From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f207.google.com (mail-oi1-f207.google.com [209.85.167.207]) (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 BF9CD2BE7BE for ; Mon, 20 Jul 2026 05:05:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784523932; cv=none; b=ueWPrYoWwQUl+AcFMQeRln3mjzt0zsXwozQW65U/xnWOwF3bSJIj8IumJvSJgvRWtZJp70J6cNd+lgoBDqK5F61mCEsO3MiBXTVDcplqt2CdRZFF+SV6TFf3uOaq96Ar6XkvunY5WVSq7V59ubwkFPSBU5RpJ1qDLPug/KmEwdw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784523932; c=relaxed/simple; bh=DTzlw46JOp9QfhO6bRLkxGlX+wKJzzL+wlokw6vMaDg=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=KHEUV8h1JtY94+fuemFG9zJ2ob7K1+72Qh/Bn0dwAOquC5BUPWg0tDK5BuQoz1pyebWWumUpeeAZAlMZcukc7BMqQMyCqPOZbb6G40teNdDWtHwo9Lc2OeOOrWVhh4xxoikEtFSF+crSXTrUncfTfBhMUHWdPgt1VilwMXFrxHI= 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=209.85.167.207 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-oi1-f207.google.com with SMTP id 5614622812f47-4a416619e8dso6448851b6e.1 for ; Sun, 19 Jul 2026 22:05:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784523929; x=1785128729; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=KjXPbr6uMxu8UuAHcTYH1k4cPiBqMaTG/m9nKuj0+Y0=; b=stVNDMvlQ/36gkyy7l2vIUQm/+q+l9S9b1jDmCdrPTSLVp47VDy8yjBEYjqvhDjLUh xlp9ig/hCEL9FCS1MIzjHB28Fhrh7g89XsEQ9UZ1cqpUX/Rc1FYBh3qfnjJ6ZCh6xcRp /+rzVcqO4wsCdOGUa+p/qZ7MEuQlHaHIqCZ9lxLlBWNWKKfcFHxVbZACDJFXe243vkVC 1OsdlNld5V/DtY3ajBCykIzOmppHiWNkU37Pccm8P/KLtxJ9HcjS+FRNs8vFlsoA2quJ aYv+DB18px0sHJ+K4EeUTR4BQidBWC8w7Vq9ucfNJkupRitl2B6YjjwzPcXqQNgH6+yM mbvA== X-Forwarded-Encrypted: i=1; AHgh+RojvDdiMfTkfMN3BeK+hLRdpk3F6YYhVmfMemYXOVDhT4EXI6UPTO8BTZeknWC6cKS6hpnj5XaIZ+5Y2g==@lists.linux.dev X-Gm-Message-State: AOJu0Yx2IuDjmt92YviMyrlQgL8eYW8H6PLFt1V/WOXA23zEQLxofcc1 WgRv4a3OCxgcdOwxZk+5HkWm1CkJr2EZBjTF4zTxIcASXymNs+UjSJRlmeKQP6kOBPKxi5BW7Fi OQ1Kjy6jyttqYxRx5TcUC+8EkJtaNwlO2L49WVDyfEu3yceBsap05StvnBUs= Precedence: bulk X-Mailing-List: ocfs2-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:2388:b0:495:2580:2974 with SMTP id 5614622812f47-4a4b23d64a4mr10366548b6e.30.1784523929606; Sun, 19 Jul 2026 22:05:29 -0700 (PDT) Date: Sun, 19 Jul 2026 22:05:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a5dac99.42649fcc.6186.007f.GAE@google.com> Subject: [syzbot] [ocfs2?] possible deadlock in ocfs2_evict_inode (2) 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: 58717b2a1365 Merge tag 'sound-7.2-rc4' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=100354b9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=20c9876b0f77b546 dashboard link: https://syzkaller.appspot.com/bug?extid=99ed7f9e22e83c1eaea1 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 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-58717b2a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c55a804d84b6/vmlinux-58717b2a.xz kernel image: https://storage.googleapis.com/syzbot-assets/9e654c04764e/bzImage-58717b2a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+99ed7f9e22e83c1eaea1@syzkaller.appspotmail.com ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ kswapd0/70 is trying to acquire lock: ffff8880444617a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] ffff8880444617a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_inode fs/ocfs2/inode.c:767 [inline] ffff8880444617a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline] ffff8880444617a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] ffff8880444617a0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0x1489/0x4390 fs/ocfs2/inode.c:1333 but task is already holding lock: ffff8880444633a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] ffff8880444633a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:888 [inline] ffff8880444633a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] ffff8880444633a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0xe39/0x4390 fs/ocfs2/inode.c:1333 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x96/0x200 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:888 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] ocfs2_evict_inode+0xe39/0x4390 fs/ocfs2/inode.c:1333 evict+0x624/0xb50 fs/inode.c:825 ocfs2_dentry_iput+0x24d/0x390 fs/ocfs2/dcache.c:407 dentry_kill+0x1b9/0x880 fs/dcache.c:826 shrink_kill fs/dcache.c:1275 [inline] shrink_dentry_list+0x209/0x310 fs/dcache.c:1292 prune_dcache_sb+0x119/0x180 fs/dcache.c:1374 super_cache_scan+0x35c/0x4a0 fs/super.c:223 do_shrink_slab+0x6d0/0x10e0 mm/shrinker.c:443 shrink_slab_memcg mm/shrinker.c:560 [inline] shrink_slab+0x838/0x1220 mm/shrinker.c:638 shrink_one+0x2a2/0x730 mm/vmscan.c:5026 shrink_many mm/vmscan.c:5087 [inline] lru_gen_shrink_node mm/vmscan.c:5165 [inline] shrink_node+0x3303/0x3b60 mm/vmscan.c:6154 kswapd_shrink_node mm/vmscan.c:7008 [inline] balance_pgdat mm/vmscan.c:7186 [inline] kswapd+0x17b6/0x31c0 mm/vmscan.c:7462 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #2 (&osb->nfs_sync_rwlock){.+.+}-{4:4}: down_read+0x4a/0x330 kernel/locking/rwsem.c:1574 ocfs2_nfs_sync_lock+0x106/0x270 fs/ocfs2/dlmglue.c:2875 ocfs2_delete_inode fs/ocfs2/inode.c:1142 [inline] ocfs2_evict_inode+0x3a6/0x4390 fs/ocfs2/inode.c:1333 evict+0x624/0xb50 fs/inode.c:825 ocfs2_dentry_iput+0x24d/0x390 fs/ocfs2/dcache.c:407 dentry_kill+0x1b9/0x880 fs/dcache.c:826 shrink_kill fs/dcache.c:1275 [inline] shrink_dentry_list+0x209/0x310 fs/dcache.c:1292 prune_dcache_sb+0x119/0x180 fs/dcache.c:1374 super_cache_scan+0x35c/0x4a0 fs/super.c:223 do_shrink_slab+0x6d0/0x10e0 mm/shrinker.c:443 shrink_slab_memcg mm/shrinker.c:560 [inline] shrink_slab+0x838/0x1220 mm/shrinker.c:638 shrink_one+0x2a2/0x730 mm/vmscan.c:5026 shrink_many mm/vmscan.c:5087 [inline] lru_gen_shrink_node mm/vmscan.c:5165 [inline] shrink_node+0x3303/0x3b60 mm/vmscan.c:6154 kswapd_shrink_node mm/vmscan.c:7008 [inline] balance_pgdat mm/vmscan.c:7186 [inline] kswapd+0x17b6/0x31c0 mm/vmscan.c:7462 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #1 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:4329 [inline] fs_reclaim_acquire+0x71/0x100 mm/page_alloc.c:4343 might_alloc include/linux/sched/mm.h:317 [inline] slab_pre_alloc_hook mm/slub.c:4565 [inline] slab_alloc_node mm/slub.c:4925 [inline] __kmalloc_cache_noprof+0x61/0x660 mm/slub.c:5511 _kmalloc_noprof include/linux/slab.h:969 [inline] _kzalloc_noprof include/linux/slab.h:1290 [inline] ocfs2_reserve_new_metadata_blocks+0x10c/0x9a0 fs/ocfs2/suballoc.c:1084 ocfs2_mknod+0x10e1/0x2240 fs/ocfs2/namei.c:351 ocfs2_mkdir+0x181/0x460 fs/ocfs2/namei.c:660 vfs_mkdir+0x406/0x620 fs/namei.c:5276 filename_mkdirat+0x285/0x510 fs/namei.c:5309 __do_sys_mkdirat fs/namei.c:5330 [inline] __se_sys_mkdirat+0x35/0x150 fs/namei.c:5327 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[INODE_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+0x1520/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 down_write+0x96/0x200 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] ocfs2_remove_inode fs/ocfs2/inode.c:767 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] ocfs2_evict_inode+0x1489/0x4390 fs/ocfs2/inode.c:1333 evict+0x624/0xb50 fs/inode.c:825 ocfs2_dentry_iput+0x24d/0x390 fs/ocfs2/dcache.c:407 dentry_kill+0x1b9/0x880 fs/dcache.c:826 shrink_kill fs/dcache.c:1275 [inline] shrink_dentry_list+0x209/0x310 fs/dcache.c:1292 prune_dcache_sb+0x119/0x180 fs/dcache.c:1374 super_cache_scan+0x35c/0x4a0 fs/super.c:223 do_shrink_slab+0x6d0/0x10e0 mm/shrinker.c:443 shrink_slab_memcg mm/shrinker.c:560 [inline] shrink_slab+0x838/0x1220 mm/shrinker.c:638 shrink_one+0x2a2/0x730 mm/vmscan.c:5026 shrink_many mm/vmscan.c:5087 [inline] lru_gen_shrink_node mm/vmscan.c:5165 [inline] shrink_node+0x3303/0x3b60 mm/vmscan.c:6154 kswapd_shrink_node mm/vmscan.c:7008 [inline] balance_pgdat mm/vmscan.c:7186 [inline] kswapd+0x17b6/0x31c0 mm/vmscan.c:7462 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE] --> &osb->nfs_sync_rwlock --> &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]); lock(&osb->nfs_sync_rwlock); lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]); lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]); *** DEADLOCK *** 4 locks held by kswapd0/70: #0: ffffffff8ec86cc0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat mm/vmscan.c:7084 [inline] #0: ffffffff8ec86cc0 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0x9b6/0x31c0 mm/vmscan.c:7462 #1: ffff88803236c0d8 (&type->s_umount_key#53){.+.+}-{4:4}, at: super_trylock_shared fs/super.c:566 [inline] #1: ffff88803236c0d8 (&type->s_umount_key#53){.+.+}-{4:4}, at: super_cache_scan+0x91/0x4a0 fs/super.c:198 #2: ffff888012bb4bc0 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0x106/0x270 fs/ocfs2/dlmglue.c:2875 #3: ffff8880444633a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #3: ffff8880444633a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:888 [inline] #3: ffff8880444633a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] #3: ffff8880444633a0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0xe39/0x4390 fs/ocfs2/inode.c:1333 stack backtrace: CPU: 0 UID: 0 PID: 70 Comm: kswapd0 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+0x1520/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 down_write+0x96/0x200 kernel/locking/rwsem.c:1631 inode_lock include/linux/fs.h:1024 [inline] ocfs2_remove_inode fs/ocfs2/inode.c:767 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline] ocfs2_evict_inode+0x1489/0x4390 fs/ocfs2/inode.c:1333 evict+0x624/0xb50 fs/inode.c:825 ocfs2_dentry_iput+0x24d/0x390 fs/ocfs2/dcache.c:407 dentry_kill+0x1b9/0x880 fs/dcache.c:826 shrink_kill fs/dcache.c:1275 [inline] shrink_dentry_list+0x209/0x310 fs/dcache.c:1292 prune_dcache_sb+0x119/0x180 fs/dcache.c:1374 super_cache_scan+0x35c/0x4a0 fs/super.c:223 do_shrink_slab+0x6d0/0x10e0 mm/shrinker.c:443 shrink_slab_memcg mm/shrinker.c:560 [inline] shrink_slab+0x838/0x1220 mm/shrinker.c:638 shrink_one+0x2a2/0x730 mm/vmscan.c:5026 shrink_many mm/vmscan.c:5087 [inline] lru_gen_shrink_node mm/vmscan.c:5165 [inline] shrink_node+0x3303/0x3b60 mm/vmscan.c:6154 kswapd_shrink_node mm/vmscan.c:7008 [inline] balance_pgdat mm/vmscan.c:7186 [inline] kswapd+0x17b6/0x31c0 mm/vmscan.c:7462 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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 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