From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp-fw-80007.amazon.com (smtp-fw-80007.amazon.com [99.78.197.218]) (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 D3DFF22CBF9 for ; Tue, 24 Jun 2025 12:44:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=99.78.197.218 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750769066; cv=none; b=MQ80x/7c88FDHkAUdcDvrJQ+VOihHxSUMDfzD3ukEKCCUIgY4wogu7oyrMt3O3Mkt4BGx6M4HjOxsSBQJhf31R8fUGceprVEfbyWrFG4KY6+4Kz/MHqG6k+RI5FhNz49CWety8Qc+aV62ZzWWVALg5SuK6ibj72tq5K7jXDzzLg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750769066; c=relaxed/simple; bh=xKH1I/vrL/pyyYmCDEAIIsVLnzWhz3lMqOmryPR161I=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=I5Rq6N7SvBO5/9DI7OYE4jrX8hWshQ3ln30bu+tPI+I3v8IzzMPdri8ZNqMyhvLfdZOk1lMQZ4HmRFfOsmOXjyvlV7CyuU166plYB6w/Tes6X3uu7IXPel6Sfsl4H98Ai1puwwsRq94GaA5iOt43ZB/6P/cUztvkmG/auYjGB+8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com; spf=pass smtp.mailfrom=amazon.co.jp; dkim=pass (2048-bit key) header.d=amazon.com header.i=@amazon.com header.b=m3S457P9; arc=none smtp.client-ip=99.78.197.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.co.jp Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=amazon.com header.i=@amazon.com header.b="m3S457P9" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazoncorp2; t=1750769065; x=1782305065; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=XdhYht358jnNIuTVyQjBOMeJxFoewBGgDQ3f9ZJ5D4k=; b=m3S457P9Pk1cHQ+XNSirioyikxInwVH5T3Bl9PzJ/J+0HFjDaIyYQ8+9 SRCXzRkhPLcps7PkNli5V8LPF7hYla0elPrulEIU/NxfKopdIb0hyRCkk 9yG9GtuSH8l1WpTTVO34y/jArrMANVMhb3tFh3E6mi0auPY4EcwQDbDji nYuQbxlTgXhr2UGeyv2j9ScgUgS4u6OXhzZJ0JHJVjgiazu9Zaknf+7m0 rg+PG5mM87wBBDdB0hKNd9Xo57mRvVbVFOafHJF4ovDawGL28N5eqk/Pe nULMMi3EQkchZoKfwEUU7QS7DBfFVXas5Fv2xWgix5hj1i6djGZ9Jd9ze g==; X-IronPort-AV: E=Sophos;i="6.16,261,1744070400"; d="scan'208";a="419451125" Received: from pdx4-co-svc-p1-lb2-vlan2.amazon.com (HELO smtpout.prod.us-west-2.prod.farcaster.email.amazon.dev) ([10.25.36.210]) by smtp-border-fw-80007.pdx80.corp.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jun 2025 12:44:22 +0000 Received: from EX19MTAUWB002.ant.amazon.com [10.0.21.151:32657] by smtpin.naws.us-west-2.prod.farcaster.email.amazon.dev [10.0.28.168:2525] with esmtp (Farcaster) id f4877d73-902a-40af-b5b9-7b8e179865b2; Tue, 24 Jun 2025 12:44:21 +0000 (UTC) X-Farcaster-Flow-ID: f4877d73-902a-40af-b5b9-7b8e179865b2 Received: from EX19D001UWA001.ant.amazon.com (10.13.138.214) by EX19MTAUWB002.ant.amazon.com (10.250.64.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1544.14; Tue, 24 Jun 2025 12:44:21 +0000 Received: from b0be8375a521.amazon.com (10.37.245.7) by EX19D001UWA001.ant.amazon.com (10.13.138.214) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1544.14; Tue, 24 Jun 2025 12:44:20 +0000 From: Kohei Enju To: CC: , Subject: Re: [syzbot] [hams?] KASAN: slab-use-after-free Read in rose_get_neigh Date: Tue, 24 Jun 2025 21:43:20 +0900 Message-ID: <20250624124408.28785-1-enjuk@amazon.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <6807019a.050a0220.380c13.0001.GAE@google.com> References: <6807019a.050a0220.380c13.0001.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 Content-Type: text/plain X-ClientProxiedBy: EX19D041UWA003.ant.amazon.com (10.13.139.105) To EX19D001UWA001.ant.amazon.com (10.13.138.214) #syz test diff --git a/net/rose/rose_route.c b/net/rose/rose_route.c index 2dd6bd3a3011..a85969e2369f 100644 --- a/net/rose/rose_route.c +++ b/net/rose/rose_route.c @@ -480,6 +480,7 @@ void rose_rt_device_down(struct net_device *dev) struct rose_neigh *s, *rose_neigh; struct rose_node *t, *rose_node; int i; + unsigned char old_count; spin_lock_bh(&rose_node_list_lock); spin_lock_bh(&rose_neigh_list_lock); @@ -497,7 +498,8 @@ void rose_rt_device_down(struct net_device *dev) t = rose_node; rose_node = rose_node->next; - for (i = 0; i < t->count; i++) { + old_count = t->count; + for (i = 0; i < old_count; i++) { if (t->neighbour[i] != s) continue;