From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) (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 05E981C683 for ; Thu, 17 Oct 2024 09:02:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729155751; cv=none; b=JGWBYQZ2OxOShfOs9bRWxP2mrMABXVigekTHpSQDXwicO7R9Q4cV9UysLC4MD7mckTcTfCFD4AJWEke3C9Rbk2Kkc5Z+5Wj9Zi2gvMVUvsD8xuV61rCbPA1BtUFa4u2gjd0Ta/KxJFNGTa/6AfXTnziyjLUJLS7MW9Hv+rIKTJU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729155751; c=relaxed/simple; bh=ynej3tE6z+IjENCF94V6jx4lK+8FjzJTIC7+eSa9f0c=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=NxnkstRl71u8/KJKtKeiamcZj21d1cpciNKYkQS7HiwIlRjlxUnrZ+rNJSS194v3f0qhEwHRVLZ8Lj29VvGf7RNeOUoIMyyqn4xKbWY3poEVxLxVPKnHRPJzPZnCYiLx+h/b61cxmPbvICu1QkoiS35hjEr2WsbUQMH73J2qFXY= 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=209.85.166.72 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-io1-f72.google.com with SMTP id ca18e2360f4ac-83aacb147c5so55368739f.2 for ; Thu, 17 Oct 2024 02:02:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729155746; x=1729760546; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=3IbfTcZfMfwFOXm3kudPuLyWNrjMVrqsU0eXvcHD06w=; b=BUeKKflDtoIQPuZ96ffFqbfRrvyHeNPp7NVonKx6r4FdYDIDTXDQGzofPayKK+kb7V OZcZc4vD35nr0zl9xSA8JIzAadD9+a25gEyMVIdxwg59CvixwMGoTgAQdUsHsPUIehh/ xTESpjXAk9IbYktbhDCQ+PdZFTkTI1RSEsEeHbADC7C0i9TpwgFAF1KUFMtTDKlbWk7a TyLLGmSkKcXR4xcRdRKHBnqV4X5ZrCAy3F3dPFUFtx/y1/Im2DLiuqPWYdyBf8ellrTG ffmZTtysrtpAJj7eutLWljhW6mMqhr9B+qh3Lw4lD/BdXEVVZ3BhHI0vrIPATkQV/5Nn gOag== X-Forwarded-Encrypted: i=1; AJvYcCVkDeNoKzbtMAx/2KzWhSATRkRF9d5y9zbuUXrTCr1ZC5e8DM/t9cgt6jK26SRD8NEbk2PK1x3PeXheJ/U=@vger.kernel.org X-Gm-Message-State: AOJu0YxxE+zlcHCq+5lzBDrHyTWjIeEaT540r6q8xIm/CDInOBguYBGt KknB3YbfC+/SA+9c5ll0K6Ni0pyFDOmnVluPZ8orYh5rl24PHSKJ8h54oo4Gin9bTL8Ol2G1t/g BkAU11T8ijtxr4YLHA/Nh7PLjotdWkqJt8KubGCtYTqYGWyZSmhaXpro= X-Google-Smtp-Source: AGHT+IGaSDKBWOBFP1lzOzdm2/8hj9mkiv5JAp0TIXLMkhriV6ilmz7uNRoJPfaTkLTOiyyylzISBSGoc0jupb3clBLpnyE1Y6n0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2167:b0:3a3:983a:874f with SMTP id e9e14a558f8ab-3a3bcdc6bfamr164993065ab.12.1729155746484; Thu, 17 Oct 2024 02:02:26 -0700 (PDT) Date: Thu, 17 Oct 2024 02:02:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6710d2a2.050a0220.d9b66.0189.GAE@google.com> Subject: [syzbot] [kernfs?] INFO: task hung in do_coredump (3) From: syzbot To: brauner@kernel.org, gregkh@linuxfoundation.org, jack@suse.cz, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tj@kernel.org, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: c964ced77262 Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13dbcf27980000 kernel config: https://syzkaller.appspot.com/x/.config?x=64667415a04ab9c4 dashboard link: https://syzkaller.appspot.com/bug?extid=a8cdfe2d8ad35db3a7fd 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/8e033b304e7a/disk-c964ced7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4f886da219e0/vmlinux-c964ced7.xz kernel image: https://storage.googleapis.com/syzbot-assets/814a8b44477f/bzImage-c964ced7.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a8cdfe2d8ad35db3a7fd@syzkaller.appspotmail.com INFO: task syz.0.801:10223 blocked for more than 143 seconds. Not tainted 6.12.0-rc3-syzkaller-00087-gc964ced77262 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.801 state:D stack:28592 pid:10223 tgid:10220 ppid:9895 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5322 [inline] __schedule+0xef5/0x5750 kernel/sched/core.c:6682 __schedule_loop kernel/sched/core.c:6759 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6774 schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2591 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264 coredump_wait fs/coredump.c:418 [inline] do_coredump+0x82f/0x4160 fs/coredump.c:575 get_signal+0x237c/0x26d0 kernel/signal.c:2902 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f282b37dff9 RSP: 002b:00007f282c1850e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f282b536060 RCX: 00007f282b37dff9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f282b536064 RBP: 00007f282b536058 R08: 00007f282c1a7080 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f282b536064 R13: 0000000000000000 R14: 00007ffcdfcd02c0 R15: 00007ffcdfcd03a8 Showing all locks held in the system: 3 locks held by kworker/u8:1/12: #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204 #1: ffffc90000117d80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205 #2: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276 1 lock held by khungtaskd/30: #0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720 5 locks held by kworker/u8:5/1104: #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204 #1: ffffc90003e27d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205 #2: ffffffff8faae510 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xb40 net/core/net_namespace.c:580 #3: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x8f/0x9b0 net/core/dev.c:11934 #4: ffffffff8ddc30f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297 3 locks held by kworker/u8:7/2921: #0: ffff88814c578948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204 #1: ffffc90009917d80 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205 #2: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xcf/0x14d0 net/ipv6/addrconf.c:4196 2 locks held by dhcpcd/4901: #0: ffff88803129c6c8 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: __netlink_dump_start+0x154/0x980 net/netlink/af_netlink.c:2405 #1: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_dumpit+0x18f/0x1f0 net/core/rtnetlink.c:6534 2 locks held by getty/4989: #0: ffff888031d4a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211 1 lock held by syz.1.644/8939: 1 lock held by syz.0.801/10221: 1 lock held by syz-executor/11581: #0: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672 1 lock held by syz-executor/11673: #0: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672 1 lock held by syz-executor/11679: #0: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672 1 lock held by syz-executor/11682: #0: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8fac4128 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc3-syzkaller-00087-gc964ced77262 #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+0x116/0x1f0 lib/dump_stack.c:120 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xf0c/0x1240 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 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: 8939 Comm: syz.1.644 Not tainted 6.12.0-rc3-syzkaller-00087-gc964ced77262 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:sha256_transform_rorx+0x491/0x1120 arch/x86/crypto/sha256-avx2-asm.S:600 Code: 00 c2 45 31 e6 c4 63 7b f0 e1 02 c4 c1 7d fe c0 45 31 e6 41 89 cc 41 21 d4 45 01 ef c5 fd 70 d0 50 44 09 e6 44 01 f3 45 01 f9 <44> 01 fb 01 f3 89 de c4 43 7b f0 e9 19 c4 43 7b f0 f1 0b 03 44 3c RSP: 0018:ffffc900115f7200 EFLAGS: 00000207 RAX: 000000003357dd5f RBX: 0000000090041468 RCX: 00000000a7e785dd RDX: 000000009f51b31d RSI: 000000008f51b59d RDI: 0000000000000080 RBP: ffffc900115f7420 R08: 00000000cd5035ab R09: 0000000068c009dd R10: 00000000ca0dc7c0 R11: 00000000ff34e361 R12: 000000008741811d R13: 00000000fdd296c2 R14: 00000000d903a8d4 R15: 00000000f9297221 FS: 00007f704af0b6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000556573553680 CR3: 0000000050cbe000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline] sha256_base_do_update include/crypto/sha256_base.h:81 [inline] _sha256_update arch/x86/crypto/sha256_ssse3_glue.c:74 [inline] _sha256_update+0x17e/0x220 arch/x86/crypto/sha256_ssse3_glue.c:58 ima_calc_file_hash_tfm+0x302/0x3e0 security/integrity/ima/ima_crypto.c:491 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline] ima_calc_file_hash+0x1ba/0x490 security/integrity/ima/ima_crypto.c:568 ima_collect_measurement+0x8a7/0xa10 security/integrity/ima/ima_api.c:293 process_measurement+0x1271/0x2370 security/integrity/ima/ima_main.c:372 ima_file_mmap+0x1b1/0x1d0 security/integrity/ima/ima_main.c:462 security_mmap_file+0x8bd/0x990 security/security.c:2979 vm_mmap_pgoff+0xdb/0x360 mm/util.c:584 ksys_mmap_pgoff+0x1c8/0x5c0 mm/mmap.c:542 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:79 [inline] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:79 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f704a17dff9 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:00007f704af0b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f704a335f80 RCX: 00007f704a17dff9 RDX: 00004000000000df RSI: 0000002000000004 RDI: 0000000000000002 RBP: 00007f704a1f0296 R08: 0000000000000404 R09: 0000300000000000 R10: 0000000000040eb2 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f704a335f80 R15: 00007ffeb08cd318 --- 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 report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup