From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f70.google.com (mail-ot1-f70.google.com [209.85.210.70]) (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 B1D28315785 for ; Tue, 10 Feb 2026 23:15:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770765305; cv=none; b=PGNnj58YauTzhg1DUstf1GxSEFVqtTJF70eL8+7u1+QOgWqOyQjsRc/lY9Drck0fCSUX7+SDFwfetBg7X0+9QdsscuZbXlLPq1HVb+01WZgIsWN1iZmNviktIBQLYXY05I+M4e4Iith8qj8zb5OpxvT6c5TZsgePrqiANpdqGs8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770765305; c=relaxed/simple; bh=rtu1wTVcEahq2Xg2vI77XElPPo6Cp5FFN/kX2RMkArI=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=eC4nrCYTUxbetipmYd6kmjLD6b3wv7S78IxSaYITVxtyiDOAySL84JnfFbaoy/qyBoDQNXbFLqxA+RsGaxvON7cMTUFx5KHZqkciLpy+nbzQAbhh+Pt/Z0fwbf5b05AavQbvVKuLb98/s6XwkT3c65KCoNFzN+0JL7wZVB2damA= 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=209.85.210.70 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-ot1-f70.google.com with SMTP id 46e09a7af769-7d19c1317ccso14427799a34.0 for ; Tue, 10 Feb 2026 15:15:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770765302; x=1771370102; 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=rZ4BGbncbA7VnrLDpnzmmATzkBAJR4PIjXHnEm9752E=; b=cZ2HsDCUsV39sHedgzQlnl6RiNewtXBcZ4yO4diofH6iUcdHIFHRcadLfzBvEGoRmo e28MWuSMFhr0buF7e/qJB9fKNlKOjAkmuU8fq1poNw65q5UDkFPqGcQTK3SPjo7DcTnT FY1cTDYAkJW4VkhGQdA85g/Hshnb4uz0y/vwVbDcDpdwOTba/nfWFa8oGNUWIbGEJMFh 1to8T6xaoU9IKCy5+6ZmZwuF3eWOzP++7l8nJ9LKEukfauQbxaB4lhcnT/KZ1/XSin3G HKs8oRf1EsD1UxOXszOskUs9xRa7qyyvWOHwaQoMj8Vogqkrypik7dPfvRbxbc3eV4XO srBg== X-Forwarded-Encrypted: i=1; AJvYcCWuuvJ5gyKkET0tdrkt+yCZlI3VpoqV7hEmzKvZuE6DL5ft2g+bXHaH1XpotjBaKQEAPep8YjY4kLKQya0=@vger.kernel.org X-Gm-Message-State: AOJu0Ywo5tHnA65GqRX63QMbv4cq1CpLaBuxN34WCZ2W/RAl7ZcHm1S/ ur/XLjqaTjtZpirRD/lAh7S59kt8H4rJGYwOAeVstaw6eFbKobdWtHvhHFORSCVTSC17Yy8AxhT Qx7+HrGvlaJ3rfmDvQMUQ88eoIiWDtldRN5lwmzzjB0HKv9m1FfhjqR15DGg= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:ee06:0:b0:662:fa52:9317 with SMTP id 006d021491bc7-6743871ecc6mr369916eaf.26.1770765302678; Tue, 10 Feb 2026 15:15:02 -0800 (PST) Date: Tue, 10 Feb 2026 15:15:02 -0800 In-Reply-To: <20260210225152.2795-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <698bbbf6.a70a0220.2c38d7.007d.GAE@google.com> Subject: Re: [syzbot] [kernel?] KASAN: slab-use-after-free Read in futex_unqueue From: syzbot To: hdanton@sina.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: kernel BUG in __mmput ------------[ cut here ]------------ kernel BUG at kernel/fork.c:1168! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 6657 Comm: syz.0.84 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:__mmput kernel/fork.c:1168 [inline] RIP: 0010:__mmput+0x36a/0x410 kernel/fork.c:1166 Code: e8 ab 9c 41 00 48 89 df e8 43 ba b3 00 e9 c4 fd ff ff e8 99 9c 41 00 48 89 df e8 e1 b1 ab 00 e9 65 fd ff ff e8 87 9c 41 00 90 <0f> 0b e8 7f 9c 41 00 48 89 df e8 c7 cc ff ff eb b3 48 89 ef e8 bd RSP: 0000:ffffc90003107b50 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88802a7124c0 RCX: ffffffff81c4f02d RDX: ffff8880784e1e40 RSI: ffffffff81c4f339 RDI: ffff8880784e1e40 RBP: 00000000ffffffff R08: 0000000000000005 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000000 R12: 0000000000000200 R13: ffff88802a712790 R14: ffff88801cf9f400 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881245bf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557ac0c4e8 CR3: 0000000028ca2000 CR4: 00000000003526f0 Call Trace: mmput+0x67/0x80 kernel/fork.c:1197 exit_mm kernel/exit.c:581 [inline] do_exit+0x78a/0x2a30 kernel/exit.c:959 do_group_exit+0xd5/0x2a0 kernel/exit.c:1112 get_signal+0x1ec7/0x21e0 kernel/signal.c:3034 arch_do_signal_or_restart+0x91/0x770 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x4a0 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline] do_syscall_64+0x668/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f362119bf79 Code: Unable to access opcode bytes at 0x7f362119bf4f. RSP: 002b:00007f36220860e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f3621415fa8 RCX: 00007f362119bf79 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3621415fa8 RBP: 00007f3621415fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3621416038 R14: 00007ffc4753fb50 R15: 00007ffc4753fc38 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__mmput kernel/fork.c:1168 [inline] RIP: 0010:__mmput+0x36a/0x410 kernel/fork.c:1166 Code: e8 ab 9c 41 00 48 89 df e8 43 ba b3 00 e9 c4 fd ff ff e8 99 9c 41 00 48 89 df e8 e1 b1 ab 00 e9 65 fd ff ff e8 87 9c 41 00 90 <0f> 0b e8 7f 9c 41 00 48 89 df e8 c7 cc ff ff eb b3 48 89 ef e8 bd RSP: 0000:ffffc90003107b50 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88802a7124c0 RCX: ffffffff81c4f02d RDX: ffff8880784e1e40 RSI: ffffffff81c4f339 RDI: ffff8880784e1e40 RBP: 00000000ffffffff R08: 0000000000000005 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000000 R12: 0000000000000200 R13: ffff88802a712790 R14: ffff88801cf9f400 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881245bf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557ac0c4e8 CR3: 0000000075a0c000 CR4: 00000000003526f0 Tested on: commit: dc855b77 Merge tag 'irq-drivers-2026-02-09' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11aab402580000 kernel config: https://syzkaller.appspot.com/x/.config?x=86c6013ce1247095 dashboard link: https://syzkaller.appspot.com/bug?extid=6c1861115b4253e45969 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 patch: https://syzkaller.appspot.com/x/patch.diff?x=111d0e5a580000