From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (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 2DB6913210D for ; Sun, 18 Aug 2024 23:22:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724023343; cv=none; b=HxwwcWMUinrzKLe2Vk5BEh4qBiF4VnJ/bzKaXogJ54TbsKAan+OwGBU2Ut8NX2HDRZKGu93OpPxzPJFZkr+fB9/1WQFg+IE+BUXFnbPfpgRjWNhlIEBejnUigcSHn0dpal4lCgtYMyLlO4qOlN/U0kZ2PE41g9RodCu8GAUnDNs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724023343; c=relaxed/simple; bh=BH2BMr4GHTwNAt3MET8S0hR8r4nrj5DypS0AqXAJ0js=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=EXYGSmZEAuXxEOBefIjj0bFZNEvy8P9QWP4t8Q331Cb3f5NpT23x4T1rvosFeAvnqLGmbUrQtPWpe8+hci4XO+/srNJ/EGnEqVIM/ja8rpozyMHIYOPLRwrNDczUAlF+d8VMJlbw8DNVLb8P3oR1PU7GdtZertGdQwTszJ6RFsU= 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=209.85.166.71 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-io1-f71.google.com with SMTP id ca18e2360f4ac-824cad19812so366242439f.1 for ; Sun, 18 Aug 2024 16:22:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724023341; x=1724628141; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=cFETBmQxO3AboMC0uEMbJaW2odUMVjwePpXJQCbblJ4=; b=hrU0n6lO8VikmvscbrA70xshM87SKK5/j9EdlwSArZTiAC06emneEvNqDb2luMvjOm n7n5BWwUpykP8JtqIXrlq26L5l1J4Li0ebQcKJyuuL5xF4cuHPfnm5U/kXzsJ40oPGE9 XEo/jR2p4aKaa5PCoNFlaNNDI1NK8hxK9Kxb/z4Pm2ypEAvn3ta7zpwwc1vR7R5iSOrd RBIRn7//AfAF/i350D6efGYCdNOSorT1bQpUF/wcIYdM1StEwiI3PrN9EvMSokQE0+K+ H8PPvO+vXrYcUa2V5Z8N6+l2z0bUm1V5tDgn9uUnuXsPLO6jI2eLIXmqnXuxumAKQTPh 9sLw== X-Forwarded-Encrypted: i=1; AJvYcCWCuSK1O9JoeZlBdM4UR0nqgw/f0A44aLiMmPYquLG0ZWIgKiWLEkAZunls3mPUJi3UbFqSeH8nV1IeAeZ3HcT39mD2rZPYdLwYDMtF X-Gm-Message-State: AOJu0YzPAn1kLwgqgL0g8D7QRI5IIz5EFEj51Zqv8cSozJiIa6yDAtNN bjX2QcetVlOfSdy/t2qGjR0LOHIF0b8NjWLIxslaBoY1OvNwoEPpuZdzI9BSUZM4D+FV2H2o43Q drC3VF+1pD8H1qslmQebB1L4aX9C8USC0LVwokBumzZ+Lskn5UBqsYg4= X-Google-Smtp-Source: AGHT+IGxEP1urpslxP2JwDwSUMDLDWicgTGmKzsmu9Pq39vz2ZwyPyWLwuA0ErVTSEoGSJGVJn8d2wmFaQixQ9AD2vaZBUSy30Xn Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:2cc3:b0:81f:904a:51b1 with SMTP id ca18e2360f4ac-8250f4bf8acmr10368039f.1.1724023341305; Sun, 18 Aug 2024 16:22:21 -0700 (PDT) Date: Sun, 18 Aug 2024 16:22:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d7e279061ffd7610@google.com> Subject: [syzbot] [ocfs2?] possible deadlock in ocfs2_evict_inode 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: d7a5aa4b3c00 Merge tag 'perf-tools-fixes-for-v6.11-2024-08.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10490ad5980000 kernel config: https://syzkaller.appspot.com/x/.config?x=7229118d88b4a71b dashboard link: https://syzkaller.appspot.com/bug?extid=b225d4dfce6219600c42 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-d7a5aa4b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/af15738cca6c/vmlinux-d7a5aa4b.xz kernel image: https://storage.googleapis.com/syzbot-assets/62dacb1384ee/bzImage-d7a5aa4b.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b225d4dfce6219600c42@syzkaller.appspotmail.com ====================================================== WARNING: possible circular locking dependency detected 6.11.0-rc3-syzkaller-00156-gd7a5aa4b3c00 #0 Not tainted ------------------------------------------------------ kswapd0/78 is trying to acquire lock: ffff888011f589c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] ffff888011f589c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_remove_inode fs/ocfs2/inode.c:655 [inline] ffff888011f589c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:818 [inline] ffff888011f589c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] ffff888011f589c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_evict_inode+0x209f/0x4680 fs/ocfs2/inode.c:1216 but task is already holding lock: ffff88803a3f5f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] ffff88803a3f5f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:776 [inline] ffff88803a3f5f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] ffff88803a3f5f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_evict_inode+0x1b17/0x4680 fs/ocfs2/inode.c:1216 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 down_write+0x99/0x220 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:799 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:776 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] ocfs2_evict_inode+0x1b17/0x4680 fs/ocfs2/inode.c:1216 evict+0x532/0x950 fs/inode.c:704 ocfs2_dentry_iput+0x232/0x380 fs/ocfs2/dcache.c:411 __dentry_kill+0x20d/0x630 fs/dcache.c:610 shrink_kill+0xa9/0x2c0 fs/dcache.c:1055 shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1082 prune_dcache_sb+0x10f/0x180 fs/dcache.c:1163 super_cache_scan+0x34f/0x4b0 fs/super.c:221 do_shrink_slab+0x701/0x1160 mm/shrinker.c:435 shrink_slab+0x1093/0x14d0 mm/shrinker.c:662 shrink_one+0x43b/0x850 mm/vmscan.c:4815 shrink_many mm/vmscan.c:4876 [inline] lru_gen_shrink_node mm/vmscan.c:4954 [inline] shrink_node+0x3799/0x3de0 mm/vmscan.c:5934 kswapd_shrink_node mm/vmscan.c:6762 [inline] balance_pgdat mm/vmscan.c:6954 [inline] kswapd+0x1bcd/0x35a0 mm/vmscan.c:7223 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #2 (&osb->nfs_sync_rwlock){.+.+}-{3:3}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1526 ocfs2_nfs_sync_lock+0x109/0x260 fs/ocfs2/dlmglue.c:2876 ocfs2_delete_inode fs/ocfs2/inode.c:1030 [inline] ocfs2_evict_inode+0x3e5/0x4680 fs/ocfs2/inode.c:1216 evict+0x532/0x950 fs/inode.c:704 ocfs2_dentry_iput+0x232/0x380 fs/ocfs2/dcache.c:411 __dentry_kill+0x20d/0x630 fs/dcache.c:610 shrink_kill+0xa9/0x2c0 fs/dcache.c:1055 shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1082 prune_dcache_sb+0x10f/0x180 fs/dcache.c:1163 super_cache_scan+0x34f/0x4b0 fs/super.c:221 do_shrink_slab+0x701/0x1160 mm/shrinker.c:435 shrink_slab+0x1093/0x14d0 mm/shrinker.c:662 shrink_one+0x43b/0x850 mm/vmscan.c:4815 shrink_many mm/vmscan.c:4876 [inline] lru_gen_shrink_node mm/vmscan.c:4954 [inline] shrink_node+0x3799/0x3de0 mm/vmscan.c:5934 kswapd_shrink_node mm/vmscan.c:6762 [inline] balance_pgdat mm/vmscan.c:6954 [inline] kswapd+0x1bcd/0x35a0 mm/vmscan.c:7223 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #1 (fs_reclaim){+.+.}-{0:0}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 __fs_reclaim_acquire mm/page_alloc.c:3823 [inline] fs_reclaim_acquire+0x88/0x140 mm/page_alloc.c:3837 might_alloc include/linux/sched/mm.h:334 [inline] slab_pre_alloc_hook mm/slub.c:3939 [inline] slab_alloc_node mm/slub.c:4017 [inline] __kmalloc_cache_noprof+0x3d/0x2c0 mm/slub.c:4184 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] ocfs2_reserve_new_metadata_blocks+0x117/0x9c0 fs/ocfs2/suballoc.c:966 ocfs2_mknod+0x143a/0x2b40 fs/ocfs2/namei.c:345 ocfs2_mkdir+0x1ab/0x480 fs/ocfs2/namei.c:655 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4210 do_mkdirat+0x264/0x3a0 fs/namei.c:4233 __do_sys_mkdirat fs/namei.c:4248 [inline] __se_sys_mkdirat fs/namei.c:4246 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4246 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3133 [inline] check_prevs_add kernel/locking/lockdep.c:3252 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 down_write+0x99/0x220 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:799 [inline] ocfs2_remove_inode fs/ocfs2/inode.c:655 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:818 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] ocfs2_evict_inode+0x209f/0x4680 fs/ocfs2/inode.c:1216 evict+0x532/0x950 fs/inode.c:704 ocfs2_dentry_iput+0x232/0x380 fs/ocfs2/dcache.c:411 __dentry_kill+0x20d/0x630 fs/dcache.c:610 shrink_kill+0xa9/0x2c0 fs/dcache.c:1055 shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1082 prune_dcache_sb+0x10f/0x180 fs/dcache.c:1163 super_cache_scan+0x34f/0x4b0 fs/super.c:221 do_shrink_slab+0x701/0x1160 mm/shrinker.c:435 shrink_slab+0x1093/0x14d0 mm/shrinker.c:662 shrink_one+0x43b/0x850 mm/vmscan.c:4815 shrink_many mm/vmscan.c:4876 [inline] lru_gen_shrink_node mm/vmscan.c:4954 [inline] shrink_node+0x3799/0x3de0 mm/vmscan.c:5934 kswapd_shrink_node mm/vmscan.c:6762 [inline] balance_pgdat mm/vmscan.c:6954 [inline] kswapd+0x1bcd/0x35a0 mm/vmscan.c:7223 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2 --> &osb->nfs_sync_rwlock --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type] Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]); lock(&osb->nfs_sync_rwlock); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2); *** DEADLOCK *** 4 locks held by kswapd0/78: #0: ffffffff8ea2fce0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat mm/vmscan.c:6841 [inline] #0: ffffffff8ea2fce0 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0xbb4/0x35a0 mm/vmscan.c:7223 #1: ffff8880460f20e0 (&type->s_umount_key#47){.+.+}-{3:3}, at: super_trylock_shared fs/super.c:562 [inline] #1: ffff8880460f20e0 (&type->s_umount_key#47){.+.+}-{3:3}, at: super_cache_scan+0x94/0x4b0 fs/super.c:196 #2: ffff88803b050bd0 (&osb->nfs_sync_rwlock){.+.+}-{3:3}, at: ocfs2_nfs_sync_lock+0x109/0x260 fs/ocfs2/dlmglue.c:2876 #3: ffff88803a3f5f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] #3: ffff88803a3f5f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:776 [inline] #3: ffff88803a3f5f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] #3: ffff88803a3f5f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_evict_inode+0x1b17/0x4680 fs/ocfs2/inode.c:1216 stack backtrace: CPU: 0 UID: 0 PID: 78 Comm: kswapd0 Not tainted 6.11.0-rc3-syzkaller-00156-gd7a5aa4b3c00 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2186 check_prev_add kernel/locking/lockdep.c:3133 [inline] check_prevs_add kernel/locking/lockdep.c:3252 [inline] validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 down_write+0x99/0x220 kernel/locking/rwsem.c:1579 inode_lock include/linux/fs.h:799 [inline] ocfs2_remove_inode fs/ocfs2/inode.c:655 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:818 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline] ocfs2_evict_inode+0x209f/0x4680 fs/ocfs2/inode.c:1216 evict+0x532/0x950 fs/inode.c:704 ocfs2_dentry_iput+0x232/0x380 fs/ocfs2/dcache.c:411 __dentry_kill+0x20d/0x630 fs/dcache.c:610 shrink_kill+0xa9/0x2c0 fs/dcache.c:1055 shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1082 prune_dcache_sb+0x10f/0x180 fs/dcache.c:1163 super_cache_scan+0x34f/0x4b0 fs/super.c:221 do_shrink_slab+0x701/0x1160 mm/shrinker.c:435 shrink_slab+0x1093/0x14d0 mm/shrinker.c:662 shrink_one+0x43b/0x850 mm/vmscan.c:4815 shrink_many mm/vmscan.c:4876 [inline] lru_gen_shrink_node mm/vmscan.c:4954 [inline] shrink_node+0x3799/0x3de0 mm/vmscan.c:5934 kswapd_shrink_node mm/vmscan.c:6762 [inline] balance_pgdat mm/vmscan.c:6954 [inline] kswapd+0x1bcd/0x35a0 mm/vmscan.c:7223 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 --- 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