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[23.128.96.18]) by mx.google.com with ESMTP id f16si5609789ejx.333.2021.02.26.01.52.33; Fri, 26 Feb 2021 01:52:55 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230355AbhBZJt0 (ORCPT + 99 others); Fri, 26 Feb 2021 04:49:26 -0500 Received: from mail-il1-f200.google.com ([209.85.166.200]:56434 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230299AbhBZJtB (ORCPT ); Fri, 26 Feb 2021 04:49:01 -0500 Received: by mail-il1-f200.google.com with SMTP id s4so6552462ilv.23 for ; Fri, 26 Feb 2021 01:48:44 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=aZf9z6OB+FlDxun0umJzf89vugjyAE5GbM2mk1dS+6A=; b=DM+Ff6/ojatxPjZgJGFOB2A9kTo5ul+CxMXiVlTOfFakQ/hVFx4QC5r2nSnG7IukJp vZJ9p289Y67ql01p5PVOZpAp3S/3BJIjVCs7l97SOxt2vOIkEVoJlLSEmNKK/uA1/Xee x7TYcqUeKHk3oTKG9vIbimQqiQkG9FfmQDHz9U/wPTwNJFAqLXJuLZbrkah38d9GLgNg xwV1lB1E/XgB2sReLDV46DMpEKguvMBVCOvDsXOu7DfHj/8VcWXXG0bbrZLld/wptDci Z8FgsUOf0wJ6m8rrOH2/fMcql4xN/5TjM+8T0yPF6ATITBuHHCQdBOubfto2ThZ2ChZ6 vRPg== X-Gm-Message-State: AOAM533n1eNvcTaYJMs7vCLzgnyw5FBhcUHHyZbedZrauOazTS+EDAEy BSfwELNKjIYJqU1T5vkJp/JPL88ECR4q+M9VK+riwE5wytlD MIME-Version: 1.0 X-Received: by 2002:a02:74a:: with SMTP id f71mr2066296jaf.30.1614332899369; Fri, 26 Feb 2021 01:48:19 -0800 (PST) Date: Fri, 26 Feb 2021 01:48:19 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000000427db05bc3a2be3@google.com> Subject: KASAN: use-after-free Read in __cpuhp_state_remove_instance From: syzbot To: linux-kernel@vger.kernel.org, mpe@ellerman.id.au, paulmck@kernel.org, peterz@infradead.org, qais.yousef@arm.com, 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: d01f2f7e Add linux-next specific files for 20210226 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1750e9b0d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a1746d2802a82a05 dashboard link: https://syzkaller.appspot.com/bug?extid=38769495e847cea2dcca Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+38769495e847cea2dcca@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in __hlist_del include/linux/list.h:835 [inline] BUG: KASAN: use-after-free in hlist_del include/linux/list.h:852 [inline] BUG: KASAN: use-after-free in __cpuhp_state_remove_instance+0x58b/0x5b0 kernel/cpu.c:2002 Read of size 8 at addr ffff88801582fb98 by task syz-executor.5/15523 CPU: 1 PID: 15523 Comm: syz-executor.5 Not tainted 5.11.0-next-20210226-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xfa/0x151 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:232 __kasan_report mm/kasan/report.c:399 [inline] kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416 __hlist_del include/linux/list.h:835 [inline] hlist_del include/linux/list.h:852 [inline] __cpuhp_state_remove_instance+0x58b/0x5b0 kernel/cpu.c:2002 cpuhp_state_remove_instance_nocalls include/linux/cpuhotplug.h:407 [inline] io_wq_create+0x6ca/0xbf0 fs/io-wq.c:1056 io_init_wq_offload fs/io_uring.c:7792 [inline] io_uring_alloc_task_context+0x1bf/0x6a0 fs/io_uring.c:7811 io_uring_add_task_file+0x261/0x350 fs/io_uring.c:8773 io_uring_install_fd fs/io_uring.c:9381 [inline] io_uring_create fs/io_uring.c:9532 [inline] io_uring_setup+0x14c7/0x2be0 fs/io_uring.c:9571 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7ba953b108 EFLAGS: 00000202 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465ef9 RDX: 0000000020ffb000 RSI: 0000000020000080 RDI: 00000000000050bb RBP: 0000000020000080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000020ffb000 R14: 0000000020000000 R15: 0000000020ee7000 Allocated by task 15523: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:427 [inline] ____kasan_kmalloc mm/kasan/common.c:506 [inline] ____kasan_kmalloc mm/kasan/common.c:465 [inline] __kasan_kmalloc+0x99/0xc0 mm/kasan/common.c:515 kmalloc include/linux/slab.h:554 [inline] kzalloc include/linux/slab.h:684 [inline] io_wq_create+0xc0/0xbf0 fs/io-wq.c:1002 io_init_wq_offload fs/io_uring.c:7792 [inline] io_uring_alloc_task_context+0x1bf/0x6a0 fs/io_uring.c:7811 io_uring_add_task_file+0x261/0x350 fs/io_uring.c:8773 io_uring_install_fd fs/io_uring.c:9381 [inline] io_uring_create fs/io_uring.c:9532 [inline] io_uring_setup+0x14c7/0x2be0 fs/io_uring.c:9571 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 15523: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357 ____kasan_slab_free mm/kasan/common.c:360 [inline] ____kasan_slab_free mm/kasan/common.c:325 [inline] __kasan_slab_free+0xf5/0x130 mm/kasan/common.c:367 kasan_slab_free include/linux/kasan.h:199 [inline] slab_free_hook mm/slub.c:1562 [inline] slab_free_freelist_hook+0x72/0x1b0 mm/slub.c:1600 slab_free mm/slub.c:3161 [inline] kfree+0xe5/0x7b0 mm/slub.c:4213 io_wq_destroy fs/io-wq.c:1091 [inline] io_wq_put+0x4d0/0x6d0 fs/io-wq.c:1098 io_wq_create+0x92d/0xbf0 fs/io-wq.c:1053 io_init_wq_offload fs/io_uring.c:7792 [inline] io_uring_alloc_task_context+0x1bf/0x6a0 fs/io_uring.c:7811 io_uring_add_task_file+0x261/0x350 fs/io_uring.c:8773 io_uring_install_fd fs/io_uring.c:9381 [inline] io_uring_create fs/io_uring.c:9532 [inline] io_uring_setup+0x14c7/0x2be0 fs/io_uring.c:9571 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Last potentially related work creation: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:345 insert_work+0x48/0x370 kernel/workqueue.c:1331 __queue_work+0x5c1/0xf00 kernel/workqueue.c:1497 queue_work_on+0xae/0xc0 kernel/workqueue.c:1524 queue_work include/linux/workqueue.h:507 [inline] netdevice_queue_work drivers/infiniband/core/roce_gid_mgmt.c:658 [inline] netdevice_event+0x3aa/0x720 drivers/infiniband/core/roce_gid_mgmt.c:801 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2063 call_netdevice_notifiers_extack net/core/dev.c:2075 [inline] call_netdevice_notifiers net/core/dev.c:2089 [inline] unregister_netdevice_many+0x942/0x1760 net/core/dev.c:10905 default_device_exit_batch+0x2fa/0x3c0 net/core/dev.c:11425 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:178 cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:595 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Second to last potentially related work creation: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:345 insert_work+0x48/0x370 kernel/workqueue.c:1331 __queue_work+0x5c1/0xf00 kernel/workqueue.c:1497 queue_work_on+0xae/0xc0 kernel/workqueue.c:1524 queue_work include/linux/workqueue.h:507 [inline] call_usermodehelper_exec+0x1f0/0x4c0 kernel/umh.c:433 kobject_uevent_env+0xf9f/0x1680 lib/kobject_uevent.c:617 rx_queue_add_kobject net/core/net-sysfs.c:1020 [inline] net_rx_queue_update_kobjects+0xee/0x450 net/core/net-sysfs.c:1060 register_queue_kobjects net/core/net-sysfs.c:1742 [inline] netdev_register_kobject+0x275/0x430 net/core/net-sysfs.c:1990 register_netdevice+0xd33/0x14a0 net/core/dev.c:10178 __ip_tunnel_create+0x398/0x5c0 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x330/0x9c0 net/ipv4/ip_tunnel.c:1061 vti_init_net+0x2a/0x360 net/ipv4/ip_vti.c:501 ops_init+0xaf/0x470 net/core/net_namespace.c:140 setup_net+0x40f/0xa30 net/core/net_namespace.c:333 copy_net_ns+0x31e/0x760 net/core/net_namespace.c:474 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x385/0x440 kernel/nsproxy.c:178 copy_process+0x2ab5/0x6fd0 kernel/fork.c:2100 kernel_clone+0xe7/0xab0 kernel/fork.c:2462 __do_sys_clone+0xc8/0x110 kernel/fork.c:2579 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff88801582fb00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 152 bytes inside of 192-byte region [ffff88801582fb00, ffff88801582fbc0) The buggy address belongs to the page: page:000000007dcd9156 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1582f flags: 0xfff00000000200(slab) raw: 00fff00000000200 ffffea000071b7c0 0000000400000004 ffff888010841a00 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88801582fa80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88801582fb00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801582fb80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff88801582fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801582fc80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ================================================================== --- This report is generated by a bot. 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