From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f71.google.com (mail-ot1-f71.google.com [209.85.210.71]) (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 993AB1FE47B for ; Tue, 24 Feb 2026 05:46:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771911965; cv=none; b=JuBEB0BcbB6zZ4NTseVLKDUoBkMRaFWNj6ukTQ6vK0iT/fJ4OgJbNykpm0/mGtsULypQB2al8y66YLK7IVVZi25faC7jaYHg0rQn0Hl/T8FOjcFOLpGmY30vy6tQROewp8YvwoHwKPe16mkaOi/ju42gGpMv56tay2YVlq+dZ3g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771911965; c=relaxed/simple; bh=XgyiouPzZv23BjEqfdLO4SPNOd7AnVW0FL+cVpq4UB4=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=OfRIBpTQ9BtYnjHw2eSylxktAdF7KVx6zHL+gBVm51l3KFAo8hFYyFW1Fylqg4Txe2n1nhFIo/2d8lFNbW3rLOk942HqsgmSk9/Nr2RFtyAj7EJ8vG8W5hPYKjJuEywMrwfGNIRi2df2a3ffNT/M5lC9/A9pdn7seBkdVqqFYzQ= 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=209.85.210.71 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-ot1-f71.google.com with SMTP id 46e09a7af769-7d4bd29099eso63265824a34.2 for ; Mon, 23 Feb 2026 21:46:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771911962; x=1772516762; 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=TrB6oZiVXxcq8RVNc2tnFPx4Y6r8dJU4GifYAz/d2OA=; b=cKOxeU15HCR5w1/1OboUU4VtXGISloiaXv4yvz/CaAbnNYeyQr6FAMfZMPQuZQ7Xw8 333fbCdP+OEJuUu7RsEwBPKGHzM8tSos1crlqdeuaXywP4+8B8b8pww8DV7VObT49Q0W KbC+oezGwHIrg1Ed6uyrfXoHub/hYdUV2nN+JQsfaIskl0FJIbiEkGVDmZbfwtxQ9HRz S/e58zabDM+MfSPH4QZqC34/eX/XIgzaUS9h+7vim5IUltRqACLT9K0t1QCqESUrpM6k x7AVESyQLvFWzUoffJwS5C5eudBP1yH5B2Da9R/SZAnkvyix2hJgvq2GhD63Xv+5GQwT zXqw== X-Forwarded-Encrypted: i=1; AJvYcCV28CxOghwsp3LykkD1/W68uZLInmbS+dc5dVw/Cprrpc6dtIVRfqxOP3U6pk5ZWZy/wBR5HiUdu4rClG4=@vger.kernel.org X-Gm-Message-State: AOJu0YwRZxX50CAGkBY4sIIs4DIPbKJIsiPh+V4XZvxAnjzzf+2+C0gq OyFE9vzETBXeeOAlwRNQBhyxAWynItv6K75WqgYGh5wC0ByuQEC4jSWkM9n7nF0BR1+OnW+McFv TZVi2i7llBEm1199Hw/56/RiCdNt0Nhq9uAUcDTQGPaG5L7OzHLM8oYIsHxg= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:16a3:b0:66f:280d:56b0 with SMTP id 006d021491bc7-679c42784edmr6215089eaf.16.1771911962642; Mon, 23 Feb 2026 21:46:02 -0800 (PST) Date: Mon, 23 Feb 2026 21:46:02 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <699d3b1a.a00a0220.121a60.00f6.GAE@google.com> Subject: Re: [syzbot] [ocfs2?] possible deadlock in ocfs2_del_inode_from_orphan From: syzbot To: heming.zhao@suse.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: possible deadlock in ocfs2_del_inode_from_orphan (syz.0.44,6753,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xb3775c19, computed 0x2dd1c265. Applying ECC. JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.44/6753 is trying to acquire lock: ffff88805e667000 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] ffff88805e667000 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_del_inode_from_orphan+0x12e/0x7a0 fs/ocfs2/namei.c:2731 but task is already holding lock: ffff88805e66ba10 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2297 [inline] ffff88805e66ba10 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io+0x439/0x1210 fs/ocfs2/aops.c:2403 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 ocfs2_lock_global_qf+0x201/0x290 fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x2a0/0xb70 fs/ocfs2/quota_global.c:828 dqget+0x7b6/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206 ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4483 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x13b4/0x38a0 fs/namei.c:4827 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1383 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_lock_global_qf+0x1da/0x290 fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x2a0/0xb70 fs/ocfs2/quota_global.c:828 dqget+0x7b6/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206 ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4483 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x13b4/0x38a0 fs/namei.c:4827 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1383 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&dquot->dq_lock){+.+.}-{4:4}: __mutex_lock_common kernel/locking/rtmutex_api.c:533 [inline] mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:552 wait_on_dquot fs/quota/dquot.c:357 [inline] dqget+0x72f/0xf10 fs/quota/dquot.c:975 __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206 ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4483 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x13b4/0x38a0 fs/namei.c:4827 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1383 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_remove_inode fs/ocfs2/inode.c:733 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] ocfs2_evict_inode+0x1539/0x44c0 fs/ocfs2/inode.c:1299 evict+0x61e/0xb10 fs/inode.c:846 ocfs2_dentry_iput+0x24d/0x390 fs/ocfs2/dcache.c:407 __dentry_kill+0x1a2/0x5e0 fs/dcache.c:670 finish_dput+0xc9/0x480 fs/dcache.c:879 __fput+0x6a3/0xa90 fs/file_table.c:477 task_work_run+0x1d9/0x270 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline] do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868 down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_del_inode_from_orphan+0x12e/0x7a0 fs/ocfs2/namei.c:2731 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2305 [inline] ocfs2_dio_end_io+0x545/0x1210 fs/ocfs2/aops.c:2403 dio_complete+0x25e/0x790 fs/direct-io.c:281 __blockdev_direct_IO+0x2d0e/0x3330 fs/direct-io.c:1303 ocfs2_direct_IO+0x253/0x2c0 fs/ocfs2/aops.c:2440 generic_file_direct_write+0x1dc/0x3e0 mm/filemap.c:4248 __generic_file_write_iter+0x120/0x240 mm/filemap.c:4417 ocfs2_file_write_iter+0x1666/0x1ed0 fs/ocfs2/file.c:2476 iter_file_splice_write+0x9a6/0x10f0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x104/0x160 fs/splice.c:1159 splice_direct_to_actor+0x545/0xc80 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x19b/0x2a0 fs/splice.c:1228 do_sendfile+0x547/0x7e0 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1419 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] --> &ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE] --> &ocfs2_quota_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_quota_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]); lock(&ocfs2_quota_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]); *** DEADLOCK *** 3 locks held by syz.0.44/6753: #0: ffff88802bf78480 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 fs/splice.c:1158 #1: ffff88805e66bdc0 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #1: ffff88805e66bdc0 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: ocfs2_file_write_iter+0x42c/0x1ed0 fs/ocfs2/file.c:2406 #2: ffff88805e66ba10 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2297 [inline] #2: ffff88805e66ba10 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io+0x439/0x1210 fs/ocfs2/aops.c:2403 stack backtrace: CPU: 1 UID: 0 PID: 6753 Comm: syz.0.44 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868 down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_del_inode_from_orphan+0x12e/0x7a0 fs/ocfs2/namei.c:2731 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2305 [inline] ocfs2_dio_end_io+0x545/0x1210 fs/ocfs2/aops.c:2403 dio_complete+0x25e/0x790 fs/direct-io.c:281 __blockdev_direct_IO+0x2d0e/0x3330 fs/direct-io.c:1303 ocfs2_direct_IO+0x253/0x2c0 fs/ocfs2/aops.c:2440 generic_file_direct_write+0x1dc/0x3e0 mm/filemap.c:4248 __generic_file_write_iter+0x120/0x240 mm/filemap.c:4417 ocfs2_file_write_iter+0x1666/0x1ed0 fs/ocfs2/file.c:2476 iter_file_splice_write+0x9a6/0x10f0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x104/0x160 fs/splice.c:1159 splice_direct_to_actor+0x545/0xc80 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x19b/0x2a0 fs/splice.c:1228 do_sendfile+0x547/0x7e0 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1419 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8cb2c5bf79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8cb22b6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f8cb2ed5fa0 RCX: 00007f8cb2c5bf79 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006 RBP: 00007f8cb2cf27e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000120fffe82 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8cb2ed6038 R14: 00007f8cb2ed5fa0 R15: 00007ffcf6581c38 Tested on: commit: 7dff99b3 Remove WARN_ALL_UNSEEDED_RANDOM kernel config.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17a6455a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=cdc0fa200f7ea4d0 dashboard link: https://syzkaller.appspot.com/bug?extid=78359d5fbb04318c35e9 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=17da2152580000