From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f207.google.com (mail-il1-f207.google.com [209.85.166.207]) (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 B828849646 for ; Tue, 25 Jun 2024 02:53:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719284006; cv=none; b=iqZC4NlaUUv75jIxlaC1QKyusj1Ztlx1pkKvzgpjghTJ0WGVnB9LuM0VC7qVDe9w8BXOXwPe2iIRwNzDmpgYzc2/k/p6K+7Wcc/nW8+bjw+XeWjxzUtgncPW3oMEz/0onaklWfhzujKN40Yj1Pj95sIPN7ROyWxmH0h/g0maWAA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719284006; c=relaxed/simple; bh=S7+gfm4d4iNVGs0RhSA8T413pRdFnjgMne0Asyf/u+0=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=spKecTPpOBkbglm/tGktUk/Y95IsZG4YmwbWaxqSYvc7Ppc2aAJsnqqikdpJApUtecEE+idm8/NpzxbMFU5xJWlDrfruB9fzpFMsxlC/vbtnl9awCnRNe1JynWOkmy/W7M5ElND9+QO+kiL6g4GN14oPZ0sZjOAUjCfoTJULWr8= 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=209.85.166.207 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-il1-f207.google.com with SMTP id e9e14a558f8ab-3737b3ae019so62470645ab.2 for ; Mon, 24 Jun 2024 19:53:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1719284004; x=1719888804; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=kP+P6RJcUraw7F4CvjY12yZNpRMlORe3aYPwCWneHec=; b=ZBLlDNyXZ8Dq1lYFX8P2HpjmgiUmjJD0eEzNq1mpSr8sYYYQRv52ZmGIcUVyu8W4/N PQQFcYD2QmNyQ2yK/wbqV1PDYAov19rMCDFnROe0tQqm8s/Fa5hYPsXLVxT4Azt5gRg1 R5R8khnitky1SeQk2b0otjRwBlLV0Dy8vquqrCppimp56actTUynD/UyLQFhARgUSbVl RIQwjAuF7vEJSw3UG9VI6P984AneZigMdMSKdydF9Yb9aRO2xXrBHGfjNDnFZIv4z5v4 Yw8D40rdKi1ZMdfwJy7IB3m4f4KdMgEck/5QQBxK0wRQw1kVcoNEpBGyRXipohoq7SFS NuLw== X-Forwarded-Encrypted: i=1; AJvYcCUyBU1usz/HJCT4FckCn7CGqu4rcLRfStN6RTf+Wq9ptaF1tkusi+ofvM1qrPswQoYKme0O/lOsNjr9Zf1fQldAHOjY/F+H7ENqkWMz X-Gm-Message-State: AOJu0YzHWDzsdAyE5WhdvYnLb9rSw61XNA52guyyKr9lwniaKvFFACf7 7WhGoyB96kzmWxTaHNU0LLzwk/oruJBg6Q9i8joajNSqPehnszOcOI+6q+e4DE9egO/zhE/FfYE 3Rphzh28GAUqwYzOlJVrL+VlM/NlwL71T4NnaSBeDpERQoAfxzNmfky0= X-Google-Smtp-Source: AGHT+IE3vwI0DzChUs9N++W+hrM+DaKAH0FtMM0xQyI3sbD52/1IrnaqUMXWniAvRU7FzFLAqZNk0ZOgndtzrkLHs1R7+N+sruPg Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:b21:b0:374:a021:f1b2 with SMTP id e9e14a558f8ab-3763f7424b5mr4915975ab.5.1719284003905; Mon, 24 Jun 2024 19:53:23 -0700 (PDT) Date: Mon, 24 Jun 2024 19:53:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000523442061bae0072@google.com> Subject: [syzbot] [jfs?] possible deadlock in jfs_create From: syzbot To: jfs-discussion@lists.sourceforge.net, 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: 50736169ecc8 Merge tag 'for-6.10-rc4-tag' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14c0d08e980000 kernel config: https://syzkaller.appspot.com/x/.config?x=d24262d81a9225c6 dashboard link: https://syzkaller.appspot.com/bug?extid=bdacb5fa2bf85deafea9 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-50736169.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c6c00759502a/vmlinux-50736169.xz kernel image: https://storage.googleapis.com/syzbot-assets/c94681a1aaa3/bzImage-50736169.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+bdacb5fa2bf85deafea9@syzkaller.appspotmail.com loop2: detected capacity change from 0 to 32768 ====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc4-syzkaller-00148-g50736169ecc8 #0 Not tainted ------------------------------------------------------ syz-executor.2/9183 is trying to acquire lock: ffff88804c874288 (&jfs_ip->commit_mutex/1){+.+.}-{3:3}, at: jfs_create+0x2c3/0xb40 fs/jfs/namei.c:101 but task is already holding lock: ffff88804c873948 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_create+0x2a7/0xb40 fs/jfs/namei.c:100 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (&jfs_ip->commit_mutex){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:608 [inline] __mutex_lock+0x175/0x9c0 kernel/locking/mutex.c:752 diNewIAG fs/jfs/jfs_imap.c:2519 [inline] diAllocExt fs/jfs/jfs_imap.c:1902 [inline] diAllocAG+0xc59/0x2300 fs/jfs/jfs_imap.c:1666 diAlloc+0x8f7/0x1a70 fs/jfs/jfs_imap.c:1587 ialloc+0x84/0x9e0 fs/jfs/jfs_inode.c:56 jfs_mkdir+0x244/0xb30 fs/jfs/namei.c:225 vfs_mkdir+0x57d/0x860 fs/namei.c:4131 do_mkdirat+0x301/0x3a0 fs/namei.c:4154 __do_sys_mkdir fs/namei.c:4174 [inline] __se_sys_mkdir fs/namei.c:4172 [inline] __ia32_sys_mkdir+0xf0/0x140 fs/namei.c:4172 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e -> #4 (&jfs_ip->rdwrlock/1){++++}-{3:3}: __lock_release kernel/locking/lockdep.c:5468 [inline] lock_release+0x33e/0x6c0 kernel/locking/lockdep.c:5774 __mutex_unlock_slowpath+0xa3/0x650 kernel/locking/mutex.c:912 diNewIAG fs/jfs/jfs_imap.c:2634 [inline] diAllocExt fs/jfs/jfs_imap.c:1902 [inline] diAllocAG+0x912/0x2300 fs/jfs/jfs_imap.c:1666 diAlloc+0x8f7/0x1a70 fs/jfs/jfs_imap.c:1587 ialloc+0x84/0x9e0 fs/jfs/jfs_inode.c:56 jfs_mkdir+0x244/0xb30 fs/jfs/namei.c:225 vfs_mkdir+0x57d/0x860 fs/namei.c:4131 do_mkdirat+0x301/0x3a0 fs/namei.c:4154 __do_sys_mkdir fs/namei.c:4174 [inline] __se_sys_mkdir fs/namei.c:4172 [inline] __ia32_sys_mkdir+0xf0/0x140 fs/namei.c:4172 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e -> #3 (&(imap->im_aglock[index])){+.+.}-{3:3}: __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+0x295/0x480 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:4790 shrink_many mm/vmscan.c:4851 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4951 shrink_node mm/vmscan.c:5910 [inline] kswapd_shrink_node mm/vmscan.c:6720 [inline] balance_pgdat+0x1105/0x1970 mm/vmscan.c:6911 kswapd+0x5ea/0xbf0 mm/vmscan.c:7180 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #2 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:3801 [inline] fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3815 might_alloc include/linux/sched/mm.h:334 [inline] slab_pre_alloc_hook mm/slub.c:3891 [inline] slab_alloc_node mm/slub.c:3981 [inline] __do_kmalloc_node mm/slub.c:4121 [inline] __kmalloc_noprof+0xb5/0x420 mm/slub.c:4135 kmalloc_noprof include/linux/slab.h:664 [inline] ea_get+0x21f/0x12c0 fs/jfs/xattr.c:487 __jfs_setxattr+0x1ed/0xfb0 fs/jfs/xattr.c:720 __jfs_xattr_set+0xc6/0x150 fs/jfs/xattr.c:919 __vfs_setxattr+0x173/0x1e0 fs/xattr.c:200 __vfs_setxattr_noperm+0x127/0x660 fs/xattr.c:234 __vfs_setxattr_locked+0x182/0x260 fs/xattr.c:295 vfs_setxattr+0x146/0x350 fs/xattr.c:321 do_setxattr+0x146/0x170 fs/xattr.c:629 setxattr+0x15d/0x180 fs/xattr.c:652 path_setxattr+0x179/0x1e0 fs/xattr.c:671 __do_sys_lsetxattr fs/xattr.c:694 [inline] __se_sys_lsetxattr fs/xattr.c:690 [inline] __ia32_sys_lsetxattr+0xbd/0x160 fs/xattr.c:690 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e -> #1 (&jfs_ip->xattr_sem){++++}-{3:3}: down_read+0x9a/0x330 kernel/locking/rwsem.c:1526 __jfs_getxattr+0xee/0x360 fs/jfs/xattr.c:807 jfs_get_acl+0x7c/0x170 fs/jfs/acl.c:38 __get_acl+0x378/0x4e0 fs/posix_acl.c:159 get_inode_acl fs/posix_acl.c:184 [inline] posix_acl_create+0x14c/0x5f0 fs/posix_acl.c:647 jfs_init_acl+0x9a/0x3a0 fs/jfs/acl.c:135 jfs_mkdir+0x2df/0xb30 fs/jfs/namei.c:236 vfs_mkdir+0x57d/0x860 fs/namei.c:4131 do_mkdirat+0x301/0x3a0 fs/namei.c:4154 __do_sys_mkdir fs/namei.c:4174 [inline] __se_sys_mkdir fs/namei.c:4172 [inline] __ia32_sys_mkdir+0xf0/0x140 fs/namei.c:4172 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e -> #0 (&jfs_ip->commit_mutex/1){+.+.}-{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 jfs_create+0x2c3/0xb40 fs/jfs/namei.c:101 lookup_open.isra.0+0x10a1/0x13c0 fs/namei.c:3505 open_last_lookups fs/namei.c:3574 [inline] path_openat+0x92f/0x29f0 fs/namei.c:3804 do_filp_open+0x1dc/0x430 fs/namei.c:3834 do_sys_openat2+0x17a/0x1e0 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_compat_sys_openat fs/open.c:1480 [inline] __se_compat_sys_openat fs/open.c:1478 [inline] __ia32_compat_sys_openat+0x16e/0x210 fs/open.c:1478 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e other info that might help us debug this: Chain exists of: &jfs_ip->commit_mutex/1 --> &jfs_ip->rdwrlock/1 --> &jfs_ip->commit_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&jfs_ip->commit_mutex); lock(&jfs_ip->rdwrlock/1); lock(&jfs_ip->commit_mutex); lock(&jfs_ip->commit_mutex/1); *** DEADLOCK *** 3 locks held by syz-executor.2/9183: #0: ffff888057d1c420 (sb_writers#29){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3563 [inline] #0: ffff888057d1c420 (sb_writers#29){.+.+}-{0:0}, at: path_openat+0x19e6/0x29f0 fs/namei.c:3804 #1: ffff88804c873d00 (&type->i_mutex_dir_key#13){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #1: ffff88804c873d00 (&type->i_mutex_dir_key#13){++++}-{3:3}, at: open_last_lookups fs/namei.c:3571 [inline] #1: ffff88804c873d00 (&type->i_mutex_dir_key#13){++++}-{3:3}, at: path_openat+0x8c7/0x29f0 fs/namei.c:3804 #2: ffff88804c873948 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_create+0x2a7/0xb40 fs/jfs/namei.c:100 stack backtrace: CPU: 3 PID: 9183 Comm: syz-executor.2 Not tainted 6.10.0-rc4-syzkaller-00148-g50736169ecc8 #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 jfs_create+0x2c3/0xb40 fs/jfs/namei.c:101 lookup_open.isra.0+0x10a1/0x13c0 fs/namei.c:3505 open_last_lookups fs/namei.c:3574 [inline] path_openat+0x92f/0x29f0 fs/namei.c:3804 do_filp_open+0x1dc/0x430 fs/namei.c:3834 do_sys_openat2+0x17a/0x1e0 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_compat_sys_openat fs/open.c:1480 [inline] __se_compat_sys_openat fs/open.c:1478 [inline] __ia32_compat_sys_openat+0x16e/0x210 fs/open.c:1478 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf72ca579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5ebc5ac EFLAGS: 00000292 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 0000000020000040 RDX: 000000000000275a RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi --- 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