From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2B61DC0044C for ; Thu, 1 Nov 2018 16:38:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B9D8B205F4 for ; Thu, 1 Nov 2018 16:38:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B9D8B205F4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by 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AGRZ1gLKTEfVB5pLInQnAwhMbd+RwjCytGx+HxbajmDK64Ll9fyYe5mE e2dKAP7CXh7FMbxwChJL22v7PHIaOBj2oi6oNTwUrnG7I5r9 X-Google-Smtp-Source: AJdET5eiYwQYl0cz8Jc37ypeM01qZW7BAKr2Ax/Wd+XPNiJ7y+tEhr7FBirWLb8vDsrlAnxdMYmaunOFMgvLmCGRE4nhigYWlG+J MIME-Version: 1.0 X-Received: by 2002:a24:906:: with SMTP id 6-v6mr5824501itm.4.1541090283384; Thu, 01 Nov 2018 09:38:03 -0700 (PDT) Date: Thu, 01 Nov 2018 09:38:03 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e8adc105799d0aef@google.com> Subject: possible deadlock in down_trylock (2) From: syzbot To: akpm@linux-foundation.org, ebiederm@xmission.com, guro@fb.com, keescook@chromium.org, kirill.shutemov@linux.intel.com, linux-kernel@vger.kernel.org, luto@amacapital.net, marcos.souza.org@gmail.com, mhocko@kernel.org, riel@surriel.com, syzkaller-bugs@googlegroups.com, wad@chromium.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 27b31e68bc9f bpf: tcp_bpf_recvmsg should return EAGAIN whe.. git tree: bpf console output: https://syzkaller.appspot.com/x/log.txt?x=17443183400000 kernel config: https://syzkaller.appspot.com/x/.config?x=93932074d01b4a5 dashboard link: https://syzkaller.appspot.com/bug?extid=6e438330a01285fbb87a compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=163fd06d400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+6e438330a01285fbb87a@syzkaller.appspotmail.com RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f208e04c6d4 R13: 00000000004efe32 R14: 00000000004cc6e0 R15: 0000000000000007 ====================================================== WARNING: possible circular locking dependency detected 4.19.0+ #73 Not tainted ------------------------------------------------------ syz-executor3/7244 is trying to acquire lock: 00000000e4a4dfcd ((console_sem).lock){-.-.}, at: down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 but task is already holding lock: 000000002036bf76 (&base->lock){..-.}, at: lock_timer_base+0xbb/0x2b0 kernel/time/timer.c:938 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&base->lock){..-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 lock_timer_base+0xbb/0x2b0 kernel/time/timer.c:938 __mod_timer kernel/time/timer.c:1010 [inline] mod_timer kernel/time/timer.c:1102 [inline] add_timer+0x87f/0x15a0 kernel/time/timer.c:1138 __queue_delayed_work+0x249/0x380 kernel/workqueue.c:1533 queue_delayed_work_on+0x1a2/0x1f0 kernel/workqueue.c:1558 queue_delayed_work include/linux/workqueue.h:527 [inline] schedule_delayed_work include/linux/workqueue.h:628 [inline] psi_group_change kernel/sched/psi.c:473 [inline] psi_task_change+0x3f1/0x5f0 kernel/sched/psi.c:522 psi_enqueue kernel/sched/stats.h:82 [inline] enqueue_task kernel/sched/core.c:727 [inline] activate_task+0x1b4/0x470 kernel/sched/core.c:751 wake_up_new_task+0x523/0xcf0 kernel/sched/core.c:2423 _do_fork+0x33b/0x11d0 kernel/fork.c:2238 kernel_thread+0x34/0x40 kernel/fork.c:2272 rest_init+0x28/0x372 init/main.c:408 arch_call_rest_init+0xe/0x1b start_kernel+0xa1f/0xa5a init/main.c:744 x86_64_start_reservations+0x2e/0x30 arch/x86/kernel/head64.c:472 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #2 (&rq->lock){-.-.}: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 rq_lock kernel/sched/sched.h:1126 [inline] task_fork_fair+0xb0/0x6d0 kernel/sched/fair.c:9768 sched_fork+0x443/0xba0 kernel/sched/core.c:2359 copy_process+0x25b8/0x87a0 kernel/fork.c:1886 _do_fork+0x1cb/0x11d0 kernel/fork.c:2213 kernel_thread+0x34/0x40 kernel/fork.c:2272 rest_init+0x28/0x372 init/main.c:408 arch_call_rest_init+0xe/0x1b start_kernel+0xa1f/0xa5a init/main.c:744 x86_64_start_reservations+0x2e/0x30 arch/x86/kernel/head64.c:472 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #1 (&p->pi_lock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 try_to_wake_up+0xdc/0x1490 kernel/sched/core.c:1965 wake_up_process+0x10/0x20 kernel/sched/core.c:2129 __up.isra.1+0x1c0/0x2a0 kernel/locking/semaphore.c:262 up+0x13c/0x1c0 kernel/locking/semaphore.c:187 __up_console_sem+0xbe/0x1b0 kernel/printk/printk.c:237 console_unlock+0x811/0x1190 kernel/printk/printk.c:2433 vprintk_emit+0x391/0x990 kernel/printk/printk.c:1923 vprintk_default+0x28/0x30 kernel/printk/printk.c:1965 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1998 check_stack_usage kernel/exit.c:755 [inline] do_exit.cold.18+0x57/0x16f kernel/exit.c:916 do_group_exit+0x177/0x440 kernel/exit.c:970 __do_sys_exit_group kernel/exit.c:981 [inline] __se_sys_exit_group kernel/exit.c:979 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:979 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 ((console_sem).lock){-.-.}: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xae/0x1f0 kernel/printk/printk.c:220 console_trylock+0x15/0xa0 kernel/printk/printk.c:2248 console_trylock_spinning kernel/printk/printk.c:1654 [inline] vprintk_emit+0x372/0x990 kernel/printk/printk.c:1922 vprintk_default+0x28/0x30 kernel/printk/printk.c:1965 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1998 fail_dump lib/fault-inject.c:44 [inline] should_fail+0xac1/0xd01 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x47/0x730 mm/slab.c:3552 kmem_cache_zalloc include/linux/slab.h:731 [inline] fill_pool lib/debugobjects.c:134 [inline] __debug_object_init+0xbb8/0x1290 lib/debugobjects.c:380 debug_object_init lib/debugobjects.c:432 [inline] debug_object_activate+0x323/0x600 lib/debugobjects.c:513 debug_timer_activate kernel/time/timer.c:709 [inline] debug_activate kernel/time/timer.c:764 [inline] __mod_timer kernel/time/timer.c:1041 [inline] mod_timer kernel/time/timer.c:1102 [inline] add_timer+0x50e/0x15a0 kernel/time/timer.c:1138 __queue_delayed_work+0x249/0x380 kernel/workqueue.c:1533 queue_delayed_work_on+0x1a2/0x1f0 kernel/workqueue.c:1558 queue_delayed_work include/linux/workqueue.h:527 [inline] schedule_delayed_work include/linux/workqueue.h:628 [inline] unaccount_event kernel/events/core.c:4311 [inline] _free_event+0xf27/0x1660 kernel/events/core.c:4419 put_event+0x48/0x60 kernel/events/core.c:4532 perf_event_release_kernel+0x8d0/0x10e0 kernel/events/core.c:4638 perf_release+0x37/0x50 kernel/events/core.c:4648 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: (console_sem).lock --> &rq->lock --> &base->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&base->lock); lock(&rq->lock); lock(&base->lock); lock((console_sem).lock); *** DEADLOCK *** 1 lock held by syz-executor3/7244: #0: 000000002036bf76 (&base->lock){..-.}, at: lock_timer_base+0xbb/0x2b0 kernel/time/timer.c:938 stack backtrace: CPU: 0 PID: 7244 Comm: syz-executor3 Not tainted 4.19.0+ #73 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 print_circular_bug.isra.35.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1863 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2347 [inline] __lock_acquire+0x3399/0x4c20 kernel/locking/lockdep.c:3341 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xae/0x1f0 kernel/printk/printk.c:220 console_trylock+0x15/0xa0 kernel/printk/printk.c:2248 console_trylock_spinning kernel/printk/printk.c:1654 [inline] vprintk_emit+0x372/0x990 kernel/printk/printk.c:1922 vprintk_default+0x28/0x30 kernel/printk/printk.c:1965 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1998 fail_dump lib/fault-inject.c:44 [inline] should_fail+0xac1/0xd01 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x47/0x730 mm/slab.c:3552 kmem_cache_zalloc include/linux/slab.h:731 [inline] fill_pool lib/debugobjects.c:134 [inline] __debug_object_init+0xbb8/0x1290 lib/debugobjects.c:380 debug_object_init lib/debugobjects.c:432 [inline] debug_object_activate+0x323/0x600 lib/debugobjects.c:513 debug_timer_activate kernel/time/timer.c:709 [inline] debug_activate kernel/time/timer.c:764 [inline] __mod_timer kernel/time/timer.c:1041 [inline] mod_timer kernel/time/timer.c:1102 [inline] add_timer+0x50e/0x15a0 kernel/time/timer.c:1138 __queue_delayed_work+0x249/0x380 kernel/workqueue.c:1533 queue_delayed_work_on+0x1a2/0x1f0 kernel/workqueue.c:1558 queue_delayed_work include/linux/workqueue.h:527 [inline] schedule_delayed_work include/linux/workqueue.h:628 [inline] unaccount_event kernel/events/core.c:4311 [inline] _free_event+0xf27/0x1660 kernel/events/core.c:4419 put_event+0x48/0x60 kernel/events/core.c:4532 perf_event_release_kernel+0x8d0/0x10e0 kernel/events/core.c:4638 ? Lost 44 message(s)! kobject: 'loop0' (000000002753bcc3): kobject_uevent_env FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' CPU: 0 PID: 7259 Comm: syz-executor2 Not tainted 4.19.0+ #73 kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x2e0/0x760 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] bpf_prog_array_alloc kernel/bpf/core.c:1587 [inline] bpf_prog_array_copy+0x345/0x420 kernel/bpf/core.c:1726 perf_event_detach_bpf_prog+0x147/0x420 kernel/trace/bpf_trace.c:1015 perf_event_free_bpf_prog kernel/events/core.c:8644 [inline] _free_event+0xf39/0x1660 kernel/events/core.c:4441 put_event+0x48/0x60 kernel/events/core.c:4532 perf_event_release_kernel+0x8d0/0x10e0 kernel/events/core.c:4638 perf_release+0x37/0x50 kernel/events/core.c:4648 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f943721bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007f943721bc90 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f943721c6d4 R13: 00000000004efe32 R14: 00000000004cc6e0 R15: 0000000000000007 kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' CPU: 0 PID: 7388 Comm: syz-executor2 Not tainted 4.19.0+ #73 kobject: 'loop1' (00000000ed884b05): kobject_uevent_env Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007775120b): kobject_uevent_env __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x2e0/0x760 mm/slab.c:3731 kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] bpf_prog_array_alloc kernel/bpf/core.c:1587 [inline] bpf_prog_array_copy+0x345/0x420 kernel/bpf/core.c:1726 perf_event_detach_bpf_prog+0x147/0x420 kernel/trace/bpf_trace.c:1015 kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' perf_event_free_bpf_prog kernel/events/core.c:8644 [inline] _free_event+0xf39/0x1660 kernel/events/core.c:4441 kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' put_event+0x48/0x60 kernel/events/core.c:4532 perf_event_release_kernel+0x8d0/0x10e0 kernel/events/core.c:4638 perf_release+0x37/0x50 kernel/events/core.c:4648 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f943721bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007f943721bc90 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f943721c6d4 R13: 00000000004efe32 R14: 00000000004cc6e0 R15: 0000000000000007 kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop1' (00000000ed884b05): kobject_uevent_env CPU: 1 PID: 7424 Comm: syz-executor2 Not tainted 4.19.0+ #73 kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x2e0/0x760 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] bpf_prog_array_alloc kernel/bpf/core.c:1587 [inline] bpf_prog_array_copy+0x345/0x420 kernel/bpf/core.c:1726 perf_event_detach_bpf_prog+0x147/0x420 kernel/trace/bpf_trace.c:1015 kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' perf_event_free_bpf_prog kernel/events/core.c:8644 [inline] _free_event+0xf39/0x1660 kernel/events/core.c:4441 kobject: 'loop4' (0000000047f33a84): kobject_uevent_env put_event+0x48/0x60 kernel/events/core.c:4532 perf_event_release_kernel+0x8d0/0x10e0 kernel/events/core.c:4638 kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' perf_release+0x37/0x50 kernel/events/core.c:4648 __fput+0x385/0xa30 fs/file_table.c:278 kobject: 'loop1' (00000000ed884b05): kobject_uevent_env ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f943721bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 kobject: 'loop0' (000000002753bcc3): kobject_uevent_env RAX: 0000000000000000 RBX: 00007f943721bc90 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f943721c6d4 R13: 00000000004efe32 R14: 00000000004cc6e0 R15: 0000000000000007 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' CPU: 1 PID: 7432 Comm: syz-executor4 Not tainted 4.19.0+ #73 kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x2e0/0x760 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] bpf_prog_array_alloc kernel/bpf/core.c:1587 [inline] bpf_prog_array_copy+0x345/0x420 kernel/bpf/core.c:1726 perf_event_detach_bpf_prog+0x147/0x420 kernel/trace/bpf_trace.c:1015 perf_event_free_bpf_prog kernel/events/core.c:8644 [inline] _free_event+0xf39/0x1660 kernel/events/core.c:4441 put_event+0x48/0x60 kernel/events/core.c:4532 perf_event_release_kernel+0x8d0/0x10e0 kernel/events/core.c:4638 perf_release+0x37/0x50 kernel/events/core.c:4648 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff243023c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007ff243023c90 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff2430246d4 R13: 00000000004efe32 R14: 00000000004cc6e0 R15: 0000000000000007 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' CPU: 0 PID: 7435 Comm: syz-executor3 Not tainted 4.19.0+ #73 kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x2e0/0x760 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] bpf_prog_array_alloc kernel/bpf/core.c:1587 [inline] bpf_prog_array_copy+0x345/0x420 kernel/bpf/core.c:1726 perf_event_detach_bpf_prog+0x147/0x420 kernel/trace/bpf_trace.c:1015 perf_event_free_bpf_prog kernel/events/core.c:8644 [inline] _free_event+0xf39/0x1660 kernel/events/core.c:4441 put_event+0x48/0x60 kernel/events/core.c:4532 perf_event_release_kernel+0x8d0/0x10e0 kernel/events/core.c:4638 perf_release+0x37/0x50 kernel/events/core.c:4648 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f208e02ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007f208e02ac90 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f208e02b6d4 R13: 00000000004efe32 R14: 00000000004cc6e0 R15: 0000000000000007 FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 7443 Comm: syz-executor0 Not tainted 4.19.0+ #73 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 should_fail_alloc_page mm/page_alloc.c:3069 [inline] prepare_alloc_pages mm/page_alloc.c:4332 [inline] __alloc_pages_nodemask+0x34b/0xde0 mm/page_alloc.c:4370 alloc_pages_current+0x173/0x350 mm/mempolicy.c:2107 alloc_pages include/linux/gfp.h:509 [inline] __get_free_pages+0xc/0x40 mm/page_alloc.c:4420 tlb_next_batch mm/mmu_gather.c:29 [inline] __tlb_remove_page_size+0x2e5/0x500 mm/mmu_gather.c:133 __tlb_remove_page include/asm-generic/tlb.h:187 [inline] zap_pte_range mm/memory.c:1094 [inline] zap_pmd_range mm/memory.c:1193 [inline] zap_pud_range mm/memory.c:1222 [inline] zap_p4d_range mm/memory.c:1243 [inline] unmap_page_range+0x11fb/0x2930 mm/memory.c:1264 unmap_single_vma+0x19b/0x310 mm/memory.c:1309 unmap_vmas+0x125/0x200 mm/memory.c:1339 exit_mmap+0x2be/0x590 mm/mmap.c:3145 __mmput kernel/fork.c:1044 [inline] mmput+0x247/0x610 kernel/fork.c:1065 exit_mm kernel/exit.c:545 [inline] do_exit+0xe74/0x26d0 kernel/exit.c:854 do_group_exit+0x177/0x440 kernel/exit.c:970 get_signal+0x8b0/0x1980 kernel/signal.c:2517 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2d42c7fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007f2d42c7fc90 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2d42c806d4 R13: 00000000004efe32 R14: 00000000004cc6e0 R15: 0000000000000007 kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' CPU: 0 PID: 7675 Comm: syz-executor3 Not tainted 4.19.0+ #73 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x2e0/0x760 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] bpf_prog_array_alloc kernel/bpf/core.c:1587 [inline] bpf_prog_array_copy+0x345/0x420 kernel/bpf/core.c:1726 perf_event_detach_bpf_prog+0x147/0x420 kernel/trace/bpf_trace.c:1015 perf_event_free_bpf_prog kernel/events/core.c:8644 [inline] _free_event+0xf39/0x1660 kernel/events/core.c:4441 put_event+0x48/0x60 kernel/events/core.c:4532 perf_event_release_kernel+0x8d0/0x10e0 kernel/events/core.c:4638 perf_release+0x37/0x50 kernel/events/core.c:4648 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f208e04bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007f208e04bc90 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f208e04c6d4 R13: 00000000004efe32 R14: 00000000004cc6e0 R15: 0000000000000007 kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env CPU: 1 PID: 7694 Comm: syz-executor2 Not tainted 4.19.0+ #73 kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x2e0/0x760 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] bpf_prog_array_alloc kernel/bpf/core.c:1587 [inline] bpf_prog_array_copy+0x345/0x420 kernel/bpf/core.c:1726 perf_event_detach_bpf_prog+0x147/0x420 kernel/trace/bpf_trace.c:1015 perf_event_free_bpf_prog kernel/events/core.c:8644 [inline] _free_event+0xf39/0x1660 kernel/events/core.c:4441 put_event+0x48/0x60 kernel/events/core.c:4532 perf_event_release_kernel+0x8d0/0x10e0 kernel/events/core.c:4638 perf_release+0x37/0x50 kernel/events/core.c:4648 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f943721bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007f943721bc90 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f943721c6d4 R13: 00000000004efe32 R14: 00000000004cc6e0 R15: 0000000000000007 kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' CPU: 1 PID: 7737 Comm: syz-executor0 Not tainted 4.19.0+ #73 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x2e0/0x760 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] bpf_prog_array_alloc kernel/bpf/core.c:1587 [inline] bpf_prog_array_copy+0x345/0x420 kernel/bpf/core.c:1726 perf_event_detach_bpf_prog+0x147/0x420 kernel/trace/bpf_trace.c:1015 perf_event_free_bpf_prog kernel/events/core.c:8644 [inline] _free_event+0xf39/0x1660 kernel/events/core.c:4441 put_event+0x48/0x60 kernel/events/core.c:4532 perf_event_release_kernel+0x8d0/0x10e0 kernel/events/core.c:4638 perf_release+0x37/0x50 kernel/events/core.c:4648 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2d42ca0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007f2d42ca0c90 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2d42ca16d4 R13: 00000000004efe32 R14: 00000000004cc6e0 R15: 0000000000000007 kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' CPU: 1 PID: 7783 Comm: syz-executor1 Not tainted 4.19.0+ #73 kobject: 'loop0' (000000002753bcc3): kobject_uevent_env Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 kobject: 'loop0' (000000002753bcc3): kobject_uevent_env slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x2e0/0x760 mm/slab.c:3731 kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] bpf_prog_array_alloc kernel/bpf/core.c:1587 [inline] bpf_prog_array_copy+0x345/0x420 kernel/bpf/core.c:1726 perf_event_detach_bpf_prog+0x147/0x420 kernel/trace/bpf_trace.c:1015 kobject: 'loop3' (000000007775120b): kobject_uevent_env perf_event_free_bpf_prog kernel/events/core.c:8644 [inline] _free_event+0xf39/0x1660 kernel/events/core.c:4441 kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' put_event+0x48/0x60 kernel/events/core.c:4532 perf_event_release_kernel+0x8d0/0x10e0 kernel/events/core.c:4638 kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000007775120b): kobject_uevent_env perf_release+0x37/0x50 kernel/events/core.c:4648 __fput+0x385/0xa30 fs/file_table.c:278 kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 kobject: 'loop4' (0000000047f33a84): kobject_uevent_env entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f11fb8f1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007f11fb8f1c90 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f11fb8f26d4 R13: 00000000004efe32 R14: 00000000004cc6e0 R15: 0000000000000007 kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000002753bcc3): kobject_uevent_env kobject: 'loop0' (000000002753bcc3): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000ca5f18ac): kobject_uevent_env kobject: 'loop5' (00000000ca5f18ac): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000047f33a84): kobject_uevent_env kobject: 'loop4' (0000000047f33a84): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007775120b): kobject_uevent_env kobject: 'loop3' (000000007775120b): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000003ed2dd85): kobject_uevent_env kobject: 'loop2' (000000003ed2dd85): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000ed884b05): kobject_uevent_env kobject: 'loop1' (00000000ed884b05): fill_kobj_path: path = '/devices/virtual/block/loop1' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 7854 Comm: syz-executor1 Not tainted 4.19.0+ #73 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1578 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x2e0/0x760 mm/slab.c:3731 kmalloc include/linux/slab.h:551 [inline] kzalloc include/linux/slab.h:741 [inline] bpf_prog_array_alloc kernel/bpf/core.c:1587 [inline] bpf_prog_array_copy+0x345/0x420 kernel/bpf/core.c:1726 perf_event_detach_bpf_prog+0x147/0x420 kernel/trace/bpf_trace.c:1015 perf_event_free_bpf_prog kernel/events/core.c:8644 [inline] _free_event+0xf39/0x1660 kernel/events/core.c:4441 put_event+0x48/0x60 kernel/events/core.c:4532 perf_event_release_kernel+0x8d0/0x10e0 kernel/events/core.c:4638 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches