From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f71.google.com (mail-oa1-f71.google.com [209.85.160.71]) (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 2DB9F22F16E for ; Wed, 11 Feb 2026 00:55:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770771304; cv=none; b=f3OGIp7FqWog07ZsS/FIXtkGdHDbzJfHw+ocbLrkEOHJcSTG9hK9ybn5sOaK9Cxpkb5b9zoUnQWF1lQ0OwhSCnpABAM1Ai14uJEaOR6CQlTeNLQCtpN6NeoX2N1QWINc5eCMSt8WCgX8H9cef4So8fSH85ilvAP5lZVPjQUXHE0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770771304; c=relaxed/simple; bh=TwPbxiYTgAC9yYa4JT8obd495JaCCVrEAjE89fo4yZQ=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=M2hg3tji/2vrDxlHDMnOcQb7LZZx2ELMPOH4rlsEgLLqFI4X68eBJpObzmW0QHuSGPDY92pgUAolUcF5Ki7nPNw8akMlBdxUqddg4at1ShAT+t99TObGvhrTpIBPBTOGbScdjSeNe3nQD/Ho08lZ4gfOTd47JTsefp4lgx39GAM= 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=209.85.160.71 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-oa1-f71.google.com with SMTP id 586e51a60fabf-40ea48ccbd2so1783594fac.3 for ; Tue, 10 Feb 2026 16:55:02 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770771302; x=1771376102; 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=vasFW17jP9OuQZe6dy9Gsi+i8h9WDm6MBanj1zSUnzY=; b=SMfgMl9lgnyKNw8hcBcl392s6H7Z3wMEPyRfj0Ywctdh3C19TYtLWL47hClHngVQXE YFzkjbTlpxPmPLbC2G43IW9xNPxHM6b/URDkfI5E3M67AUcp0tWjfGYxTUW81kMWwlEb TZxmdnZoDrDYqaxhAbSAjF0BZu1W6Cr94zcVaZTSOS6MNMYeu9dAdpTRUGBfkBrgcdvq i5muJ7o0w4RfQIRfWI2zkRxx1AT8br0G5DVUKWhLbjrudA8MjwU65zzq4MiMczE0KGtF 3Y7iT0Z73A+33G93ydLahnlCwuMwNQ1LR0zoqKQCzxaURkf5OyQ80XesPDN08kaDyv+D JK4w== X-Forwarded-Encrypted: i=1; AJvYcCVXYcgJKvMQWsmtaubI8X9igXJXNYjIqFPRjCSud7tgz0I4/d176Fwq2rg4gdcxTQPL5VwR3QUXG+7/UL4=@vger.kernel.org X-Gm-Message-State: AOJu0YwnqY6HNWBT0WGhUftwPikXYNNf3WrCOZnaUeak2f9b6n8iOh9n TxSaOjbmOYfM9sLyEwuhidM5dPPv9TDV1u00gUZuBdTcUDRArM7HzlxLJLlPIqBg2y9Jh1KerPg sKi39dQtuaAowQQNfhM15Ad8+hG4l+wyEUHi07Kub9KrDbZzq7vCyJd9ovwQ= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:188e:b0:659:9a49:8deb with SMTP id 006d021491bc7-6743d0f0526mr445031eaf.45.1770771302105; Tue, 10 Feb 2026 16:55:02 -0800 (PST) Date: Tue, 10 Feb 2026 16:55:02 -0800 In-Reply-To: <20260211003816.2861-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <698bd366.050a0220.2eeac1.0090.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:1195! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 6521 Comm: syz.0.17 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:1195 [inline] RIP: 0010:mmput+0xd0/0xe0 kernel/fork.c:1192 Code: 5b 5d 41 5c e9 01 65 b6 09 e8 9c 9b 41 00 48 89 df e8 24 fb ff ff e8 8f 9b 41 00 5b 5d 41 5c c3 cc cc cc cc e8 81 9b 41 00 90 <0f> 0b 48 89 ef e8 c6 06 ac 00 eb 84 0f 1f 40 00 90 90 90 90 90 90 RSP: 0018:ffffc90003467b78 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888033d6d5c0 RCX: ffffffff81c4f461 RDX: ffff888026543c80 RSI: ffffffff81c4f4bf RDI: ffff888026543c80 RBP: ffff888033d6d684 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888033d6d890 R14: ffff88802b22c140 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881246bf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f31e5ce6286 CR3: 00000000580b6000 CR4: 00000000003526f0 Call Trace: 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: 0033:0x7f532639bf79 Code: Unable to access opcode bytes at 0x7f532639bf4f. RSP: 002b:00007f53271780e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007f5326615fa8 RCX: 00007f532639bf79 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f5326615fac RBP: 00007f5326615fa0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5326616038 R14: 00007ffe73e55530 R15: 00007ffe73e55618 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mmput kernel/fork.c:1195 [inline] RIP: 0010:mmput+0xd0/0xe0 kernel/fork.c:1192 Code: 5b 5d 41 5c e9 01 65 b6 09 e8 9c 9b 41 00 48 89 df e8 24 fb ff ff e8 8f 9b 41 00 5b 5d 41 5c c3 cc cc cc cc e8 81 9b 41 00 90 <0f> 0b 48 89 ef e8 c6 06 ac 00 eb 84 0f 1f 40 00 90 90 90 90 90 90 RSP: 0018:ffffc90003467b78 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888033d6d5c0 RCX: ffffffff81c4f461 RDX: ffff888026543c80 RSI: ffffffff81c4f4bf RDI: ffff888026543c80 RBP: ffff888033d6d684 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888033d6d890 R14: ffff88802b22c140 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881246bf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f31e5ce6286 CR3: 000000000e396000 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=12ad57fa580000 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=16c2365a580000