From nobody Thu Apr 10 20:44:23 2025 Received: from ksmg01.maxima.ru (ksmg01.mt-integration.ru [81.200.124.38]) (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 F2EC81EF092; Thu, 3 Apr 2025 08:20:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=81.200.124.38 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743668450; cv=none; b=NshUltrjcK7w/W4oQEnmcRB6GfYdJwwZevyKqrxrWWfMb+TlCv54pT4Cyv3jGxwVcV5CwG0VB04AweLTxKVziEifP/lF5gviE7q8MsMGINVWHhOVASVCLUAffidNs4+DCH898ip4knsVhJR9AGbH3N+oEaaK7QrLp33lx131xZ0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743668450; c=relaxed/simple; bh=oOy9SaCetbLIxPQj/SNMUa2FKbe0MxO6KmEYLKcGSDE=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=SijKz92KhGt9BpLVx97Eb6EaEFC7Ge9Q75JprWDbWU0UYrl8maGmffg7FjBApXGwXynPdBwEQIbTRP+TAM/9tr85oLBDiq65P1iebYe9FqfSs+/5UoQwe7yD3N1eZ4xEcSZlKh3EkEpuOEQi5wsWnXGjqR8MMZ4Xf70edZIocUw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=mt-integration.ru; spf=pass smtp.mailfrom=mt-integration.ru; dkim=pass (2048-bit key) header.d=mt-integration.ru header.i=@mt-integration.ru header.b=geHrIMk1; arc=none smtp.client-ip=81.200.124.38 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=mt-integration.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mt-integration.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mt-integration.ru header.i=@mt-integration.ru header.b="geHrIMk1" Received: from ksmg01.maxima.ru (localhost [127.0.0.1]) by ksmg01.maxima.ru (Postfix) with ESMTP id CCCB8C0019; Thu, 3 Apr 2025 11:20:39 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 ksmg01.maxima.ru CCCB8C0019 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mt-integration.ru; s=sl; t=1743668439; bh=YTS2HHkGl6vv90e1u0OfipkGJc4P/NO4h3v6E9uRqq4=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:From; b=geHrIMk1MGDCl+aVe19qoNl946keFH3Np8EziP6hHBi2NgIICG6cAUi/XpTRUCQ5U G9frMkHkTw5Y7dDyeMeGfzeqMk2edT2K/2x2UGyyzgQ4M5xkt29Mwmlp2TL+nAb30q 1nHltz/X5y/oZXp/bMeSwvNKN0ACrksGmGQhjr7k0kYF6ymRIWrBdYs9fJu4abrLpp 28FduAw2yvOTnkcYON4HDy2PYxCzfBuW35+5XYwE6dbmLysiKbMGh+dLH6ZlyX0aJS CkzPOMahqac3Yi1EISt0ZvTLlFrysqVuBBqsEOtkGcLzCP2+Rg8VNg53A0t4F02fyB ZeH8BSGbFWG8Q== Received: from ksmg01.maxima.ru (autodiscover.maxima.ru [81.200.124.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.maxima.ru", Issuer "GlobalSign GCC R3 DV TLS CA 2020" (verified OK)) by ksmg01.maxima.ru (Postfix) with ESMTPS; Thu, 3 Apr 2025 11:20:39 +0300 (MSK) Received: from db126-1-abramov-14-d-mosos.mti-lab.com (172.25.20.118) by mmail-p-exch01.mt.ru (81.200.124.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Thu, 3 Apr 2025 11:20:39 +0300 From: Ivan Abramov To: Alexander Aring CC: Ivan Abramov , Stefan Schmidt , Miquel Raynal , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , , , , Subject: [PATCH net v2 1/3] ieee802154: Restore initial state on failed device_rename() in cfg802154_switch_netns() Date: Thu, 3 Apr 2025 11:20:19 +0300 Message-ID: <20250403082021.990667-2-i.abramov@mt-integration.ru> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250403082021.990667-1-i.abramov@mt-integration.ru> References: <20250403082021.990667-1-i.abramov@mt-integration.ru> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: mmail-p-exch02.mt.ru (81.200.124.62) To mmail-p-exch01.mt.ru (81.200.124.61) X-KSMG-AntiPhishing: NotDetected X-KSMG-AntiSpam-Auth: dmarc=none header.from=mt-integration.ru;spf=none smtp.mailfrom=mt-integration.ru;dkim=none X-KSMG-AntiSpam-Envelope-From: i.abramov@mt-integration.ru X-KSMG-AntiSpam-Info: LuaCore: 54 0.3.54 464169e973265e881193cca5ab7aa5055e5b7016, {rep_avail}, {Tracking_from_domain_doesnt_match_to}, 81.200.124.61:7.1.2;ksmg01.maxima.ru:7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;mt-integration.ru:7.1.1;127.0.0.199:7.1.2, FromAlignment: s, ApMailHostAddress: 81.200.124.61 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiSpam-Lua-Profiles: 192326 [Apr 03 2025] X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Version: 6.1.1.11 X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.1.1.8310, bases: 2025/04/03 03:59:00 #27851158 X-KSMG-AntiVirus-Status: NotDetected, skipped X-KSMG-LinksScanning: NotDetected X-KSMG-Message-Action: skipped X-KSMG-Rule-ID: 7 Content-Type: text/plain; charset="utf-8" Currently, the return value of device_rename() is not acted upon. To avoid an inconsistent state in case of failure, roll back the changes made before the device_rename() call. Found by Linux Verification Center (linuxtesting.org) with Syzkaller. Fixes: 66e5c2672cd1 ("ieee802154: add netns support") Signed-off-by: Ivan Abramov --- v2: Make sure to commit against latest netdev/net. net/ieee802154/core.c | 45 ++++++++++++++++++++++++------------------- 1 file changed, 25 insertions(+), 20 deletions(-) diff --git a/net/ieee802154/core.c b/net/ieee802154/core.c index 89b671b12600..84d514430e45 100644 --- a/net/ieee802154/core.c +++ b/net/ieee802154/core.c @@ -233,31 +233,36 @@ int cfg802154_switch_netns(struct cfg802154_registere= d_device *rdev, wpan_dev->netdev->netns_immutable =3D true; } =20 - if (err) { - /* failed -- clean up to old netns */ - net =3D wpan_phy_net(&rdev->wpan_phy); - - list_for_each_entry_continue_reverse(wpan_dev, - &rdev->wpan_dev_list, - list) { - if (!wpan_dev->netdev) - continue; - wpan_dev->netdev->netns_immutable =3D false; - err =3D dev_change_net_namespace(wpan_dev->netdev, net, - "wpan%d"); - WARN_ON(err); - wpan_dev->netdev->netns_immutable =3D true; - } - - return err; - } - - wpan_phy_net_set(&rdev->wpan_phy, net); + if (err) + goto errout; =20 err =3D device_rename(&rdev->wpan_phy.dev, dev_name(&rdev->wpan_phy.dev)); WARN_ON(err); =20 + if (err) + goto errout; + + wpan_phy_net_set(&rdev->wpan_phy, net); + return 0; + +errout: + /* failed -- clean up to old netns */ + net =3D wpan_phy_net(&rdev->wpan_phy); + + list_for_each_entry_continue_reverse(wpan_dev, + &rdev->wpan_dev_list, + list) { + if (!wpan_dev->netdev) + continue; + wpan_dev->netdev->netns_immutable =3D false; + err =3D dev_change_net_namespace(wpan_dev->netdev, net, + "wpan%d"); + WARN_ON(err); + wpan_dev->netdev->netns_immutable =3D true; + } + + return err; } =20 void cfg802154_dev_free(struct cfg802154_registered_device *rdev) --=20 2.39.5 From nobody Thu Apr 10 20:44:23 2025 Received: from ksmg01.maxima.ru (ksmg01.maxima.ru [81.200.124.38]) (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 9886024169D; Thu, 3 Apr 2025 08:20:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=81.200.124.38 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743668448; cv=none; b=njDI6c5W0cun9OxxTzJzReIZAgg5DIDY6sofbZNPd8/uOac2LfZmR2EYJ+kSHk16Hr62T5xdDEMJkZb+CWT02EA9vthewDnI8t3Lia5wIUSK6e1PYpjrgjUNX+Y1F4KyqTSkouF4ggSaRQ00pTgSMijBwK9U8hEd+RGbEvvSSM8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743668448; c=relaxed/simple; bh=SB7Kn52oYQ248jEmcpDOI//T3/m6hPEZlOSJZ2uEp+A=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Q1A3MGGebZPdLliPF7yruTc4uBdsQHYP6O3dmkg2M6j3gHA1HvInIunucbr698mp5teK37NCgKoTDdxZExgeRTmUfsWhDxKJy/LbcgvRcLN9ipTT3ccf4xV0dBUlJ728ewzpWz7APv+TzCVBg90a3ChPu21dEv/yGLFgHhJcSPo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=mt-integration.ru; spf=pass smtp.mailfrom=mt-integration.ru; dkim=pass (2048-bit key) header.d=mt-integration.ru header.i=@mt-integration.ru header.b=RfB3VLRT; arc=none smtp.client-ip=81.200.124.38 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=mt-integration.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mt-integration.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mt-integration.ru header.i=@mt-integration.ru header.b="RfB3VLRT" Received: from ksmg01.maxima.ru (localhost [127.0.0.1]) by ksmg01.maxima.ru (Postfix) with ESMTP id 5F5EDC001E; Thu, 3 Apr 2025 11:20:42 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 ksmg01.maxima.ru 5F5EDC001E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mt-integration.ru; s=sl; t=1743668442; bh=fooqjpgdl4KPLJhSgTy90MCWqkARgoelhKCc0ecb9V8=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:From; b=RfB3VLRT6NkOcpK2wDkP7IVZTIf68Iz7/eiU26ppbOgEXB9NsffT5Qc3gf0qFbVJV QeooItlcfE3IIML6crna89MORBFUxvI3Rwqy8UdCnI+OGa/idN0Z5zOhUtGex/Cbz2 ll2IHeYOS4eYduXbWQkF5/nDePlBwNLkCF544lXi8LS6U1Y8VnAq+GUdB85Tu4wBtD ptPJnxh5hStN7FH9fXwxYx6RzKYxNVEZvd+VtYETLtdI1xVjEPqSvCjjGVON+DxZrz 0VL5kFLLK7xbavxrCSomPn9CJ0C0I+Tit3ib+APpBOSfdoAJk462b0aPn8HcLTiI+o xjRHYPAbuaung== Received: from ksmg01.maxima.ru (autodiscover.maxima.ru [81.200.124.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.maxima.ru", Issuer "GlobalSign GCC R3 DV TLS CA 2020" (verified OK)) by ksmg01.maxima.ru (Postfix) with ESMTPS; Thu, 3 Apr 2025 11:20:42 +0300 (MSK) Received: from db126-1-abramov-14-d-mosos.mti-lab.com (172.25.20.118) by mmail-p-exch01.mt.ru (81.200.124.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Thu, 3 Apr 2025 11:20:41 +0300 From: Ivan Abramov To: Alexander Aring CC: Ivan Abramov , , Stefan Schmidt , Miquel Raynal , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , , , , Subject: [PATCH net v2 2/3] ieee802154: Avoid calling WARN_ON() on -ENOMEM in cfg802154_switch_netns() Date: Thu, 3 Apr 2025 11:20:20 +0300 Message-ID: <20250403082021.990667-3-i.abramov@mt-integration.ru> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250403082021.990667-1-i.abramov@mt-integration.ru> References: <20250403082021.990667-1-i.abramov@mt-integration.ru> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: mmail-p-exch02.mt.ru (81.200.124.62) To mmail-p-exch01.mt.ru (81.200.124.61) X-KSMG-AntiPhishing: NotDetected, bases: 2025/04/03 06:59:00 X-KSMG-AntiSpam-Auth: dmarc=none header.from=mt-integration.ru;spf=none smtp.mailfrom=mt-integration.ru;dkim=none X-KSMG-AntiSpam-Envelope-From: i.abramov@mt-integration.ru X-KSMG-AntiSpam-Info: LuaCore: 54 0.3.54 464169e973265e881193cca5ab7aa5055e5b7016, {rep_avail}, {Tracking_uf_ne_domains}, {Tracking_from_domain_doesnt_match_to}, 81.200.124.61:7.1.2;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;ksmg01.maxima.ru:7.1.1;127.0.0.199:7.1.2;lore.kernel.org:7.1.1;mt-integration.ru:7.1.1, FromAlignment: s, ApMailHostAddress: 81.200.124.61 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiSpam-Lua-Profiles: 192326 [Apr 03 2025] X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Version: 6.1.1.11 X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.1.1.8310, bases: 2025/04/03 03:59:00 #27851158 X-KSMG-AntiVirus-Status: NotDetected, skipped X-KSMG-LinksScanning: NotDetected, bases: 2025/04/03 06:59:00 X-KSMG-Message-Action: skipped X-KSMG-Rule-ID: 7 Content-Type: text/plain; charset="utf-8" It's pointless to call WARN_ON() in case of an allocation failure in dev_change_net_namespace() and device_rename(), since it only leads to useless splats caused by deliberate fault injections, so avoid it. Found by Linux Verification Center (linuxtesting.org) with Syzkaller. Reported-by: syzbot+e0bd4e4815a910c0daa8@syzkaller.appspotmail.com Closes: https://lore.kernel.org/netdev/000000000000f4a1b7061f9421de@google.= com/#t Fixes: 66e5c2672cd1 ("ieee802154: add netns support") Signed-off-by: Ivan Abramov --- v2: Add Reported-by and Closes tags as per Kuniyuki Iwashima's observation. Make sure to commit against latest netdev/net. net/ieee802154/core.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/net/ieee802154/core.c b/net/ieee802154/core.c index 84d514430e45..987c633e2c54 100644 --- a/net/ieee802154/core.c +++ b/net/ieee802154/core.c @@ -228,8 +228,10 @@ int cfg802154_switch_netns(struct cfg802154_registered= _device *rdev, continue; wpan_dev->netdev->netns_immutable =3D false; err =3D dev_change_net_namespace(wpan_dev->netdev, net, "wpan%d"); - if (err) + if (err) { + WARN_ON(err && err !=3D -ENOMEM); break; + } wpan_dev->netdev->netns_immutable =3D true; } =20 @@ -237,7 +239,7 @@ int cfg802154_switch_netns(struct cfg802154_registered_= device *rdev, goto errout; =20 err =3D device_rename(&rdev->wpan_phy.dev, dev_name(&rdev->wpan_phy.dev)); - WARN_ON(err); + WARN_ON(err && err !=3D -ENOMEM); =20 if (err) goto errout; @@ -258,7 +260,7 @@ int cfg802154_switch_netns(struct cfg802154_registered_= device *rdev, wpan_dev->netdev->netns_immutable =3D false; err =3D dev_change_net_namespace(wpan_dev->netdev, net, "wpan%d"); - WARN_ON(err); + WARN_ON(err && err !=3D -ENOMEM); wpan_dev->netdev->netns_immutable =3D true; } =20 --=20 2.39.5 From nobody Thu Apr 10 20:44:23 2025 Received: from ksmg01.maxima.ru (ksmg01.mt-integration.ru [81.200.124.38]) (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 00CDD1EF092; Thu, 3 Apr 2025 08:20:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=81.200.124.38 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743668455; cv=none; b=XOFVyaohMQW+0o3XrBMgzPq096KSGI0G7sy74BanoGNMFcbWnwh9JFx7cyZjn1QJO7S9dIRkhUxx1S1uuxPOw3e6rlLysIUbVrHJfrNk/GUXXe2e0BQr6XNVPRaCzv4Pvsvfpef0eGRQZCoLpixWSRSoYV1MKsRB3tSfkycSSuI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743668455; c=relaxed/simple; bh=hYguFZf3M2XdqtUWTyrLfBqwL6zkdSKwtDJgLxELEms=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=niJt4g4n5iPBFcNTUBs75WyKRE8fSOqkFo3s3DtzeZpUYnkEW+OzlPhrSwxjJApTPhqvBWdf9zH0Q8NbUqTkF/1ypy5zfxc4gZFf3vm//K/RTiER7UPimSV8MN2l8wFeXzix9AkAOeVXHYpBhkIjeAK0KoYOWRNAqS38V2eogiQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=mt-integration.ru; spf=pass smtp.mailfrom=mt-integration.ru; dkim=pass (2048-bit key) header.d=mt-integration.ru header.i=@mt-integration.ru header.b=SE7G4reX; arc=none smtp.client-ip=81.200.124.38 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=mt-integration.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mt-integration.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mt-integration.ru header.i=@mt-integration.ru header.b="SE7G4reX" Received: from ksmg01.maxima.ru (localhost [127.0.0.1]) by ksmg01.maxima.ru (Postfix) with ESMTP id B1AACC0004; Thu, 3 Apr 2025 11:20:51 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 ksmg01.maxima.ru B1AACC0004 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mt-integration.ru; s=sl; t=1743668451; bh=0eT+To4WS8QTolUNabbkxlBAmdHPmc3Q+qNiBLxRA/g=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:From; b=SE7G4reX6EOLjSR20sYKhGdMnDrN3rSskQgAnzvbTu8/dr8RtGFvgV5vmj/1VOfm3 WNMHFwSY1HoxfkQATdTfOmAppZ4WHAZNm5MRvqUDCw+R3qLoUTkLJQrValQLzSE4NX gnLSoobElCpoU4rNEDu1Q4rE8aa7U3TT1Ot677z8Uy73BYJg7giLzZwWopbUwGK7Lh KZ9raGobo+bYRyp0ZbDtYXcIzeqPc1v99yLUNFwhi2Hv8BVqu/QQ/63TkU9VkqYuum Abevqk69zjNjS7SQbn2948uKgPU2H/kKT2QJzdxHHonXyHH4b0zD4aL/wHlR3xV6pH wtPpHVFNvt6IQ== Received: from ksmg01.maxima.ru (mail.maxima.ru [81.200.124.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.maxima.ru", Issuer "GlobalSign GCC R3 DV TLS CA 2020" (verified OK)) by ksmg01.maxima.ru (Postfix) with ESMTPS; Thu, 3 Apr 2025 11:20:51 +0300 (MSK) Received: from db126-1-abramov-14-d-mosos.mti-lab.com (172.25.20.118) by mmail-p-exch01.mt.ru (81.200.124.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.4; Thu, 3 Apr 2025 11:20:50 +0300 From: Ivan Abramov To: Alexander Aring CC: Ivan Abramov , Stefan Schmidt , Miquel Raynal , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , , , , Subject: [PATCH net v2 3/3] ieee802154: Remove WARN_ON() in cfg802154_pernet_exit() Date: Thu, 3 Apr 2025 11:20:21 +0300 Message-ID: <20250403082021.990667-4-i.abramov@mt-integration.ru> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250403082021.990667-1-i.abramov@mt-integration.ru> References: <20250403082021.990667-1-i.abramov@mt-integration.ru> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: mmail-p-exch02.mt.ru (81.200.124.62) To mmail-p-exch01.mt.ru (81.200.124.61) X-KSMG-AntiPhishing: NotDetected X-KSMG-AntiSpam-Auth: dmarc=none header.from=mt-integration.ru;spf=none smtp.mailfrom=mt-integration.ru;dkim=none X-KSMG-AntiSpam-Envelope-From: i.abramov@mt-integration.ru X-KSMG-AntiSpam-Info: LuaCore: 54 0.3.54 464169e973265e881193cca5ab7aa5055e5b7016, {rep_avail}, {Tracking_from_domain_doesnt_match_to}, 81.200.124.61:7.1.2;ksmg01.maxima.ru:7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;mt-integration.ru:7.1.1;127.0.0.199:7.1.2, FromAlignment: s, ApMailHostAddress: 81.200.124.61 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiSpam-Lua-Profiles: 192326 [Apr 03 2025] X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Version: 6.1.1.11 X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.1.1.8310, bases: 2025/04/03 03:59:00 #27851158 X-KSMG-AntiVirus-Status: NotDetected, skipped X-KSMG-LinksScanning: NotDetected X-KSMG-Message-Action: skipped X-KSMG-Rule-ID: 7 Content-Type: text/plain; charset="utf-8" There's no need to call WARN_ON() in cfg802154_pernet_exit(), since every point of failure in cfg802154_switch_netns() is covered with WARN_ON(), so remove it. Found by Linux Verification Center (linuxtesting.org) with Syzkaller. Fixes: 66e5c2672cd1 ("ieee802154: add netns support") Signed-off-by: Ivan Abramov --- v2: Make sure to commit against latest netdev/net. net/ieee802154/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ieee802154/core.c b/net/ieee802154/core.c index 987c633e2c54..c0b8712018a1 100644 --- a/net/ieee802154/core.c +++ b/net/ieee802154/core.c @@ -358,7 +358,7 @@ static void __net_exit cfg802154_pernet_exit(struct net= *net) rtnl_lock(); list_for_each_entry(rdev, &cfg802154_rdev_list, list) { if (net_eq(wpan_phy_net(&rdev->wpan_phy), net)) - WARN_ON(cfg802154_switch_netns(rdev, &init_net)); + cfg802154_switch_netns(rdev, &init_net); } rtnl_unlock(); } --=20 2.39.5