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 324DC44C518; Thu, 30 Jul 2026 15:30:13 +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=1785425417; cv=none; b=ewCvC+SnMGwnnHOdEO4icU1wsQEN33uzn9+YSZE7PIk3kQvMtaUhcaavzMazbn3kkEYeDD4Fmr9+0jjKf2VUSxRyzIqppvySkWAsVkM/5r1sRwmAqlJUHOdHoAqY8AsvWH+18YOD8n2F/RP8BYvTO2RM1WkMusqHPaiC5IEprJs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785425417; c=relaxed/simple; bh=IM+sUqmSQz5EYrNvzgAdCPmxWU5eKdQTsuWOau/9KiA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CjvGGGjkf66DPdNa2srwMZETMD5ss+nH/2SFS0k+rQkc42UNdvWBe5Kh3owzXU+fTv7nWFeuAxhi8GzOwgbDryj2z1Chig1O//pFb0bQmmB8cWl/xnJWQjFeNWxHZarfITL/sSVMIgLX6+T0i5jWQt0en+WLgcQZ7L4Li3PlaCw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=j7OsfWxh; 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="j7OsfWxh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A11F71F00A3A; Thu, 30 Jul 2026 15:30:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1785425412; bh=40I2ApnP4WQwyPX3k27o+Ze6Pr+Sf6YLFNgvOH3Tu5c=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=j7OsfWxhb1EzyhzAvobMuvqBwu3GkvEQn/Xar50H8wd3vhlFYwylsIDBIvDgSPdmc gkyuycTg0hQkAbZxYCIOIzBrXmz//SL2GNwsS1l3wcto7cNjUoZeq5GnL1F6Z+0Bit e1A4nNkCaaXhO5P7JXHpDwiamOvFM2lN2m7EuRBY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Unnathi Chalicheemala , Sudeep Holla , Sasha Levin Subject: [PATCH 6.12 043/602] firmware: arm_ffa: Fix NULL dereference in ffa_partition_info_get() Date: Thu, 30 Jul 2026 16:07:15 +0200 Message-ID: <20260730141436.910898094@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260730141435.976815864@linuxfoundation.org> References: <20260730141435.976815864@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: Unnathi Chalicheemala [ Upstream commit 8ae5f8e4836667fcaffdf2e3c6068b0a8b364dd8 ] ffa_partition_info_get() passes uuid_str directly to uuid_parse() without a NULL check. When a caller passes NULL, uuid_parse() -> __uuid_parse() -> uuid_is_valid() dereferences the pointer, causing a kernel panic: | Unable to handle kernel NULL pointer dereference at virtual address | 0000000000000040 | pc : uuid_parse+0x40/0xac | lr : ffa_partition_info_get+0x1c/0x94 [arm_ffa] Add a NULL guard before uuid_parse() so a NULL argument returns -ENODEV instead of crashing. Callers are expected to always supply a valid partition UUID, so NULL is not a supported input. Fixes: d0c0bce83122 ("firmware: arm_ffa: Setup in-kernel users of FFA partitions") Signed-off-by: Unnathi Chalicheemala Link: https://patch.msgid.link/20260617-ffa_partition_nullptr_fix-v2-1-bc801b4ce34c@oss.qualcomm.com Signed-off-by: Sudeep Holla Signed-off-by: Sasha Levin --- drivers/firmware/arm_ffa/driver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 67fc9e46001b77..62222c9cfc3e6d 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -1029,7 +1029,7 @@ static int ffa_partition_info_get(const char *uuid_str, uuid_t uuid; struct ffa_partition_info *pbuf; - if (uuid_parse(uuid_str, &uuid)) { + if (!uuid_str || uuid_parse(uuid_str, &uuid)) { pr_err("invalid uuid (%s)\n", uuid_str); return -ENODEV; } -- 2.53.0