From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (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 0BE233C6AC for ; Sat, 29 Jun 2024 10:05:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719655523; cv=none; b=Dlv91QyKwYhNUHSyjFofMADqcJlg/FPTmXHOzXrBnQ1YsyXuditctTbW8KhSYuyEHvvUC25PAbw638hTqgcyPCoFAGaG8TNPJnLvCRIx2qJHf96y6rozTvIlZVDiGucAZRCrtFirQeIBbdFaHfUQYhKISIqubYneOD04VfqfXxo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719655523; c=relaxed/simple; bh=dYQz9x1WeHfM3yS1UMBFOMBJRJ8eXGc4FYZB0fLyLGQ=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=DdQJz2XFSZZzN1u+ThR95pQngOXSVWRII21pQ/twgcrQ/PMfXwlnMP9rj+RKItkOJHTYh/IqYgtCVqqHQFZWUmq95ELzdygJnje5RxwOsZnt9FzxbJfdu0QaPtjUQ5DCl7oEiN9eJpEhTlzY2oftjRCAdXK5IRCOCwOKaFaSaow= 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=209.85.166.70 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-f70.google.com with SMTP id ca18e2360f4ac-7f3ce244c92so148349839f.2 for ; Sat, 29 Jun 2024 03:05:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1719655521; x=1720260321; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=/WkChmWjhzPDeeoPw57UVshG/hNmwAmpx6hYHqNP++E=; b=AACc6kQr1imWHz5oVQ7MXHW4IaxwIxtslqFbzYPg3ZjlyCbCEJ49pU81WRZC+w7jaB X2HAM++LtpJV9MXtX3Pcl/k/G1lL/PS2bx2+P3hl3fUo/SFHLxdfDpAs/a39VZjuqbiV AnriOdFKX/C7GP5sX7VFD+mCrMAaadA/FBDo5TuYhncTrThOh+0yyuPreKrD3ZEqeJ2u 9qE+YPAJMXsFqFegNlgldsg/5cNYeUEue/M8LqaNKJh6/9gcK83UNOddVlql8TVm6gtn 9ozuiYtqz9iaopnIQDUJRjLCkFWKCbyUuiyRisE45bKf4F8ddVkfHhBgwviTvG1nRBoG PrUg== X-Forwarded-Encrypted: i=1; AJvYcCUfOComoGyq5LQlx9NWMFMhCjQFCAmPZmW9a17yZodIk+g4Pfox0a0uv3MYjAdJkJURnFLi1urffQgOIreHCo7DbvUXR4GD2nfNIJ40 X-Gm-Message-State: AOJu0YzMYlU4GZ15DHLJTuzm93QMmvWTS4FpjR/l+V9Yyspu9ghNmf6b 8YyS9+vD+w2fXOdrLCZ0RPzRQN2OJ3BOgQUJop+NAGgyjSvqgnwPJRYNUXjG4WcYetoZCdi4ucv Dj3KCigCt3IUwMa6FuGjaqunY7m4yiPrJ+MSQdBvK8aOU616kUwPzlCI= X-Google-Smtp-Source: AGHT+IHAzox96lBz2evPLKUGgO1mNSE9tRL7jsUinMC/LhQw4M4PbdSALsZtMFbWLfAwvT8qCYk5sM7r1qpaKr1ojmpIObRFFErD Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:15c2:b0:7f4:e1f3:c939 with SMTP id ca18e2360f4ac-7f62edfd0c0mr2217439f.1.1719655521118; Sat, 29 Jun 2024 03:05:21 -0700 (PDT) Date: Sat, 29 Jun 2024 03:05:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000078f75f061c0480a1@google.com> Subject: [syzbot] [jfs?] possible deadlock in __jfs_setxattr 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: 55027e689933 Merge tag 'input-for-v6.10-rc5' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17bdd2ae980000 kernel config: https://syzkaller.appspot.com/x/.config?x=53ab35b556129242 dashboard link: https://syzkaller.appspot.com/bug?extid=6b5a66ea06e836f7d821 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-55027e68.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a36929b5a065/vmlinux-55027e68.xz kernel image: https://storage.googleapis.com/syzbot-assets/d72de6f61ddc/bzImage-55027e68.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6b5a66ea06e836f7d821@syzkaller.appspotmail.com ====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc5-syzkaller-00018-g55027e689933 #0 Not tainted ------------------------------------------------------ syz-executor.2/16354 is trying to acquire lock: ffffffff8dd3ab20 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:334 [inline] ffffffff8dd3ab20 (fs_reclaim){+.+.}-{0:0}, at: prepare_alloc_pages.constprop.0+0x155/0x560 mm/page_alloc.c:4449 but task is already holding lock: ffff88804b8b2760 (&jfs_ip->xattr_sem){++++}-{3:3}, at: __jfs_setxattr+0x10a/0xfb0 fs/jfs/xattr.c:671 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&jfs_ip->xattr_sem){++++}-{3:3}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 __jfs_setxattr+0x10a/0xfb0 fs/jfs/xattr.c:671 __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 -> #3 (&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_mkdirat fs/namei.c:4169 [inline] __se_sys_mkdirat fs/namei.c:4167 [inline] __ia32_sys_mkdirat+0x84/0xb0 fs/namei.c:4167 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 -> #2 (&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: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 -> #1 (&(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 -> #0 (fs_reclaim){+.+.}-{0:0}: 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 __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] prepare_alloc_pages.constprop.0+0x155/0x560 mm/page_alloc.c:4449 __alloc_pages_noprof+0x194/0x2460 mm/page_alloc.c:4667 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] __kmalloc_large_node+0x7f/0x1a0 mm/slub.c:4067 __do_kmalloc_node mm/slub.c:4110 [inline] __kmalloc_noprof.cold+0xc/0x61 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_setxattr fs/xattr.c:687 [inline] __se_sys_setxattr fs/xattr.c:683 [inline] __ia32_sys_setxattr+0xc0/0x160 fs/xattr.c:683 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: fs_reclaim --> &jfs_ip->commit_mutex --> &jfs_ip->xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&jfs_ip->xattr_sem); lock(&jfs_ip->commit_mutex); lock(&jfs_ip->xattr_sem); lock(fs_reclaim); *** DEADLOCK *** 4 locks held by syz-executor.2/16354: #0: ffff888057c08420 (sb_writers#27){.+.+}-{0:0}, at: path_setxattr+0xc3/0x1e0 fs/xattr.c:669 #1: ffff88804b8b2a80 (&sb->s_type->i_mutex_key#36){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #1: ffff88804b8b2a80 (&sb->s_type->i_mutex_key#36){+.+.}-{3:3}, at: vfs_setxattr+0x123/0x350 fs/xattr.c:320 #2: ffff88804b8b26c8 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: __jfs_xattr_set+0xad/0x150 fs/jfs/xattr.c:918 #3: ffff88804b8b2760 (&jfs_ip->xattr_sem){++++}-{3:3}, at: __jfs_setxattr+0x10a/0xfb0 fs/jfs/xattr.c:671 stack backtrace: CPU: 3 PID: 16354 Comm: syz-executor.2 Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #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 __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] prepare_alloc_pages.constprop.0+0x155/0x560 mm/page_alloc.c:4449 __alloc_pages_noprof+0x194/0x2460 mm/page_alloc.c:4667 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] __kmalloc_large_node+0x7f/0x1a0 mm/slub.c:4067 __do_kmalloc_node mm/slub.c:4110 [inline] __kmalloc_noprof.cold+0xc/0x61 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_setxattr fs/xattr.c:687 [inline] __se_sys_setxattr fs/xattr.c:683 [inline] __ia32_sys_setxattr+0xc0/0x160 fs/xattr.c:683 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: 0023:0xf7320579 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:00000000f5ed05ac EFLAGS: 00000292 ORIG_RAX: 00000000000000e2 RAX: ffffffffffffffda RBX: 0000000020000100 RCX: 0000000020000140 RDX: 0000000020000180 RSI: 000000000000e00f 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