Matthew Wilcox 46437f9a55 radix-tree: fix race in gang lookup ...

If the indirect_ptr bit is set on a slot, that indicates we need to redo
the lookup.  Introduce a new function radix_tree_iter_retry() which
forces the loop to retry the lookup by setting 'slot' to NULL and
turning the iterator back to point at the problematic entry.

This is a pretty rare problem to hit at the moment; the lookup has to
race with a grow of the radix tree from a height of 0.  The consequences
of hitting this race are that gang lookup could return a pointer to a
radix_tree_node instead of a pointer to whatever the user had inserted
in the tree.

Fixes: cebbd29e1c2f ("radix-tree: rewrite gang lookup using iterator")
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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

..

842

crypto: 842 - remove WARN inside printk

2015-12-23 18:20:01 +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

lib/mpi: only require buffers as big as needed for the integer

2015-11-17 22:00:39 +08:00

raid6

powerpc: Create disable_kernel_{fp,altivec,vsx,spe}()

2015-12-01 13:52:25 +11:00

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

…

argv_split.c

…

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

Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-01-11 14:39:17 -08:00

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

…

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

…

btree.c

treewide: Remove old email address

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

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

…

check_signature.c

…

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

…

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

…

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

…

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

…

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

debugobjects: Allow bigger number of early boot objects

2016-01-27 15:40:59 +01:00

dec_and_lock.c

…

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: fix a for loop bounds check

2015-10-05 04:49:54 +01:00

digsig.c

KEYS: Merge the type-specific data with the payload data

2015-10-21 15:18:36 +01:00

div64.c

__div64_32(): make it overridable at compile time

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

dma-debug.c

dma-debug: switch check from _text to _stext

2016-01-14 16:00:49 -08:00

dump_stack.c

asmlinkage: Add explicit __visible to drivers/*, lib/*, kernel/*

2014-05-05 16:07:46 -07:00

dynamic_debug.c

convert a bunch of open-coded instances of memdup_user_nul()

2016-01-04 10:26:58 -05:00

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: fix inverted interval/probability values in printk

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

fdt_empty_tree.c

lib: add fdt_empty_tree.c

2014-04-30 19:49:37 +01:00

fdt_ro.c

…

fdt_rw.c

…

fdt_strerror.c

…

fdt_sw.c

…

fdt_wip.c

…

fdt.c

…

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

…

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

lib/glob.c: add CONFIG_GLOB_SELFTEST

2014-08-06 18:01:25 -07:00

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

Make ARCH_HAS_FAST_MULTIPLIER a real config variable

2014-09-13 11:14:53 -07:00

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

…

int_sqrt.c

…

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/iomap_copy.c: add __ioread32_copy()

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

iomap.c

Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAP

2014-04-07 16:36:11 -07:00

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

…

ioremap.c

x86, mm: support huge KVA mappings on x86

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

iov_iter.c

iov_iter: export import_single_range()

2015-12-06 20:42:19 -05:00

irq_poll.c

irq_poll: Fix irq_poll_sched()

2016-01-19 15:26:55 -05:00

irq_regs.c

…

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

…

kasprintf.c

lib/kasprintf.c: add sanity check to kvasprintf

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

Kconfig

Initial roundup of 4.5 merge window patches

2016-01-23 18:45:06 -08:00

Kconfig.debug

Merge branch 'akpm' (patches from Andrew)

2016-01-21 12:32:08 -08:00

Kconfig.kasan

mm, slub, kasan: enable user tracking by default with KASAN=y

2015-11-05 19:34:48 -08:00

Kconfig.kgdb

kdb: Allow access to sensitive commands to be restricted by default

2014-11-11 09:31:52 -06:00

Kconfig.kmemcheck

…

Kconfig.ubsan

UBSAN: run-time undefined behavior sanity checker

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

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

lib/kobject.c: use kvasprintf_const for formatting ->name

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

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

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

mm, dax, pmem: introduce {get|put}_dev_pagemap() for dax-gup

2016-01-15 17:56:32 -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

…

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: Converted lc_seq_printf_status to return void

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

Makefile

Initial roundup of 4.5 merge window patches

2016-01-23 18:45:06 -08:00

md5.c

lib/md5.c: simplify include

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

memory-notifier-error-inject.c

…

memweight.c

…

net_utils.c

mac_pton: Use bool not int return

2014-06-25 17:45:43 -07:00

netdev-notifier-error-inject.c

net: Add support for CHANGEUPPER notifier error injection

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

nlattr.c

netlink: pad nla_memcpy dest buffer with zeroes

2015-03-31 14:07:24 -04:00

nmi_backtrace.c

ARM: 8439/1: Fix backtrace generation when IPI is masked

2015-10-03 16:40:51 +01:00

notifier-error-inject.c

…

notifier-error-inject.h

…

of-reconfig-notifier-error-inject.c

…

oid_registry.c

…

once.c

once: make helper generic for calling functions once

2015-10-08 05:26:36 -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

mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM

2015-11-06 17:50:42 -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

…

proportions.c

treewide: Remove old email address

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

radix-tree.c

radix-tree: fix race in gang lookup

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

random32.c

random32: add prandom_init_once helper for own rngs

2015-10-08 05:26:38 -07:00

ratelimit.c

ratelimit: fix bug in time interval by resetting right begin time

2016-01-21 17:20:51 -08:00

rational.c

…

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

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

2015-12-31 18:20:10 -05:00

scatterlist.c

scatterlist: allow limited chaining without ARCH_HAS_SG_CHAIN

2015-08-17 08:12:51 -06:00

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_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

string_helpers: fix precision loss for some inputs

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

string.c

lib/string.c: add ULL suffix to the constant definition

2015-11-10 16:32:11 -08:00

strncpy_from_user.c

Use the new batched user accesses in generic user string handling

2015-12-17 10:05:19 -08:00

strnlen_user.c

Use the new batched user accesses in generic user string handling

2015-12-17 10:05:19 -08:00

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

bpf, test: add couple of test cases

2015-12-18 16:04:51 -05:00

test_firmware.c

test: firmware_class: add asynchronous request trigger

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

test_hexdump.c

test_hexdump: print statistics at the end

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

test_kasan.c

lib: test_kasan: add some testcases

2015-11-05 19:34:48 -08:00

test_module.c

test: add minimal module for verification testing

2014-01-23 16:36:57 -08:00

test_printf.c

lib/test_printf.c: test dentry printing

2016-01-16 11:17:29 -08:00

test_rhashtable.c

rhashtable-test: allow to retry even if -ENOMEM was returned

2015-11-23 12:36:08 -05:00

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-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

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

…

ubsan.c

UBSAN: run-time undefined behavior sanity checker

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

ubsan.h

UBSAN: run-time undefined behavior sanity checker

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

ucs2_string.c

…

usercopy.c

…

uuid.c

…

vsprintf.c

lib/vsprintf: factor out %pN[F] handler as netdev_bits()

2016-01-16 11:17:30 -08:00