From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 E84B93C6BA for ; Tue, 4 Mar 2025 02:22:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741054924; cv=none; b=QmaYaJ5XsNmbEOi3xvW9CSEauqT2Vl/bBDlzA566ZwdPSqDfJOv5h8BXehD2rjS1OhQOgmYEfdISPe5yIB5hd0NuLM5UIUWc2U14I2pMD7ByjIRBr1HLolYI3GpommyjrazajLiUJ9sW2iodvd7L8P7XJw3CD1pQ5omMFgjV1xo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741054924; c=relaxed/simple; bh=1ptdvDuqZVxnA8O+G5S1d6+zbfTqaG3HDLU4i9m86fs=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=CeickB5Qjc9cHSUnjVhAbekYUVgL+jBQagIEN8ySDnvaYDwr7xv38RhBEJaxKB6JX0mALzTNuumKD6YMzZ6bvUPdn3tP3FkAnydEovQdUuUOvCoE/6px3aHYWlKrC6xM+tCQ2vBcnZbSpuaT/SyS1Ow5A5Zuzt154go5Ake9sZI= 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=209.85.166.200 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-f200.google.com with SMTP id e9e14a558f8ab-3ce81a40f5cso117266165ab.1 for ; Mon, 03 Mar 2025 18:22:02 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741054922; x=1741659722; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=hIxRWFkR2d3r8alT3WiHAXt3dE1aM+y/MWXOoLEHBrM=; b=kIOjY1DMze8jUbeecyO283ovypyCpFNmtm48u1DkbFL4Ch3xNE5e/dN0HOS9yGSwy1 NvQcTJL6KH5DkdmhUFE9MPqgN2Nez1r9owgDCiRMpcK2Q3mzrTkUzQs+7owjpv5K/t4T k5KQEu2/r2YCLI50Ar8iXJWDlzwtao4sNgio84i1r1w50K8/+u+qgvJEC8mnWbD8SzP4 hjSPcuH6evH1PmO/02J6zgIzaBiD9/39THYkmjivy3km3MhtNNZuDZDhxICgEg+fRcGD lfewlu/inwWQX4Be6iCA4CnfCLHV0FwTRYN2r8zi4h56wsCjwdBoEGzRe2UnjGqa0WYZ YdiQ== X-Forwarded-Encrypted: i=1; AJvYcCXEA0SsalqI2iEMWFLLt7yBHoN0gMVs8lVPh5USYCzrHDUYFI8eyxbf0vpbceMSMTVYH0dTgm8/Qj7eT2Y=@vger.kernel.org X-Gm-Message-State: AOJu0YysiSvARze9K/EQFPAlVcdAYoMWo1sttH+bLqOnW12iOExOfaTY rmYASc7QhUMWcu1FY7Cgow5Hmz1gRBuF+CVNgrqWwG3D15ZS/OPKLMq2ODboo1yyGKjBIKL74Bo reDRCsg4tQ0gEs+MKf4ryFU1Scwj0DkkMlvta1gGMdq5lvOTN17Po6/U= X-Google-Smtp-Source: AGHT+IFyNlwhl32ETaUf97uU5bXB0H2AYf6FP0tXMvTS7trUqQmDHhOrG8uc6SGzN9VrltS3nWyRelNvhDnDblE0AB4H+hUpZbvg 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:e14:b0:3d3:df02:1882 with SMTP id e9e14a558f8ab-3d3e6fadcbdmr130403145ab.20.1741054922023; Mon, 03 Mar 2025 18:22:02 -0800 (PST) Date: Mon, 03 Mar 2025 18:22:02 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67c663ca.050a0220.eb84a.0048.GAE@google.com> Subject: Re: [syzbot] [xfs?] [mm?] WARNING: bad unlock balance in __mm_populate From: syzbot To: eadavis@qq.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING: bad unlock balance in __mm_populate XFS (loop0): Ending clean mount XFS (loop0): Quotacheck needed: Please wait. XFS (loop0): Quotacheck: Done. ===================================== WARNING: bad unlock balance detected! 6.14.0-rc4-syzkaller-ge056da87c780-dirty #0 Not tainted ------------------------------------- syz.0.16/7412 is trying to release lock (&mm->mmap_lock) at: [] mmap_read_unlock include/linux/mmap_lock.h:217 [inline] [] __mm_populate+0x354/0x408 mm/gup.c:2048 but there are no more locks to release! other info that might help us debug this: no locks held by syz.0.16/7412. stack backtrace: CPU: 0 UID: 0 PID: 7412 Comm: syz.0.16 Not tainted 6.14.0-rc4-syzkaller-ge056da87c780-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_unlock_imbalance_bug+0x254/0x2ac kernel/locking/lockdep.c:5289 __lock_release kernel/locking/lockdep.c:5518 [inline] lock_release+0x410/0x9e4 kernel/locking/lockdep.c:5872 up_read+0x24/0x3c kernel/locking/rwsem.c:1619 mmap_read_unlock include/linux/mmap_lock.h:217 [inline] __mm_populate+0x354/0x408 mm/gup.c:2048 mm_populate include/linux/mm.h:3386 [inline] vm_mmap_pgoff+0x304/0x3c4 mm/util.c:580 ksys_mmap_pgoff+0x3a4/0x5c8 mm/mmap.c:607 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 ------------[ cut here ]------------ DEBUG_RWSEMS_WARN_ON(tmp < 0): count = 0xffffffffffffff00, magic = 0xffff0000d520abe0, owner = 0x1, curr 0xffff0000c9001e80, list empty WARNING: CPU: 0 PID: 7412 at kernel/locking/rwsem.c:1346 __up_read+0x3bc/0x5f8 kernel/locking/rwsem.c:1346 Modules linked in: CPU: 0 UID: 0 PID: 7412 Comm: syz.0.16 Not tainted 6.14.0-rc4-syzkaller-ge056da87c780-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __up_read+0x3bc/0x5f8 kernel/locking/rwsem.c:1346 lr : __up_read+0x3bc/0x5f8 kernel/locking/rwsem.c:1346 sp : ffff80009c0c79e0 x29: ffff80009c0c7a60 x28: 1ffff00011f780cb x27: ffff80008fbc0000 x26: dfff800000000000 x25: ffffffffffffff00 x24: ffff0000d520ac38 x23: ffff0000d520abe0 x22: ffffffffffffff00 x21: 0000000000000001 x20: ffff0000c9001e80 x19: ffff0000d520abe0 x18: 0000000000000008 x17: 0000000000000000 x16: ffff8000832b81a0 x15: 0000000000000001 x14: 1ffff00013818e94 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000003 x10: 0000000000ff0100 x9 : bdbc827636499100 x8 : bdbc827636499100 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff80009c0c7198 x4 : ffff80008fcaf780 x3 : ffff80008324a1b4 x2 : 0000000000000001 x1 : 0000000100000001 x0 : 0000000000000000 Call trace: __up_read+0x3bc/0x5f8 kernel/locking/rwsem.c:1346 (P) up_read+0x2c/0x3c kernel/locking/rwsem.c:1620 mmap_read_unlock include/linux/mmap_lock.h:217 [inline] __mm_populate+0x354/0x408 mm/gup.c:2048 mm_populate include/linux/mm.h:3386 [inline] vm_mmap_pgoff+0x304/0x3c4 mm/util.c:580 ksys_mmap_pgoff+0x3a4/0x5c8 mm/mmap.c:607 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 irq event stamp: 74469 hardirqs last enabled at (74469): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (74469): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (74468): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (74468): [] _raw_spin_lock_irqsave+0x2c/0x7c kernel/locking/spinlock.c:162 softirqs last enabled at (74288): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (74286): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- Tested on: commit: e056da87 Merge remote-tracking branch 'will/for-next/p.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=125fafb8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d6b7e15dc5b5e776 dashboard link: https://syzkaller.appspot.com/bug?extid=8f9f411152c9539f4e59 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=13a598b7980000