Matthew Wilcox (Oracle) a16a366927 idr: Fix idr_get_next race with idr_remove ... commit 5c089fd0c7 upstream. If the entry is deleted from the IDR between the call to radix_tree_iter_find() and rcu_dereference_raw(), idr_get_next() will return NULL, which will end the iteration prematurely. We should instead continue to the next entry in the IDR. This only happens if the iteration is protected by the RCU lock. Most IDR users use a spinlock or semaphore to exclude simultaneous modifications. It was noticed once the PID allocator was converted to use the IDR, as it uses the RCU lock, but there may be other users elsewhere in the kernel. We can't use the normal pattern of calling radix_tree_deref_retry() (which catches both a retry entry in a leaf node and a node entry in the root) as the IDR supports storing entries which are unaligned, which will trigger an infinite loop if they are encountered. Instead, we have to explicitly check whether the entry is a retry entry. Fixes: 0a835c4f09 ("Reimplement IDR and IDA using the radix tree") Reported-by: Brendan Gregg <bgregg@netflix.com> Tested-by: Brendan Gregg <bgregg@netflix.com> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-11-24 08:19:11 +01:00
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842
fonts
lz4
lzo
mpi	lib/mpi: Fix karactx leak in mpi_powm	2019-07-10 09:53:42 +02:00
raid6	ARM: 8833/1: Ensure that NEON code always compiles with Clang	2019-04-05 22:33:08 +02:00
reed_solomon	rslib: Fix handling of of caller provided syndrome	2019-07-26 09:14:12 +02:00
xz
zlib_deflate
zlib_inflate
zstd
.gitignore
argv_split.c
ashldi3.c
ashrdi3.c
asn1_decoder.c
assoc_array.c	assoc_array: Fix shortcut creation	2019-03-23 20:09:48 +01:00
atomic64_test.c
atomic64.c
audit.c
bcd.c
bch.c
bitmap.c
bitrev.c
bsearch.c	kprobes: Prohibit probing on bsearch()	2019-04-05 22:33:08 +02:00
btree.c
bucket_locks.c
bug.c
build_OID_registry
bust_spinlocks.c
chacha20.c	crypto: chacha20 - Fix chacha20_block() keystream alignment (again)	2019-11-20 18:47:11 +01:00
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
dec_and_lock.c
decompress_bunzip2.c
decompress_inflate.c
decompress_unlz4.c
decompress_unlzma.c
decompress_unlzo.c
decompress_unxz.c
decompress.c
devres.c
digsig.c
div64.c	lib/div64.c: off by one in shift	2019-04-20 09:16:05 +02:00
dump_stack.c	dump_stack: avoid the livelock of the dump_lock	2019-11-12 19:20:37 +01:00
dynamic_debug.c	jump_label: move 'asm goto' support test to Kconfig	2019-06-04 08:02:34 +02:00
dynamic_queue_limits.c
earlycpio.c
error-inject.c
errseq.c
extable.c
fault-inject.c
fdt_empty_tree.c
fdt_ro.c
fdt_rw.c
fdt_strerror.c
fdt_sw.c
fdt_wip.c
fdt.c
find_bit_benchmark.c
find_bit.c
flex_array.c
flex_proportions.c
gcd.c
gen_crc32table.c
gen_crc64table.c
genalloc.c
glob.c
globtest.c
hexdump.c
hweight.c
idr.c	idr: Fix idr_get_next race with idr_remove	2019-11-24 08:19:11 +01:00
inflate.c
int_sqrt.c	fix int_sqrt64() for very large numbers	2019-01-22 21:40:34 +01:00
interval_tree_test.c
interval_tree.c
iomap_copy.c
iomap.c
iommu-helper.c
ioremap.c
iov_iter.c	iov_iter: optimize page_copy_sane()	2019-05-22 07:37:45 +02:00
irq_poll.c
irq_regs.c
is_single_threaded.c
jedec_ddr_data.c
kasprintf.c
Kconfig
Kconfig.debug	kmemleak: increase DEBUG_KMEMLEAK_EARLY_LOG_SIZE default to 16K	2019-10-07 18:57:17 +02:00
Kconfig.kasan
Kconfig.kgdb
Kconfig.ubsan
kfifo.c
klist.c
kobject_uevent.c	kobject: Don't trigger kobject_uevent(KOBJ_REMOVE) twice.	2019-05-31 06:46:28 -07:00
kobject.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	lib: logic_pio: Add logic_pio_unregister_range()	2019-09-06 10:22:19 +02:00
lru_cache.c
lshrdi3.c
Makefile	x86/mm/mem_encrypt: Disable all instrumentation for early SME setup	2019-05-25 18:23:45 +02:00
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
of-reconfig-notifier-error-inject.c
oid_registry.c
once.c
parman.c
parser.c
pci_iomap.c
percpu_counter.c
percpu_test.c
percpu-refcount.c
plist.c
pm-notifier-error-inject.c
prime_numbers.c
radix-tree.c
random32.c
ratelimit.c
rational.c
rbtree_test.c
rbtree.c
reciprocal_div.c
refcount.c
rhashtable.c	rhashtable: Still do rehash when we get EEXIST	2019-04-03 06:26:17 +02:00
sbitmap.c	sbitmap: fix improper use of smp_mb__before_atomic()	2019-05-31 06:46:00 -07:00
scatterlist.c	lib/scatterlist: Fix mapping iterator when sg->offset is greater than PAGE_SIZE	2019-07-26 09:14:23 +02:00
seq_buf.c	seq_buf: Make seq_buf_puts() null-terminate the buffer	2019-02-12 19:47:16 +01:00
sg_pool.c
sg_split.c
sha1.c
sha256.c
show_mem.c
siphash.c
smp_processor_id.c
sort.c
stackdepot.c
stmp_device.c
string_helpers.c
string.c	lib/string.c: implement a basic bcmp	2019-04-17 08:38:45 +02:00
strncpy_from_user.c	mm/uaccess: Use 'unsigned long' to placate UBSAN warnings on older GCC versions	2019-05-31 06:46:16 -07:00
strnlen_user.c	mm/uaccess: Use 'unsigned long' to placate UBSAN warnings on older GCC versions	2019-05-31 06:46:16 -07:00
syscall.c
test_bitfield.c
test_bitmap.c
test_bpf.c
test_debug_virtual.c
test_firmware.c	test_firmware: fix a memory leak bug	2019-08-16 10:12:49 +02:00
test_hash.c
test_hexdump.c
test_ida.c
test_kasan.c
test_kmod.c	lib/test_kmod.c: potential double free in error handling	2019-03-13 14:02:32 -07:00
test_list_sort.c
test_module.c
test_overflow.c	lib/test_overflow.c: avoid tainting the kernel and fix wrap size	2019-08-06 19:06:51 +02:00
test_parman.c
test_printf.c
test_rhashtable.c	lib/test_rhashtable: Make test_insert_dup() allocate its hash table dynamically	2019-02-12 19:47:21 +01:00
test_siphash.c
test_sort.c
test_static_key_base.c
test_static_keys.c
test_string.c	lib/test_string.c: avoid masking memset16/32/64 failures	2019-08-06 19:06:51 +02:00
test_sysctl.c
test_ubsan.c
test_user_copy.c
test_uuid.c
test-kstrtox.c
test-string_helpers.c
textsearch.c	lib: textsearch: fix escapes in example code	2019-10-29 09:19:35 +01:00
timerqueue.c
ts_bm.c
ts_fsm.c
ts_kmp.c
ubsan.c	ubsan: Fix nasty -Wbuiltin-declaration-mismatch GCC-9 warnings	2019-05-10 17:54:04 +02:00
ubsan.h
ucmpdi2.c
ucs2_string.c
usercopy.c
uuid.c
vsprintf.c
win_minmax.c
xxhash.c