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 5994E187332 for ; Wed, 4 Jun 2025 22:40:23 +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=1749076825; cv=none; b=r2Bz//B+4HVNBttZH35dxSS+ujzamEcHgw1016VvUmB1o1hF5f9lufSNxCj4OagExr3/U7b6Q3U8EsjSEOAfmpYRR6MK3JjTNrR4BzDh0kafM91gY5Bbo2z6XRfXQFey8/IhqcWYZvsoexLEINRPOjP2kv9ernqicz07Pc6k+aw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749076825; c=relaxed/simple; bh=yJKEo6PKKsFEaoY+Wb+NuTVHnNoK8lm+1WZEK3Oda0s=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=uXUgUcoCavyC5oD7sj7ejLNEkuJo2aDel3a0S1DXgXGJ42p7eUBH6GSXRb+4tfPI4odG2S5/Z5u4U/8dpppPwIf66lY0OfTXblW/MKFcxBTW6GcAFsM2UjLjC7yFxFffjavtGFK4Fe7Fd7RR6D0v73GnGP8h8feaGfjRwyvSirM= 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-3ddb9d32cfeso7402985ab.3 for ; Wed, 04 Jun 2025 15:40:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749076822; x=1749681622; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=U3CVkFYSih42dMa4crK8+2r1dGR38THO+9uTUAByLCA=; b=XjUtJw11F/lUj5HwRVKhzu03gNI9x9p8vB/VMRigxECGI5aG4PPdvLCmE3jNGl4GnR ioLCO6yucGMkhi9AxD7iY0fGIdkTFNhVskAJKLTHvlEI3IogP2k+elsbbptZQzty+nyy Bx/XMPXSQd0NN0s1yNvmnACy7lOLjNSomjBVBiUO4wCJXxTd1XpRNd2MADb6MxyoIFYX cKfwRwx4M+wRa1Zgl1rtJHnZqNYXpwr2uLuIeaR7V10mFDL3FvW5G27l6rvohG5g4gFS RYblfcNqTpiTNWKKk6FyXQWUfMxOzCDbxX6veTWhhNCAv2/rdC5tYl/F9tOvnC86hu4O ZzIA== X-Forwarded-Encrypted: i=1; AJvYcCVtssIGK1pE1QtgrQMcpcosIgnr+AO7OuyDDzYbmEgqJLUvRGh+n4Lfjz2kMd739JKcFWtJ@lists.linux.dev X-Gm-Message-State: AOJu0YxgTwciORgkiaj8hFO9b9WoaIAl5w3Llr3CTZJNmKbajqSs5bPN BjTMtp7ma3qeP0/FpGFhe9rimIWRC2lRL7e/IBoId+qifQ1t78iuyTtk1sgurrQd5nLW8Ckvolh +9IKYRdRPFi40JN+5BnMK8v/rc8LmOVXMMoCMCfZoj7/045d17LdzJLV+ODo= X-Google-Smtp-Source: AGHT+IFKEm94hei2X92UPF3Njhb1nrH8QDmc/JVW364mYXZ44FCQBlnszvgmqeD1KinChAldYeR4HW+NW5Cz2fvi7aow2w4Axee9 Precedence: bulk X-Mailing-List: v9fs@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:398d:b0:3db:877a:dff4 with SMTP id e9e14a558f8ab-3ddbed62af1mr53474965ab.14.1749076822447; Wed, 04 Jun 2025 15:40:22 -0700 (PDT) Date: Wed, 04 Jun 2025 15:40:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6840cb56.a00a0220.d4325.000f.GAE@google.com> Subject: [syzbot] [v9fs?] [ext4?] INFO: task hung in __iterate_supers From: syzbot To: asmadeus@codewreck.org, ericvh@kernel.org, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux_oss@crudebyte.com, lucho@ionkov.net, syzkaller-bugs@googlegroups.com, v9fs@lists.linux.dev Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 3a83b350b5be Add linux-next specific files for 20250530 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=127da00c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=28859360c84ac63d dashboard link: https://syzkaller.appspot.com/bug?extid=b10aefdd9ef275e9368d compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13765970580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12f4b00c580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e18e458d13c9/disk-3a83b350.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a1c40854811c/vmlinux-3a83b350.xz kernel image: https://storage.googleapis.com/syzbot-assets/571f670b130a/bzImage-3a83b350.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/f51e108aa24a/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=15765970580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b10aefdd9ef275e9368d@syzkaller.appspotmail.com INFO: task syz-executor419:5916 blocked for more than 143 seconds. Not tainted 6.15.0-next-20250530-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor419 state:D stack:29576 pid:5916 tgid:5890 ppid:5883 task_flags:0x400040 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 super_lock+0x1c8/0x3b0 fs/super.c:115 __iterate_supers+0x126/0x250 fs/super.c:923 ksys_sync+0x94/0x150 fs/sync.c:102 __ia32_sys_sync+0xe/0x20 fs/sync.c:113 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f90546eea09 RSP: 002b:00007f9054678218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f90547706f8 RCX: 00007f90546eea09 RDX: 00007f90546c5526 RSI: 0000000000000000 RDI: 00007f9054678fb0 RBP: 00007f90547706f0 R08: 00007ffc16b879e7 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f905473ca1c R13: 000000000000006e R14: 0000200000000040 R15: 00007ffc16b879e8 INFO: task syz-executor419:5913 blocked for more than 144 seconds. Not tainted 6.15.0-next-20250530-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor419 state:D stack:28584 pid:5913 tgid:5891 ppid:5881 task_flags:0x400040 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 super_lock+0x1c8/0x3b0 fs/super.c:115 __iterate_supers+0x126/0x250 fs/super.c:923 ksys_sync+0x94/0x150 fs/sync.c:102 __ia32_sys_sync+0xe/0x20 fs/sync.c:113 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f90546eea09 RSP: 002b:00007f9054678218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f90547706f8 RCX: 00007f90546eea09 RDX: 00007f90546c5526 RSI: 0000000000000000 RDI: 00007f9054678fb0 RBP: 00007f90547706f0 R08: 00007ffc16b879e7 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f905473ca1c R13: 000000000000006e R14: 0000200000000040 R15: 00007ffc16b879e8 INFO: task syz-executor419:5914 blocked for more than 144 seconds. Not tainted 6.15.0-next-20250530-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor419 state:D stack:29544 pid:5914 tgid:5892 ppid:5882 task_flags:0x400040 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 super_lock+0x1c8/0x3b0 fs/super.c:115 __iterate_supers+0x126/0x250 fs/super.c:923 ksys_sync+0x94/0x150 fs/sync.c:102 __ia32_sys_sync+0xe/0x20 fs/sync.c:113 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f90546eea09 RSP: 002b:00007f9054678218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f90547706f8 RCX: 00007f90546eea09 RDX: 00007f90546c5526 RSI: 0000000000000000 RDI: 00007f9054678fb0 RBP: 00007f90547706f0 R08: 00007ffc16b879e7 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f905473ca1c R13: 000000000000006e R14: 0000200000000040 R15: 00007ffc16b879e8 INFO: task syz-executor419:5915 blocked for more than 145 seconds. Not tainted 6.15.0-next-20250530-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor419 state:D stack:29576 pid:5915 tgid:5893 ppid:5880 task_flags:0x400040 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 super_lock+0x1c8/0x3b0 fs/super.c:115 __iterate_supers+0x126/0x250 fs/super.c:923 ksys_sync+0x94/0x150 fs/sync.c:102 __ia32_sys_sync+0xe/0x20 fs/sync.c:113 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f90546eea09 RSP: 002b:00007f9054678218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f90547706f8 RCX: 00007f90546eea09 RDX: 00007f90546c5526 RSI: 0000000000000000 RDI: 00007f9054678fb0 RBP: 00007f90547706f0 R08: 00007ffc16b879e7 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f905473ca1c R13: 000000000000006e R14: 0000200000000040 R15: 00007ffc16b879e8 INFO: task syz-executor419:5917 blocked for more than 145 seconds. Not tainted 6.15.0-next-20250530-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor419 state:D stack:29576 pid:5917 tgid:5895 ppid:5879 task_flags:0x400040 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6785 __schedule_loop kernel/sched/core.c:6863 [inline] schedule+0x165/0x360 kernel/sched/core.c:6878 super_lock+0x1c8/0x3b0 fs/super.c:115 __iterate_supers+0x126/0x250 fs/super.c:923 ksys_sync+0x94/0x150 fs/sync.c:102 __ia32_sys_sync+0xe/0x20 fs/sync.c:113 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f90546eea09 RSP: 002b:00007f9054678218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f90547706f8 RCX: 00007f90546eea09 RDX: 00007f90546eea09 RSI: 0000000000000000 RDI: 0000000000000080 RBP: 00007f90547706f0 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffc16b879e7 R11: 0000000000000246 R12: 00007f905473ca1c R13: 000000000000006e R14: 0000200000000040 R15: 00007ffc16b879e8 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8e13f140 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8e13f140 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8e13f140 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770 2 locks held by getty/5595: #0: ffff888034dd90a0 (&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+0x43e/0x1400 drivers/tty/n_tty.c:2222 1 lock held by syz-executor419/5894: 1 lock held by syz-executor419/5897: 1 lock held by syz-executor419/5896: 1 lock held by syz-executor419/5898: 1 lock held by syz-executor419/5900: ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-next-20250530-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline] watchdog+0xfee/0x1030 kernel/hung_task.c:470 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5900 Comm: syz-executor419 Not tainted 6.15.0-next-20250530-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:its_return_thunk+0x0/0x10 arch/x86/lib/retpoline.S:412 Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 8b 84 ca f5 cc RSP: 0018:ffffc9000469fa38 EFLAGS: 00000293 RAX: ffffffff81ad3201 RBX: ffffc9000469fb20 RCX: ffff88807fc99e00 RDX: 0000000000000000 RSI: 746e756f6d65723d RDI: 000000003b9ac9ff RBP: ffffc9000469faf0 R08: ffffffff8fa127f7 R09: 1ffffffff1f424fe R10: dffffc0000000000 R11: fffffbfff1f424ff R12: ffffc9000469fa80 R13: ffffffffc4653600 R14: 195d9dfa908f7e3d R15: 73726f73f98510d7 FS: 00007f90546996c0(0000) GS:ffff888125d53000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005606f52b3168 CR3: 0000000077c1a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: set_normalized_timespec64+0xc1/0x1a0 kernel/time/time.c:497 inode_set_ctime_to_ts+0x126/0x2f0 fs/inode.c:2666 inode_set_ctime include/linux/fs.h:1773 [inline] v9fs_stat2inode_dotl+0x4f6/0xad0 fs/9p/vfs_inode_dotl.c:656 v9fs_qid_iget_dotl fs/9p/vfs_inode_dotl.c:128 [inline] v9fs_inode_from_fid_dotl+0x206/0x2b0 fs/9p/vfs_inode_dotl.c:154 v9fs_get_new_inode_from_fid fs/9p/v9fs.h:251 [inline] v9fs_mount+0x6cb/0xa10 fs/9p/vfs_super.c:142 legacy_get_tree+0xfa/0x1a0 fs/fs_context.c:666 vfs_get_tree+0x8f/0x2b0 fs/super.c:1802 do_new_mount+0x24a/0xa40 fs/namespace.c:3856 do_mount fs/namespace.c:4193 [inline] __do_sys_mount fs/namespace.c:4404 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4381 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f90546eea09 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 1f 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:00007f9054699218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f90547706e8 RCX: 00007f90546eea09 RDX: 0000200000000b80 RSI: 0000200000000040 RDI: 0000000000000000 RBP: 00007f90547706e0 R08: 0000200000000580 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f905473ca1c R13: 0000200000000580 R14: 0000200000000040 R15: 00007f905473c04d --- 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 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. 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