linux-kernel - [PATCH] interconnect: qcom: icc-rpm: Set the count member before accessing the flex array

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20241203223334.233404-1-djakov@kernel.org>
Date: Wed,  4 Dec 2024 00:33:34 +0200
From: djakov@...nel.org
To: naresh.kamboju@...aro.org,
	lkft@...aro.org,
	nathan@...nel.org,
	djakov@...nel.org
Cc: kees@...nel.org,
	konradybcio@...nel.org,
	quic_okukatla@...cinc.com,
	quic_rlaggysh@...cinc.com,
	linux-arm-msm@...r.kernel.org,
	linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] interconnect: qcom: icc-rpm: Set the count member before accessing the flex array

From: Georgi Djakov <djakov@...nel.org>

The following UBSAN error is reported during boot on the db410c board on
a clang-19 build:

Internal error: UBSAN: array index out of bounds: 00000000f2005512 [#1] PREEMPT SMP
...
pc : qnoc_probe+0x5f8/0x5fc
...

The cause of the error is that the counter member was not set before
accessing the annotated flexible array member, but after that. Fix this
by initializing it earlier.

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
Closes: https://lore.kernel.org/r/CA+G9fYs+2mBz1y2dAzxkj9-oiBJ2Acm1Sf1h2YQ3VmBqj_VX2g@mail.gmail.com
Fixes: dd4904f3b924 ("interconnect: qcom: Annotate struct icc_onecell_data with __counted_by")
Signed-off-by: Georgi Djakov <djakov@...nel.org>
---
 drivers/interconnect/qcom/icc-rpm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c
index a8ed435f696c..ea1042d38128 100644
--- a/drivers/interconnect/qcom/icc-rpm.c
+++ b/drivers/interconnect/qcom/icc-rpm.c
@@ -503,6 +503,7 @@ int qnoc_probe(struct platform_device *pdev)
 			    GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;
+	data->num_nodes = num_nodes;
 
 	qp->num_intf_clks = cd_num;
 	for (i = 0; i < cd_num; i++)
@@ -597,7 +598,6 @@ int qnoc_probe(struct platform_device *pdev)
 
 		data->nodes[i] = node;
 	}
-	data->num_nodes = num_nodes;
 
 	clk_bulk_disable_unprepare(qp->num_intf_clks, qp->intf_clks);