On Sun, Oct 02, 2022 at 01:24:23PM +0900, Hyeonggon Yoo wrote: > Hi guys, yesterday I just built and booted latest mm-everything, > and I got following report from KUNIT test. > > Environment: > - x86_64, gcc 11.2.0 > - mm-everything (tag: mm-everything-2022-10-01-01-55) > - config attached > > Report (stacktrace decoded): FYI, below is the bad commit from git bisection ;) Thanks! 065530b966a42d63f214ba40427dc8d00345f573 is the first bad commit commit 065530b966a42d63f214ba40427dc8d00345f573 Author: SeongJae Park <sj@xxxxxxxxxx> Date: Fri Sep 9 20:28:57 2022 +0000 mm/damon/core-test: test damon_set_regions Preceding commit fixes a bug in 'damon_set_regions()', which allows holes in the new monitoring target ranges. This commit adds a kunit test case for the problem to avoid any regression. Link: https://lkml.kernel.org/r/20220909202901.57977-4-sj@xxxxxxxxxx Signed-off-by: SeongJae Park <sj@xxxxxxxxxx> Cc: Brendan Higgins <brendanhiggins@xxxxxxxxxx> Cc: Jonathan Corbet <corbet@xxxxxxx> Cc: Shuah Khan <shuah@xxxxxxxxxx> Cc: Yun Levi <ppbuk5246@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> mm/damon/core-test.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) > [ 37.158892] ok 5 - damon_test_merge_two > [ 37.159934] ok 6 - damon_test_merge_regions_of > [ 37.196173] ok 7 - damon_test_split_regions_of > [ 37.198029] ok 8 - damon_test_ops_registration > [ 37.199802] list_del corruption, ffff88811f1c21a0->next is NULL > [ 37.201069] ------------[ cut here ]------------ > [ 37.201553] kernel BUG at lib/list_debug.c:49! > [ 37.202026] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI > [ 37.202632] CPU: 16 PID: 375 Comm: kunit_try_catch Tainted: G B N 6.0.0-rc3+ #1841 > [ 37.203544] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014 > [ 37.204680] RIP: 0010:__list_del_entry_valid.cold (lib/list_debug.c:49 (discriminator 3)) > [ 37.205642] Code: c7 c7 20 b9 51 83 e8 a3 08 fd ff 0f 0b 48 c7 c7 c0 b8 51 83 e8 95 08 fd ff 0f 0b 48 89 ee 48 c7 c7 80 ba 51 83 e8 84 08 fd ff <0f> 0b 4c 89 e1 4c 89 f6 48 c7 c7 80 bc 51 83 e8 70 08 fd ff 0f 0b > All code > ======== > 0: c7 c7 20 b9 51 83 mov $0x8351b920,%edi > 6: e8 a3 08 fd ff call 0xfffffffffffd08ae > b: 0f 0b ud2 > d: 48 c7 c7 c0 b8 51 83 mov $0xffffffff8351b8c0,%rdi > 14: e8 95 08 fd ff call 0xfffffffffffd08ae > 19: 0f 0b ud2 > 1b: 48 89 ee mov %rbp,%rsi > 1e: 48 c7 c7 80 ba 51 83 mov $0xffffffff8351ba80,%rdi > 25: e8 84 08 fd ff call 0xfffffffffffd08ae > 2a:* 0f 0b ud2 <-- trapping instruction > 2c: 4c 89 e1 mov %r12,%rcx > 2f: 4c 89 f6 mov %r14,%rsi > 32: 48 c7 c7 80 bc 51 83 mov $0xffffffff8351bc80,%rdi > 39: e8 70 08 fd ff call 0xfffffffffffd08ae > 3e: 0f 0b ud2 > > Code starting with the faulting instruction > =========================================== > 0: 0f 0b ud2 > 2: 4c 89 e1 mov %r12,%rcx > 5: 4c 89 f6 mov %r14,%rsi > 8: 48 c7 c7 80 bc 51 83 mov $0xffffffff8351bc80,%rdi > f: e8 70 08 fd ff call 0xfffffffffffd0884 > 14: 0f 0b ud2 > [ 37.209099] RSP: 0018:ffff88811f9e7d48 EFLAGS: 00010286 > [ 37.210008] RAX: 0000000000000033 RBX: ffff88811f1c2170 RCX: 0000000000000000 > [ 37.211292] RDX: ffff888113d736c0 RSI: 0000000000000000 RDI: ffffed1023f3cf9b > [ 37.212637] RBP: ffff88811f1c21a0 R08: 0000000000000033 R09: ffff88811f9e7a47 > [ 37.213961] R10: 0000000080000000 R11: 0000000000000001 R12: 0000000000000000 > [ 37.215324] R13: 0000000000000000 R14: ffff88811f1c21a8 R15: 000000000000001c > [ 37.216678] FS: 0000000000000000(0000) GS:ffff8881e3600000(0000) knlGS:0000000000000000 > [ 37.218165] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 37.219225] CR2: 00007fd98b8a3e40 CR3: 000000000442c000 CR4: 0000000000750ee0 > [ 37.220622] PKRU: 55555554 > [ 37.221132] Call Trace: > [ 37.221554] <TASK> > [ 37.221927] damon_test_set_regions (./include/linux/list.h:134 ./include/linux/list.h:148 mm/damon/core.c:354 mm/damon/core.c:368 mm/damon/core-test.h:289) > [ 37.222765] ? damon_set_regions (mm/damon/core-test.h:271) > [ 37.223571] ? rcu_read_lock_sched_held (kernel/rcu/update.c:104 kernel/rcu/update.c:123) > [ 37.224495] ? lock_acquire (kernel/locking/lockdep.c:5639) > [ 37.225203] ? lock_release (kernel/locking/lockdep.c:115 kernel/locking/lockdep.c:5679) > [ 37.225912] ? rcu_read_lock_sched_held (kernel/rcu/update.c:104 kernel/rcu/update.c:123) > [ 37.226806] ? __kthread_parkme (./include/linux/instrumented.h:72 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 kernel/kthread.c:270) > [ 37.227587] ? lock_acquired (kernel/locking/lockdep.c:115 kernel/locking/lockdep.c:5913) > [ 37.228357] ? lock_downgrade (kernel/locking/lockdep.c:5674) > [ 37.229127] ? io_schedule_timeout (kernel/sched/core.c:6391) > [ 37.229940] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4273) > [ 37.230864] ? kunit_try_catch_throw (lib/kunit/try-catch.c:25) > [ 37.231699] kunit_try_run_case (lib/kunit/test.c:382) > [ 37.232492] ? kunit_catch_run_case (lib/kunit/test.c:367) > [ 37.233310] ? kunit_try_catch_throw (lib/kunit/try-catch.c:25) > [ 37.234099] kunit_generic_run_threadfn_adapter (lib/kunit/try-catch.c:30) > [ 37.235099] kthread (kernel/kthread.c:376) > [ 37.235663] ? kthread_complete_and_exit (kernel/kthread.c:331) > [ 37.236556] ret_from_fork (arch/x86/entry/entry_64.S:312) > [ 37.237242] </TASK> > [ 37.237662] Modules linked in: > [ 37.238298] ---[ end trace 0000000000000000 ]--- > [ 37.239157] RIP: 0010:__list_del_entry_valid.cold (lib/list_debug.c:49 (discriminator 3)) > [ 37.240247] Code: c7 c7 20 b9 51 83 e8 a3 08 fd ff 0f 0b 48 c7 c7 c0 b8 51 83 e8 95 08 fd ff 0f 0b 48 89 ee 48 c7 c7 80 ba 51 83 e8 84 08 fd ff <0f> 0b 4c 89 e1 4c 89 f6 48 c7 c7 80 bc 51 83 e8 70 08 fd ff 0f 0b > All code > ======== > 0: c7 c7 20 b9 51 83 mov $0x8351b920,%edi > 6: e8 a3 08 fd ff call 0xfffffffffffd08ae > b: 0f 0b ud2 > d: 48 c7 c7 c0 b8 51 83 mov $0xffffffff8351b8c0,%rdi > 14: e8 95 08 fd ff call 0xfffffffffffd08ae > 19: 0f 0b ud2 > 1b: 48 89 ee mov %rbp,%rsi > 1e: 48 c7 c7 80 ba 51 83 mov $0xffffffff8351ba80,%rdi > 25: e8 84 08 fd ff call 0xfffffffffffd08ae > 2a:* 0f 0b ud2 <-- trapping instruction > 2c: 4c 89 e1 mov %r12,%rcx > 2f: 4c 89 f6 mov %r14,%rsi > 32: 48 c7 c7 80 bc 51 83 mov $0xffffffff8351bc80,%rdi > 39: e8 70 08 fd ff call 0xfffffffffffd08ae > 3e: 0f 0b ud2 > > Code starting with the faulting instruction > =========================================== > 0: 0f 0b ud2 > 2: 4c 89 e1 mov %r12,%rcx > 5: 4c 89 f6 mov %r14,%rsi > 8: 48 c7 c7 80 bc 51 83 mov $0xffffffff8351bc80,%rdi > f: e8 70 08 fd ff call 0xfffffffffffd0884 > 14: 0f 0b ud2 > [ 37.243633] RSP: 0018:ffff88811f9e7d48 EFLAGS: 00010286 > [ 37.244691] RAX: 0000000000000033 RBX: ffff88811f1c2170 RCX: 0000000000000000 > [ 37.246006] RDX: ffff888113d736c0 RSI: 0000000000000000 RDI: ffffed1023f3cf9b > [ 37.247321] RBP: ffff88811f1c21a0 R08: 0000000000000033 R09: ffff88811f9e7a47 > [ 37.248700] R10: 0000000080000000 R11: 0000000000000001 R12: 0000000000000000 > [ 37.250023] R13: 0000000000000000 R14: ffff88811f1c21a8 R15: 000000000000001c > [ 37.251355] FS: 0000000000000000(0000) GS:ffff8881e3600000(0000) knlGS:0000000000000000 > [ 37.252914] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 37.254000] CR2: 00007fd98b8a3e40 CR3: 000000000442c000 CR4: 0000000000750ee0 > [ 37.255357] PKRU: 55555554 > > -- > Thanks, > Hyeonggon
