From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794064012; b=kwa5mIPsw44evYThvPOWmdbEhqzjT80/jvjofwwqUWP3ub534BELBBnrKJZmMGkv8j+H ceXsSl3Mu4dV0x8JAxNGZzUq/RaieKMBtfZfI061pfVAleY6gzAEPY+2PodFarkDGXgfW qwEoKwFIcwXxK4CKVIjqXF//QM+cbyrU7KNiiPbgq7ONKwCKN26b9TLKsSTOuu1NrLXn6 RxgF1jIpADdnynsr5BJBQLtDtiJ0fOwy0Cl0gsFhIAW5pGAplxA/pvndSXeqf9MZIWwr9 fgMJmYWR/r9ZOhWH8xI2GKgzeQRHTxmZYqMKKwY/byeOAkUE0JIlABRWie6eqU0dU/Q== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794064012; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=01NRPBj8mtUges7Wc3KS2LFmopn1+/ZzR1I9ZO0jMKQ=; b=IifqERFBuIWqBeNxBey1g3g/2OL79fZ8NiLhOlHczUIlqZ83a5Dp26/Ao2tCgCMMdSJn CxbIN1fPeyCxM3waQ9iOdJWRa54/Ej6BE5SZCp0E4Q/vXgBubOd3un8uU27NOqL+MFS93 0qPJHtvM8MJwoCQCcc6uBpahJpo/n5HGsz2IYlZ9/YM2e9+MiywLHVWa+XsxwrEeWG1+h +r3cymCb0VIb7ZLoUfCHDH4PCgSKDaK7T8TlW244gXJkEhhLu5FiYJaTaKwQ4Qp9NcHeM HOqSnrL3p7IpOqnjBu5xeA45LbIMIlY+/C8Dy2dQ/5IpD9Da6A8Eke8oPXoBbf9L7dg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=jX7Gu1e1; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0C7A7606A9C0; Sat, 7 Nov 2026 15:06:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=jX7Gu1e1 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6EA151F0089F; Sat, 7 Nov 2026 15:06:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794064011; bh=01NRPBj8mtUges7Wc3KS2LFmopn1+/ZzR1I9ZO0jMKQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=jX7Gu1e1+Vb89M5hdD9Q18YdgP1XBkeGYxsalWRw7CZ9hW3WyyjX9YvOxdmQSznlQ V1dfs08A4sxPVrRkReZJ+b/jB2Vu3RwrJju/1tG7gJwPu4vgNCXUjENbwjUrw1PQ42 4DEf1XQhx6ZGpBOglMQCiTY8d/Ow84kNuPowwPww= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thomas Zimmermann , Javier Martinez Canillas , Jocelyn Falempe , dri-devel@lists.freedesktop.org, Sasha Levin Subject: [PATCH 7.3 0190/1257] drm/panic: Test address from kmap op for NULL Date: Sat, 7 Nov 2026 08:41:26 -0500 Message-ID: <20261107134944.705597912@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134939.434104957@linuxfoundation.org> References: <20261107134939.434104957@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.3-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thomas Zimmermann [ Upstream commit 6a6304ec3ceee879e3a2545b217eb11c8b7870e5 ] Do nothing if kmap_local_page_try_from_panic() returns NULL. This is not likely to hapen, as the previous page from the same memory area has been mapped successfully. Signed-off-by: Thomas Zimmermann Fixes: 23437509a694 ("drm/panic: Fix 24bit pixel crossing page boundaries") Cc: Javier Martinez Canillas Cc: Jocelyn Falempe Cc: dri-devel@lists.freedesktop.org Cc: # v6.18+ Reviewed-by: Javier Martinez Canillas Link: https://patch.msgid.link/20260911124540.279841-3-tzimmermann@suse.de Signed-off-by: Sasha Levin --- drivers/gpu/drm/drm_panic.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c index ba21df4be3380..d28ce8878e055 100644 --- a/drivers/gpu/drm/drm_panic.c +++ b/drivers/gpu/drm/drm_panic.c @@ -178,6 +178,8 @@ static void drm_panic_write_pixel24_xpage(void *vaddr, struct page *next_page, u8 *p = vaddr + offset; vaddr2 = kmap_local_page_try_from_panic(next_page); + if (!vaddr2) + return; *p++ = color & 0xff; color >>= 8; -- 2.53.0