From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f78.google.com (mail-oo1-f78.google.com [209.85.161.78]) (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 9C548403E96 for ; Thu, 4 Jun 2026 11:18:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780571902; cv=none; b=BtY4SXuspQV3L+LgXGDiugMoq7wurAAxToxEpcyX+izmCHewTlljGVT5yOi85/OkQYypMxZL//LyyyRMtK9Ul4KUNXP6puIDUUq6f+P4t6/1QfNTFnGFp5IP120qgB6A9P3jP7z3pcwr3GnmyeK7Na01aqOWzW9QqQDJ2civ2fU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780571902; c=relaxed/simple; bh=d5VdWK1+H80Dsa34WO65SRkZQeGT4FmQd+DCmdv1T6c=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=aOQv/cQTwwxSOQUr6o9II8ky1Ftr9kWrV1kWWjWT1aCzPJtN5r80ox+tPfW+gQlzdgwxRIfDJqk4S/Yglbyzuyym9IVmn+vKjrXqEB799/S4wGitbAKXc1LgFAi3WbD1TuGBnY4srnTIPPmK3cWkbO0iVMWxc+TgBzT+0C/U2Wk= 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=209.85.161.78 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-oo1-f78.google.com with SMTP id 006d021491bc7-69d77736830so1082813eaf.3 for ; Thu, 04 Jun 2026 04:18:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780571899; x=1781176699; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Ubxxjku7PYwhCYZFVou8sGl7341e1/NagOd+O/zRRbI=; b=poGmWSjaH/zTMMtt65zOFURUKNPI8bNkNvJa+QGgaXDidppPTetHsdwl8XTu3X6SQK ho2+WZtIvDt1OW9ceRLvN73Y1etYY11jQzeurI6xJRLq0r9yPlcPts2M9Em4CzikhlFR QEto5/UdFOwmmu+JE4WwMuBv3wyRbz/yVsEODnQ3dtynx6zdAS++f2sG/lHYogqxraud wgklNC4abziV+5bZT0evW0IReR34nAj0kACMW8cYkkRqHqg+xFtpWoYZkOiT2Z5TGzWN RE+JV0QZhvmMTe8p5lFYx7EE0RUiP/XS4ogCeqawEPzTSCYpOp3shbcYBOuzkdeC+L6E LKdg== X-Forwarded-Encrypted: i=1; AFNElJ8L74aD5oDGf1+IBxAl5wpKJJUG6wdeyPdDX2IGtQmj2a98WDq/E2fpyzeam95baCsm4/fk4YHyEkugkTA=@vger.kernel.org X-Gm-Message-State: AOJu0YxrY5rrRPFe5gTMzeCFX3Yi642wsZtImD6Od4+cRoP1+rPktZ9z irI3MuMoJ64R5qt1FSfI9tDxMZfGR5RX5fx5jYnP5M6tamF3WVNOBLuaubECxUvNWqmJgOQnJak XD2fWIRRtPSTre+vxsg7HEI3A19cvb7JlkOPCf16LlyMahCQyJ1VsSQbJDvc= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4c14:b0:696:2480:dee0 with SMTP id 006d021491bc7-69e47f6aac5mr4109831eaf.34.1780571899601; Thu, 04 Jun 2026 04:18:19 -0700 (PDT) Date: Thu, 04 Jun 2026 04:18:19 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a215efb.e4db5ad2.5fee4.005e.GAE@google.com> Subject: [syzbot] [ocfs2?] possible deadlock in ocfs2_remove_refcount_tree From: syzbot To: jlbec@evilplan.org, joseph.qi@linux.alibaba.com, linux-kernel@vger.kernel.org, mark@fasheh.com, ocfs2-devel@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 174914ea5513 Merge tag 'v7.1-rc6-smb3-client-fixes' of git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15dbad2e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b4166e8ea5fbf7e3 dashboard link: https://syzkaller.appspot.com/bug?extid=ad7eca1cdf5d9c9db672 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-174914ea.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/343eb2c4ac93/vmlinux-174914ea.xz kernel image: https://storage.googleapis.com/syzbot-assets/b9e6c020ebad/bzImage-174914ea.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ad7eca1cdf5d9c9db672@syzkaller.appspotmail.com ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.0/5329 is trying to acquire lock: ffff888047a9c1a0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] ffff888047a9c1a0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_refcount_tree+0x58d/0xe50 fs/ocfs2/refcounttree.c:803 but task is already holding lock: ffff888012277090 (&new->rf_sem){+.+.}-{4:4}, at: __ocfs2_lock_refcount_tree fs/ocfs2/refcounttree.c:428 [inline] ffff888012277090 (&new->rf_sem){+.+.}-{4:4}, at: ocfs2_lock_refcount_tree+0x1b7/0xa40 fs/ocfs2/refcounttree.c:463 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&new->rf_sem){+.+.}-{4:4}: down_write+0x96/0x200 kernel/locking/rwsem.c:1625 __ocfs2_lock_refcount_tree fs/ocfs2/refcounttree.c:428 [inline] ocfs2_lock_refcount_tree+0x1b7/0xa40 fs/ocfs2/refcounttree.c:463 ocfs2_remove_refcount_tree+0x245/0xe50 fs/ocfs2/refcounttree.c:775 ocfs2_wipe_inode fs/ocfs2/inode.c:890 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] ocfs2_evict_inode+0x142b/0x43b0 fs/ocfs2/inode.c:1299 evict+0x61e/0xb10 fs/inode.c:841 ocfs2_dentry_iput+0x24d/0x390 fs/ocfs2/dcache.c:407 __dentry_kill+0x1a2/0x690 fs/dcache.c:718 finish_dput+0xc9/0x480 fs/dcache.c:927 __fput+0x691/0xa60 fs/file_table.c:518 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+0x193/0x680 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x96/0x200 kernel/locking/rwsem.c:1625 inode_lock include/linux/fs.h:1029 [inline] ocfs2_del_inode_from_orphan+0x12e/0x7a0 fs/ocfs2/namei.c:2728 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2379 [inline] ocfs2_dio_end_io+0xf9c/0x1370 fs/ocfs2/aops.c:2418 dio_complete+0x25b/0x790 fs/direct-io.c:281 __blockdev_direct_IO+0x2e5d/0x34e0 fs/direct-io.c:1303 ocfs2_direct_IO+0x251/0x2c0 fs/ocfs2/aops.c:2455 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4259 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4428 ocfs2_file_write_iter+0x1663/0x1e70 fs/ocfs2/file.c:2476 iter_file_splice_write+0x9a1/0x10f0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x101/0x160 fs/splice.c:1159 splice_direct_to_actor+0x53a/0xc70 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x195/0x290 fs/splice.c:1228 do_sendfile+0x535/0x7d0 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+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_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+0x106/0x350 kernel/locking/lockdep.c:5868 down_write+0x96/0x200 kernel/locking/rwsem.c:1625 inode_lock include/linux/fs.h:1029 [inline] ocfs2_remove_refcount_tree+0x58d/0xe50 fs/ocfs2/refcounttree.c:803 ocfs2_wipe_inode fs/ocfs2/inode.c:890 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] ocfs2_evict_inode+0x142b/0x43b0 fs/ocfs2/inode.c:1299 evict+0x61e/0xb10 fs/inode.c:841 ocfs2_dentry_iput+0x24d/0x390 fs/ocfs2/dcache.c:407 __dentry_kill+0x1a2/0x690 fs/dcache.c:718 finish_dput+0xc9/0x480 fs/dcache.c:927 __fput+0x691/0xa60 fs/file_table.c:518 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+0x193/0x680 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE] --> &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] --> &new->rf_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&new->rf_sem); lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]); lock(&new->rf_sem); lock(&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]); *** DEADLOCK *** 3 locks held by syz.0.0/5329: #0: ffff888012048bc0 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0x106/0x270 fs/ocfs2/dlmglue.c:2875 #1: ffff888047a9cfa0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline] #1: ffff888047a9cfa0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:854 [inline] #1: ffff888047a9cfa0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] #1: ffff888047a9cfa0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0xe97/0x43b0 fs/ocfs2/inode.c:1299 #2: ffff888012277090 (&new->rf_sem){+.+.}-{4:4}, at: __ocfs2_lock_refcount_tree fs/ocfs2/refcounttree.c:428 [inline] #2: ffff888012277090 (&new->rf_sem){+.+.}-{4:4}, at: ocfs2_lock_refcount_tree+0x1b7/0xa40 fs/ocfs2/refcounttree.c:463 stack backtrace: CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 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+0x106/0x350 kernel/locking/lockdep.c:5868 down_write+0x96/0x200 kernel/locking/rwsem.c:1625 inode_lock include/linux/fs.h:1029 [inline] ocfs2_remove_refcount_tree+0x58d/0xe50 fs/ocfs2/refcounttree.c:803 ocfs2_wipe_inode fs/ocfs2/inode.c:890 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] ocfs2_evict_inode+0x142b/0x43b0 fs/ocfs2/inode.c:1299 evict+0x61e/0xb10 fs/inode.c:841 ocfs2_dentry_iput+0x24d/0x390 fs/ocfs2/dcache.c:407 __dentry_kill+0x1a2/0x690 fs/dcache.c:718 finish_dput+0xc9/0x480 fs/dcache.c:927 __fput+0x691/0xa60 fs/file_table.c:518 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+0x193/0x680 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1074f9ce59 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:00007ffcfa6825f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007ffcfa6826e0 RCX: 00007f1074f9ce59 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 0000000000012125 R08: 0000000000000001 R09: 0000000000000000 R10: 00007f1074dff030 R11: 0000000000000246 R12: 00007ffcfa682720 R13: 00007f1075215fac R14: 0000000000012813 R15: 00007f1075215fa0 --- This report is generated by a bot. 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