https://github.com/torvalds/linux
Revision 77a63c69ec43f4dc28f4b2d1c933c39e55de6ad8 authored by Yee Lee on 15 July 2021, 04:26:37 UTC, committed by Linus Torvalds on 15 July 2021, 17:13:49 UTC
Issue: when SLUB debug is on, hwtag kasan_unpoison() would overwrite the redzone of object with unaligned size. An additional memzero_explicit() path is added to replacing init by hwtag instruction for those unaligned size at SLUB debug mode. The penalty is acceptable since they are only enabled in debug mode, not production builds. A block of comment is added for explanation. Link: https://lkml.kernel.org/r/20210705103229.8505-3-yee.lee@mediatek.com Signed-off-by: Yee Lee <yee.lee@mediatek.com> Suggested-by: Andrey Konovalov <andreyknvl@gmail.com> Suggested-by: Marco Elver <elver@google.com> Reviewed-by: Marco Elver <elver@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Nicholas Tang <nicholas.tang@mediatek.com> Cc: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 0d4a062
Tip revision: 77a63c69ec43f4dc28f4b2d1c933c39e55de6ad8 authored by Yee Lee on 15 July 2021, 04:26:37 UTC
kasan: add memzero init for unaligned size at DEBUG
kasan: add memzero init for unaligned size at DEBUG
Tip revision: 77a63c6
| File | Mode | Size |
|---|---|---|
| 842 | ||
| crypto | ||
| dim | ||
| fonts | ||
| kunit | ||
| livepatch | ||
| lz4 | ||
| lzo | ||
| math | ||
| mpi | ||
| pldmfw | ||
| raid6 | ||
| reed_solomon | ||
| vdso | ||
| xz | ||
| zlib_deflate | ||
| zlib_dfltcc | ||
| zlib_inflate | ||
| zstd | ||
| .gitignore | -rw-r--r-- | 121 bytes |
| Kconfig | -rw-r--r-- | 16.0 KB |
| Kconfig.debug | -rw-r--r-- | 86.4 KB |
| Kconfig.kasan | -rw-r--r-- | 7.2 KB |
| Kconfig.kcsan | -rw-r--r-- | 8.8 KB |
| Kconfig.kfence | -rw-r--r-- | 3.0 KB |
| Kconfig.kgdb | -rw-r--r-- | 5.6 KB |
| Kconfig.ubsan | -rw-r--r-- | 6.3 KB |
| Makefile | -rw-r--r-- | 12.0 KB |
| argv_split.c | -rw-r--r-- | 2.1 KB |
| ashldi3.c | -rw-r--r-- | 541 bytes |
| ashrdi3.c | -rw-r--r-- | 565 bytes |
| asn1_decoder.c | -rw-r--r-- | 13.2 KB |
| asn1_encoder.c | -rw-r--r-- | 10.3 KB |
| assoc_array.c | -rw-r--r-- | 51.8 KB |
| atomic64.c | -rw-r--r-- | 4.6 KB |
| atomic64_test.c | -rw-r--r-- | 6.4 KB |
| audit.c | -rw-r--r-- | 1.8 KB |
| bcd.c | -rw-r--r-- | 297 bytes |
| bch.c | -rw-r--r-- | 38.3 KB |
| bitfield_kunit.c | -rw-r--r-- | 4.4 KB |
| bitmap.c | -rw-r--r-- | 39.3 KB |
| bitrev.c | -rw-r--r-- | 1.9 KB |
| bootconfig.c | -rw-r--r-- | 19.9 KB |
| bsearch.c | -rw-r--r-- | 1.2 KB |
| btree.c | -rw-r--r-- | 19.2 KB |
| bucket_locks.c | -rw-r--r-- | 1.4 KB |
| bug.c | -rw-r--r-- | 5.9 KB |
| build_OID_registry | -rwxr-xr-x | 4.5 KB |
| buildid.c | -rw-r--r-- | 5.0 KB |
| bust_spinlocks.c | -rw-r--r-- | 676 bytes |
| check_signature.c | -rw-r--r-- | 635 bytes |
| checksum.c | -rw-r--r-- | 4.1 KB |
| clz_ctz.c | -rw-r--r-- | 1.2 KB |
| clz_tab.c | -rw-r--r-- | 891 bytes |
| cmdline.c | -rw-r--r-- | 5.8 KB |
| cmdline_kunit.c | -rw-r--r-- | 4.2 KB |
| cmpdi2.c | -rw-r--r-- | 501 bytes |
| compat_audit.c | -rw-r--r-- | 832 bytes |
| cpu_rmap.c | -rw-r--r-- | 7.6 KB |
| cpumask.c | -rw-r--r-- | 7.1 KB |
| crc-ccitt.c | -rw-r--r-- | 5.6 KB |
| crc-itu-t.c | -rw-r--r-- | 2.7 KB |
| crc-t10dif.c | -rw-r--r-- | 3.2 KB |
| crc16.c | -rw-r--r-- | 2.7 KB |
| crc32.c | -rw-r--r-- | 9.3 KB |
| crc32defs.h | -rw-r--r-- | 1.6 KB |
| crc32test.c | -rw-r--r-- | 37.4 KB |
| crc4.c | -rw-r--r-- | 1003 bytes |
| crc64.c | -rw-r--r-- | 1.8 KB |
| crc7.c | -rw-r--r-- | 2.5 KB |
| crc8.c | -rw-r--r-- | 2.4 KB |
| ctype.c | -rw-r--r-- | 1.4 KB |
| debug_info.c | -rw-r--r-- | 777 bytes |
| debug_locks.c | -rw-r--r-- | 1.2 KB |
| debugobjects.c | -rw-r--r-- | 35.3 KB |
| dec_and_lock.c | -rw-r--r-- | 1.2 KB |
| decompress.c | -rw-r--r-- | 1.8 KB |
| decompress_bunzip2.c | -rw-r--r-- | 23.5 KB |
| decompress_inflate.c | -rw-r--r-- | 4.8 KB |
| decompress_unlz4.c | -rw-r--r-- | 4.2 KB |
| decompress_unlzma.c | -rw-r--r-- | 15.8 KB |
| decompress_unlzo.c | -rw-r--r-- | 6.4 KB |
| decompress_unxz.c | -rw-r--r-- | 10.9 KB |
| decompress_unzstd.c | -rw-r--r-- | 10.2 KB |
| devmem_is_allowed.c | -rw-r--r-- | 687 bytes |
| devres.c | -rw-r--r-- | 13.0 KB |
| digsig.c | -rw-r--r-- | 5.5 KB |
| dump_stack.c | -rw-r--r-- | 3.0 KB |
| dynamic_debug.c | -rw-r--r-- | 28.1 KB |
| dynamic_queue_limits.c | -rw-r--r-- | 4.3 KB |
| earlycpio.c | -rw-r--r-- | 3.6 KB |
| errname.c | -rw-r--r-- | 3.7 KB |
| error-inject.c | -rw-r--r-- | 5.5 KB |
| errseq.c | -rw-r--r-- | 6.6 KB |
| extable.c | -rw-r--r-- | 2.9 KB |
| fault-inject-usercopy.c | -rw-r--r-- | 823 bytes |
| fault-inject.c | -rw-r--r-- | 5.9 KB |
| fdt.c | -rw-r--r-- | 69 bytes |
| fdt_addresses.c | -rw-r--r-- | 79 bytes |
| fdt_empty_tree.c | -rw-r--r-- | 80 bytes |
| fdt_ro.c | -rw-r--r-- | 72 bytes |
| fdt_rw.c | -rw-r--r-- | 72 bytes |
| fdt_strerror.c | -rw-r--r-- | 78 bytes |
| fdt_sw.c | -rw-r--r-- | 72 bytes |
| fdt_wip.c | -rw-r--r-- | 73 bytes |
| find_bit.c | -rw-r--r-- | 3.3 KB |
| find_bit_benchmark.c | -rw-r--r-- | 3.9 KB |
| flex_proportions.c | -rw-r--r-- | 6.8 KB |
| gen_crc32table.c | -rw-r--r-- | 3.3 KB |
| gen_crc64table.c | -rw-r--r-- | 1.4 KB |
| genalloc.c | -rw-r--r-- | 26.4 KB |
| generic-radix-tree.c | -rw-r--r-- | 5.3 KB |
| glob.c | -rw-r--r-- | 3.5 KB |
| globtest.c | -rw-r--r-- | 4.2 KB |
| hexdump.c | -rw-r--r-- | 7.4 KB |
| hweight.c | -rw-r--r-- | 1.9 KB |
| idr.c | -rw-r--r-- | 17.5 KB |
| inflate.c | -rw-r--r-- | 38.7 KB |
| interval_tree.c | -rw-r--r-- | 540 bytes |
| interval_tree_test.c | -rw-r--r-- | 3.4 KB |
| iomap.c | -rw-r--r-- | 9.1 KB |
| iomap_copy.c | -rw-r--r-- | 2.2 KB |
| iommu-helper.c | -rw-r--r-- | 755 bytes |
| iov_iter.c | -rw-r--r-- | 46.8 KB |
| irq_poll.c | -rw-r--r-- | 5.4 KB |
| irq_regs.c | -rw-r--r-- | 394 bytes |
| is_single_threaded.c | -rw-r--r-- | 1.2 KB |
| kasprintf.c | -rw-r--r-- | 1.4 KB |
| kfifo.c | -rw-r--r-- | 12.1 KB |
| klist.c | -rw-r--r-- | 10.4 KB |
| kobject.c | -rw-r--r-- | 28.2 KB |
| kobject_uevent.c | -rw-r--r-- | 18.9 KB |
| kstrtox.c | -rw-r--r-- | 10.7 KB |
| kstrtox.h | -rw-r--r-- | 411 bytes |
| libcrc32c.c | -rw-r--r-- | 2.0 KB |
| linear_ranges.c | -rw-r--r-- | 7.2 KB |
| list-test.c | -rw-r--r-- | 17.4 KB |
| list_debug.c | -rw-r--r-- | 1.8 KB |
| list_sort.c | -rw-r--r-- | 8.2 KB |
| llist.c | -rw-r--r-- | 2.5 KB |
| locking-selftest-hardirq.h | -rw-r--r-- | 246 bytes |
| locking-selftest-mutex.h | -rw-r--r-- | 159 bytes |
| locking-selftest-rlock-hardirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-rlock-softirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-rlock.h | -rw-r--r-- | 197 bytes |
| locking-selftest-rsem.h | -rw-r--r-- | 202 bytes |
| locking-selftest-rtmutex.h | -rw-r--r-- | 162 bytes |
| locking-selftest-softirq.h | -rw-r--r-- | 246 bytes |
| locking-selftest-spin-hardirq.h | -rw-r--r-- | 73 bytes |
| locking-selftest-spin-softirq.h | -rw-r--r-- | 73 bytes |
| locking-selftest-spin.h | -rw-r--r-- | 157 bytes |
| locking-selftest-wlock-hardirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-wlock-softirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-wlock.h | -rw-r--r-- | 197 bytes |
| locking-selftest-wsem.h | -rw-r--r-- | 202 bytes |
| locking-selftest.c | -rw-r--r-- | 63.7 KB |
| lockref.c | -rw-r--r-- | 4.5 KB |
| logic_iomem.c | -rw-r--r-- | 7.0 KB |
| logic_pio.c | -rw-r--r-- | 8.5 KB |
| lru_cache.c | -rw-r--r-- | 18.8 KB |
| lshrdi3.c | -rw-r--r-- | 559 bytes |
| memcat_p.c | -rw-r--r-- | 753 bytes |
| memory-notifier-error-inject.c | -rw-r--r-- | 1.1 KB |
| memregion.c | -rw-r--r-- | 429 bytes |
| memweight.c | -rw-r--r-- | 1.0 KB |
| muldi3.c | -rw-r--r-- | 1.7 KB |
| net_utils.c | -rw-r--r-- | 640 bytes |
| netdev-notifier-error-inject.c | -rw-r--r-- | 1.5 KB |
| nlattr.c | -rw-r--r-- | 26.9 KB |
| nmi_backtrace.c | -rw-r--r-- | 3.1 KB |
| nodemask.c | -rw-r--r-- | 653 bytes |
| notifier-error-inject.c | -rw-r--r-- | 2.5 KB |
| notifier-error-inject.h | -rw-r--r-- | 653 bytes |
| objagg.c | -rw-r--r-- | 28.3 KB |
| of-reconfig-notifier-error-inject.c | -rw-r--r-- | 1.3 KB |
| oid_registry.c | -rw-r--r-- | 4.4 KB |
| once.c | -rw-r--r-- | 1.4 KB |
| packing.c | -rw-r--r-- | 6.6 KB |
| parman.c | -rw-r--r-- | 10.6 KB |
| parser.c | -rw-r--r-- | 8.9 KB |
| pci_iomap.c | -rw-r--r-- | 4.2 KB |
| percpu-refcount.c | -rw-r--r-- | 15.3 KB |
| percpu_counter.c | -rw-r--r-- | 6.4 KB |
| percpu_test.c | -rw-r--r-- | 3.2 KB |
| plist.c | -rw-r--r-- | 5.9 KB |
| pm-notifier-error-inject.c | -rw-r--r-- | 1.2 KB |
| radix-tree.c | -rw-r--r-- | 43.1 KB |
| random32.c | -rw-r--r-- | 18.5 KB |
| ratelimit.c | -rw-r--r-- | 1.6 KB |
| rbtree.c | -rw-r--r-- | 17.1 KB |
| rbtree_test.c | -rw-r--r-- | 9.4 KB |
| refcount.c | -rw-r--r-- | 4.8 KB |
| rhashtable.c | -rw-r--r-- | 29.5 KB |
| sbitmap.c | -rw-r--r-- | 16.4 KB |
| scatterlist.c | -rw-r--r-- | 27.3 KB |
| seq_buf.c | -rw-r--r-- | 10.0 KB |
| sg_pool.c | -rw-r--r-- | 4.2 KB |
| sg_split.c | -rw-r--r-- | 5.0 KB |
| sha1.c | -rw-r--r-- | 6.3 KB |
| show_mem.c | -rw-r--r-- | 1.1 KB |
| siphash.c | -rw-r--r-- | 11.9 KB |
| slub_kunit.c | -rw-r--r-- | 3.3 KB |
| smp_processor_id.c | -rw-r--r-- | 1.4 KB |
| sort.c | -rw-r--r-- | 8.4 KB |
| stackdepot.c | -rw-r--r-- | 10.1 KB |
| stmp_device.c | -rw-r--r-- | 1.9 KB |
| string.c | -rw-r--r-- | 25.7 KB |
| string_helpers.c | -rw-r--r-- | 15.8 KB |
| strncpy_from_user.c | -rw-r--r-- | 3.9 KB |
| strnlen_user.c | -rw-r--r-- | 3.3 KB |
| syscall.c | -rw-r--r-- | 2.7 KB |
| test-kstrtox.c | -rw-r--r-- | 17.3 KB |
| test-string_helpers.c | -rw-r--r-- | 14.9 KB |
| test_bitmap.c | -rw-r--r-- | 18.9 KB |
| test_bitops.c | -rw-r--r-- | 2.5 KB |
| test_bits.c | -rw-r--r-- | 1.8 KB |
| test_blackhole_dev.c | -rw-r--r-- | 2.5 KB |
| test_bpf.c | -rw-r--r-- | 160.4 KB |
| test_debug_virtual.c | -rw-r--r-- | 981 bytes |
| test_firmware.c | -rw-r--r-- | 27.7 KB |
| test_fpu.c | -rw-r--r-- | 2.0 KB |
| test_free_pages.c | -rw-r--r-- | 995 bytes |
| test_hash.c | -rw-r--r-- | 6.3 KB |
| test_hexdump.c | -rw-r--r-- | 6.3 KB |
| test_hmm.c | -rw-r--r-- | 29.4 KB |
| test_hmm_uapi.h | -rw-r--r-- | 2.4 KB |
| test_ida.c | -rw-r--r-- | 4.3 KB |
| test_kasan.c | -rw-r--r-- | 29.4 KB |
| test_kasan_module.c | -rw-r--r-- | 3.4 KB |
| test_kmod.c | -rw-r--r-- | 29.9 KB |
| test_linear_ranges.c | -rw-r--r-- | 7.5 KB |
| test_list_sort.c | -rw-r--r-- | 3.3 KB |
| test_lockup.c | -rw-r--r-- | 16.3 KB |
| test_memcat_p.c | -rw-r--r-- | 2.2 KB |
| test_meminit.c | -rw-r--r-- | 9.7 KB |
| test_min_heap.c | -rw-r--r-- | 4.3 KB |
| test_module.c | -rw-r--r-- | 794 bytes |
| test_objagg.c | -rw-r--r-- | 24.6 KB |
| test_overflow.c | -rw-r--r-- | 22.3 KB |
| test_parman.c | -rw-r--r-- | 11.2 KB |
| test_printf.c | -rw-r--r-- | 19.1 KB |
| test_rhashtable.c | -rw-r--r-- | 20.0 KB |
| test_scanf.c | -rw-r--r-- | 27.4 KB |
| test_siphash.c | -rw-r--r-- | 7.5 KB |
| test_sort.c | -rw-r--r-- | 870 bytes |
| test_stackinit.c | -rw-r--r-- | 11.3 KB |
| test_static_key_base.c | -rw-r--r-- | 1.6 KB |
| test_static_keys.c | -rw-r--r-- | 5.6 KB |
| test_string.c | -rw-r--r-- | 3.9 KB |
| test_strscpy.c | -rw-r--r-- | 4.0 KB |
| test_sysctl.c | -rw-r--r-- | 3.9 KB |
| test_ubsan.c | -rw-r--r-- | 2.9 KB |
| test_user_copy.c | -rw-r--r-- | 9.1 KB |
| test_uuid.c | -rw-r--r-- | 3.4 KB |
| test_vmalloc.c | -rw-r--r-- | 10.8 KB |
| test_xarray.c | -rw-r--r-- | 46.8 KB |
| textsearch.c | -rw-r--r-- | 9.3 KB |
| timerqueue.c | -rw-r--r-- | 2.3 KB |
| ts_bm.c | -rw-r--r-- | 5.1 KB |
| ts_fsm.c | -rw-r--r-- | 10.4 KB |
| ts_kmp.c | -rw-r--r-- | 4.1 KB |
| ubsan.c | -rw-r--r-- | 9.9 KB |
| ubsan.h | -rw-r--r-- | 1.8 KB |
| ucmpdi2.c | -rw-r--r-- | 568 bytes |
| ucs2_string.c | -rw-r--r-- | 2.5 KB |
| usercopy.c | -rw-r--r-- | 2.2 KB |
| uuid.c | -rw-r--r-- | 2.9 KB |
| vsprintf.c | -rw-r--r-- | 87.1 KB |
| win_minmax.c | -rw-r--r-- | 3.4 KB |
| xarray.c | -rw-r--r-- | 58.5 KB |
| xxhash.c | -rw-r--r-- | 12.7 KB |
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