From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 55E52202F70; Sat, 17 Oct 2026 16:31:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792254689; cv=none; b=GxA3yhZUX9aKCl5x2e6pv2iwWmLs2jOb9Cj726EMtzXm3xkrQ4rDEyTUf1xxWp4mZBSeXTY8ZJBcSRyLy3UByTaw623449b/WJqC8X6czwPmFTZcA9XmfKbE2QW0QyFDApOrIXU7DCp3R6S93+9Hi5NmoNhZ5+LrftI8zcz7Qx4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792254689; c=relaxed/simple; bh=zbfnBZIZI+oCA87O5QJEKzZUZo01WGeIBV8CC8DHUps=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=J8vtDV80ok4h2vWOrjwj93tL9/3NY23ZqtslJ1SxL8hwPmJ0LsDJ/YSrcfhD13c/fwfbAbFAKDwepk4o/pMVHDtm6w8uRdqCoZFYbiZyn2i5YjCgXI1NiNfm5biu8j7Td6mCnMjJjREzTsx+2Gb2QlbFtg2mw6CWWhFvdO02dOg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=0MjaU72S; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="0MjaU72S" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B655E1F000C4; Sat, 17 Oct 2026 16:31:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792254688; bh=91O2DPFlfnkghISI46AYYhuxZ/y6rQxWNKEfCEKdOTg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=0MjaU72SbjWv5yvE9AnCQNNvaaDxyE0UW9Ec+QSwJAAWdApN29BpUSaBW0mHSRCwB v9GskQPm/+xcNyO7GFIuc8foP8TVfNnyCLC9wyfRkZ3hgFF2XaZi1kdbxQPLo1BttH T3QLEDtYHrmwbISc+JqPaJp8AKerLv++nP77mTCY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+e0bd4e4815a910c0daa8@syzkaller.appspotmail.com, Kuniyuki Iwashima , Miquel Raynal , Ivan Abramov , Stefan Schmidt , Sasha Levin Subject: [PATCH 6.12 530/869] ieee802154: Avoid calling WARN_ON() on -ENOMEM in cfg802154_switch_netns() Date: Sat, 17 Oct 2026 17:56:11 +0200 Message-ID: <20261017160050.697570555@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261017160036.979869304@linuxfoundation.org> References: <20261017160036.979869304@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ivan Abramov [ Upstream commit 0569f67ed6a7af838e2141da93c68e6b6013f483 ] 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. Fixes: 66e5c2672cd1 ("ieee802154: add netns support") Reported-by: syzbot+e0bd4e4815a910c0daa8@syzkaller.appspotmail.com Closes: https://lore.kernel.org/netdev/000000000000f4a1b7061f9421de@google.com/#t Reviewed-by: Kuniyuki Iwashima Reviewed-by: Miquel Raynal Signed-off-by: Ivan Abramov Link: https://lore.kernel.org/20250403101935.991385-3-i.abramov@mt-integration.ru Signed-off-by: Stefan Schmidt Signed-off-by: Sasha Levin --- net/ieee802154/core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/ieee802154/core.c b/net/ieee802154/core.c index 4a4379c828b90..9b807f78a3105 100644 --- a/net/ieee802154/core.c +++ b/net/ieee802154/core.c @@ -245,7 +245,7 @@ int cfg802154_switch_netns(struct cfg802154_registered_device *rdev, wpan_dev->netdev->netns_local = false; err = dev_change_net_namespace(wpan_dev->netdev, net, "wpan%d"); - WARN_ON(err); + WARN_ON(err && err != -ENOMEM); wpan_dev->netdev->netns_local = true; } @@ -255,7 +255,7 @@ int cfg802154_switch_netns(struct cfg802154_registered_device *rdev, wpan_phy_net_set(&rdev->wpan_phy, net); err = device_rename(&rdev->wpan_phy.dev, dev_name(&rdev->wpan_phy.dev)); - WARN_ON(err); + WARN_ON(err && err != -ENOMEM); return 0; } -- 2.53.0