Greetings, 0day kernel testing robot got the below dmesg and the first bad commit is https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master commit 42cc27ddece13e7bcac2d1882c35066aff76d60b Author: Patricia Alfonso AuthorDate: Fri Sep 25 14:50:16 2020 +1000 Commit: Stephen Rothwell CommitDate: Sun Sep 27 17:23:34 2020 +1000 KASAN: Port KASAN Tests to KUnit Transfer all previous tests for KASAN to KUnit so they can be run more easily. Using kunit_tool, developers can run these tests with their other KUnit tests and see "pass" or "fail" with the appropriate KASAN report instead of needing to parse each KASAN report to test KASAN functionalities. All KASAN reports are still printed to dmesg. Stack tests do not work properly when KASAN_STACK is enabled so those tests use a check for "if IS_ENABLED(CONFIG_KASAN_STACK)" so they only run if stack instrumentation is enabled. If KASAN_STACK is not enabled, KUnit will print a statement to let the user know this test was not run with KASAN_STACK enabled. copy_user_test and kasan_rcu_uaf cannot be run in KUnit so there is a separate test file for those tests, which can be run as before as a module. Link: https://lkml.kernel.org/r/20200910070331.3358048-4-davidgow@google.com Signed-off-by: Patricia Alfonso Signed-off-by: David Gow Reviewed-by: Brendan Higgins Reviewed-by: Andrey Konovalov Reviewed-by: Dmitry Vyukov Tested-by: Andrey Konovalov Cc: Andrey Ryabinin Cc: Ingo Molnar Cc: Juri Lelli Cc: Peter Zijlstra Cc: Shuah Khan Cc: Vincent Guittot Signed-off-by: Andrew Morton Signed-off-by: Stephen Rothwell 77a8004d0e KUnit: KASAN Integration 42cc27ddec KASAN: Port KASAN Tests to KUnit +--------------------------------------------+------------+------------+ | | 77a8004d0e | 42cc27ddec | +--------------------------------------------+------------+------------+ | boot_successes | 32 | 0 | | boot_failures | 0 | 15 | | BUG:KASAN:slab-out-of-bounds_in_k | 0 | 15 | | BUG:KASAN:out-of-bounds_in_k | 0 | 15 | | BUG:KASAN:use-after-free_in_k | 0 | 15 | | BUG:KASAN:global-out-of-bounds_in_k | 0 | 15 | | BUG:KASAN:stack-out-of-bounds_in_k | 0 | 15 | | BUG:KASAN:alloca-out-of-bounds_in_k | 0 | 15 | | BUG:KASAN:double-free_or_invalid-free_in_k | 0 | 15 | | BUG:KASAN:slab-out-of-bounds_in_t | 0 | 15 | | BUG:KASAN:vmalloc-out-of-bounds_in_v | 0 | 15 | +--------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot [ 14.465638] Btrfs loaded, crc32c=crc32c-generic, debug=on, ref-verify=on [ 14.469661] Key type big_key registered [ 14.473561] # Subtest: kasan [ 14.473569] 1..36 [ 14.481549] ================================================================== [ 14.487271] BUG: KASAN: slab-out-of-bounds in kmalloc_oob_right+0x190/0x26c [ 14.490566] Write of size 1 at addr ffff8881ee42f47b by task kunit_try_catch/220 [ 14.493839] [ 14.496419] CPU: 1 PID: 220 Comm: kunit_try_catch Not tainted 5.9.0-rc6-00463-g42cc27ddece13 #1 [ 14.500161] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 14.507888] Call Trace: [ 14.511057] dump_stack+0x96/0xc4 [ 14.514227] print_address_description+0x21/0x41f [ 14.517722] ? _raw_spin_lock_irqsave+0x91/0xe1 [ 14.521245] ? _raw_write_lock_irqsave+0x33/0x33 [ 14.527489] ? kmalloc_oob_right+0x190/0x26c [ 14.531050] kasan_report+0x14c/0x187 [ 14.534502] ? kmalloc_oob_right+0x190/0x26c [ 14.538064] __asan_report_store1_noabort+0x17/0x19 [ 14.541623] kmalloc_oob_right+0x190/0x26c [ 14.545329] ? kmalloc_oob_left+0x29c/0x29c [ 14.549033] ? kunit_binary_str_assert_format+0x178/0x178 [ 14.553015] ? finish_task_switch+0x37f/0x4d3 [ 14.556934] ? preempt_latency_start+0x23/0x80 [ 14.560866] ? __kasan_check_write+0x14/0x16 [ 14.564827] ? _raw_spin_lock_irqsave+0x91/0xe1 [ 14.568689] ? _raw_write_lock_irqsave+0x33/0x33 [ 14.572620] ? _raw_spin_lock_irqsave+0x91/0xe1 [ 14.576343] ? _raw_write_lock_irqsave+0x33/0x33 [ 14.580190] kunit_try_run_case+0x1d8/0x221 [ 14.583805] ? kunit_do_assertion+0x570/0x570 [ 14.587697] kunit_generic_run_threadfn_adapter+0x55/0x87 [ 14.591474] kthread+0x341/0x350 [ 14.595113] ? kunit_try_catch_throw+0x6c/0x6c [ 14.598993] ? kthread_create_worker_on_cpu+0xce/0xce [ 14.602975] ret_from_fork+0x22/0x30 [ 14.606711] [ 14.610327] Allocated by task 220: [ 14.614000] kasan_save_stack+0x23/0x4d [ 14.617714] kasan_set_track+0x20/0x26 [ 14.621373] __kasan_kmalloc+0x7b/0x8a [ 14.625275] kasan_kmalloc+0x9/0xb [ 14.628905] kmalloc_oob_right+0xc4/0x26c [ 14.632594] kunit_try_run_case+0x1d8/0x221 [ 14.636089] kunit_generic_run_threadfn_adapter+0x55/0x87 [ 14.639805] kthread+0x341/0x350 [ 14.643246] ret_from_fork+0x22/0x30 [ 14.646700] [ 14.652903] The buggy address belongs to the object at ffff8881ee42f400 [ 14.652903] which belongs to the cache kmalloc-128 of size 128 [ 14.660520] The buggy address is located 123 bytes inside of [ 14.660520] 128-byte region [ffff8881ee42f400, ffff8881ee42f480) # HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD git bisect start 49e7e3e905e437a02782019570f70997e2da9101 v5.8 -- git bisect good d849ca483dba7546ad176da83bf66d1c013725f6 # 00:35 G 10 0 0 0 Merge tag 'io_uring-5.9-2020-09-04' of git://git.kernel.dk/linux-block git bisect good e62584618d93201358c3e897f9595fcd28aa925d # 00:53 G 10 0 0 0 Merge remote-tracking branch 'arm64/for-next/core' into master git bisect good 006eef11777e23ffdb60ccf45be817770318bacb # 01:14 G 11 0 0 0 Merge remote-tracking branch 'mtd/mtd/next' into master git bisect good 2061dc795bd8a07388636092652fa0abc5cf07ef # 01:36 G 11 0 0 0 Merge remote-tracking branch 'chrome-platform/for-next' into master git bisect good 9bb4ec01566d43b32e335af167631bac1adf3174 # 02:50 G 10 0 1 1 Merge remote-tracking branch 'pwm/for-next' into master git bisect good d3fc492211d3935c3ba570d80758888bc985213a # 03:49 G 10 0 0 0 Merge remote-tracking branch 'nvmem/for-next' into master git bisect good cb38a851eb8a18edf44797040ac2c3075ca4ddc1 # 04:19 G 11 0 0 0 Merge remote-tracking branch 'trivial/for-next' into master git bisect good b2a6843cfff9cab0387e0fd9316dcbc57a6068e7 # 05:23 G 10 0 0 0 Merge remote-tracking branch 'memblock/for-next' into master git bisect bad 3f91859d3d7941000d51704d11ad4835f2026bfe # 06:13 B 0 1 10 0 Merge branch 'akpm-current/current' into master git bisect bad eec17018489b6a5bd5d04cd8e884f0bffb6ff948 # 07:03 B 0 2 11 0 hugetlb: add lockdep check for i_mmap_rwsem held in huge_pmd_share git bisect good 4ea9429970547632b609cebd4135d086407c3c55 # 08:17 G 10 0 0 3 mm: add find_lock_head git bisect good e0c358f3a1cc904f8e05515c07b868286dd402e2 # 08:51 G 10 0 0 0 mm/mmap.c: use helper function allow_write_access() in __remove_shared_vm_struct() git bisect bad a3f39c26a8db0040c8a2ad1b9eeb3ac5ec517706 # 09:07 B 0 3 13 1 mm, isolation: avoid checking unmovable pages across pageblock boundary git bisect good 77a8004d0e0420aab36d80eee23fef1813853eaf # 10:30 G 11 0 1 1 KUnit: KASAN Integration git bisect bad 71b5099c7c2247f0072575ecc755e1e789058fb1 # 11:17 B 0 3 13 1 mm/page_alloc: tweak comments in has_unmovable_pages() git bisect bad 1c5d1dcc17456092bbdb51470ab88157bb3c7867 # 11:50 B 0 8 22 5 kasan-port-kasan-tests-to-kunit-v14 git bisect bad 42cc27ddece13e7bcac2d1882c35066aff76d60b # 12:07 B 0 9 21 3 KASAN: Port KASAN Tests to KUnit # first bad commit: [42cc27ddece13e7bcac2d1882c35066aff76d60b] KASAN: Port KASAN Tests to KUnit git bisect good 77a8004d0e0420aab36d80eee23fef1813853eaf # 12:17 G 31 0 0 1 KUnit: KASAN Integration # extra tests with debug options git bisect bad 42cc27ddece13e7bcac2d1882c35066aff76d60b # 12:37 B 0 4 14 1 KASAN: Port KASAN Tests to KUnit --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/lkp@lists.01.org