From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-it1-f199.google.com (mail-it1-f199.google.com [209.85.166.199]) by kanga.kvack.org (Postfix) with ESMTP id 9A18F8E0002 for ; Wed, 16 Jan 2019 21:33:06 -0500 (EST) Received: by mail-it1-f199.google.com with SMTP id b14so3679062itd.1 for ; Wed, 16 Jan 2019 18:33:06 -0800 (PST) Received: from mail-sor-f69.google.com (mail-sor-f69.google.com. [209.85.220.69]) by mx.google.com with SMTPS id r204sor257914ita.16.2019.01.16.18.33.04 for (Google Transport Security); Wed, 16 Jan 2019 18:33:04 -0800 (PST) MIME-Version: 1.0 Date: Wed, 16 Jan 2019 18:33:04 -0800 Message-ID: <000000000000cdc61b057f9e360e@google.com> Subject: kernel BUG at mm/page_alloc.c:LINE! From: syzbot Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: owner-linux-mm@kvack.org List-ID: To: akpm@linux-foundation.org, iamjoonsoo.kim@lge.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mgorman@techsingularity.net, mhocko@suse.com, sfr@canb.auug.org.au, syzkaller-bugs@googlegroups.com, vbabka@suse.cz Hello, syzbot found the following crash on: HEAD commit: b808822a75a3 Add linux-next specific files for 20190111 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=16a471d8c00000 kernel config: https://syzkaller.appspot.com/x/.config?x=c052ead0aed5001b dashboard link: https://syzkaller.appspot.com/bug?extid=80dd4798c16c634daf15 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+80dd4798c16c634daf15@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at mm/page_alloc.c:3112! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 1043 Comm: kcompactd0 Not tainted 5.0.0-rc1-next-20190111 #10 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__isolate_free_page+0x4a8/0x680 mm/page_alloc.c:3112 Code: 4c 39 e3 77 c0 0f b6 8d 74 ff ff ff b8 01 00 00 00 48 d3 e0 e9 11 fd ff ff 48 c7 c6 a0 63 52 88 4c 89 e7 e8 6a 14 10 00 0f 0b <0f> 0b 48 c7 c6 c0 64 52 88 4c 89 e7 e8 57 14 10 00 0f 0b 48 89 cf RSP: 0000:ffff8880a78e6f58 EFLAGS: 00010007 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88812fffc7e0 RDX: 1ffff11025fff8fc RSI: 0000000000000007 RDI: ffff88812fffc7b0 RBP: ffff8880a78e7018 R08: ffff8880a78ce000 R09: ffffed1014f1cdf2 R10: ffffed1014f1cdf1 R11: 0000000000000003 R12: ffff88812fffc7b0 R13: 1ffff11014f1cdf2 R14: ffff88812fffc7b0 R15: ffff8880a78e6ff0 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000438ca0 CR3: 0000000009871000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: fast_isolate_freepages mm/compaction.c:1356 [inline] isolate_freepages mm/compaction.c:1429 [inline] compaction_alloc+0xd05/0x2970 mm/compaction.c:1541 unmap_and_move mm/migrate.c:1177 [inline] migrate_pages+0x48e/0x2cc0 mm/migrate.c:1417 compact_zone+0x2207/0x3e90 mm/compaction.c:2173 kcompactd_do_work+0x6de/0x1200 mm/compaction.c:2564 kcompactd+0x251/0x970 mm/compaction.c:2657 kthread+0x357/0x430 kernel/kthread.c:247 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: ====================================================== WARNING: possible circular locking dependency detected 5.0.0-rc1-next-20190111 #10 Not tainted ------------------------------------------------------ kcompactd0/1043 is trying to acquire lock: 00000000a0848583 (console_owner){-.-.}, at: log_next kernel/printk/printk.c:499 [inline] 00000000a0848583 (console_owner){-.-.}, at: console_unlock+0x4ac/0x1040 kernel/printk/printk.c:2442 but task is already holding lock: 00000000c8e67de2 (&(&zone->lock)->rlock){..-.}, at: fast_isolate_freepages mm/compaction.c:1313 [inline] 00000000c8e67de2 (&(&zone->lock)->rlock){..-.}, at: isolate_freepages mm/compaction.c:1429 [inline] 00000000c8e67de2 (&(&zone->lock)->rlock){..-.}, at: compaction_alloc+0x6f3/0x2970 mm/compaction.c:1541 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&(&zone->lock)->rlock){..-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 rmqueue mm/page_alloc.c:3253 [inline] get_page_from_freelist+0xf6c/0x4870 mm/page_alloc.c:3668 __alloc_pages_nodemask+0x4fd/0xdc0 mm/page_alloc.c:4714 alloc_pages_current+0x107/0x210 mm/mempolicy.c:2106 alloc_pages include/linux/gfp.h:509 [inline] depot_save_stack+0x3da/0x460 lib/stackdepot.c:260 save_stack+0xa9/0xd0 mm/kasan/common.c:79 set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc mm/kasan/common.c:496 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469 kasan_kmalloc mm/kasan/common.c:504 [inline] kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:411 slab_post_alloc_hook mm/slab.h:440 [inline] slab_alloc mm/slab.c:3381 [inline] __do_kmalloc mm/slab.c:3709 [inline] __kmalloc+0x145/0x740 mm/slab.c:3720 kmalloc include/linux/slab.h:550 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:175 [inline] __tty_buffer_request_room+0x2bf/0x7e0 drivers/tty/tty_buffer.c:273 tty_insert_flip_string_fixed_flag+0x93/0x1f0 drivers/tty/tty_buffer.c:318 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0x133/0x200 drivers/tty/pty.c:122 tty_put_char+0x137/0x160 drivers/tty/tty_io.c:3022 __process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0xc2c/0x2f30 drivers/tty/n_tty.c:1740 n_tty_receive_buf2+0x34/0x40 drivers/tty/n_tty.c:1775 tty_ldisc_receive_buf+0xaf/0x1c0 drivers/tty/tty_buffer.c:461 tty_port_default_receive_buf+0x114/0x190 drivers/tty/tty_port.c:38 receive_buf drivers/tty/tty_buffer.c:481 [inline] flush_to_ldisc+0x3b2/0x590 drivers/tty/tty_buffer.c:533 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:247 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 -> #2 (&(&port->lock)->rlock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 tty_port_tty_get+0x22/0x80 drivers/tty/tty_port.c:287 tty_port_default_wakeup+0x16/0x40 drivers/tty/tty_port.c:47 tty_port_tty_wakeup+0x5d/0x70 drivers/tty/tty_port.c:387 uart_write_wakeup+0x46/0x70 drivers/tty/serial/serial_core.c:103 serial8250_tx_chars+0x4a4/0xb20 drivers/tty/serial/8250/8250_port.c:1806 serial8250_handle_irq.part.0+0x1be/0x2e0 drivers/tty/serial/8250/8250_port.c:1879 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1865 [inline] serial8250_default_handle_irq+0xc5/0x150 drivers/tty/serial/8250/8250_port.c:1895 serial8250_interrupt+0xfb/0x1a0 drivers/tty/serial/8250/8250_core.c:125 __handle_irq_event_percpu+0x1c6/0xb10 kernel/irq/handle.c:149 handle_irq_event_percpu+0xa0/0x1d0 kernel/irq/handle.c:189 handle_irq_event+0xa7/0x134 kernel/irq/handle.c:206 handle_edge_irq+0x232/0x8a0 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:154 [inline] handle_irq+0x252/0x3d8 arch/x86/kernel/irq_64.c:78 do_IRQ+0x99/0x1d0 arch/x86/kernel/irq.c:246 ret_from_intr+0x0/0x1e native_safe_halt+0x2/0x10 arch/x86/include/asm/irqflags.h:57 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:555 default_idle_call+0x36/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x386/0x5d0 kernel/sched/idle.c:262 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:353 start_secondary+0x435/0x620 arch/x86/kernel/smpboot.c:272 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #1 (&port_lock_key){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 serial8250_console_write+0x253/0xab0 drivers/tty/serial/8250/8250_port.c:3245 univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:586 call_console_drivers kernel/printk/printk.c:1784 [inline] console_unlock+0xc9a/0x1040 kernel/printk/printk.c:2455 vprintk_emit+0x370/0x960 kernel/printk/printk.c:1978 vprintk_default+0x28/0x30 kernel/printk/printk.c:2005 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:2038 register_console+0x74d/0xb50 kernel/printk/printk.c:2770 univ8250_console_init+0x3e/0x4b drivers/tty/serial/8250/8250_core.c:681 console_init+0x6b7/0x9fe kernel/printk/printk.c:2856 start_kernel+0x5df/0x8bd init/main.c:667 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #0 (console_owner){-.-.}: lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3860 console_lock_spinning_enable kernel/printk/printk.c:1647 [inline] console_unlock+0x516/0x1040 kernel/printk/printk.c:2452 vprintk_emit+0x370/0x960 kernel/printk/printk.c:1978 vprintk_default+0x28/0x30 kernel/printk/printk.c:2005 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:2038 report_bug.cold+0x11/0x5e lib/bug.c:191 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 __ClearPageBuddy include/linux/page-flags.h:706 [inline] rmv_page_order mm/page_alloc.c:744 [inline] rmv_page_order mm/page_alloc.c:742 [inline] __isolate_free_page+0x4a8/0x680 mm/page_alloc.c:3134 fast_isolate_freepages mm/compaction.c:1356 [inline] isolate_freepages mm/compaction.c:1429 [inline] compaction_alloc+0xd05/0x2970 mm/compaction.c:1541 unmap_and_move mm/migrate.c:1177 [inline] migrate_pages+0x48e/0x2cc0 mm/migrate.c:1417 compact_zone+0x2207/0x3e90 mm/compaction.c:2173 kcompactd_do_work+0x6de/0x1200 mm/compaction.c:2564 kcompactd+0x251/0x970 mm/compaction.c:2657 kthread+0x357/0x430 kernel/kthread.c:247 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 other info that might help us debug this: Chain exists of: console_owner --> &(&port->lock)->rlock --> &(&zone->lock)->rlock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&(&zone->lock)->rlock); lock(&(&port->lock)->rlock); lock(&(&zone->lock)->rlock); lock(console_owner); *** DEADLOCK *** 2 locks held by kcompactd0/1043: #0: 00000000c8e67de2 (&(&zone->lock)->rlock){..-.}, at: fast_isolate_freepages mm/compaction.c:1313 [inline] #0: 00000000c8e67de2 (&(&zone->lock)->rlock){..-.}, at: isolate_freepages mm/compaction.c:1429 [inline] #0: 00000000c8e67de2 (&(&zone->lock)->rlock){..-.}, at: compaction_alloc+0x6f3/0x2970 mm/compaction.c:1541 #1: 0000000001912981 (console_lock){+.+.}, at: console_trylock_spinning kernel/printk/printk.c:1709 [inline] #1: 0000000001912981 (console_lock){+.+.}, at: vprintk_emit+0x351/0x960 kernel/printk/printk.c:1977 stack backtrace: CPU: 0 PID: 1043 Comm: kcompactd0 Not tainted 5.0.0-rc1-next-20190111 #10 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+0x1db/0x2d0 lib/dump_stack.c:113 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1225 check_prev_add kernel/locking/lockdep.c:1867 [inline] check_prevs_add kernel/locking/lockdep.c:1980 [inline] validate_chain kernel/locking/lockdep.c:2351 [inline] __lock_acquire+0x2fed/0x4a10 kernel/locking/lockdep.c:3339 lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3860 console_lock_spinning_enable kernel/printk/printk.c:1647 [inline] console_unlock+0x516/0x1040 kernel/printk/printk.c:2452 vprintk_emit+0x370/0x960 kernel/printk/printk.c:1978 vprintk_default+0x28/0x30 kernel/printk/printk.c:2005 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:2038 report_bug.cold+0x11/0x5e lib/bug.c:191 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:__isolate_free_page+0x4a8/0x680 mm/page_alloc.c:3112 Code: 4c 39 e3 77 c0 0f b6 8d 74 ff ff ff b8 01 00 00 00 48 d3 e0 e9 11 fd ff ff 48 c7 c6 a0 63 52 88 4c 89 e7 e8 6a 14 10 00 0f 0b <0f> 0b 48 c7 c6 c0 64 52 88 4c 89 e7 e8 57 14 10 00 0f 0b 48 89 cf RSP: 0000:ffff8880a78e6f58 EFLAGS: 00010007 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88812fffc7e0 RDX: 1ffff11025fff8fc RSI: 0000000000000007 RDI: ffff88812fffc7b0 RBP: ffff8880a78e7018 R08: ffff8880a78ce000 R09: ffffed1014f1cdf2 R10: ffffed1014f1cdf1 R11: 0000000000000003 R12: ffff88812fffc7b0 R13: 1ffff11014f1cdf2 R14: ffff88812fffc7b0 R15: ffff8880a78e6ff0 fast_isolate_freepages mm/compaction.c:1356 [inline] isolate_freepages mm/compaction.c:1429 [inline] compaction_alloc+0xd05/0x2970 mm/compaction.c:1541 unmap_and_move mm/migrate.c:1177 [inline] migrate_pages+0x48e/0x2cc0 mm/migrate.c:1417 compact_zone+0x2207/0x3e90 mm/compaction.c:2173 Lost 33 message(s)! ---[ end trace b088aebfc4c7ea50 ]--- RIP: 0010:__isolate_free_page+0x4a8/0x680 mm/page_alloc.c:3112 Code: 4c 39 e3 77 c0 0f b6 8d 74 ff ff ff b8 01 00 00 00 48 d3 e0 e9 11 fd ff ff 48 c7 c6 a0 63 52 88 4c 89 e7 e8 6a 14 10 00 0f 0b <0f> 0b 48 c7 c6 c0 64 52 88 4c 89 e7 e8 57 14 10 00 0f 0b 48 89 cf RSP: 0000:ffff8880a78e6f58 EFLAGS: 00010007 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88812fffc7e0 RDX: 1ffff11025fff8fc RSI: 0000000000000007 RDI: ffff88812fffc7b0 RBP: ffff8880a78e7018 R08: ffff8880a78ce000 R09: ffffed1014f1cdf2 R10: ffffed1014f1cdf1 R11: 0000000000000003 R12: ffff88812fffc7b0 R13: 1ffff11014f1cdf2 R14: ffff88812fffc7b0 R15: ffff8880a78e6ff0 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000438ca0 CR3: 0000000009871000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 --- 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. 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[209.85.220.69]) by mx.google.com with SMTPS id r204sor257914ita.16.2019.01.16.18.33.04 for (Google Transport Security); Wed, 16 Jan 2019 18:33:04 -0800 (PST) Received-SPF: pass (google.com: domain of 3yok_xakbabsjpqb1cc5i1gg94.7ff7c5lj5i3fek5ek.3fd@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) client-ip=209.85.220.69; Authentication-Results: mx.google.com; spf=pass (google.com: domain of 3yok_xakbabsjpqb1cc5i1gg94.7ff7c5lj5i3fek5ek.3fd@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) smtp.mailfrom=3YOk_XAkbABsJPQB1CC5I1GG94.7FF7C5LJ5I3FEK5EK.3FD@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com X-Google-Smtp-Source: ALg8bN5tWPIN5Ij97PgrCHPn1K9wE+E79IZpMo8sUy2bwOR+AUoGY+nqfxeufwpDK36oFy4ZWvxbsooOzeOGmWZ70c2gV7j+byyV MIME-Version: 1.0 X-Received: by 2002:a24:2c43:: with SMTP id i64mr7703276iti.2.1547692384563; Wed, 16 Jan 2019 18:33:04 -0800 (PST) Date: Wed, 16 Jan 2019 18:33:04 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000cdc61b057f9e360e@google.com> Subject: kernel BUG at mm/page_alloc.c:LINE! From: syzbot To: akpm@linux-foundation.org, iamjoonsoo.kim@lge.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mgorman@techsingularity.net, mhocko@suse.com, sfr@canb.auug.org.au, syzkaller-bugs@googlegroups.com, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8"; delsp="yes"; format="flowed" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Message-ID: <20190117023304.qwqETC4fU6qbvjt5fBas-i5OoQpzPKzYmPDyeCEHlL4@z> Hello, syzbot found the following crash on: HEAD commit: b808822a75a3 Add linux-next specific files for 20190111 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=16a471d8c00000 kernel config: https://syzkaller.appspot.com/x/.config?x=c052ead0aed5001b dashboard link: https://syzkaller.appspot.com/bug?extid=80dd4798c16c634daf15 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+80dd4798c16c634daf15@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at mm/page_alloc.c:3112! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 1043 Comm: kcompactd0 Not tainted 5.0.0-rc1-next-20190111 #10 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__isolate_free_page+0x4a8/0x680 mm/page_alloc.c:3112 Code: 4c 39 e3 77 c0 0f b6 8d 74 ff ff ff b8 01 00 00 00 48 d3 e0 e9 11 fd ff ff 48 c7 c6 a0 63 52 88 4c 89 e7 e8 6a 14 10 00 0f 0b <0f> 0b 48 c7 c6 c0 64 52 88 4c 89 e7 e8 57 14 10 00 0f 0b 48 89 cf RSP: 0000:ffff8880a78e6f58 EFLAGS: 00010007 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88812fffc7e0 RDX: 1ffff11025fff8fc RSI: 0000000000000007 RDI: ffff88812fffc7b0 RBP: ffff8880a78e7018 R08: ffff8880a78ce000 R09: ffffed1014f1cdf2 R10: ffffed1014f1cdf1 R11: 0000000000000003 R12: ffff88812fffc7b0 R13: 1ffff11014f1cdf2 R14: ffff88812fffc7b0 R15: ffff8880a78e6ff0 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000438ca0 CR3: 0000000009871000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: fast_isolate_freepages mm/compaction.c:1356 [inline] isolate_freepages mm/compaction.c:1429 [inline] compaction_alloc+0xd05/0x2970 mm/compaction.c:1541 unmap_and_move mm/migrate.c:1177 [inline] migrate_pages+0x48e/0x2cc0 mm/migrate.c:1417 compact_zone+0x2207/0x3e90 mm/compaction.c:2173 kcompactd_do_work+0x6de/0x1200 mm/compaction.c:2564 kcompactd+0x251/0x970 mm/compaction.c:2657 kthread+0x357/0x430 kernel/kthread.c:247 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: ====================================================== WARNING: possible circular locking dependency detected 5.0.0-rc1-next-20190111 #10 Not tainted ------------------------------------------------------ kcompactd0/1043 is trying to acquire lock: 00000000a0848583 (console_owner){-.-.}, at: log_next kernel/printk/printk.c:499 [inline] 00000000a0848583 (console_owner){-.-.}, at: console_unlock+0x4ac/0x1040 kernel/printk/printk.c:2442 but task is already holding lock: 00000000c8e67de2 (&(&zone->lock)->rlock){..-.}, at: fast_isolate_freepages mm/compaction.c:1313 [inline] 00000000c8e67de2 (&(&zone->lock)->rlock){..-.}, at: isolate_freepages mm/compaction.c:1429 [inline] 00000000c8e67de2 (&(&zone->lock)->rlock){..-.}, at: compaction_alloc+0x6f3/0x2970 mm/compaction.c:1541 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&(&zone->lock)->rlock){..-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 rmqueue mm/page_alloc.c:3253 [inline] get_page_from_freelist+0xf6c/0x4870 mm/page_alloc.c:3668 __alloc_pages_nodemask+0x4fd/0xdc0 mm/page_alloc.c:4714 alloc_pages_current+0x107/0x210 mm/mempolicy.c:2106 alloc_pages include/linux/gfp.h:509 [inline] depot_save_stack+0x3da/0x460 lib/stackdepot.c:260 save_stack+0xa9/0xd0 mm/kasan/common.c:79 set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc mm/kasan/common.c:496 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:469 kasan_kmalloc mm/kasan/common.c:504 [inline] kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:411 slab_post_alloc_hook mm/slab.h:440 [inline] slab_alloc mm/slab.c:3381 [inline] __do_kmalloc mm/slab.c:3709 [inline] __kmalloc+0x145/0x740 mm/slab.c:3720 kmalloc include/linux/slab.h:550 [inline] tty_buffer_alloc drivers/tty/tty_buffer.c:175 [inline] __tty_buffer_request_room+0x2bf/0x7e0 drivers/tty/tty_buffer.c:273 tty_insert_flip_string_fixed_flag+0x93/0x1f0 drivers/tty/tty_buffer.c:318 tty_insert_flip_string include/linux/tty_flip.h:37 [inline] pty_write+0x133/0x200 drivers/tty/pty.c:122 tty_put_char+0x137/0x160 drivers/tty/tty_io.c:3022 __process_echoes+0x5c8/0xa40 drivers/tty/n_tty.c:726 flush_echoes drivers/tty/n_tty.c:827 [inline] __receive_buf drivers/tty/n_tty.c:1646 [inline] n_tty_receive_buf_common+0xc2c/0x2f30 drivers/tty/n_tty.c:1740 n_tty_receive_buf2+0x34/0x40 drivers/tty/n_tty.c:1775 tty_ldisc_receive_buf+0xaf/0x1c0 drivers/tty/tty_buffer.c:461 tty_port_default_receive_buf+0x114/0x190 drivers/tty/tty_port.c:38 receive_buf drivers/tty/tty_buffer.c:481 [inline] flush_to_ldisc+0x3b2/0x590 drivers/tty/tty_buffer.c:533 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:247 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 -> #2 (&(&port->lock)->rlock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 tty_port_tty_get+0x22/0x80 drivers/tty/tty_port.c:287 tty_port_default_wakeup+0x16/0x40 drivers/tty/tty_port.c:47 tty_port_tty_wakeup+0x5d/0x70 drivers/tty/tty_port.c:387 uart_write_wakeup+0x46/0x70 drivers/tty/serial/serial_core.c:103 serial8250_tx_chars+0x4a4/0xb20 drivers/tty/serial/8250/8250_port.c:1806 serial8250_handle_irq.part.0+0x1be/0x2e0 drivers/tty/serial/8250/8250_port.c:1879 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1865 [inline] serial8250_default_handle_irq+0xc5/0x150 drivers/tty/serial/8250/8250_port.c:1895 serial8250_interrupt+0xfb/0x1a0 drivers/tty/serial/8250/8250_core.c:125 __handle_irq_event_percpu+0x1c6/0xb10 kernel/irq/handle.c:149 handle_irq_event_percpu+0xa0/0x1d0 kernel/irq/handle.c:189 handle_irq_event+0xa7/0x134 kernel/irq/handle.c:206 handle_edge_irq+0x232/0x8a0 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:154 [inline] handle_irq+0x252/0x3d8 arch/x86/kernel/irq_64.c:78 do_IRQ+0x99/0x1d0 arch/x86/kernel/irq.c:246 ret_from_intr+0x0/0x1e native_safe_halt+0x2/0x10 arch/x86/include/asm/irqflags.h:57 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:555 default_idle_call+0x36/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x386/0x5d0 kernel/sched/idle.c:262 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:353 start_secondary+0x435/0x620 arch/x86/kernel/smpboot.c:272 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #1 (&port_lock_key){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:152 serial8250_console_write+0x253/0xab0 drivers/tty/serial/8250/8250_port.c:3245 univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:586 call_console_drivers kernel/printk/printk.c:1784 [inline] console_unlock+0xc9a/0x1040 kernel/printk/printk.c:2455 vprintk_emit+0x370/0x960 kernel/printk/printk.c:1978 vprintk_default+0x28/0x30 kernel/printk/printk.c:2005 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:2038 register_console+0x74d/0xb50 kernel/printk/printk.c:2770 univ8250_console_init+0x3e/0x4b drivers/tty/serial/8250/8250_core.c:681 console_init+0x6b7/0x9fe kernel/printk/printk.c:2856 start_kernel+0x5df/0x8bd init/main.c:667 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 -> #0 (console_owner){-.-.}: lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3860 console_lock_spinning_enable kernel/printk/printk.c:1647 [inline] console_unlock+0x516/0x1040 kernel/printk/printk.c:2452 vprintk_emit+0x370/0x960 kernel/printk/printk.c:1978 vprintk_default+0x28/0x30 kernel/printk/printk.c:2005 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:2038 report_bug.cold+0x11/0x5e lib/bug.c:191 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 __ClearPageBuddy include/linux/page-flags.h:706 [inline] rmv_page_order mm/page_alloc.c:744 [inline] rmv_page_order mm/page_alloc.c:742 [inline] __isolate_free_page+0x4a8/0x680 mm/page_alloc.c:3134 fast_isolate_freepages mm/compaction.c:1356 [inline] isolate_freepages mm/compaction.c:1429 [inline] compaction_alloc+0xd05/0x2970 mm/compaction.c:1541 unmap_and_move mm/migrate.c:1177 [inline] migrate_pages+0x48e/0x2cc0 mm/migrate.c:1417 compact_zone+0x2207/0x3e90 mm/compaction.c:2173 kcompactd_do_work+0x6de/0x1200 mm/compaction.c:2564 kcompactd+0x251/0x970 mm/compaction.c:2657 kthread+0x357/0x430 kernel/kthread.c:247 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 other info that might help us debug this: Chain exists of: console_owner --> &(&port->lock)->rlock --> &(&zone->lock)->rlock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&(&zone->lock)->rlock); lock(&(&port->lock)->rlock); lock(&(&zone->lock)->rlock); lock(console_owner); *** DEADLOCK *** 2 locks held by kcompactd0/1043: #0: 00000000c8e67de2 (&(&zone->lock)->rlock){..-.}, at: fast_isolate_freepages mm/compaction.c:1313 [inline] #0: 00000000c8e67de2 (&(&zone->lock)->rlock){..-.}, at: isolate_freepages mm/compaction.c:1429 [inline] #0: 00000000c8e67de2 (&(&zone->lock)->rlock){..-.}, at: compaction_alloc+0x6f3/0x2970 mm/compaction.c:1541 #1: 0000000001912981 (console_lock){+.+.}, at: console_trylock_spinning kernel/printk/printk.c:1709 [inline] #1: 0000000001912981 (console_lock){+.+.}, at: vprintk_emit+0x351/0x960 kernel/printk/printk.c:1977 stack backtrace: CPU: 0 PID: 1043 Comm: kcompactd0 Not tainted 5.0.0-rc1-next-20190111 #10 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+0x1db/0x2d0 lib/dump_stack.c:113 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1225 check_prev_add kernel/locking/lockdep.c:1867 [inline] check_prevs_add kernel/locking/lockdep.c:1980 [inline] validate_chain kernel/locking/lockdep.c:2351 [inline] __lock_acquire+0x2fed/0x4a10 kernel/locking/lockdep.c:3339 lock_acquire+0x1db/0x570 kernel/locking/lockdep.c:3860 console_lock_spinning_enable kernel/printk/printk.c:1647 [inline] console_unlock+0x516/0x1040 kernel/printk/printk.c:2452 vprintk_emit+0x370/0x960 kernel/printk/printk.c:1978 vprintk_default+0x28/0x30 kernel/printk/printk.c:2005 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398 printk+0xba/0xed kernel/printk/printk.c:2038 report_bug.cold+0x11/0x5e lib/bug.c:191 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:__isolate_free_page+0x4a8/0x680 mm/page_alloc.c:3112 Code: 4c 39 e3 77 c0 0f b6 8d 74 ff ff ff b8 01 00 00 00 48 d3 e0 e9 11 fd ff ff 48 c7 c6 a0 63 52 88 4c 89 e7 e8 6a 14 10 00 0f 0b <0f> 0b 48 c7 c6 c0 64 52 88 4c 89 e7 e8 57 14 10 00 0f 0b 48 89 cf RSP: 0000:ffff8880a78e6f58 EFLAGS: 00010007 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88812fffc7e0 RDX: 1ffff11025fff8fc RSI: 0000000000000007 RDI: ffff88812fffc7b0 RBP: ffff8880a78e7018 R08: ffff8880a78ce000 R09: ffffed1014f1cdf2 R10: ffffed1014f1cdf1 R11: 0000000000000003 R12: ffff88812fffc7b0 R13: 1ffff11014f1cdf2 R14: ffff88812fffc7b0 R15: ffff8880a78e6ff0 fast_isolate_freepages mm/compaction.c:1356 [inline] isolate_freepages mm/compaction.c:1429 [inline] compaction_alloc+0xd05/0x2970 mm/compaction.c:1541 unmap_and_move mm/migrate.c:1177 [inline] migrate_pages+0x48e/0x2cc0 mm/migrate.c:1417 compact_zone+0x2207/0x3e90 mm/compaction.c:2173 Lost 33 message(s)! ---[ end trace b088aebfc4c7ea50 ]--- RIP: 0010:__isolate_free_page+0x4a8/0x680 mm/page_alloc.c:3112 Code: 4c 39 e3 77 c0 0f b6 8d 74 ff ff ff b8 01 00 00 00 48 d3 e0 e9 11 fd ff ff 48 c7 c6 a0 63 52 88 4c 89 e7 e8 6a 14 10 00 0f 0b <0f> 0b 48 c7 c6 c0 64 52 88 4c 89 e7 e8 57 14 10 00 0f 0b 48 89 cf RSP: 0000:ffff8880a78e6f58 EFLAGS: 00010007 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88812fffc7e0 RDX: 1ffff11025fff8fc RSI: 0000000000000007 RDI: ffff88812fffc7b0 RBP: ffff8880a78e7018 R08: ffff8880a78ce000 R09: ffffed1014f1cdf2 R10: ffffed1014f1cdf1 R11: 0000000000000003 R12: ffff88812fffc7b0 R13: 1ffff11014f1cdf2 R14: ffff88812fffc7b0 R15: ffff8880a78e6ff0 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000438ca0 CR3: 0000000009871000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 --- This bug is generated by a bot. 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