From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 32E1D2080D3 for ; Tue, 10 Dec 2024 10:35:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733826905; cv=none; b=D648bxsStd7vev7n/oRlOUC1BZqRkmkDBSzLdu1O6/qwqXg4yusMlr2GTVKevDj9aM6sL9lNj45qpRQ/EJBzNrDDikJ78A5i6Pi131R9c2/4rXJenuS98P8fenVDsmdrNCUn/qu7OWzlOyiJnij38px1uOq4WwxIwe/xz3Ewlw8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733826905; c=relaxed/simple; bh=SZvLZb8LJ83CPH+p6l86Jqxrq52dX/h547WXFvcLcxs=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=pFXGXFrU2nVmXlwM06ijQYGvCeFn8g1jjd8pJ+f/VWBKchLEzYRqLxS9oP9glIFOzQZA717BjOsEm8Af7ot2Lq52rE8+2jNzVpNo5xQqmYOhkUg32xg028pQ5QkcUr75pxRIEo/Q4PZEv2f7HSlRbwtufDbgbOAkegfure/SAAc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f199.google.com with SMTP id e9e14a558f8ab-3a9d3149792so28563595ab.3 for ; Tue, 10 Dec 2024 02:35:02 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733826902; x=1734431702; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=VC+SMiTXtre78bS7Zdr5uFV1mKmHkgEI3uk0Wk9COkg=; b=k6+jDFVremGw4xInRJhTd9gmYCPT0xinxZiyFWLQDjaboLFmSNOZ4HbXVqvxC9YYVF nwhzs4nzWJ0bwE/rGXtnJa11TTVphi6tePSSob40e/SAwdbnlIVeKmI1KLUuO/JHEZzF irfEi18vQ095FXr2CmXeOHTKHYHMscioS1++Wd6nbfFgDTNBXf6jpLBJVFGWZN4uFljp bsQqXiQuM6LZ8FBn4pmX+QVx4lmtQ7DvQPd3dOVV42op94CTHWeoDNjxguHvw6Zf35II M0l4nqfpvAj0DB8nkSoTUCTarWIZcRlxM88l4zjzQuP56g6CVfF6GPfcgFreAL4Gz4Nk Ydbw== X-Forwarded-Encrypted: i=1; AJvYcCXcUUT3yjwgY8jJt60W8p0UdjuW2YvUGuk3O2Swgxf2a8GvU9W+2ubewm/tfXEvrRKiFBeR5OnSn/vnCtwY+igPjLYNSf8=@vger.kernel.org X-Gm-Message-State: AOJu0YxK6q6coLcyLsq1U/apMvLCORNiER2R99GzD2IkW23a2CPcV1vC V6Wb88JqXJbtQ25jGPHpmTB7HoyrTsStFc8u9kF3WgtecZwxaYQIo+NiWY9AD3d7wq5t0dAvpxL Xfl/WfEBtY3LwXf5KBoNrUPr3ddlAClTYoxu2NhTk9EJEnl/m4klZjW8= X-Google-Smtp-Source: AGHT+IH97RZpvW5HA6DibJBMkppYalSOHlksJy7dQMgihBd0Ajpp3m0E2QCQhknaa0Mvme2+EV22hlnMk4OqeJa7Szte6fcM5aAe Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1ca7:b0:3a7:776e:93fb with SMTP id e9e14a558f8ab-3a811d9c851mr172747695ab.8.1733826902234; Tue, 10 Dec 2024 02:35:02 -0800 (PST) Date: Tue, 10 Dec 2024 02:35:02 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67581956.050a0220.a30f1.01c8.GAE@google.com> Subject: Re: [syzbot] [integrity?] [lsm?] INFO: task hung in process_measurement (2) From: syzbot To: andy.wu@sony.com, bp@alien8.de, dave.hansen@linux.intel.com, dmitry.kasatkin@gmail.com, eric.snowberg@oracle.com, hpa@zytor.com, jmorris@namei.org, linkinjeon@kernel.org, linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, mingo@redhat.com, paul@paul-moore.com, roberto.sassu@huawei.com, serge@hallyn.com, sj1557.seo@samsung.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, wataru.aoyama@sony.com, x86@kernel.org, yuezhang.mo@sony.com, zohar@linux.ibm.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: INFO: task hung in process_measurement INFO: task syz.0.15:6594 blocked for more than 143 seconds. Not tainted 6.13.0-rc2-syzkaller-00018-g7cb1b4663150-dirty #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.15 state:D stack:25784 pid:6594 tgid:6585 ppid:6461 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x17fb/0x4be0 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905 rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578 inode_lock include/linux/fs.h:818 [inline] process_measurement+0x439/0x1fb0 security/integrity/ima/ima_main.c:250 ima_file_check+0xd9/0x120 security/integrity/ima/ima_main.c:572 security_file_post_open+0xb9/0x280 security/security.c:3121 do_open fs/namei.c:3830 [inline] path_openat+0x2ccd/0x3590 fs/namei.c:3987 do_filp_open+0x27f/0x4e0 fs/namei.c:4014 do_sys_openat2+0x13e/0x1d0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_open fs/open.c:1425 [inline] __se_sys_open fs/open.c:1421 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1421 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f928277fed9 RSP: 002b:00007f92834c6058 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f9282946080 RCX: 00007f928277fed9 RDX: 0000000000000008 RSI: 0000000000002000 RDI: 0000000020001b80 RBP: 00007f92827f3cc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f9282946080 R15: 00007ffee74328d8 Showing all locks held in the system: 3 locks held by kworker/u8:0/11: #0: ffff88801ac89148 ( (wq_completion)events_unbound){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3204 [inline] , at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90000107d00 ( (linkwatch_work).work ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3205 [inline] , at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8fc9f048 ( rtnl_mutex ){+.+.}-{4:4} , at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281 1 lock held by khungtaskd/30: #0: ffffffff8e937ae0 ( rcu_read_lock ){....}-{1:3} , at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] , at: rcu_read_lock include/linux/rcupdate.h:849 [inline] , at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744 5 locks held by kworker/u8:4/67: #0: ffff88801baeb148 ( (wq_completion)netns ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3204 [inline] , at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc9000216fd00 ( net_cleanup_work ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3205 [inline] , at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8fc92bd0 (pernet_ops_rwsem ){++++}-{4:4} , at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:586 #3: ffffffff8fc9f048 (rtnl_mutex){+.+.}-{4:4} , at: default_device_exit_batch+0xe9/0xaa0 net/core/dev.c:12059 #4: ffffffff8e93cff8 ( rcu_state.exp_mutex ){+.+.}-{4:4} , at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] , at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976 3 locks held by kworker/u8:6/2960: #0: ffff888031920948 ( (wq_completion)ipv6_addrconf ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3204 [inline] , at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc9000cb6fd00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8fc9f048 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4755 1 lock held by dhcpcd/5489: #0: ffffffff8fc9f048 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fc9f048 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline] #0: ffffffff8fc9f048 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xbb0/0x20e0 net/core/rtnetlink.c:4008 2 locks held by getty/5573: #0: ffff888031f740a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000330b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 5 locks held by syz.0.15/6586: 1 lock held by syz.0.15/6594: #0: ffff888060c982a0 (&sb->s_type->i_mutex_key#21){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #0: ffff888060c982a0 (&sb->s_type->i_mutex_key#21){++++}-{4:4}, at: process_measurement+0x439/0x1fb0 security/integrity/ima/ima_main.c:250 5 locks held by syz.1.16/6692: 1 lock held by syz.1.16/6693: #0: ffff888060c98f80 (&sb->s_type->i_mutex_key #21 ){++++}-{4:4} , at: inode_lock include/linux/fs.h:818 [inline] , at: process_measurement+0x439/0x1fb0 security/integrity/ima/ima_main.c:250 10 locks held by syz.2.17/6709: 1 lock held by syz.2.17/6710: #0: ffff888075bb0f80 (&sb->s_type->i_mutex_key #21 ){++++}-{4:4} , at: inode_lock include/linux/fs.h:818 [inline] , at: process_measurement+0x439/0x1fb0 security/integrity/ima/ima_main.c:250 2 locks held by syz-executor/6737: #0: ffffffff90187a68 ( &ops->srcu #2 ){.+.+}-{0:0} , at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] , at: rcu_read_lock include/linux/rcupdate.h:849 [inline] , at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:555 #1: ffffffff8fc9f048 ( rtnl_mutex){+.+.}-{4:4} , at: rtnl_lock net/core/rtnetlink.c:79 [inline] , at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline] , at: rtnl_newlink+0xbb0/0x20e0 net/core/rtnetlink.c:4008 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc2-syzkaller-00018-g7cb1b4663150-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline] watchdog+0xff6/0x1040 kernel/hung_task.c:397 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6709 Comm: syz.2.17 Not tainted 6.13.0-rc2-syzkaller-00018-g7cb1b4663150-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:409 Code: 90 35 57 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 d1 09 bb fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d c3 cc cc cc cc 89 e9 80 e1 07 38 c1 7c RSP: 0018:ffffc900032c6cd8 EFLAGS: 00000002 RAX: 1ffffffff34d7400 RBX: ffffffff9a6ba5e0 RCX: 0000000000000000 RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020 RBP: 0000000000000000 R08: ffffffff85482856 R09: 1ffff11004bed046 R10: dffffc0000000000 R11: ffffffff85482810 R12: dffffc0000000000 R13: ffffffff9a3b4f70 R14: 00000000000003fd R15: dffffc0000000000 FS: 00007ff0221986c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005576d5d24d98 CR3: 0000000034c90000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_in drivers/tty/serial/8250/8250.h:137 [inline] serial_lsr_in drivers/tty/serial/8250/8250.h:159 [inline] wait_for_lsr drivers/tty/serial/8250/8250_port.c:2087 [inline] serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3334 [inline] serial8250_console_write+0x1373/0x1ed0 drivers/tty/serial/8250/8250_port.c:3412 console_emit_next_record kernel/printk/printk.c:3122 [inline] console_flush_all+0x869/0xeb0 kernel/printk/printk.c:3210 __console_flush_and_unlock kernel/printk/printk.c:3269 [inline] console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3309 vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2432 _printk+0xd5/0x120 kernel/printk/printk.c:2457 __exfat_free_cluster+0x701/0xa00 fs/exfat/fatent.c:213 exfat_free_cluster+0x77/0xd0 fs/exfat/fatent.c:234 __exfat_truncate+0x745/0xa60 fs/exfat/file.c:235 exfat_truncate fs/exfat/file.c:257 [inline] exfat_setattr+0x10fa/0x1a90 fs/exfat/file.c:353 notify_change+0xbca/0xe90 fs/attr.c:552 do_truncate+0x220/0x310 fs/open.c:65 handle_truncate fs/namei.c:3449 [inline] do_open fs/namei.c:3832 [inline] path_openat+0x2e1e/0x3590 fs/namei.c:3987 do_filp_open+0x27f/0x4e0 fs/namei.c:4014 do_sys_openat2+0x13e/0x1d0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_creat fs/open.c:1495 [inline] __se_sys_creat fs/open.c:1489 [inline] __x64_sys_creat+0x123/0x170 fs/open.c:1489 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff02137fed9 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff022198058 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007ff021545fa0 RCX: 00007ff02137fed9 RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000020000000 RBP: 00007ff0213f3cc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff021545fa0 R15: 00007fffd20e6358 Tested on: commit: 7cb1b466 Merge tag 'locking_urgent_for_v6.13_rc3' of g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=145653e8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c7c9f223bfe8924e dashboard link: https://syzkaller.appspot.com/bug?extid=1de5a37cb85a2d536330 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=135868f8580000