From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-vk1-f174.google.com (mail-vk1-f174.google.com [209.85.221.174]) (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 CE0A535675B for ; Fri, 26 Jun 2026 21:29:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782509381; cv=none; b=NDyujLO/cQdo58p4/2aMMgsL5bKTiR7nPvBlpj+Q8h/GtiCiXn02sE2Dg1s+m9+opoLObUTW39zIgl8Kvv2waaFn/gFYLtPaOMezjl5boLbkKbk8SkJ1Rcn8DLj8P1xqLk6/oFptbAtf5aKlqRzOncwOyvmWZ+uHHTVtRqLxMVM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782509381; c=relaxed/simple; bh=Te7Qe9n5KeqWSkzz0wWLJQkHy7C8DdO2hnA5VVMwWrw=; h=Message-ID:Date:Subject:To:Cc:Content-Type:MIME-Version:From; b=sRTR8nPxKfYJcIIUr08mf/NxDQAqJWGvQCPDsSklKZ/KPtjXSAzZwc7xLzfGNungPaek78915jDW8CRlPvEAxUbJ+Wpe08pbCQZK2qw8DGR74SwinS7wE2nhYMY+Ii4wQs0yYeUiLXUpVYn1M/WO9Dt5C2HCgIReCRfXDq1nHCY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=tEnCykcL; arc=none smtp.client-ip=209.85.221.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="tEnCykcL" Received: by mail-vk1-f174.google.com with SMTP id 71dfb90a1353d-5bd79cbfb77so36258e0c.0 for ; Fri, 26 Jun 2026 14:29:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1782509379; x=1783114179; darn=vger.kernel.org; h=from:mime-version:content-transfer-encoding:content-type:cc:to :subject:date:message-id:from:to:cc:subject:date:message-id:reply-to :content-type; bh=zXnOx3ea0LltqK75INcyd259m4s/13Ts31nbNGHd9Ig=; b=tEnCykcLvioedH91fz/vBcxlufR1RBOB3ZpRQ0RM9JmwaYK5UEUA3O18AvFaHzYcrz VdgSZGwiBweb8obaaFrXt4aXhfqPxZVd3PAMbYFYjYHHVfhsxHe1B1R6+no98PBlDGT4 yk89VyDST52c3VAWxZ2Xw56e86o6aQWYH8IsXAhG8kPYwlDDf8UQovNzWk3MxM09lupS TEGxOt2wasm1DBaGhpMSXEBd7k/CgnFwxsQVYzSnCHc4t8HZrv3j1jqWKq8XHE0SmxDx emBupMsMz5oI7qlqLKwuCMvmvhoSpNoMBwEQk+I9foDhhsB1XNjmjIMPFiubLPXE9AoG MqvA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782509379; x=1783114179; h=from:mime-version:content-transfer-encoding:content-type:cc:to :subject:date:message-id:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to:content-type; bh=zXnOx3ea0LltqK75INcyd259m4s/13Ts31nbNGHd9Ig=; b=E7jJ8dFFGUW8vHsHmVub+Xm0ceVvzgkvPDqcpzn0f8h/hcMWobSNvQPkrn7Gv9vktj P7MEhCO7DF4HXlvBi0DrdwNnCVwTcy8SGGEHjRiFwsjV/Lg1pK1frjr5ZfnAQ1Ns4sMt 0nVmPgFPHzf1WfN8JJHEkgJUSK9zCJcirusiBweejwbo9lp8Ha8Ywg6J2HpO1W5eVvFT wUrlrMq2FSt/Lm6iAlLbKnqNZEzpBoAOFp/3G/5WCbFJe2agt4ZMlT8T5cQ8ANSLB1t2 euEURtP23zEKMj60UU2AUvB3zrekd39l6DWxyV24q9mfY2R4+fxZkfLfJtPIvc5KHUrI T5XA== X-Forwarded-Encrypted: i=1; AHgh+RoH7PDWXt0c5+r6hqYfjRWK/nbQYiqqsogHLMlujQwSjB014oekMh2hP+L99LOjNjMpsf+OcqOX8oXNOtw=@vger.kernel.org X-Gm-Message-State: AOJu0YzCDO0a1J2jBN6PYGFR527iHP3gTUC6BX1YvgWc8gdn5YCoSold lRuoKe1VnicQd2c09SgTJ5Pd9ucN9jXJmZ1vNCXNUXkpBNqNkVNMLTsh X-Gm-Gg: AfdE7cnVnv/3RK91rnMsDjtCCh2vOmAPzFynTxR4J3jYXsfzu6VXcBUft3jQhAy4R2F JVXy1f/a5CYAoEAAP2epENCNzqOQ9/Cx3kU+suYWxOeYJltA2hKRN1CmkvpGTBDgizXWRtqBI9u 4s8lWT9DPvVrolQPhESEA55K12Pb7+op2gAsFhFr8//gUuluqzObocKjXnYCVg7QXKqt5ocvxHd dBcA6GhDVBFWonCw9RYJyFBc1cFQNVRNo9lmlBquUf6sVSTZWueZxf5cLEg6EoIEDAw9tNzN+zw fV/ZJytCRoLNBXVJrkle81aPr+plRxXAke1fcH9DNXQNDeNU0OAwIyfbh4Dtd4+yJL3aNXXmoLG CRSS30EB+BorBedg4vrmDi96elL8nWMsLTVilrD/sWT70y27vAbHreG0OHzkZQ30mcGo0JS2Fba Mi1fnq/kjid3KzA4a2AZ6qR9psux4qIPhgpRQUY9XjywAc/CM5nwSvs6tqTQKmpoThB28a6KRXC u5IeA+xOp+v X-Received: by 2002:a05:6122:10e5:b0:5bd:68f6:31c9 with SMTP id 71dfb90a1353d-5bd69e0d598mr1250282e0c.3.1782509378949; Fri, 26 Jun 2026 14:29:38 -0700 (PDT) Received: from [192.168.10.115] ([132.170.207.48]) by smtp.gmail.com with ESMTPSA id 71dfb90a1353d-5bd78e4c6cbsm1893124e0c.4.2026.06.26.14.29.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 Jun 2026 14:29:38 -0700 (PDT) Message-ID: <6a3eef42.4ad61264.123291.6877@mx.google.com> Date: Fri, 26 Jun 2026 14:29:38 -0700 (PDT) Subject: possible deadlock in ocfs2_xattr_set To: mark@fasheh.com, jlbec@evilplan.org, joseph.qi@linux.alibaba.com, ocfs2-devel@lists.linux.dev, linux-kernel@vger.kernel.org Cc: syzkaller@googlegroups.com, contact@pgazz.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: sanan.hasanou@gmail.com Good day, dear maintainers, We found a bug using a modified version of syzkaller. Kernel Branch: 7.0-rc1 Kernel Config: Unfortunately, we don't have any reproducer for this bug yet. Thank you! Best regards, Sanan Hasanov ====================================================== WARNING: possible circular locking dependency detected 7.0.0-rc1 #1 Tainted: G L ------------------------------------------------------ syz.2.3024/27235 is trying to acquire lock: ffff88804960df40 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] ffff88804960df40 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_xattr_set+0xb12/0x1220 fs/ocfs2/xattr.c:3653 but task is already holding lock: ffff888062436ab8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x42d/0x1220 fs/ocfs2/xattr.c:3614 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&oi->ip_xattr_sem){++++}-{4:4}: down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 ocfs2_init_acl+0x2f7/0x7a0 fs/ocfs2/acl.c:367 ocfs2_mknod+0x1327/0x20c0 fs/ocfs2/namei.c:414 ocfs2_mkdir+0x181/0x470 fs/ocfs2/namei.c:660 vfs_mkdir+0x408/0x620 fs/namei.c:5233 filename_mkdirat+0x27b/0x500 fs/namei.c:5266 __do_sys_mkdir fs/namei.c:5293 [inline] __se_sys_mkdir+0x34/0x150 fs/namei.c:5290 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x160/0xfc0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x4b/0x53 -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x36a/0x6d0 fs/ocfs2/journal.c:369 ocfs2_mknod+0xe97/0x20c0 fs/ocfs2/namei.c:365 vfs_mknod+0x43d/0x600 fs/namei.c:5092 filename_mknodat+0x3bf/0x640 fs/namei.c:-1 __do_sys_mknodat fs/namei.c:5173 [inline] __se_sys_mknodat+0x3b/0x150 fs/namei.c:5169 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x160/0xfc0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x4b/0x53 -> #1 (sb_internal#3){.+.+}-{0:0}: percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs/super.h:19 [inline] sb_start_intwrite include/linux/fs/super.h:177 [inline] ocfs2_start_trans+0x26b/0x6d0 fs/ocfs2/journal.c:367 ocfs2_remove_btree_range+0x7e2/0x1480 fs/ocfs2/alloc.c:5760 ocfs2_commit_truncate+0xbb4/0x22f0 fs/ocfs2/alloc.c:7374 ocfs2_truncate_for_delete fs/ocfs2/inode.c:701 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:868 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline] ocfs2_evict_inode+0x1111/0x4260 fs/ocfs2/inode.c:1299 evict+0x5ed/0xad0 fs/inode.c:846 filename_unlinkat+0x42d/0x5e0 fs/namei.c:5544 __do_sys_unlink fs/namei.c:5575 [inline] __se_sys_unlink+0x2e/0x140 fs/namei.c:5572 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x160/0xfc0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x4b/0x53 -> #0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_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+0x159d/0x2ce0 kernel/locking/lockdep.c:5237 lock_acquire+0xf1/0x2e0 kernel/locking/lockdep.c:5868 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_xattr_set+0xb12/0x1220 fs/ocfs2/xattr.c:3653 ocfs2_set_acl+0x701/0x7b0 fs/ocfs2/acl.c:255 ocfs2_iop_set_acl+0x1aa/0x2a0 fs/ocfs2/acl.c:287 set_posix_acl fs/posix_acl.c:955 [inline] vfs_set_acl+0x8f9/0xbf0 fs/posix_acl.c:1134 do_set_acl+0xf6/0x180 fs/posix_acl.c:1279 do_setxattr fs/xattr.c:633 [inline] filename_setxattr+0x2f4/0x610 fs/xattr.c:664 path_setxattrat+0x356/0x3a0 fs/xattr.c:708 __do_sys_lsetxattr fs/xattr.c:749 [inline] __se_sys_lsetxattr fs/xattr.c:745 [inline] __x64_sys_lsetxattr+0xbf/0xd0 fs/xattr.c:745 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x160/0xfc0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x4b/0x53 other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE] --> &journal->j_trans_barrier --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(&journal->j_trans_barrier); lock(&oi->ip_xattr_sem); lock(&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]); *** DEADLOCK *** 3 locks held by syz.2.3024/27235: #0: ffff8880637a2420 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff888062436d80 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #1: ffff888062436d80 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: vfs_set_acl+0x3af/0xbf0 fs/posix_acl.c:1115 #2: ffff888062436ab8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x42d/0x1220 fs/ocfs2/xattr.c:3614 stack backtrace: CPU: 0 UID: 0 PID: 27235 Comm: syz.2.3024 Tainted: G L 7.0.0-rc1 #1 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), 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+0x2dd/0x2f0 kernel/locking/lockdep.c:2043 check_noncircular+0x129/0x150 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+0x159d/0x2ce0 kernel/locking/lockdep.c:5237 lock_acquire+0xf1/0x2e0 kernel/locking/lockdep.c:5868 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_xattr_set+0xb12/0x1220 fs/ocfs2/xattr.c:3653 ocfs2_set_acl+0x701/0x7b0 fs/ocfs2/acl.c:255 ocfs2_iop_set_acl+0x1aa/0x2a0 fs/ocfs2/acl.c:287 set_posix_acl fs/posix_acl.c:955 [inline] vfs_set_acl+0x8f9/0xbf0 fs/posix_acl.c:1134 do_set_acl+0xf6/0x180 fs/posix_acl.c:1279 do_setxattr fs/xattr.c:633 [inline] filename_setxattr+0x2f4/0x610 fs/xattr.c:664 path_setxattrat+0x356/0x3a0 fs/xattr.c:708 __do_sys_lsetxattr fs/xattr.c:749 [inline] __se_sys_lsetxattr fs/xattr.c:745 [inline] __x64_sys_lsetxattr+0xbf/0xd0 fs/xattr.c:745 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x160/0xfc0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7f23845a3b6d Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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:00007f23827f6018 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007f2384815fa0 RCX: 00007f23845a3b6d RDX: 00002000000000c0 RSI: 0000200000000440 RDI: 0000200000000400 RBP: 00007f2384647c3e R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000005c R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2384816038 R14: 00007f2384815fa0 R15: 00007fff10fbf4c0 <<<<<<<<<<<<<<< tail report >>>>>>>>>>>>>>>