From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp153-165.sina.com.cn (smtp153-165.sina.com.cn [61.135.153.165]) (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 3D9411A6815 for ; Tue, 25 Aug 2026 06:46:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=61.135.153.165 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787640370; cv=none; b=t5UGeOH9uDVRyiwbnpBDKz6Z/WXbncFJqGq5Ibnv83euyYuE0Xp/Rd+rALvT+cdleo6KiRUP/5QW9KdrpThsbHMUY5GMGOV69B0NCFYqUNpePvC0HmT0lK20y7dS3zU930nEOP1Bx3J6CAOWf2C1zQ1fA3BjmO7qNPKesMUSTyo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787640370; c=relaxed/simple; bh=Mpet5v8PbkmOMB57V+GBl9/w1eFNgPSqTrZ+a/7/y7Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kpZ9Q0BDG9HYzWDT3ei1fhrolDLW8z5H8lZBWFCBlFL/2odcxBVAJeBfYmnB2UmAsFCqBGhayp7qH8vFJzlXBrsC1Z+s7CQkrRoAiZeRC32HQssimjvEX9WRpddcDoL0G+1syeQnsOZG8b3k7McFaKxZaVwcY+TBN9FmBwj2Ugs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b=E0ZIgsUU; arc=none smtp.client-ip=61.135.153.165 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b="E0ZIgsUU" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1787640363; bh=Mpet5v8PbkmOMB57V+GBl9/w1eFNgPSqTrZ+a/7/y7Q=; h=From:Subject:Date:Message-ID; b=E0ZIgsUUcHW3NiB7GID/6cK5im91sXd9H3yhDZaZErPh+fUEOVbPpDSCmfaYxXXSj 9/VFgSf4EO5g3EKJi96Jkdm47B03hCFIeoFtDsikqYRLdzY9+O3aLcP3w/0D+kNQQl YW/H6qE0wrBoCph8d0rAvdaQ0pSfX9/Av6njp5js= X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([114.249.62.194]) by sina.com (10.54.253.32) with ESMTP id 6A8D39FC00007A0A; Tue, 25 Aug 2026 14:45:22 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=hdanton@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=hdanton@sina.com X-SMAIL-MID: 4797094457020 X-SMAIL-UIID: 220ED35ACA1B48AFA97EF5A114D90D3F-20260825-144522-1 From: Hillf Danton To: Shin'ichiro Kawasaki Cc: Eric Dumazet , syzbot , Nilay Shroff , Keith Busch , boqun@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, peterz@infradead.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [net?] WARNING: locking bug in tcp_tsq_handler Date: Tue, 25 Aug 2026 14:45:06 +0800 Message-ID: <20260825064507.1499-1-hdanton@sina.com> In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Tue, 25 Aug 2026 14:44:35 +0900 Shin'ichiro Kawasaki wrote: > On Aug 25, 2026 / 03:50, Eric Dumazet wrote: > > > > I think 19bdb70c77d3 should be reverted. > > Just reverting the commit will reintroduce the other lockdep WARN that the > commit addressed. I hope to have another fix to avoid the WARN. > I do not think you know the root cause of that lockdep warn, so reverting 19bdb70c77d3 is the right thing to do because of [11, 12]. [11] ffa1e7ada456 ("block: Make request_queue lockdep splats show up earlier") [12] Subject: Re: [PATCH] nbd: don't warn when reclassifying a busy socket lock https://lore.kernel.org/lkml/20260816014906.1149-1-hdanton@sina.com/