linux-next/lib
Lorenzo Stoakes bea07fd631 maple_tree: correct tree corruption on spanning store
Patch series "maple_tree: correct tree corruption on spanning store", v3.

There has been a nasty yet subtle maple tree corruption bug that appears
to have been in existence since the inception of the algorithm.

This bug seems far more likely to happen since commit f8d112a4e6
("mm/mmap: avoid zeroing vma tree in mmap_region()"), which is the point
at which reports started to be submitted concerning this bug.

We were made definitely aware of the bug thanks to the kind efforts of
Bert Karwatzki who helped enormously in my being able to track this down
and identify the cause of it.

The bug arises when an attempt is made to perform a spanning store across
two leaf nodes, where the right leaf node is the rightmost child of the
shared parent, AND the store completely consumes the right-mode node.

This results in mas_wr_spanning_store() mitakenly duplicating the new and
existing entries at the maximum pivot within the range, and thus maple
tree corruption.

The fix patch corrects this by detecting this scenario and disallowing the
mistaken duplicate copy.

The fix patch commit message goes into great detail as to how this occurs.

This series also includes a test which reliably reproduces the issue, and
asserts that the fix works correctly.

Bert has kindly tested the fix and confirmed it resolved his issues.  Also
Mikhail Gavrilov kindly reported what appears to be precisely the same
bug, which this fix should also resolve.


This patch (of 2):

There has been a subtle bug present in the maple tree implementation from
its inception.

This arises from how stores are performed - when a store occurs, it will
overwrite overlapping ranges and adjust the tree as necessary to
accommodate this.

A range may always ultimately span two leaf nodes.  In this instance we
walk the two leaf nodes, determine which elements are not overwritten to
the left and to the right of the start and end of the ranges respectively
and then rebalance the tree to contain these entries and the newly
inserted one.

This kind of store is dubbed a 'spanning store' and is implemented by
mas_wr_spanning_store().

In order to reach this stage, mas_store_gfp() invokes
mas_wr_preallocate(), mas_wr_store_type() and mas_wr_walk() in turn to
walk the tree and update the object (mas) to traverse to the location
where the write should be performed, determining its store type.

When a spanning store is required, this function returns false stopping at
the parent node which contains the target range, and mas_wr_store_type()
marks the mas->store_type as wr_spanning_store to denote this fact.

When we go to perform the store in mas_wr_spanning_store(), we first
determine the elements AFTER the END of the range we wish to store (that
is, to the right of the entry to be inserted) - we do this by walking to
the NEXT pivot in the tree (i.e.  r_mas.last + 1), starting at the node we
have just determined contains the range over which we intend to write.

We then turn our attention to the entries to the left of the entry we are
inserting, whose state is represented by l_mas, and copy these into a 'big
node', which is a special node which contains enough slots to contain two
leaf node's worth of data.

We then copy the entry we wish to store immediately after this - the copy
and the insertion of the new entry is performed by mas_store_b_node().

After this we copy the elements to the right of the end of the range which
we are inserting, if we have not exceeded the length of the node (i.e. 
r_mas.offset <= r_mas.end).

Herein lies the bug - under very specific circumstances, this logic can
break and corrupt the maple tree.

Consider the following tree:

Height
  0                             Root Node
                                 /      \
                 pivot = 0xffff /        \ pivot = ULONG_MAX
                               /          \
  1                       A [-----]       ...
                             /   \
             pivot = 0x4fff /     \ pivot = 0xffff
                           /       \
  2 (LEAVES)          B [-----]  [-----] C
                                      ^--- Last pivot 0xffff.

Now imagine we wish to store an entry in the range [0x4000, 0xffff] (note
that all ranges expressed in maple tree code are inclusive):

1. mas_store_gfp() descends the tree, finds node A at <=0xffff, then
   determines that this is a spanning store across nodes B and C. The mas
   state is set such that the current node from which we traverse further
   is node A.

2. In mas_wr_spanning_store() we try to find elements to the right of pivot
   0xffff by searching for an index of 0x10000:

    - mas_wr_walk_index() invokes mas_wr_walk_descend() and
      mas_wr_node_walk() in turn.

        - mas_wr_node_walk() loops over entries in node A until EITHER it
          finds an entry whose pivot equals or exceeds 0x10000 OR it
          reaches the final entry.

        - Since no entry has a pivot equal to or exceeding 0x10000, pivot
          0xffff is selected, leading to node C.

    - mas_wr_walk_traverse() resets the mas state to traverse node C. We
      loop around and invoke mas_wr_walk_descend() and mas_wr_node_walk()
      in turn once again.

         - Again, we reach the last entry in node C, which has a pivot of
           0xffff.

3. We then copy the elements to the left of 0x4000 in node B to the big
   node via mas_store_b_node(), and insert the new [0x4000, 0xffff] entry
   too.

4. We determine whether we have any entries to copy from the right of the
   end of the range via - and with r_mas set up at the entry at pivot
   0xffff, r_mas.offset <= r_mas.end, and then we DUPLICATE the entry at
   pivot 0xffff.

5. BUG! The maple tree is corrupted with a duplicate entry.

This requires a very specific set of circumstances - we must be spanning
the last element in a leaf node, which is the last element in the parent
node.

spanning store across two leaf nodes with a range that ends at that shared
pivot.

A potential solution to this problem would simply be to reset the walk
each time we traverse r_mas, however given the rarity of this situation it
seems that would be rather inefficient.

Instead, this patch detects if the right hand node is populated, i.e.  has
anything we need to copy.

We do so by only copying elements from the right of the entry being
inserted when the maximum value present exceeds the last, rather than
basing this on offset position.

The patch also updates some comments and eliminates the unused bool return
value in mas_wr_walk_index().

The work performed in commit f8d112a4e6 ("mm/mmap: avoid zeroing vma
tree in mmap_region()") seems to have made the probability of this event
much more likely, which is the point at which reports started to be
submitted concerning this bug.

The motivation for this change arose from Bert Karwatzki's report of
encountering mm instability after the release of kernel v6.12-rc1 which,
after the use of CONFIG_DEBUG_VM_MAPLE_TREE and similar configuration
options, was identified as maple tree corruption.

After Bert very generously provided his time and ability to reproduce this
event consistently, I was able to finally identify that the issue
discussed in this commit message was occurring for him.

Link: https://lkml.kernel.org/r/cover.1728314402.git.lorenzo.stoakes@oracle.com
Link: https://lkml.kernel.org/r/48b349a2a0f7c76e18772712d0997a5e12ab0a3b.1728314403.git.lorenzo.stoakes@oracle.com
Fixes: 54a611b605 ("Maple Tree: add new data structure")
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reported-by: Bert Karwatzki <spasswolf@web.de>
Closes: https://lore.kernel.org/all/20241001023402.3374-1-spasswolf@web.de/
Tested-by: Bert Karwatzki <spasswolf@web.de>
Reported-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Closes: https://lore.kernel.org/all/CABXGCsOPwuoNOqSMmAvWO2Fz4TEmPnjFj-b7iF+XFRu1h7-+Dg@mail.gmail.com/
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Tested-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-10-17 08:35:10 -07:00
..
842 move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
crypto move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
dim dimlib: use *-y instead of *-objs in Makefile 2024-09-01 20:43:40 -07:00
fonts lib/fonts: Fix visiblity of SUN12x22 and TER16x32 if DRM_PANIC 2024-06-24 13:18:02 +02:00
kunit The core clk framework is left largely untouched this time around except for 2024-09-23 15:01:48 -07:00
lz4 move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
lzo move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
math Many singleton patches - please see the various changelogs for details. 2024-09-21 08:20:50 -07:00
pldmfw move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
raid6 lib/raid6: use CC_FLAGS_FPU for NEON CFLAGS 2024-05-19 14:36:18 -07:00
reed_solomon treewide: use get_random_u32_below() instead of deprecated function 2022-11-18 02:15:15 +01:00
test_fortify fortify: use if_changed_dep to record header dependency in *.cmd files 2024-08-15 09:26:02 -07:00
vdso random: vDSO: minimize and simplify header includes 2024-09-13 17:28:35 +02:00
xz move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
zlib_deflate lib/zlib: add missing MODULE_DESCRIPTION() macro 2024-07-04 23:43:11 -07:00
zlib_dfltcc lib/zlib: unpoison DFLTCC output buffers 2024-07-03 19:30:23 -07:00
zlib_inflate lib/zlib: Split deflate and inflate states for DFLTCC 2023-02-02 22:50:09 -08:00
zstd move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
.gitignore fortify: refactor test_fortify Makefile to fix some build problems 2024-08-15 09:26:02 -07:00
alloc_tag.c sysctl changes for 6.11-rc1 2024-07-16 14:24:29 -07:00
argv_split.c argv_split: fix kernel-doc warnings 2023-09-19 13:21:33 -07:00
ashldi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
ashrdi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
asn1_decoder.c Revert "lib: Revert use of fallthrough pseudo-keyword in lib/" 2020-11-18 14:15:17 -06:00
asn1_encoder.c lib/asn1_encoder: add missing MODULE_DESCRIPTION() macro 2024-06-24 22:25:06 -07:00
assoc_array.c assoc_array: fix the return value in assoc_array_insert_mid_shortcut() 2024-03-12 13:09:23 -07:00
atomic64_test.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/*_test.ko 2024-06-24 22:25:06 -07:00
atomic64.c locking/atomic: atomic64: Remove unusable atomic ops 2021-12-13 10:56:09 +01:00
audit.c audit: add support for the openat2 syscall 2021-10-01 16:52:48 -04:00
base64.c lib/base64: RFC4648-compliant base64 encoding 2022-08-02 17:14:47 -06:00
bcd.c lib/bcd: optimize _bin2bcd() for improved performance 2024-09-01 20:43:33 -07:00
bch.c lib/bch.c: use swap() to improve code 2024-07-12 16:39:53 -07:00
bitfield_kunit.c kunit: add missing MODULE_DESCRIPTION() macros to lib/*.c 2024-06-24 22:25:06 -07:00
bitmap-str.c lib/bitmap: split-out string-related operations to a separate files 2023-10-14 20:25:22 -07:00
bitmap.c cpumask: add cpumask_weight_andnot() 2024-02-01 13:06:40 +01:00
bitrev.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
bootconfig-data.S bootconfig: Support embedding a bootconfig file in kernel 2022-04-26 17:58:51 -04:00
bootconfig.c bootconfig: Remove duplicate included header file linux/bootconfig.h 2024-07-12 08:55:02 +09:00
bsearch.c lib/bsearch: Provide __always_inline variant 2020-06-11 15:14:53 +02:00
btree.c minmax: make generic MIN() and MAX() macros available everywhere 2024-07-28 15:49:18 -07:00
bucket_locks.c ila: make lockdep happy again 2018-08-16 12:14:42 -07:00
bug.c cpuidle: lib/bug: Disable rcu_is_watching() during WARN/BUG 2023-01-31 15:01:45 +01:00
build_OID_registry lib/build_OID_registry: avoid non-destructive substitution for Perl < 5.13.2 compat 2024-07-06 11:39:51 -07:00
buildid.c lib/buildid: don't limit .note.gnu.build-id to the first page in ELF 2024-09-11 09:58:31 -07:00
bust_spinlocks.c kernel/panic: Drop unblank_screen call 2022-09-01 16:55:35 +02:00
check_signature.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
checksum_kunit.c lib: checksum: use ARRAY_SIZE() to improve assert_setup_correct() 2024-09-01 20:43:30 -07:00
checksum.c unify generic instances of csum_partial_copy_nocheck() 2020-08-20 15:45:14 -04:00
closure.c closures: use seq_putc() in debug_show() 2024-09-01 20:43:29 -07:00
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 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cmdline_kunit.c kunit: add missing MODULE_DESCRIPTION() macros to lib/*.c 2024-06-24 22:25:06 -07:00
cmdline.c lib/cmdline: avoid page fault in next_arg 2022-09-11 21:55:06 -07:00
cmpdi2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
cmpxchg-emu.c lib: Add one-byte emulation function 2024-04-09 22:06:00 -07:00
codetag.c lib: alloc_tag_module_unload must wait for pending kfree_rcu calls 2024-10-17 00:28:07 -07:00
compat_audit.c audit: add support for the openat2 syscall 2021-10-01 16:52:48 -04:00
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 lib: bitmap: add missing MODULE_DESCRIPTION() macros 2024-06-18 10:40:52 -07:00
cpumask.c bitmap patches for v6.7 2023-11-03 07:08:36 -10:00
crc4.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
crc7.c lib/crc7: fix a kernel-doc markup 2021-01-21 14:06:00 -07:00
crc8.c lib: crc8: pointer to data block should be const 2021-05-06 19:24:12 -07:00
crc16.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
crc32.c lib/crc32: Make crc32_be weak for arch override 2022-01-31 11:21:43 +11:00
crc32defs.h lib/crc: Move polynomial definition to separate header 2018-07-27 19:04:33 +08:00
crc32test.c lib/crc32test: correct printed bytes count 2022-01-31 11:21:43 +11:00
crc64-rocksoft.c crypto: add rocksoft 64b crc guard tag framework 2022-03-07 12:48:35 -07:00
crc64.c lib: add rocksoft model crc64 2022-03-07 12:48:35 -07:00
crc-ccitt.c lib: crc_ccitt_false() is identical to crc_itu_t() 2023-12-29 12:22:26 -08:00
crc-itu-t.c crc-itu-t: fix typo in CRC ITU-T polynomial comment 2022-06-07 10:27:38 +02:00
crc-t10dif.c crc-t10dif: clean up some more things 2020-06-18 17:26:43 +10:00
ctype.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
debug_info.c isystem: ship and use stdarg.h 2021-08-19 09:02:55 +09:00
debug_locks.c locking/lockdep: Improve noinstr vs errors 2021-06-22 13:56:43 +02:00
debugobjects.c debugobjects: Remove redundant checks in fill_pool() 2024-09-09 16:40:26 +02:00
dec_and_lock.c perf: Fix perf_event_pmu_context serialization 2023-01-31 20:37:18 +01:00
decompress_bunzip2.c decompress_bunzip2: fix rare decompression failure 2024-07-26 14:33:09 -07:00
decompress_inflate.c decompressor: provide missing prototypes 2023-06-09 17:44:17 -07:00
decompress_unlz4.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
decompress_unlzma.c minmax: make generic MIN() and MAX() macros available everywhere 2024-07-28 15:49:18 -07:00
decompress_unlzo.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
decompress_unxz.c xz: remove XZ_EXTERN and extern from functions 2024-09-01 20:43:27 -07:00
decompress_unzstd.c decompressor: provide missing prototypes 2023-06-09 17:44:17 -07:00
decompress.c lib: Add zstd support to decompress 2020-07-31 11:49:08 +02:00
devmem_is_allowed.c lib: devmem_is_allowed: include linux/io.h 2023-06-09 17:44:15 -07:00
devres.c devres: don't use "proxy" headers 2024-04-25 21:07:06 -07:00
dhry_1.c lib: dhry: use ktime_ms_delta() helper 2024-02-22 15:38:52 -08:00
dhry_2.c lib: add Dhrystone benchmark test 2023-02-02 22:50:01 -08:00
dhry_run.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
dhry.h lib: add Dhrystone benchmark test 2023-02-02 22:50:01 -08:00
digsig.c crypto: sha - split sha.h into sha1.h and sha2.h 2020-11-20 14:45:33 +11:00
dump_stack.c Linux 6.11-rc1 2024-07-30 09:30:11 -10:00
dynamic_debug.c dyndbg: use seq_putc() in ddebug_proc_show() 2024-09-01 20:43:29 -07:00
dynamic_queue_limits.c net: dqs: make struct dql more cache efficient 2024-04-15 11:19:53 -07:00
earlycpio.c lib: move from strlcpy with unused retval to strscpy 2022-09-11 21:55:10 -07:00
errname.c parisc: Drop the HP-UX ENOSYM and EREMOTERELEASE error codes 2023-11-25 09:43:18 +01:00
error-inject.c lib: error-inject: remove error checking for debugfs_create_dir() 2023-08-18 10:18:55 -07:00
errseq.c kernel.h: split out mathematical helpers 2020-12-15 22:46:15 -08:00
extable.c sparc32: switch to generic extables 2021-01-03 20:05:18 -05:00
fault-inject-usercopy.c lib, include/linux: add usercopy failure capability 2020-10-16 11:11:22 -07:00
fault-inject.c fault-inject: improve build for CONFIG_FAULT_INJECTION=n 2024-09-01 20:43:33 -07:00
fdt_addresses.c libfdt: include fdt_addresses.c 2020-01-08 16:59:19 +00:00
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 lib: bitmap: add missing MODULE_DESCRIPTION() macros 2024-06-18 10:40:52 -07:00
find_bit.c bitmap patches for 6.10 2024-05-21 15:29:01 -07:00
flex_proportions.c flex_proportions: remove unused fprop_local_single 2024-02-22 15:38:52 -08:00
fortify_kunit.c mm: kvmalloc: align kvrealloc() with krealloc() 2024-09-01 20:25:44 -07:00
fw_table.c lib/firmware_table: Provide buffer length argument to cdat_table_parse() 2024-03-13 00:03:21 -07:00
gen_crc32table.c lib/crc: Use consistent naming for CRC-32 polynomials 2018-07-27 19:04:33 +08:00
gen_crc64table.c lib: add rocksoft model crc64 2022-03-07 12:48:35 -07:00
genalloc.c Devicetree include cleanups for v6.6: 2023-08-30 17:04:28 -07:00
generic-radix-tree.c lib/generic-radix-tree.c: add preallocation 2024-09-09 09:41:47 -04:00
glob.c lib: glob.c: added null check for character class 2024-09-09 16:47:41 -07:00
globtest.c lib: add module support to glob tests 2017-02-24 17:46:57 -08:00
group_cpus.c lib/group_cpus.c: avoid acquiring cpu hotplug lock in group_cpus_evenly 2023-12-06 16:12:46 -08:00
hashtable_test.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/*_test.ko 2024-06-24 22:25:06 -07:00
hexdump.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
hweight.c x86/kconfig: Disable CONFIG_GENERIC_HWEIGHT and remove __HAVE_ARCH_SW_HWEIGHT 2019-05-13 11:07:33 +02:00
idr.c ida: Fix crash in ida_free when the bitmap is empty 2023-12-21 10:02:28 -08:00
inflate.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
interval_tree_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
interval_tree.c interval-tree: Add a utility to iterate over spans in an interval tree 2022-11-29 16:34:15 -04:00
iomap_copy.c s390: Stop using weak symbols for __iowrite64_copy() 2024-04-22 17:11:20 -03:00
iomap.c kmsan: add iomap support 2022-10-03 14:03:21 -07:00
iommu-helper.c iommu-helper: mark iommu_is_span_boundary as inline 2018-05-09 06:55:44 +02:00
iov_iter.c iov_iter: fix advancing slot in iter_folioq_get_pages() 2024-10-01 11:49:57 +02:00
irq_poll.c softirq: Remove unused 'action' parameter from action callback 2024-08-20 17:13:40 +02:00
irq_regs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
is_signed_type_kunit.c kunit: add missing MODULE_DESCRIPTION() macros to lib/*.c 2024-06-24 22:25:06 -07:00
is_single_threaded.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
kasprintf.c isystem: ship and use stdarg.h 2021-08-19 09:02:55 +09:00
Kconfig dim: make DIMLIB dependent on NET 2024-06-25 17:15:06 -07:00
Kconfig.debug Kbuild updates for v6.12 2024-09-24 13:02:06 -07:00
Kconfig.kasan treewide: update LLVM Bugzilla links 2024-02-22 15:38:51 -08:00
Kconfig.kcsan Kernel concurrency sanitizer (KCSAN) updates for v6.3 2023-02-25 13:02:20 -08:00
Kconfig.kfence mm/slab: remove CONFIG_SLAB from all Kconfig and Makefile 2023-12-05 11:14:40 +01:00
Kconfig.kgdb kgdb: add HAS_IOPORT dependency 2024-04-25 21:07:05 -07:00
Kconfig.kmsan mm/slab: remove CONFIG_SLAB from all Kconfig and Makefile 2023-12-05 11:14:40 +01:00
Kconfig.ubsan x86/traps: Enable UBSAN traps on x86 2024-08-06 13:42:40 +02:00
kfifo.c TTY/Serial changes for 6.10-rc1 2024-05-22 11:53:02 -07:00
klist.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 248 2019-06-19 17:09:08 +02:00
kobject_uevent.c kobject_uevent: Fix OOB access within zap_modalias_env() 2024-06-12 13:24:05 +02:00
kobject.c Revert "kobject: Remove redundant checks for whether ktype is NULL" 2024-02-08 16:39:25 +00:00
kstrtox.c kstrtox: consistently use _tolower() 2023-08-21 13:46:25 -07:00
kstrtox.h lib: vsprintf: Fix handling of number field widths in vsscanf 2021-05-19 15:05:11 +02:00
kunit_iov_iter.c mm: Define struct folio_queue and ITER_FOLIOQ to handle a sequence of folios 2024-09-12 12:20:21 +02:00
libcrc32c.c libcrc32c: remove crc32c_impl 2023-04-17 18:01:23 +02:00
linear_ranges.c lib: add linear range get selector within 2021-08-13 18:37:38 +02:00
list_debug.c list: Introduce CONFIG_LIST_HARDENED 2023-08-15 14:57:25 -07:00
list_sort.c lib: fix spelling mistakes 2021-07-08 11:48:20 -07:00
list-test.c Revert "list: test: fix tests for list_cut_position()" 2024-09-26 14:01:44 -07:00
llist.c llist: add llist_del_first_this() 2023-10-16 12:44:06 -04:00
locking-selftest-hardirq.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-mutex.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-rsem.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-rtmutex.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-softirq.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest-wsem.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
locking-selftest.c lockdep/selftests: Use SBRM APIs for wait context tests 2023-07-26 12:29:13 +02:00
lockref.c lockref: stop doing cpu_relax in the cmpxchg loop 2023-01-13 14:35:38 -06:00
logic_iomem.c lib/logic_iomem: correct fallback config references 2022-03-11 10:42:56 +01:00
logic_pio.c minmax: add in_range() macro 2023-08-24 16:20:18 -07:00
lru_cache.c lib/lru_cache: fix spelling mistake "colision"->"collision" 2024-09-01 20:43:29 -07:00
lshrdi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
lwq.c lib: add light-weight queuing mechanism. 2023-10-16 12:44:06 -04:00
Makefile Many singleton patches - please see the various changelogs for details. 2024-09-21 08:20:50 -07:00
maple_tree.c maple_tree: correct tree corruption on spanning store 2024-10-17 08:35:10 -07:00
memcat_p.c lib: Fix ia64 bootloader linkage 2018-10-16 13:45:44 +02:00
memcpy_kunit.c kunit/fortify: add missing MODULE_DESCRIPTION() macros 2024-06-24 22:25:05 -07:00
memory-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
memregion.c lib/memregion.c: include memregion.h 2020-09-26 10:33:57 -07:00
memweight.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
muldi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
net_utils.c mac_pton: Clean up the header inclusions 2023-06-06 13:18:32 +02:00
netdev-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
nlattr.c netlink: add nla be16/32 types to minlen array 2024-02-22 19:01:55 -08:00
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 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
objagg.c mlxsw: spectrum_acl_erp: Fix object nesting warning 2024-06-10 11:14:52 +01:00
objpool.c objpool: cache nr_possible_cpus() and avoid caching nr_cpu_ids 2024-05-01 23:18:48 +09:00
of-reconfig-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
oid_registry.c lib/oid_registry.c: remove redundant assignment to variable num 2022-11-18 13:55:06 -08:00
once.c once: rename _SLOW to _SLEEPABLE 2022-10-03 17:34:32 -07:00
overflow_kunit.c kunit/overflow: Fix UB in overflow_allocation_test 2024-08-15 09:24:55 -07:00
packing.c lib: packing: remove MODULE_LICENSE in non-modules 2023-03-09 23:08:04 -08:00
parman.c lib: remove "expecting prototype" kernel-doc warnings 2021-04-16 16:10:37 -07:00
parser.c lib: parser: update documentation for match_NUMBER functions 2023-03-02 21:54:22 -08:00
percpu_counter.c lib/percpu_counter: add missing __percpu qualifier to a cast 2024-09-01 20:43:34 -07:00
percpu_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
percpu-refcount.c percpu-refcount: Use call_rcu_hurry() for atomic switch 2022-11-30 13:16:40 -08:00
plist.c lib/plist.c: avoid worst case scenario in plist_add 2024-06-24 22:25:10 -07:00
pm-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
polynomial.c lib: add generic polynomial calculation 2022-05-22 11:32:30 -07:00
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 move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
ratelimit.c ratelimit: Fix data-races in ___ratelimit(). 2022-08-24 13:46:57 +01:00
rbtree_test.c augmented rbtree: add new RB_DECLARE_CALLBACKS_MAX macro 2019-09-25 17:51:39 -07:00
rbtree.c lib/rbtree.c: fix the example typo 2024-07-04 23:43:10 -07:00
rcuref.c locking/atomics: Use atomic_try_cmpxchg_release() to micro-optimize rcuref_put_slowpath() 2023-10-10 10:14:27 +02:00
ref_tracker.c lib/ref_tracker: remove warnings in case of allocation failure 2023-06-05 15:28:42 -07:00
refcount.c lib: fix spelling mistakes 2021-07-08 11:48:20 -07:00
rhashtable.c lib/rhashtable: cleanup fallback check in bucket_table_alloc() 2024-09-01 20:43:32 -07:00
sbitmap.c lib/sbitmap: define swap_lock as raw_spinlock_t 2024-09-20 00:20:06 -06:00
scatterlist.c mm: Define struct folio_queue and ITER_FOLIOQ to handle a sequence of folios 2024-09-12 12:20:21 +02:00
seq_buf.c seq_buf: Fix kernel documentation 2024-02-15 12:17:28 -05:00
sg_pool.c lib/sg_pool: change module_init(sg_pool_init) to subsys_initcall 2022-09-23 16:46:19 +02:00
sg_split.c lib: scatterlist: Fix to support no mapped sg 2019-08-08 07:45:01 -06:00
siphash_kunit.c siphash: add missing MODULE_DESCRIPTION() macro 2024-06-24 22:25:07 -07:00
siphash.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
slub_kunit.c slub/kunit: skip test_kfree_rcu when the slub kunit test is built-in 2024-10-02 16:28:46 +02:00
smp_processor_id.c lib/smp_processor_id: fix imbalanced instrumentation_end() call 2022-07-17 17:31:41 -07:00
sort.c lib/sort: optimize heapsort for handling final 2 or 3 elements 2024-06-24 22:25:03 -07:00
stackdepot.c stackdepot: use gfp_nested_mask() instead of open coded masking 2024-05-19 14:40:44 -07:00
stackinit_kunit.c kunit: add missing MODULE_DESCRIPTION() macros to lib/*.c 2024-06-24 22:25:06 -07:00
stmp_device.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
string_helpers_kunit.c string: kunit: add missing MODULE_DESCRIPTION() macros 2024-06-28 08:54:55 -07:00
string_helpers.c lib/string_helpers: rework overflow-dependent code 2024-08-15 09:26:02 -07:00
string_kunit.c string: kunit: add missing MODULE_DESCRIPTION() macros 2024-06-28 08:54:55 -07:00
string.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
strncpy_from_user.c x86: support user address masking instead of non-speculative conditional 2024-08-19 11:31:18 -07:00
strnlen_user.c x86: support user address masking instead of non-speculative conditional 2024-08-19 11:31:18 -07:00
syscall.c sched: Change task_struct::state 2021-06-18 11:43:09 +02:00
test_bitmap.c lib: bitmap: add missing MODULE_DESCRIPTION() macros 2024-06-18 10:40:52 -07:00
test_bitops.c lib/test_bitops: Add benchmark test for fns() 2024-05-09 09:25:08 -07:00
test_bits.c lib/test_bits.c: Add tests for GENMASK_U128() 2024-08-28 06:54:39 -07:00
test_blackhole_dev.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_bpf.c netdev_features: convert NETIF_F_LLTX to dev->lltx 2024-09-03 11:36:43 +02:00
test_debug_virtual.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_dynamic_debug.c dyndbg: add missing MODULE_DESCRIPTION() macro 2024-06-04 17:40:02 +02:00
test_firmware.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_fprobe.c fprobe: Pass return address to the handlers 2023-06-06 21:39:55 +09:00
test_fpu_glue.c lib: fix the NULL vs IS_ERR() bug for debugfs_create_dir() 2024-09-01 20:43:40 -07:00
test_fpu_impl.c selftests/fpu: move FP code to a separate translation unit 2024-05-19 14:36:20 -07:00
test_fpu.h selftests/fpu: move FP code to a separate translation unit 2024-05-19 14:36:20 -07:00
test_free_pages.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_hash.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_hexdump.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_hmm_uapi.h hmm-tests: add test for migrate_device_range() 2022-10-12 18:51:50 -07:00
test_hmm.c lib: test_hmm: use min() to improve dmirror_exclusive() 2024-09-01 20:25:52 -07:00
test_ida.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_kmod.c lib/test_kmod: add missing MODULE_DESCRIPTION() macro 2024-06-24 22:25:07 -07:00
test_kprobes.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_linear_ranges.c lib/test_linear_ranges: add missing MODULE_DESCRIPTION() macro 2024-06-24 22:25:07 -07:00
test_list_sort.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_lockup.c lib/test_lockup: fix kernel pointer check for separate address spaces 2022-02-25 09:36:06 +01:00
test_maple_tree.c test_maple_tree: add the missing MODULE_DESCRIPTION() macro 2024-07-03 19:30:05 -07:00
test_memcat_p.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_meminit.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_min_heap.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_module.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_objagg.c lib: test_objagg: Fix spelling 2024-06-10 11:14:52 +01:00
test_objpool.c lib: test_objpool: add missing MODULE_DESCRIPTION() macro 2024-09-01 20:43:23 -07:00
test_parman.c lib: fix spelling mistake: "actualy" -> "actually" 2017-02-26 11:03:38 -05:00
test_printf.c printf: remove %pGt support 2024-09-03 21:15:42 -07:00
test_ref_tracker.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_rhashtable.c lib/test_rhashtable: add missing MODULE_DESCRIPTION() macro 2024-06-03 18:51:18 -07:00
test_scanf.c vsprintf: add missing MODULE_DESCRIPTION() macro 2024-06-12 13:26:28 +02:00
test_sort.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_static_key_base.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_static_keys.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_sysctl.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
test_ubsan.c ubsan: add missing MODULE_DESCRIPTION() macro 2024-07-03 19:30:05 -07:00
test_uuid.c uuid: add missing MODULE_DESCRIPTION() macro 2024-06-24 22:25:06 -07:00
test_vmalloc.c lib/test_vmalloc.c: use unsigned long constant 2024-03-04 17:01:22 -08:00
test_xarray.c test_xarray: add missing MODULE_DESCRIPTION() macro 2024-07-03 19:30:05 -07:00
test-kstrtox.c KUnit: add missing MODULE_DESCRIPTION() macros for lib/test_*.ko 2024-06-24 22:25:11 -07:00
textsearch.c lib: textsearch: fix escapes in example code 2019-10-03 12:12:23 -04:00
timerqueue.c rbtree, timerqueue: Use rb_add_cached() 2021-02-17 14:08:01 +01:00
trace_readwrite.c lib/trace_readwrite.c:: replace asm-generic/io with linux/io 2023-12-29 12:22:29 -08:00
ts_bm.c lib/ts: add missing MODULE_DESCRIPTION() macros 2024-06-24 22:25:04 -07:00
ts_fsm.c lib/ts: add missing MODULE_DESCRIPTION() macros 2024-06-24 22:25:04 -07:00
ts_kmp.c lib/ts: add missing MODULE_DESCRIPTION() macros 2024-06-24 22:25:04 -07:00
ubsan.c ubsan: Add awareness of signed integer overflow traps 2024-04-15 17:42:43 -07:00
ubsan.h ubsan: Avoid i386 UBSAN handler crashes with Clang 2024-04-24 15:45:38 -07:00
ucmpdi2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
ucs2_string.c lib/ucs2_string: Add UCS-2 strscpy function 2023-09-13 10:18:42 -07:00
union_find.c Union-Find: add a new module in kernel library 2024-07-30 13:04:36 -10:00
usercopy_kunit.c kunit/usercopy: Add missing MODULE_DESCRIPTION() 2024-07-02 10:11:45 -06:00
usercopy.c uaccess: always export _copy_[from|to]_user with CONFIG_RUST 2024-07-08 23:44:01 +02:00
uuid.c treewide: use get_random_bytes() when possible 2022-10-11 17:42:58 -06:00
vsprintf.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
win_minmax.c lib/win_minmax: use /* notation for regular comments 2023-01-11 16:14:21 -08:00
xarray.c The usual shower of singleton fixes and minor series all over MM, 2024-05-19 09:21:03 -07:00
xxhash.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00