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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76F17E95A67 for ; Sun, 8 Oct 2023 12:04:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344736AbjJHL64 (ORCPT ); Sun, 8 Oct 2023 07:58:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43700 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230303AbjJHL6z (ORCPT ); Sun, 8 Oct 2023 07:58:55 -0400 Received: from mail-oi1-f208.google.com (mail-oi1-f208.google.com [209.85.167.208]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E2BACB6 for ; Sun, 8 Oct 2023 04:58:53 -0700 (PDT) Received: by mail-oi1-f208.google.com with SMTP id 5614622812f47-3af5b5d7ecbso6142403b6e.3 for ; Sun, 08 Oct 2023 04:58:53 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1696766333; x=1697371133; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=8RprEX1ixu6u5Jx+NExPvlRafwbMpRzy1zYFg1qW8o0=; b=M4zcquubWBJvAJkAhBSNMwD6kXSIgL6M7wH+4mzD0IQ8VJaVyhqMFbkTzSFwY9EBnK sN0VnITkuvnxTq9YWmNUBCPPj62oNkwnCGvaKKnur4NZvEH9hcZSiWTyLEs6x+yQ3J4l kJjp365Rd11RY9kjk1/v8oxjMmyGsJX+J6KBMO9h4Eoxw02xpO3hkedmUDYdX/YHUhTn vCJE5ZxpGKF0dsbAZiphxLp30JjIoMQIWD0an3GSezXdc8IHPp0nbjMxW65HNoVEgfrT nnO3YEZN7Fd4IQSQ3kFRHVbFD4yE1Gh12LN00YA5RLLWSCc4vKqqdDCoxlH72bZgR4vZ uKYw== X-Gm-Message-State: AOJu0Yyf0dBDw965IyqAYANtAn1SM85iPOopNvt1hnlYB6VGJMg8HiU2 UDzLSNkE7tbnC7avp2srYlL6e0esP5gVJP5ZM4sTQMzO75YLFYAqvA== X-Google-Smtp-Source: AGHT+IH379ZAYxcqiTdBOpbrbHPA6BP8Vf6jUy0A+2nCyZZDxNbC/J+qMTtUCkXngh9H6UVo6gO6MOLBA9LTZrhpQ66NJLMyLg1a MIME-Version: 1.0 X-Received: by 2002:a05:6808:f05:b0:3a7:5f99:9fe1 with SMTP id m5-20020a0568080f0500b003a75f999fe1mr7018210oiw.2.1696766333135; Sun, 08 Oct 2023 04:58:53 -0700 (PDT) Date: Sun, 08 Oct 2023 04:58:53 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008db61e0607333294@google.com> Subject: [syzbot] [kernel?] possible deadlock in try_to_wake_up (3) From: syzbot To: linux-kernel@vger.kernel.org, luto@kernel.org, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 7d730f1bf6f3 Add linux-next specific files for 20231005 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15f02fa1680000 kernel config: https://syzkaller.appspot.com/x/.config?x=f532286be4fff4b5 dashboard link: https://syzkaller.appspot.com/bug?extid=6b8ea5bb987ec6fe0fd1 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/1d7f28a4398f/disk-7d730f1b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d454d124268e/vmlinux-7d730f1b.xz kernel image: https://storage.googleapis.com/syzbot-assets/dbca966175cb/bzImage-7d730f1b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6b8ea5bb987ec6fe0fd1@syzkaller.appspotmail.com batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 ====================================================== WARNING: possible circular locking dependency detected 6.6.0-rc4-next-20231005-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/5091 is trying to acquire lock: ffff88801d41e338 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:518 [inline] ffff88801d41e338 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x15d0 kernel/sched/core.c:4213 but task is already holding lock: ffffffff8cb98e18 ((console_sem).lock){-...}-{2:2}, at: up+0x16/0xb0 kernel/locking/semaphore.c:187 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 ((console_sem).lock){-...}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 down_trylock+0x12/0x70 kernel/locking/semaphore.c:139 __down_trylock_console_sem+0x40/0x140 kernel/printk/printk.c:323 console_trylock+0x73/0x130 kernel/printk/printk.c:2652 console_trylock_spinning kernel/printk/printk.c:1924 [inline] vprintk_emit+0x162/0x5f0 kernel/printk/printk.c:2303 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45 _printk+0xc8/0x100 kernel/printk/printk.c:2329 pick_eevdf kernel/sched/fair.c:963 [inline] pick_next_entity kernel/sched/fair.c:5247 [inline] pick_next_task_fair+0x1c5/0x1280 kernel/sched/fair.c:8205 __pick_next_task kernel/sched/core.c:5986 [inline] pick_next_task kernel/sched/core.c:6061 [inline] __schedule+0x493/0x5a00 kernel/sched/core.c:6640 preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:6998 irqentry_exit+0x35/0x80 kernel/entry/common.c:432 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 kernel_text_address+0x0/0xf0 kernel/extable.c:71 __kernel_text_address+0xd/0x30 kernel/extable.c:79 unwind_get_return_address+0x78/0xe0 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xbe/0x170 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122 save_stack+0x160/0x1f0 mm/page_owner.c:128 __reset_page_owner+0x5a/0x190 mm/page_owner.c:149 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1134 [inline] free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2383 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2518 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x18e/0x1d0 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook mm/slab.h:758 [inline] slab_alloc_node mm/slub.c:3478 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc+0x15d/0x380 mm/slub.c:3502 kmem_cache_zalloc include/linux/slab.h:711 [inline] alloc_empty_file+0x73/0x1d0 fs/file_table.c:223 path_openat+0xdd/0x2ce0 fs/namei.c:3763 do_filp_open+0x1de/0x430 fs/namei.c:3807 do_sys_openat2+0x176/0x1e0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&rq->__lock){-.-.}-{2:2}: _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558 raw_spin_rq_lock kernel/sched/sched.h:1357 [inline] rq_lock kernel/sched/sched.h:1671 [inline] task_fork_fair+0x70/0x240 kernel/sched/fair.c:12399 sched_cgroup_fork+0x3cf/0x510 kernel/sched/core.c:4799 copy_process+0x4580/0x74b0 kernel/fork.c:2609 kernel_clone+0xfd/0x920 kernel/fork.c:2907 user_mode_thread+0xb4/0xf0 kernel/fork.c:2985 rest_init+0x27/0x2b0 init/main.c:691 arch_call_rest_init+0x13/0x30 init/main.c:823 start_kernel+0x39f/0x480 init/main.c:1068 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:556 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:537 secondary_startup_64_no_verify+0x166/0x16b -> #0 (&p->pi_lock){-.-.}-{2:2}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:518 [inline] try_to_wake_up+0xb0/0x15d0 kernel/sched/core.c:4213 up+0x79/0xb0 kernel/locking/semaphore.c:191 __up_console_sem kernel/printk/printk.c:340 [inline] __console_unlock kernel/printk/printk.c:2699 [inline] console_unlock+0x1cf/0x260 kernel/printk/printk.c:3031 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2304 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45 _printk+0xc8/0x100 kernel/printk/printk.c:2329 batadv_check_known_mac_addr+0x21f/0x440 net/batman-adv/hard-interface.c:526 batadv_hard_if_event+0x1048/0x1660 net/batman-adv/hard-interface.c:998 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xb9/0x130 net/core/dev.c:1970 call_netdevice_notifiers_extack net/core/dev.c:2008 [inline] call_netdevice_notifiers net/core/dev.c:2022 [inline] dev_set_mac_address+0x36f/0x4a0 net/core/dev.c:8860 dev_set_mac_address_user+0x30/0x50 net/core/dev.c:8874 do_setlink+0x6e9/0x3fa0 net/core/rtnetlink.c:2864 __rtnl_newlink+0xc1d/0x1940 net/core/rtnetlink.c:3707 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3754 rtnetlink_rcv_msg+0x3c4/0xdf0 net/core/rtnetlink.c:6480 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x536/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 __sys_sendto+0x255/0x340 net/socket.c:2194 __do_sys_sendto net/socket.c:2206 [inline] __se_sys_sendto net/socket.c:2202 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2202 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: &p->pi_lock --> &rq->__lock --> (console_sem).lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock((console_sem).lock); lock(&rq->__lock); lock((console_sem).lock); lock(&p->pi_lock); *** DEADLOCK *** 4 locks held by syz-executor.5/5091: #0: ffffffff8e60db28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8e60db28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x36f/0xdf0 net/core/rtnetlink.c:6477 #1: ffffffff8e6001b0 (dev_addr_sem){++++}-{3:3}, at: dev_set_mac_address_user+0x22/0x50 net/core/dev.c:8873 #2: ffffffff8cbab220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] #2: ffffffff8cbab220 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline] #2: ffffffff8cbab220 (rcu_read_lock){....}-{1:2}, at: batadv_check_known_mac_addr+0x38/0x440 net/batman-adv/hard-interface.c:513 #3: ffffffff8cb98e18 ((console_sem).lock){-...}-{2:2}, at: up+0x16/0xb0 kernel/locking/semaphore.c:187 stack backtrace: CPU: 0 PID: 5091 Comm: syz-executor.5 Not tainted 6.6.0-rc4-next-20231005-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 check_noncircular+0x311/0x3f0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:518 [inline] try_to_wake_up+0xb0/0x15d0 kernel/sched/core.c:4213 up+0x79/0xb0 kernel/locking/semaphore.c:191 __up_console_sem kernel/printk/printk.c:340 [inline] __console_unlock kernel/printk/printk.c:2699 [inline] console_unlock+0x1cf/0x260 kernel/printk/printk.c:3031 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2304 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45 _printk+0xc8/0x100 kernel/printk/printk.c:2329 batadv_check_known_mac_addr+0x21f/0x440 net/batman-adv/hard-interface.c:526 batadv_hard_if_event+0x1048/0x1660 net/batman-adv/hard-interface.c:998 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93 call_netdevice_notifiers_info+0xb9/0x130 net/core/dev.c:1970 call_netdevice_notifiers_extack net/core/dev.c:2008 [inline] call_netdevice_notifiers net/core/dev.c:2022 [inline] dev_set_mac_address+0x36f/0x4a0 net/core/dev.c:8860 dev_set_mac_address_user+0x30/0x50 net/core/dev.c:8874 do_setlink+0x6e9/0x3fa0 net/core/rtnetlink.c:2864 __rtnl_newlink+0xc1d/0x1940 net/core/rtnetlink.c:3707 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3754 rtnetlink_rcv_msg+0x3c4/0xdf0 net/core/rtnetlink.c:6480 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x536/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 __sys_sendto+0x255/0x340 net/socket.c:2194 __do_sys_sendto net/socket.c:2206 [inline] __se_sys_sendto net/socket.c:2202 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2202 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f75f027e7dc Code: 1a 51 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 60 51 02 00 48 8b RSP: 002b:00007ffece75e400 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f75f0ec4620 RCX: 00007f75f027e7dc RDX: 000000000000002c RSI: 00007f75f0ec4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffece75e454 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001 R13: 0000000000000000 R14: 00007f75f0ec4670 R15: 0000000000000000 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: batadv0: Interface activated: batadv_slave_1 netdevsim netdevsim5 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim5 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim5 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim5 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 ieee80211 phy11: Selected rate control algorithm 'minstrel_ht' ieee80211 phy14: Selected rate control algorithm 'minstrel_ht' --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup