linux-kernel - [PATCH V2 3/4] mailbox: zynqmp-ipi: Fix out-of-bounds access in mailbox cleanup loop

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

Message-ID: <20250929073723.139130-4-harini.t@amd.com>
Date: Mon, 29 Sep 2025 13:07:22 +0530
From: Harini T <harini.t@....com>
To: <jassisinghbrar@...il.com>, <michal.simek@....com>, <peng.fan@....com>
CC: <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<git@....com>, Harini T <harini.t@....com>
Subject: [PATCH V2 3/4] mailbox: zynqmp-ipi: Fix out-of-bounds access in mailbox cleanup loop

The cleanup loop was starting at the wrong array index, causing
out-of-bounds access.
Start the loop at the correct index for zero-indexed arrays to prevent
accessing memory beyond the allocated array bounds.

Fixes: 4981b82ba2ff ("mailbox: ZynqMP IPI mailbox controller")
Signed-off-by: Harini T <harini.t@....com>
---
 drivers/mailbox/zynqmp-ipi-mailbox.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mailbox/zynqmp-ipi-mailbox.c b/drivers/mailbox/zynqmp-ipi-mailbox.c
index bdcc6937ee30..dddbef6b2cb8 100644
--- a/drivers/mailbox/zynqmp-ipi-mailbox.c
+++ b/drivers/mailbox/zynqmp-ipi-mailbox.c
@@ -890,7 +890,7 @@ static void zynqmp_ipi_free_mboxes(struct zynqmp_ipi_pdata *pdata)
 	if (pdata->irq < MAX_SGI)
 		xlnx_mbox_cleanup_sgi(pdata);
 
-	i = pdata->num_mboxes;
+	i = pdata->num_mboxes - 1;
 	for (; i >= 0; i--) {
 		ipi_mbox = &pdata->ipi_mboxes[i];
 		if (device_is_registered(&ipi_mbox->dev))
-- 
2.43.0