From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3399C29408 for ; Fri, 7 Mar 2025 03:15:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741317352; cv=none; b=CHY2p/2bnmWz4bkZkmDB7yf1fWFL4gxXByYJ5QLoKqcSA8iG/+rNRunEH/h+clLcPoeCLMKCBTgiHMCP96bmR5BLpUMNSchoZVqHAK7EFR0CDWbW29MtDM7iXL7NqjYJo41QKNlZwYt9swEDJLV/6VRqjRAIjkvReGwsMrsOEpU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741317352; c=relaxed/simple; bh=2rJkWuSBtkISh9ZlfGB8jSMeEWkGzg9DAK79HGQ2coc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=LyeL0wn/fcRj5lf62bVFAn2SQYo6UYIaRwP49vQ64CwAiTd+fFIxSo1rWZ3W8kfhFFcZq0ul6IPFkvTCsp0HWwCbMwEsuqH2oEoV5XrexFMqFA74prEvlhS+r9seyYB+rxIa1cKX1ULjoieyK2Gjpoz4+tfAhyP0LU5TvKby8z8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=UW7ikr8e; arc=none smtp.client-ip=192.198.163.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="UW7ikr8e" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1741317350; x=1772853350; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=2rJkWuSBtkISh9ZlfGB8jSMeEWkGzg9DAK79HGQ2coc=; b=UW7ikr8e+5odZ3AsKsOOZyQcMWpjioLa0En0NFkwqP3Wcpu/8GOC3fzG aZ1pyzjh4XEXtdaE5ntpJ0TpfG4ZlJB1uXVbfAUSTTKlxeghCoMv/OGdc q/1Uef9Umrhs4kU86wF/5gZLjBEXEEDWPO5kysByXsCgCUkFtWYrQ2yZu qJK86fH81klWNhs4P1yn66dUf99w02AZ8ZSMsYTeiGti+B7NM6dwJ1wBo +tAlNifeCDXPstFZ1XiLSKtdyWjhzZvdqxeW0pp4g1UMhIKj8/C4742ur rQybpnabizmJrgzniLPjy1cnEF+OXW31dzbEX5OlIufa3KpPSfA6tURvp Q==; X-CSE-ConnectionGUID: HATp+tEwQP25N2m4RdPDfg== X-CSE-MsgGUID: 1l8yI3s6S1m8Ta+2RpQmdw== X-IronPort-AV: E=McAfee;i="6700,10204,11365"; a="53000951" X-IronPort-AV: E=Sophos;i="6.14,228,1736841600"; d="scan'208";a="53000951" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Mar 2025 19:15:49 -0800 X-CSE-ConnectionGUID: ygjpXukUTe+ZmrjXgPsK4w== X-CSE-MsgGUID: 0L/KVubMRWKEvjlXf7/dsQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.14,228,1736841600"; d="scan'208";a="118943480" Received: from ly-workstation.sh.intel.com (HELO ly-workstation) ([10.239.161.23]) by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Mar 2025 19:15:45 -0800 Date: Fri, 7 Mar 2025 11:16:04 +0800 From: "Lai, Yi" To: Ingo Molnar Cc: Peter Zijlstra , lucas.demarchi@intel.com, linux-kernel@vger.kernel.org, willy@infradead.org, acme@kernel.org, namhyung@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com, kan.liang@linux.intel.com, yi1.lai@intel.com Subject: Re: [PATCH 04/19] perf: Simplify perf_event_alloc() error path Message-ID: References: <20241104133909.669111662@infradead.org> <20241104135517.967889521@infradead.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Thu, Mar 06, 2025 at 10:24:35AM +0100, Ingo Molnar wrote: > > * Lai, Yi wrote: > > > Hi Peter Zijlstra , > > > > Greetings! > > > > I used Syzkaller and found that in linux-next (tag: next-20250303), there are two issues and the first bad commit for both issues is > > > > " > > 02be310c2d24 perf/core: Simplify the perf_event_alloc() error path > > " > > We've had a number of fixes in this area, could you please check > whether you can reproduce this crash with the latest perf tree: > > git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf/core > Tested the tip tree perf/core branch - HEAD 7a310c644cf571fbdb1d447a1dc39cf048634589: Above two issues cannot be reproduced. Regards, Yi Lai > Thanks! > > Ingo