From: Roman Demidov <roman.demidov.nn@gmail.com>
To: stable@vger.kernel.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Roman Demidov <roman.demidov.nn@gmail.com>,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
bcm-kernel-feedback-list@broadcom.com,
linux-rpi-kernel@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org,
lvc-project@linuxtesting.org,
Nicolas Saenz Julienne <nsaenz@kernel.org>,
Stefan Wahren <stefan.wahren@i2se.com>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.10] staging: vchiq_arm: Avoid NULL ptr deref in vchiq_dump_platform_instances
Date: Mon, 5 Oct 2026 16:01:41 +0300 [thread overview]
Message-ID: <20261005130143.138638-1-roman.demidov.nn@gmail.com> (raw)
From: Stefan Wahren <stefan.wahren@i2se.com>
commit aa899e686d442c63d50f4d369cc02dbbf0941cb0 upstream.
vchiq_get_state() can return a NULL pointer. So handle this cases and
avoid a NULL pointer derefence in vchiq_dump_platform_instances.
Reviewed-by: Nicolas Saenz Julienne <nsaenz@kernel.org>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Link: https://lore.kernel.org/r/1642968143-19281-17-git-send-email-stefan.wahren@i2se.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Roman Demidov <roman.demidov.nn@gmail.com>
---
Backport fix for CVE-2022-49106
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
index 178cf90fb3e5..adde80b56073 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -2063,6 +2063,9 @@ int vchiq_dump_platform_instances(void *dump_context)
int len;
int i;
+ if (!state)
+ return -ENOTCONN;
+
/* There is no list of instances, so instead scan all services,
marking those that have been dumped. */
--
2.53.0
reply other threads:[~2026-10-05 13:02 UTC|newest]
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