Liam R. Howlett a8091f039c maple_tree: add MAS_UNDERFLOW and MAS_OVERFLOW states ... When updating the maple tree iterator to avoid rewalks, an issue was introduced when shifting beyond the limits. This can be seen by trying to go to the previous address of 0, which would set the maple node to MAS_NONE and keep the range as the last entry. Subsequent calls to mas_find() would then search upwards from mas->last and skip the value at mas->index/mas->last. This showed up as a bug in mprotect which skips the actual VMA at the current range after attempting to go to the previous VMA from 0. Since MAS_NONE may already be set when searching for a value that isn't contained within a node, changing the handling of MAS_NONE in mas_find() would make the code more complicated and error prone. Furthermore, there was no way to tell which limit was hit, and thus which action to take (next or the entry at the current range). This solution is to add two states to track what happened with the previous iterator action. This allows for the expected behaviour of the next command to return the correct item (either the item at the range requested, or the next/previous). Tests are also added and updated accordingly. Link: https://lkml.kernel.org/r/20230921181236.509072-3-Liam.Howlett@oracle.com Link: https://gist.github.com/heatd/85d2971fae1501b55b6ea401fbbe485b Link: https://lore.kernel.org/linux-mm/20230921181236.509072-1-Liam.Howlett@oracle.com/ Fixes: 39193685d5 ("maple_tree: try harder to keep active node with mas_prev()") Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com> Reported-by: Pedro Falcato <pedro.falcato@gmail.com> Closes: https://gist.github.com/heatd/85d2971fae1501b55b6ea401fbbe485b Closes: https://bugs.archlinux.org/task/79656 Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2023-09-29 17:20:46 -07:00
..
842
crypto	crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui()	2023-08-11 19:19:52 +08:00
dim
fonts
kunit	kunit: Fix possible memory leak in kunit_filter_suites()	2023-09-05 12:30:06 -06:00
livepatch
lz4
lzo
math	lib/math/int_log: Replace LGPL-2.1-or-later boilerplate with SPDX identifier	2023-07-09 22:47:50 +01:00
pldmfw
raid6	raid6: Add LoongArch SIMD recovery implementation	2023-09-06 22:53:55 +08:00
reed_solomon
test_fortify
vdso
xz
zlib_deflate
zlib_dfltcc
zlib_inflate
zstd	add intptr_t	2023-06-09 17:44:13 -07:00
.gitignore
argv_split.c	argv_split: fix kernel-doc warnings	2023-09-19 13:21:33 -07:00
ashldi3.c
ashrdi3.c
asn1_decoder.c
asn1_encoder.c
assoc_array.c
atomic64_test.c
atomic64.c
audit.c
base64.c
bcd.c
bch.c	lib/bch.c: use bitrev instead of internal logic	2023-08-18 10:18:58 -07:00
bitfield_kunit.c
bitmap.c	lib/bitmap: drop optimization of bitmap_{from,to}_arr64	2023-06-22 13:57:41 -07:00
bitrev.c
bootconfig-data.S
bootconfig.c
bsearch.c
btree.c
bucket_locks.c
bug.c
build_OID_registry
buildid.c
bust_spinlocks.c
check_signature.c
checksum_kunit.c	kunit: Fix checksum tests on big endian CPUs	2023-08-25 10:14:34 +01:00
checksum.c
clz_ctz.c	lib/clz_ctz.c: Fix __clzdi2() and __ctzdi2() for 32-bit kernels	2023-08-25 13:22:10 -07:00
clz_tab.c
cmdline_kunit.c
cmdline.c
cmpdi2.c
compat_audit.c
cpu_rmap.c	lib: cpu_rmap: Fix potential use-after-free in irq_cpu_rmap_release()	2023-06-07 21:25:00 -07:00
cpumask_kunit.c
cpumask.c	cpumask: eliminate kernel-doc warnings	2023-07-17 15:47:21 -07:00
crc4.c
crc7.c
crc8.c
crc16.c
crc32.c
crc32defs.h
crc32test.c
crc64-rocksoft.c
crc64.c
crc-ccitt.c
crc-itu-t.c
crc-t10dif.c
ctype.c
debug_info.c
debug_locks.c
debugobjects.c	debugobjects: Recheck debug_objects_enabled before reporting	2023-06-07 14:16:12 +02:00
dec_and_lock.c
decompress_bunzip2.c
decompress_inflate.c	decompressor: provide missing prototypes	2023-06-09 17:44:17 -07:00
decompress_unlz4.c
decompress_unlzma.c
decompress_unlzo.c
decompress_unxz.c	decompressor: provide missing prototypes	2023-06-09 17:44:17 -07:00
decompress_unzstd.c	decompressor: provide missing prototypes	2023-06-09 17:44:17 -07:00
decompress.c
devmem_is_allowed.c	lib: devmem_is_allowed: include linux/io.h	2023-06-09 17:44:15 -07:00
devres.c	devres: show which resource was invalid in __devm_ioremap_resource()	2023-06-23 17:04:04 -07:00
dhry_1.c	lib: dhry: fix sleeping allocations inside non-preemptable section	2023-07-08 09:29:32 -07:00
dhry_2.c
dhry_run.c
dhry.h
digsig.c
dump_stack.c
dynamic_debug.c	dyndbg: add source filename to prefix	2023-08-04 15:28:41 +02:00
dynamic_queue_limits.c
earlycpio.c
errname.c
error-inject.c	lib: error-inject: remove error checking for debugfs_create_dir()	2023-08-18 10:18:55 -07:00
errseq.c
extable.c
fault-inject-usercopy.c
fault-inject.c
fdt_addresses.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_proportions.c
fortify_kunit.c	Revert "fortify: Allow KUnit test to build without FORTIFY"	2023-07-03 12:50:26 -07:00
gen_crc32table.c
gen_crc64table.c
genalloc.c	Devicetree include cleanups for v6.6:	2023-08-30 17:04:28 -07:00
generic-radix-tree.c
glob.c
globtest.c
group_cpus.c
hashtable_test.c
hexdump.c
hweight.c
idr.c	idr: fix param name in idr_alloc_cyclic() doc	2023-09-05 19:01:38 -04:00
inflate.c
interval_tree_test.c
interval_tree.c
iomap_copy.c
iomap.c
iommu-helper.c
iov_iter.c	iov_iter: Fix iov_iter_extract_pages() with zero-sized entries	2023-09-09 15:11:49 -07:00
irq_poll.c
irq_regs.c
is_signed_type_kunit.c
is_single_threaded.c
kasprintf.c
Kconfig	lib/bch.c: use bitrev instead of internal logic	2023-08-18 10:18:58 -07:00
Kconfig.debug	iov_iter: Kunit tests for copying to/from an iterator	2023-09-09 15:11:49 -07:00
Kconfig.kasan
Kconfig.kcsan
Kconfig.kfence
Kconfig.kgdb
Kconfig.kmsan
Kconfig.ubsan	ubsan: Clarify Kconfig text for CONFIG_UBSAN_TRAP	2023-07-17 16:05:19 -07:00
kfifo.c
klist.c
kobject_uevent.c
kobject.c	kobject: Remove redundant checks for whether ktype is NULL	2023-08-19 19:37:53 +02:00
kstrtox.c	kstrtox: consistently use _tolower()	2023-08-21 13:46:25 -07:00
kstrtox.h
kunit_iov_iter.c	iov_iter: Kunit tests for page extraction	2023-09-09 15:11:49 -07:00
libcrc32c.c
linear_ranges.c
list_debug.c	list: Introduce CONFIG_LIST_HARDENED	2023-08-15 14:57:25 -07:00
list_sort.c
list-test.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	lockdep/selftests: Use SBRM APIs for wait context tests	2023-07-26 12:29:13 +02:00
lockref.c
logic_iomem.c
logic_pio.c	minmax: add in_range() macro	2023-08-24 16:20:18 -07:00
lru_cache.c
lshrdi3.c
Makefile	iov_iter: Kunit tests for copying to/from an iterator	2023-09-09 15:11:49 -07:00
maple_tree.c	maple_tree: add MAS_UNDERFLOW and MAS_OVERFLOW states	2023-09-29 17:20:46 -07:00
memcat_p.c
memcpy_kunit.c	kunit: memcpy: Mark tests as slow using test attributes	2023-07-26 13:29:28 -06:00
memory-notifier-error-inject.c
memregion.c
memweight.c
muldi3.c
net_utils.c	mac_pton: Clean up the header inclusions	2023-06-06 13:18:32 +02:00
netdev-notifier-error-inject.c
nlattr.c	netlink: allow be16 and be32 types in all uint policy checks	2023-07-27 13:45:51 +02:00
nmi_backtrace.c	nmi_backtrace: allow excluding an arbitrary CPU	2023-08-18 10:19:00 -07:00
notifier-error-inject.c	lib: remove error checking for debugfs_create_dir()	2023-08-18 10:18:55 -07:00
notifier-error-inject.h
objagg.c
of-reconfig-notifier-error-inject.c
oid_registry.c
once.c
overflow_kunit.c	overflow: Add struct_size_t() helper	2023-05-26 13:52:19 -07:00
packing.c
parman.c
parser.c
pci_iomap.c
percpu_counter.c	pcpcntr: add group allocation/free	2023-08-25 08:06:53 -07:00
percpu_test.c
percpu-refcount.c
plist.c
pm-notifier-error-inject.c
polynomial.c
radix-tree.c	radix tree: remove unused variable	2023-08-21 13:07:22 -07:00
radix-tree.h	radix-tree: move declarations to header	2023-06-12 11:31:50 -07:00
random32.c
ratelimit.c
rbtree_test.c
rbtree.c
rcuref.c
ref_tracker.c	lib/ref_tracker: remove warnings in case of allocation failure	2023-06-05 15:28:42 -07:00
refcount.c
rhashtable.c
sbitmap.c	sbitmap: fix batching wakeup	2023-07-21 11:40:20 -06:00
scatterlist.c	scatterlist: add missing function params to kernel-doc	2023-09-19 13:21:33 -07:00
seq_buf.c
sg_pool.c
sg_split.c
siphash_kunit.c
siphash.c
slub_kunit.c
smp_processor_id.c
sort.c
stackdepot.c
stackinit_kunit.c
stmp_device.c
strcat_kunit.c	string: Add Kunit tests for strcat() family	2023-05-16 14:08:02 -07:00
string_helpers.c	lib/string_helpers: Add kstrdup_and_replace() helper	2023-08-04 18:21:50 -07:00
string.c	string: use __builtin_memcpy() in strlcpy/strlcat	2023-06-01 11:24:50 -07:00
strncpy_from_user.c
strnlen_user.c
strscpy_kunit.c
syscall.c
test_bitmap.c	lib/bitmap: workaround const_eval test build failure	2023-07-18 13:25:37 -07:00
test_bitops.c
test_bits.c
test_blackhole_dev.c
test_bpf.c	bpf/tests: Enhance output on error and fix typos	2023-08-18 17:08:42 +02:00
test_debug_virtual.c
test_dynamic_debug.c
test_firmware.c	test_firmware: return ENOMEM instead of ENOSPC on failed memory allocation	2023-06-15 13:42:18 +02:00
test_fprobe.c	fprobe: Pass return address to the handlers	2023-06-06 21:39:55 +09:00
test_fpu.c
test_free_pages.c
test_hash.c
test_hexdump.c
test_hmm_uapi.h
test_hmm.c	lib: replace kmap() with kmap_local_page()	2023-08-18 10:18:50 -07:00
test_ida.c
test_kmod.c
test_kprobes.c
test_linear_ranges.c
test_list_sort.c
test_lockup.c
test_maple_tree.c	maple_tree: add MAS_UNDERFLOW and MAS_OVERFLOW states	2023-09-29 17:20:46 -07:00
test_memcat_p.c
test_meminit.c	lib/test_meminit: allocate pages up to order MAX_ORDER	2023-08-18 10:12:32 -07:00
test_min_heap.c
test_module.c
test_objagg.c
test_parman.c
test_printf.c	lib/vsprintf: declare no_hash_pointers in sprintf.h	2023-08-21 13:46:24 -07:00
test_ref_tracker.c	lib/ref_tracker: improve printing stats	2023-06-05 15:28:42 -07:00
test_rhashtable.c
test_scanf.c	lib: test_scanf: Add explicit type cast to result initialization in test_number_prefix()	2023-08-16 11:47:29 +02:00
test_sort.c
test_static_key_base.c
test_static_keys.c
test_string.c
test_sysctl.c	test_sysclt: Test for registering a mount point	2023-06-18 02:32:54 -07:00
test_ubsan.c
test_user_copy.c
test_uuid.c
test_vmalloc.c	lib/test_vmalloc.c: avoid garbage in page array	2023-06-12 11:31:51 -07:00
test_xarray.c
test-kstrtox.c
test-string_helpers.c
textsearch.c
timerqueue.c
trace_readwrite.c
ts_bm.c	lib/ts_bm: add helper to reduce indentation and improve readability	2023-07-27 13:45:51 +02:00
ts_fsm.c
ts_kmp.c
ubsan.c	ubsan: add prototypes for internal functions	2023-05-30 16:42:01 -07:00
ubsan.h	ubsan: add prototypes for internal functions	2023-05-30 16:42:01 -07:00
ucmpdi2.c
ucs2_string.c
usercopy.c
uuid.c
vsprintf.c	lib/vsprintf: split out sprintf() and friends	2023-08-21 13:46:24 -07:00
win_minmax.c
xarray.c	xarray: Document necessary flag in alloc functions	2023-09-05 19:01:38 -04:00
xxhash.c