From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f80.google.com (mail-ot1-f80.google.com [209.85.210.80]) (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 5ACE73DB992 for ; Tue, 2 Jun 2026 10:12:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780395154; cv=none; b=fhfBwAtxohwU+DOmC6cyAvPcSLdFfcs+ZYIW8gagrGW9MYbzTXWfp+hn4jZNz/8bZ71/lssrvvZT5JIuIDicgQYxdaJhfMiRYLQpshwKhBP+RJc8KT4d2zSGr42nBRQf0JlYh8JU4rUYbMcz1pGcfn5wrvgg4gSAvD7kk2LzJdc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780395154; c=relaxed/simple; bh=YZxBtuHBTrGerHyLY8hEpF9yf+fi3A4xrlVzD2QnjaA=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=DIuQ/NHix5ddt0ACC4kawXmPursV6TG9lgCD2HT0Nl3/TtI2C5x23Ha7PhLwR+4ewE/MjuHnd8vhqZHVfvgmYF7GcJG7THT8TcEU4jCMgmj7BjqPEOPXiuy9FhVihurJvqNsSkONB8FQL+0429oFCnDRfTOzELKURdOo+ne6R0Q= 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=209.85.210.80 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-ot1-f80.google.com with SMTP id 46e09a7af769-7e6cea6ada5so2708857a34.1 for ; Tue, 02 Jun 2026 03:12:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780395150; x=1780999950; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=CQRbFmvJYEk869FT66rgZ3P3ea3IF1pgad6clP7CS1c=; b=nOWEmRnpwS4dNfZ9Xd3nT7Sd+IKM9ziTCQa086r2gB3DMMX0d9ERCTLFkf7nDD8OTg kdFhDwdAA8Em45o7LBCiuUfuJ7LAmjCXtj/mvaiXUjjiOYUDHqlhcAkF3R1mxZqoQbxP DvmmyWOJn3lewUQxlkaCHFj3URWkEw1qzyiAbwgAaZnkruUYi205Nl/eTeS5Wo5XdjCL l8JkrOddD+nB+otnk4QwGex69lzusSFMZI5/sMJ7UqY/kjQ7iqtTh4RO0oY8yL6fnsHn eFiymzD7I7UAJscqk9Ts1pmjpNn8qitZ6r7BkarMdxvoZt14wLlX68JAEyrcnsdxGwrj nncw== X-Forwarded-Encrypted: i=1; AFNElJ/anOe8HJZQbwbai3Ufx/ffaUTbm5TPQtouzE8telv2Fx4WpwYzLud5togsrpu47GnHzmyH9cZAmdPQlrM=@vger.kernel.org X-Gm-Message-State: AOJu0YwOsDfkYbHhhk/BB1sR78cQbMbBX3xG5sOkoU991rslSIFiyS80 We7JUpE8DWPuduakdTpi7XcNtBCXL+SV/DFIlW508yH0cYKv8KoxHABQBMYg0atft5TDBZ0JV8x GItnqsrDkYj7umvx0iJz7gdD+9uAmSfxWwByVVDJpnJBsRLOkiUK85ISoT5A= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4c11:b0:69d:fcab:c640 with SMTP id 006d021491bc7-69e1059f467mr7411099eaf.42.1780395150198; Tue, 02 Jun 2026 03:12:30 -0700 (PDT) Date: Tue, 02 Jun 2026 03:12:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a1eac8e.fbc46276.3c3783.0008.GAE@google.com> Subject: [syzbot] [mm?] WARNING in swap_cluster_assert_empty From: syzbot To: akpm@linux-foundation.org, baohua@kernel.org, bhe@redhat.com, chrisl@kernel.org, kasong@tencent.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, nphamcs@gmail.com, shikemeng@huaweicloud.com, syzkaller-bugs@googlegroups.com, youngjun.park@lge.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 8fde5d1d47f6 Merge tag 'acpi-7.1-rc6' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=118c327a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8118209836970b54 dashboard link: https://syzkaller.appspot.com/bug?extid=deedf22929084640666f compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-8fde5d1d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/529080512bd5/vmlinux-8fde5d1d.xz kernel image: https://storage.googleapis.com/syzbot-assets/39c09b74f46c/bzImage-8fde5d1d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+deedf22929084640666f@syzkaller.appspotmail.com ------------[ cut here ]------------ nr == SWAPFILE_CLUSTER && ci->extend_table WARNING: mm/swapfile.c:471 at swap_cluster_assert_empty+0x2d5/0x320 mm/swapfile.c:471, CPU#3: syz.1.267/6778 Modules linked in: CPU: 3 UID: 0 PID: 6778 Comm: syz.1.267 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:swap_cluster_assert_empty+0x2d5/0x320 mm/swapfile.c:471 Code: 9b ff 49 8d 7d 50 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 46 49 83 7d 50 00 74 a5 e8 4c 09 9b ff 90 <0f> 0b 90 eb 9a e8 41 09 9b ff 90 0f 0b 90 e9 6f ff ff ff 48 89 ef RSP: 0018:ffffc900039d7098 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffffffff826d976c RDX: ffff888037a62540 RSI: ffffffff826d97d4 RDI: ffff8880273450f8 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000200 R10: 0000000000000200 R11: 0000000000000000 R12: 0000000000000200 R13: ffff8880273450a8 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880d6686000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33323ffc CR3: 000000000e596000 CR4: 0000000000352ef0 Call Trace: __free_cluster mm/swapfile.c:585 [inline] free_cluster+0x14b/0x360 mm/swapfile.c:714 __swap_cluster_free_entries+0x73f/0xa30 mm/swapfile.c:1894 swap_put_entries_cluster+0x473/0x5b0 mm/swapfile.c:1584 swap_put_entries_direct+0x123/0x1b0 mm/swapfile.c:2072 shmem_free_swap+0x1f4/0x200 mm/shmem.c:985 shmem_undo_range+0x3fd/0x1570 mm/shmem.c:1139 shmem_truncate_range mm/shmem.c:1277 [inline] shmem_evict_inode+0x3f3/0xc40 mm/shmem.c:1407 evict+0x3c2/0xad0 fs/inode.c:841 iput_final fs/inode.c:1960 [inline] iput.part.0+0x605/0xf50 fs/inode.c:2009 iput+0x35/0x40 fs/inode.c:1975 dentry_unlink_inode+0x2c0/0x4c0 fs/dcache.c:476 __dentry_kill+0x1d0/0x690 fs/dcache.c:718 finish_dput+0x76/0x480 fs/dcache.c:927 dput.part.0+0x456/0x570 fs/dcache.c:976 dput+0x1f/0x30 fs/dcache.c:968 __fput+0x519/0xb50 fs/file_table.c:518 task_work_run+0x150/0x240 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x951/0x2af0 kernel/exit.c:976 do_group_exit+0xd5/0x2a0 kernel/exit.c:1119 get_signal+0x20ff/0x2210 kernel/signal.c:3037 arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop kernel/entry/common.c:98 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline] irqentry_exit+0x39e/0x970 kernel/entry/common.c:162 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7f3317d9ce61 Code: Unable to access opcode bytes at 0x7f3317d9ce37. RSP: 002b:0000000000000030 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f3318015fa0 RCX: 00007f3317d9ce59 RDX: 0000000000000000 RSI: 0000000000000030 RDI: 0000000000000011 RBP: 00007f3317e32d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f3318016038 R14: 00007f3318015fa0 R15: 00007ffc650798c8 --- 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. 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