From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f196.google.com (mail-pl1-f196.google.com [209.85.214.196]) (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 52B9033A9E5 for ; Fri, 27 Feb 2026 03:53:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.196 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772164434; cv=none; b=SMUTy2R+BtUweziMsxhOcCIYsymRCkiBDJp4f+RI+A3AP64ymW6SiIXruvYbGJhLEXkVO38D7ua3tGWdsnks3HuHupihxcRmVzqpMyYUO1rqf+40sDgXjQUyIeZo/0nF5iNAuZDoB5YHVbOHA75B3In8PTWuSibHoiCO6NawE7M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772164434; c=relaxed/simple; bh=zTuuLUaWX2nnbSpNamvQH8sri2HhCf5G7tUFH903TXA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=I5Q1EjGGa8BvBHXwwtxuLvbgwZSG8nrNwF0au2Vw9a8/FRD8G8maPuDrLPHY+clBC+eS6DF6fiKwTWbqEExTrqltCcyaPtqA/7e/H9o97MFOH6MJgwaSym+WATkkWDz39E7pzttjvUYhTp2U2ZC7DwjUJ8FHBKB+MmJGYZPvQPo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=b79cBtnh; arc=none smtp.client-ip=209.85.214.196 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="b79cBtnh" Received: by mail-pl1-f196.google.com with SMTP id d9443c01a7336-2ad21f437eeso11849485ad.0 for ; Thu, 26 Feb 2026 19:53:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1772164433; x=1772769233; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=pwdSgM1NQbWP7Rhe378wlcNmZqA7RqveMVNj2ZfOXJQ=; b=b79cBtnhX5DYVf7TRGR0jTubka9G1aJBvGFK86o0gRpavdkPf5JrbuQGcogKxjU3Wg SwePW7ajFrxDrHH05sEsgAICPtydywgxz3ZUJIUAQo78nJhh32C+6CVrPQxxDRa+TKwd so52/1n3KqT6eg7X0roR+mAO0qAOors3jN4nvnpoEcfiHQe7PjyTANqlkgzMey4g21Qa hK3RSkGtExzUA9TdLCKrwpvKQLnhP0to/BU2ELQfE3RocbqkzG19qJOh7+BWao8Gj1Yr 3W1BUJXgviT21caFHpehh17NraI+7WgJqnDJ0ew3AohTGRjbHCgEaQ8cZpoubcIa9ZLy zvjw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772164433; x=1772769233; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=pwdSgM1NQbWP7Rhe378wlcNmZqA7RqveMVNj2ZfOXJQ=; b=k1ALUWPIZbg9suAq5LErBR1jVtlbBrPGTHoAxj0oDsm9WWgoLuv0F7k9tCr69Da4Ee 4Y5N+JlFn/AScVYNxcuP486icNVPRWS98eRXrxKcVGX3Pqpi8C9FGy6Q3eEiPl1F3Rv8 Lh1UYHM9c3LJZWQgS60oOOK3/1rRkxzDxTb6nrRTyF0Ui1RXWq9eoMyecRjQIML26mll SE8fQMyrdoBpQFyOHJlqb9sw6H4S0CKL1JyhsVZK/3RGxBcJa3g+Q7LpE24pNmA6isMe szq5X/s2dFNSVR0iAwlc6mq5P3KUISgeiJglmYkJstkfF0Hnc56TOiqk40UWAw7OCYf3 0QmA== X-Forwarded-Encrypted: i=1; AJvYcCVMOS8nPTqvvnjvpoM0uyRz3JjoQMDHouwUZbF69iTe1jhESbt4YG/axxF8JMiwmU153sKAADJIIQTKhxY=@vger.kernel.org X-Gm-Message-State: AOJu0YzPwpMWKQDL9oM3QUZ2BuPhhKThqIM9tqwTgJlmu2dmq8XOPnuP YLTU47envV04w3aZgpOB+PuN8ccNkrIE18sXUZ59MmjI5GpPx9OsJnsP X-Gm-Gg: ATEYQzwi+0jgFP7zyvjXbrvDUhn1p4TgaL1TRBNxdcc1SxTbUVDlGwibZF86gKkvDps E3QVfjvrJr80sk+OOKng7vmxWo+ot45eYE60ivHU/CT2iViFtA0ToQbWtnJHVVBEwJkD52zzi97 YG16fnsQUxXlPVchHcZRPQXYMSB8bxWEhPzwqaYakWha+2/Gpdxw9A5vGeKWz1d90ZLaBLV+dai GJh22Gf2+YsYD/pVyN1OBM/EwQeR5wXmaObuGk9KXDJ1drqVenYUtuYfr/Nr/TRV+P62P65REde 11xzsEQjFcfWP6DIwDCmXZR1JyqyUSHh5zDir9wkCgdoTAjO4oJZpj9e2BHi5d55gmo9qucm3hg S7MMAi4EZIgQ1P+GZxLoz8auWbTlERa0PTK2hZdYMI7NE/F5QCMUGVR7wXpFSu7tdEYHuyC75Ri ZVzKMeWmcqd14PWZPZSgN0pzjen7SR5e7MBiyDN1MTE+lcxn4GAQ== X-Received: by 2002:a17:902:ea08:b0:2aa:e9f0:146c with SMTP id d9443c01a7336-2adf79cd7d5mr56815645ad.29.1772164432629; Thu, 26 Feb 2026 19:53:52 -0800 (PST) Received: from lima-ubuntu.hz.ali.com ([47.246.98.215]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2adfb5c3b01sm41487125ad.31.2026.02.26.19.53.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Feb 2026 19:53:52 -0800 (PST) From: Qing Wang To: syzbot+9ea7c90be2b24e189592@syzkaller.appspotmail.com Cc: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, haoluo@google.com, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, martin.lau@linux.dev, mathieu.desnoyers@efficios.com, mattbobrowski@google.com, mhiramat@kernel.org, rostedt@goodmis.org, sdf@fomichev.me, song@kernel.org, syzkaller-bugs@googlegroups.com, yonghong.song@linux.dev Subject: Re: [syzbot] [bpf?] [trace?] KASAN: slab-use-after-free Read in bpf_trace_run3 (2) Date: Fri, 27 Feb 2026 11:53:41 +0800 Message-Id: <20260227035341.1108372-1-wangqing7171@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <69a0544c.050a0220.3a55be.0004.GAE@google.com> References: <69a0544c.050a0220.3a55be.0004.GAE@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit #syz test diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 2d14fb6d0ed0..038bf4436959 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -3783,6 +3783,8 @@ static void bpf_raw_tp_link_release(struct bpf_link *link) bpf_probe_unregister(raw_tp->btp, raw_tp); bpf_put_raw_tracepoint(raw_tp->btp); + + synchronize_rcu(); } static void bpf_raw_tp_link_dealloc(struct bpf_link *link)