From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 CBA4F29C321; Mon, 9 Feb 2026 14:30:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770647415; cv=none; b=BRHu09Srg64YL7axMwq+JUx8n0fDYMc8eNzPJ9alh+/yQtWtO2ILFM6nTxnHU3F5dwykKTMPeSWmgg6Qh0HYXflFxFXydi6yNlEQzhOUWeutgluw1B1sjvlOL02KZfUIqPBrTtMzjJanZ9BjPShxvbm6nwSbLA2ZF0LcdCLp9s0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770647415; c=relaxed/simple; bh=2wB+TbDSNYosdC+MJ0q1ayaR0FBAur6fjDw0DOL03mk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=DKno4jMo0ktxez8EfZUeWWwMUCZLeWnaZH5fJ9eKlXhwAygfEQKHzDfiW98PgtZCDzGNrxBFGafxY+IFXAddN3FNqB0XlqEbyMWm9xz9BUgX8mUYDAHVq4ObxPi/IhsSlCtwudrFKj0xqh7ZvHjLv5YV1+sy9QuGOjK6bJ9idoU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=WwG4XYzZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="WwG4XYzZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 47C0FC116C6; Mon, 9 Feb 2026 14:30:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1770647415; bh=2wB+TbDSNYosdC+MJ0q1ayaR0FBAur6fjDw0DOL03mk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WwG4XYzZzjA4yC25GrqnjZ7E6pvs0ARnnTwW0PpArmkC0opFbZfybJAjBeWbEftS6 h6qkbUncN+2WHNrbA2fHaYm9URCFDuwAoTAA4NT1cbxJ9YefqLfIaefS/0O36colbn +SM+/7PwBYmTyRrSHYofpdB3tvZL1hXLqehQBqKA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Peter Astrand , Johannes Berg , Sasha Levin Subject: [PATCH 6.18 049/175] wifi: wlcore: ensure skb headroom before skb_push Date: Mon, 9 Feb 2026 15:22:02 +0100 Message-ID: <20260209142322.235668305@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260209142320.474120190@linuxfoundation.org> References: <20260209142320.474120190@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Peter Åstrand [ Upstream commit e75665dd096819b1184087ba5718bd93beafff51 ] This avoids occasional skb_under_panic Oops from wl1271_tx_work. In this case, headroom is less than needed (typically 110 - 94 = 16 bytes). Signed-off-by: Peter Astrand Link: https://patch.msgid.link/097bd417-e1d7-acd4-be05-47b199075013@lysator.liu.se Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- drivers/net/wireless/ti/wlcore/tx.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/wireless/ti/wlcore/tx.c b/drivers/net/wireless/ti/wlcore/tx.c index 464587d16ab20..f251627c24c6e 100644 --- a/drivers/net/wireless/ti/wlcore/tx.c +++ b/drivers/net/wireless/ti/wlcore/tx.c @@ -207,6 +207,11 @@ static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif, total_blocks = wlcore_hw_calc_tx_blocks(wl, total_len, spare_blocks); if (total_blocks <= wl->tx_blocks_available) { + if (skb_headroom(skb) < (total_len - skb->len) && + pskb_expand_head(skb, (total_len - skb->len), 0, GFP_ATOMIC)) { + wl1271_free_tx_id(wl, id); + return -EAGAIN; + } desc = skb_push(skb, total_len - skb->len); wlcore_hw_set_tx_desc_blocks(wl, desc, total_blocks, -- 2.51.0