From nobody Wed Oct 15 22:31:21 2025 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 4231627A820; Sun, 24 Mar 2024 23:38:08 +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=1711323489; cv=none; b=hZ14bLAG5krcbKs7NBMWP29MmiogoejNKzHs0etZS2KPjlt3XXq2UkuULIqRScl/BXHRuHAQx51Bwo4rjAdUjfxwSSN+YR4p7H1DWUCEMcnP4lEqDFKD18CwduOmnB9espS9MbneEGR1B/M0WMyEUWNz6uOwlnKrzi20vnzqR2s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711323489; c=relaxed/simple; bh=vHZPofxw8AN48sAFxEHgXaF8fZSmhRexjjuE+y/44oY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Wfy8pMiwKeDWFcZObo/5vzfLYQnqOjKAtBEEs4nJjJZf8NMnnw1xDSMFXfO3/U9oBg8Zlr3aa7c4y02lJvTRfYGONsBS0jSH9hUjM5WTFGIQvoOfWw+PqAWASXccbCCn0Nf9sutFFqKySf2xNKSuTlTEVWLyMrI0vpaJeJYX/XI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=A1uVzA2N; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="A1uVzA2N" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6D6C3C43390; Sun, 24 Mar 2024 23:38:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711323488; bh=vHZPofxw8AN48sAFxEHgXaF8fZSmhRexjjuE+y/44oY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=A1uVzA2NDv7+OyFn/bIjCv7PoJbWvxWZkHJKu7CmLvrGwd76FNBDhlcrs38Zhfy5g 1S4fGu06tWRNb87wGoZyAXS22TA2c59n6eUb4p2AjpjRyNBqlBa8Aw+3VT8oM02U3w 8gtk5iBQZB21Q/0lL5sLa8AMsX22hGXP2ogJbQkuVjAOSRsG1v9LT0zAYXHvLoe0uC IZKVIXP6zmEVp2767g0h+TdAjmEdBn+ydLYkwJ2ruS7a7cieyvtVFWRK1eKO/vGBYe 02rIVrEMK3qQlFDmGoQ4L9NpRgqXakv9z1MG71VQl+2WpzkxAIZYeGtqPOA66zJmuV XuhnXi6TKjmPQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Christophe JAILLET , Bjorn Helgaas , Logan Gunthorpe , Sasha Levin Subject: [PATCH 5.15 193/317] PCI/P2PDMA: Fix a sleeping issue in a RCU read section Date: Sun, 24 Mar 2024 19:32:53 -0400 Message-ID: <20240324233458.1352854-194-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240324233458.1352854-1-sashal@kernel.org> References: <20240324233458.1352854-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Christophe JAILLET [ Upstream commit 1e5c66afd4a40bb7be17cb33cbb1a1085f727730 ] It is not allowed to sleep within a RCU read section, so use GFP_ATOMIC instead of GFP_KERNEL here. Link: https://lore.kernel.org/r/02d9ec4a10235def0e764ff1f5be881ba12e16e8.17= 04397858.git.christophe.jaillet@wanadoo.fr Fixes: ae21f835a5bd ("PCI/P2PDMA: Finish RCU conversion of pdev->p2pdma") Signed-off-by: Christophe JAILLET Signed-off-by: Bjorn Helgaas Reviewed-by: Logan Gunthorpe Signed-off-by: Sasha Levin --- drivers/pci/p2pdma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c index 316fd2f44df45..57654c82b08e8 100644 --- a/drivers/pci/p2pdma.c +++ b/drivers/pci/p2pdma.c @@ -536,7 +536,7 @@ calc_map_type_and_dist(struct pci_dev *provider, struct= pci_dev *client, p2pdma =3D rcu_dereference(provider->p2pdma); if (p2pdma) xa_store(&p2pdma->map_types, map_types_idx(client), - xa_mk_value(map_type), GFP_KERNEL); + xa_mk_value(map_type), GFP_ATOMIC); rcu_read_unlock(); return map_type; } --=20 2.43.0