtree: Make lockless searches non-fatal
2015-05-28 11:32:04 +09:30
reciprocal_div.c
reciprocal_divide: update/correction of the algorithm
2014-01-21 23:17:20 -08:00
rhashtable.c
lib: fix data race in rhashtable_rehash_one
2015-09-22 17:36:07 -07:00
scatterlist.c
scatterlist: allow limited chaining without ARCH_HAS_SG_CHAIN
2015-08-17 08:12:51 -06:00
seq_buf.c
seq_buf: Fix seq_buf_bprintf() truncation
2015-03-04 23:40:19 -05:00
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
percpu: add preemption checks to __this_cpu ops
2014-04-07 16:36:14 -07:00
sort.c
lib/sort: Add 64 bit swap function
2015-06-25 17:00:40 -07:00
stmp_device.c
lib/stmp_device.c: replace module.h include
2015-02-12 18:54:16 -08:00
string_helpers.c
lib/string_helpers: rename "esc" arg to "only"
2015-09-10 13:29:01 -07:00
string.c
lib/string.c: introduce strreplace()
2015-06-25 17:00:40 -07:00
strncpy_from_user.c
lib: move strncpy_from_unsafe() into mm/maccess.c
2015-08-31 12:36:10 -07:00
strnlen_user.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2015-06-22 15:52:04 -07:00
swiotlb.c
Merge branch 'for-4.2/sg' of git://git.kernel.dk/linux-block
2015-06-25 15:22:36 -07:00
syscall.c
lib/syscall.c: unexport task_current_syscall()
2014-04-03 16:21:06 -07:00
test_bpf.c
test_bpf: add tests checking that JIT/interpreter sets A and X to 0.
2015-08-06 22:02:32 -07:00
test_firmware.c
test: add firmware_class loader test
2014-07-17 18:44:19 -07:00
test_kasan.c
lib/test_kasan.c: make kmalloc_oob_krealloc_less more correctly
2015-09-10 13:29:01 -07:00
test_module.c
test: add minimal module for verification testing
2014-01-23 16:36:57 -08:00
test_rhashtable.c
rhashtable-test: extend to test concurrency
2015-08-17 14:33:47 -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: Make verify_keys() static
2015-08-05 09:53:40 +02:00
test_user_copy.c
test: check copy_to/from_user boundary validation
2014-01-23 16:36:57 -08:00
test-hexdump.c
hexdump: Make test data really const
2015-06-25 17:00:40 -07:00
test-kstrtox.c
kstrto*: accept "-0" for signed conversion
2015-09-10 13:29:01 -07:00
test-string_helpers.c
lib/string_helpers.c: change semantics of string_escape_mem
2015-04-15 16:35:24 -07:00
textsearch.c
lib/textsearch.c: remove textsearch_put reference from comments
2014-10-14 02:18:14 +02:00
timerqueue.c
timerqueue: Let timerqueue_add/del return information
2015-04-22 17:06:49 +02:00
ts_bm.c
…
ts_fsm.c
…
ts_kmp.c
…
ucs2_string.c
Move utf16 functions to kernel core and rename
2013-04-15 21:23:03 +01:00
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
lib/vsprintf.c: Include clk.h
2015-07-20 10:52:48 -07:00