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 94DC114F10C for ; Mon, 22 Apr 2024 15:24:35 +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=1713799477; cv=none; b=E3vxJxZbkoGnXzB+OtLFKN/ggoRlbUm7SMgYSh1PNqV4gMN6GAHCB9gIlmyDsKEzGxge8O/nt4Xj1qDDr3YI5KjD3vyMojfYG0zQsYLe3YAqJZqYDs9Q49MsdgSn7mB9rQCHwTRixNPm4TyO4JTSTubpi4E+MgM44wgaYilLZXo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713799477; c=relaxed/simple; bh=wtU1V2qBYhrcZoyYgVqxeMt6QBiWQdSn1ZxPDdaKx7g=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=E9muxTzPnkvdHST/1O7d5wVBgkuN0hLquU/IM5GkXthK4niv42GcZkA1w4WUd3pj6wOHVuzdr3+UmEPrdLsgYAIZIVhy/vqENpwcYAehghaCw/BJUJANgzuDyQSQlipH53o0SVEnSRLVODTYPDzHu8arUY3v8xPfVS2FHxVKX2s= 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-7da7d4ccb67so304531439f.0 for ; Mon, 22 Apr 2024 08:24:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1713799475; x=1714404275; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=dHtHnTi6FxG4AKp2BrDxT0ps7y/v6TGifGe1GDJVlwI=; b=qP/j2ojk6tUmv/7pR+n507BpZHwRM+l+WULjB/Y65VdRjw5LPwIHwet78s4zLrh1hc SHKum/qwNXs1uMUo0lABGhJWR2PMw2mDJB8L+rpjGE7d5DD6/5I0tW/MIxraAUAQYeHz dMxQG0zMHiAQcNqiJTTwVaKu0Qt+sJ3UibrKu00gq8vwLYR5GHu51jkogJnj+PPem5ah PgPbBA8Y7kiuLCTIr+bE6SMZcdOUGa47gTVaaWJsrY1u6w029RnUUvQy7Qt8wbxxJt5W OyOrCazaeqWIyqlSBT0suxwEUEqDIME+n5hbDKX99p2ewBOBwqA/No0vl/X5c0qze4SW oC+g== X-Forwarded-Encrypted: i=1; AJvYcCVw69JUNo1U+K3GXD1UOepJHzC6AsZSv60DMISI6CaWCUOtGmPm/59Tsm9bcGxQatRmX4SWkTMMB5nDaRJr4e8josDex70HXXp8UGp7 X-Gm-Message-State: AOJu0YxQtARFhg2TXZvvsUYO5cDB5uW34FsX4G40C+a0h2oxW7aonKxY 2+2bvZh7eDFU98pLm6bRN7Me5a593KQ4V7yIz/SSOtMf/WpYUyA7uRYYfQcqnLbJsSKDOel136/ N77Stv8SQwqsGnF0YmUKnAXjOYxVRPHAHG76B6bgotJEnLJqILN6TGAc= X-Google-Smtp-Source: AGHT+IGl6Ue9oyreAaIvve6ID07ZW18+KQQqr5hGPCdua2O7ZOqSiTjhF1+00xDTdCOgttfxHkYDUS9utudEzi4T5cRATUgjkqaJ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:1683:b0:485:65de:892 with SMTP id f3-20020a056638168300b0048565de0892mr60509jat.5.1713799474811; Mon, 22 Apr 2024 08:24:34 -0700 (PDT) Date: Mon, 22 Apr 2024 08:24:34 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e9a7c40616b108ba@google.com> Subject: [syzbot] [jfs?] possible deadlock in diFree From: syzbot To: jfs-discussion@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, shaggy@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 8cd26fd90c1a Merge tag 'for-6.9-rc4-tag' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17246653180000 kernel config: https://syzkaller.appspot.com/x/.config?x=2dc5adfa93a8cfac dashboard link: https://syzkaller.appspot.com/bug?extid=ff2b5414e8547b96ad2e compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 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-8cd26fd9.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7f65e88496b8/vmlinux-8cd26fd9.xz kernel image: https://storage.googleapis.com/syzbot-assets/cc0f0ec3d904/bzImage-8cd26fd9.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ff2b5414e8547b96ad2e@syzkaller.appspotmail.com ====================================================== WARNING: possible circular locking dependency detected 6.9.0-rc4-syzkaller-00038-g8cd26fd90c1a #0 Not tainted ------------------------------------------------------ kswapd0/111 is trying to acquire lock: ffff88801e3e8920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2ff/0x2770 fs/jfs/jfs_imap.c:886 but task is already holding lock: ffffffff8d9373c0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x166/0x1a10 mm/vmscan.c:6782 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:3698 [inline] fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3712 might_alloc include/linux/sched/mm.h:312 [inline] prepare_alloc_pages.constprop.0+0x155/0x560 mm/page_alloc.c:4346 __alloc_pages+0x194/0x2460 mm/page_alloc.c:4564 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] __kmalloc_large_node+0x7f/0x1a0 mm/slub.c:3911 kmalloc_large+0x1c/0x70 mm/slub.c:3928 kmalloc include/linux/slab.h:625 [inline] diMount+0x29/0x8d0 fs/jfs/jfs_imap.c:105 jfs_mount_rw+0x238/0x700 fs/jfs/jfs_mount.c:240 jfs_remount+0x51f/0x650 fs/jfs/super.c:454 legacy_reconfigure+0x119/0x180 fs/fs_context.c:685 reconfigure_super+0x44f/0xb20 fs/super.c:1071 vfs_cmd_reconfigure fs/fsopen.c:267 [inline] vfs_fsconfig_locked fs/fsopen.c:296 [inline] __do_sys_fsconfig+0x991/0xb90 fs/fsopen.c:476 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x84/0x8e -> #1 (&jfs_ip->rdwrlock/1){++++}-{3:3}: down_read_nested+0x9e/0x330 kernel/locking/rwsem.c:1651 diAlloc+0x3ea/0x1a70 fs/jfs/jfs_imap.c:1385 ialloc+0x84/0x9e0 fs/jfs/jfs_inode.c:56 jfs_create+0x23e/0xb40 fs/jfs/namei.c:92 lookup_open.isra.0+0x10a1/0x13c0 fs/namei.c:3497 open_last_lookups fs/namei.c:3566 [inline] path_openat+0x92f/0x2990 fs/namei.c:3796 do_filp_open+0x1dc/0x430 fs/namei.c:3826 do_sys_openat2+0x17a/0x1e0 fs/open.c:1406 do_sys_open fs/open.c:1421 [inline] __do_compat_sys_openat fs/open.c:1481 [inline] __se_compat_sys_openat fs/open.c:1479 [inline] __ia32_compat_sys_openat+0x16e/0x210 fs/open.c:1479 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:346 entry_SYSENTER_compat_after_hwframe+0x84/0x8e -> #0 (&(imap->im_aglock[index])){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 diFree+0x2ff/0x2770 fs/jfs/jfs_imap.c:886 jfs_evict_inode+0x3d4/0x4b0 fs/jfs/inode.c:156 evict+0x2ed/0x6c0 fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 dentry_unlink_inode+0x295/0x440 fs/dcache.c:400 __dentry_kill+0x1d0/0x600 fs/dcache.c:603 shrink_kill fs/dcache.c:1048 [inline] shrink_dentry_list+0x140/0x5d0 fs/dcache.c:1075 prune_dcache_sb+0xeb/0x150 fs/dcache.c:1156 super_cache_scan+0x32a/0x550 fs/super.c:221 do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0xa87/0x1310 mm/shrinker.c:626 shrink_one+0x493/0x7c0 mm/vmscan.c:4774 shrink_many mm/vmscan.c:4835 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4935 shrink_node mm/vmscan.c:5894 [inline] kswapd_shrink_node mm/vmscan.c:6704 [inline] balance_pgdat+0x10d1/0x1a10 mm/vmscan.c:6895 kswapd+0x5ea/0xbf0 mm/vmscan.c:7164 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 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: &(imap->im_aglock[index]) --> &jfs_ip->rdwrlock/1 --> fs_reclaim Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(fs_reclaim); lock(&jfs_ip->rdwrlock/1); lock(fs_reclaim); lock(&(imap->im_aglock[index])); *** DEADLOCK *** 2 locks held by kswapd0/111: #0: ffffffff8d9373c0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x166/0x1a10 mm/vmscan.c:6782 #1: ffff88804a6d80e0 (&type->s_umount_key#65){++++}-{3:3}, at: super_trylock_shared fs/super.c:561 [inline] #1: ffff88804a6d80e0 (&type->s_umount_key#65){++++}-{3:3}, at: super_cache_scan+0x96/0x550 fs/super.c:196 stack backtrace: CPU: 3 PID: 111 Comm: kswapd0 Not tainted 6.9.0-rc4-syzkaller-00038-g8cd26fd90c1a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 diFree+0x2ff/0x2770 fs/jfs/jfs_imap.c:886 jfs_evict_inode+0x3d4/0x4b0 fs/jfs/inode.c:156 evict+0x2ed/0x6c0 fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 dentry_unlink_inode+0x295/0x440 fs/dcache.c:400 __dentry_kill+0x1d0/0x600 fs/dcache.c:603 shrink_kill fs/dcache.c:1048 [inline] shrink_dentry_list+0x140/0x5d0 fs/dcache.c:1075 prune_dcache_sb+0xeb/0x150 fs/dcache.c:1156 super_cache_scan+0x32a/0x550 fs/super.c:221 do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0xa87/0x1310 mm/shrinker.c:626 shrink_one+0x493/0x7c0 mm/vmscan.c:4774 shrink_many mm/vmscan.c:4835 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4935 shrink_node mm/vmscan.c:5894 [inline] kswapd_shrink_node mm/vmscan.c:6704 [inline] balance_pgdat+0x10d1/0x1a10 mm/vmscan.c:6895 kswapd+0x5ea/0xbf0 mm/vmscan.c:7164 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 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