From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 7C35B14AD2E for ; Sat, 7 Dec 2024 19:18:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733599109; cv=none; b=bQZgaH2aqmMn9oR71Dp4m4JN1B5ux/7xbfI+WcSUMaTcQkOJYL3vZwAwnAMliQ6TxmoZ12GO6LHjSDC7VyrMRhwyvtu3m2dmm6iVGmb31hS5wgS/hfpK1+UKYmvJ01xv/ZoU/vv1qznYa7+pTQ2IxchoYngUsxXhSv3ONp3VqMw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733599109; c=relaxed/simple; bh=EIz4KabPAj0rOEIFUfsJmLNnGTuKpD/NluN+kyGkwCk=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=EfICCul9GEOVXsTB16vYsnSmcdwOeBn5MaPMYzbDml6n1Ivk/p6FPBucPQKhonzpbuRpXn2XdUoH6H727tgq1Z5oKpt+Hc+CuvMD3NWf2pQb8cRbSk4SL2z6KkRIKs06nzEdeyYhq1eCCoA5s35Cu10gP/AhTUa+3gonyuGz9FE= 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=209.85.166.208 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-f208.google.com with SMTP id e9e14a558f8ab-3a91a13f63fso6546505ab.3 for ; Sat, 07 Dec 2024 11:18:27 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733599106; x=1734203906; 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=FGzxBGWUGEudtCAKk4uMcizyqM7JNg04s2BYXL8B0TU=; b=oYqxJmXPP8TjbqZAsFO5h4ts7bE4eM33unVP+V6xyON3fGajI1WSu1xY7rw/Fg0+HD ljYhD2UY+vjvHKsBQ6Z4mz/hr/ZTllJkxwdYlNWnlhz14cpcoRyTwTxPc1+nQSDiAVKN ITvgED6oZHIxi2ut886+JASjNqJpxoYJUCbk0AjjP2cqbH7T7kqnci0UzYKuYy291BSx wWLLcc1Y8LEFQGUujl3Eq3HkC+2QGQYOox9YnSLViv+WKTul3kI0ocTmztPmpTvRNMlJ NkZD9C5PfyacHSp84RPBy5vYbXMnt2Og78UX7/dld92RB4pWwf0is69NUSfhGlFQtzns S4QQ== X-Forwarded-Encrypted: i=1; AJvYcCXC7lEiOEJhlW1HxitXhfliPp6dnX0a45fuY1782fjCF50BiFdgEqvvfMsle2X82H3I5AMznghPYHfckK37Pg8TNbLwc/0=@vger.kernel.org X-Gm-Message-State: AOJu0Yyqj0hIV+lXaEFdEJX/n4+9Qt+1x+sr0UAaC0SXBtc8HsLiqGYy 1hOElgi2lgXcsw3lFMWxbSt3qrvQ6/tftuHf7WFsERnHyivZ8D8w822/VGcNbKTO+25sEgtnpFw UzI9forkp0sMDK/8bWg6S4AmEzM3x0WTBZm+5tW5yVqNbCKYShuBG80Y= X-Google-Smtp-Source: AGHT+IG8yl4utWwy6hc6H+udRwWwIVAHjJvBhuPt6ziB3wiXQseHsYdq66/0AfS33UvSR1/AIsGmWeaGs09y9HzQ2DNo6e2w+zYS 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:a05:6e02:1a24:b0:3a2:6cd7:3250 with SMTP id e9e14a558f8ab-3a811d9287cmr70249255ab.10.1733599106629; Sat, 07 Dec 2024 11:18:26 -0800 (PST) Date: Sat, 07 Dec 2024 11:18:26 -0800 In-Reply-To: <00000000000065deef0604e8fe03@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67549f82.050a0220.a30f1.0160.GAE@google.com> Subject: Re: [syzbot] [integrity?] [lsm?] INFO: task hung in process_measurement (2) From: syzbot To: dmitry.kasatkin@gmail.com, eric.snowberg@oracle.com, jmorris@namei.org, linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, paul@paul-moore.com, roberto.sassu@huawei.com, serge@hallyn.com, syzkaller-bugs@googlegroups.com, zohar@linux.ibm.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: b5f217084ab3 Merge tag 'bpf-fixes' of git://git.kernel.org.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=17307330580000 kernel config: https://syzkaller.appspot.com/x/.config?x=335e39020523e2ed dashboard link: https://syzkaller.appspot.com/bug?extid=1de5a37cb85a2d536330 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=126a8820580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=153e70f8580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/3b2c9b99ecf6/disk-b5f21708.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/3458db92b2a8/vmlinux-b5f21708.xz kernel image: https://storage.googleapis.com/syzbot-assets/e14f0c677748/bzImage-b5f21708.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/928495b63af4/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1de5a37cb85a2d536330@syzkaller.appspotmail.com INFO: task syz-executor240:5823 blocked for more than 143 seconds. Not tainted 6.13.0-rc1-syzkaller-00316-gb5f217084ab3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor240 state:D stack:25592 pid:5823 tgid:5820 ppid:5819 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: 0033:0x7f7788ca3409 RSP: 002b:00007f7788c39218 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f7788d2b5f8 RCX: 00007f7788ca3409 RDX: 0000000000000008 RSI: 0000000000002000 RDI: 0000000020001b80 RBP: 00007f7788d2b5f0 R08: 00007ffddcf3bf57 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7788d2b5fc R13: 0032656c69662f2e R14: 00007f7788cf70c0 R15: 00000000200002c0 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937aa0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744 2 locks held by getty/5579: #0: ffff888035afa0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 5 locks held by syz-executor240/5822: 1 lock held by syz-executor240/5823: #0: ffff8880744782a0 (&sb->s_type->i_mutex_key#14){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] #0: ffff8880744782a0 (&sb->s_type->i_mutex_key#14){++++}-{4:4}, at: process_measurement+0x439/0x1fb0 security/integrity/ima/ima_main.c:250 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc1-syzkaller-00316-gb5f217084ab3 #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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5822 Comm: syz-executor240 Not tainted 6.13.0-rc1-syzkaller-00316-gb5f217084ab3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:EXFAT_SB fs/exfat/exfat_fs.h:336 [inline] RIP: 0010:exfat_ent_get+0x3d/0x400 fs/exfat/fatent.c:88 Code: 89 d7 41 89 f5 49 89 fe 49 bc 00 00 00 00 00 fc ff df e8 46 a5 20 ff 49 8d 9e 38 06 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 <74> 08 48 89 df e8 69 66 88 ff 48 8b 1b bf 01 00 00 00 44 89 ee e8 RSP: 0018:ffffc90003ad7348 EFLAGS: 00000246 RAX: 1ffff11006b350c7 RBX: ffff8880359a8638 RCX: ffff8880343c1e00 RDX: 0000000000000000 RSI: 0000000000000010 RDI: ffff8880359a8000 RBP: ffffc90003ad74b8 R08: ffffffff827ed915 R09: 1ffff1100eef7874 R10: dffffc0000000000 R11: ffffed100eef7875 R12: dffffc0000000000 R13: 0000000000000010 R14: ffff8880359a8000 R15: ffffc90003ad7440 FS: 00007f7788c5a6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c822941600 CR3: 00000000783fc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __exfat_free_cluster+0x56f/0x990 fs/exfat/fatent.c:200 exfat_free_cluster+0x77/0xd0 fs/exfat/fatent.c:232 __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: 0033:0x7f7788ca3409 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7788c5a218 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f7788d2b5e8 RCX: 00007f7788ca3409 RDX: 00007f7788ca3409 RSI: 0000000000000100 RDI: 0000000020000000 RBP: 00007f7788d2b5e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7788d2b5ec R13: 0032656c69662f2e R14: 00007f7788cf70c0 R15: 00000000200002c0 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.409 msecs --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.