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From: Stefan Wahren <stefan.wahren@i2se.com>
To: Nicolas Saenz Julienne <nsaenz@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: bcm-kernel-feedback-list@broadcom.com,
	Phil Elwell <phil@raspberrypi.com>,
	Gaston Gonzalez <gascoar@gmail.com>,
	linux-staging@lists.linux.dev,
	Stefan Wahren <stefan.wahren@i2se.com>
Subject: [PATCH 16/18] staging: vchiq_arm: Avoid NULL ptr deref in vchiq_dump_platform_instances
Date: Sun, 23 Jan 2022 21:02:21 +0100	[thread overview]
Message-ID: <1642968143-19281-17-git-send-email-stefan.wahren@i2se.com> (raw)
In-Reply-To: <1642968143-19281-1-git-send-email-stefan.wahren@i2se.com>

vchiq_get_state() can return a NULL pointer. So handle this cases and
avoid a NULL pointer derefence in vchiq_dump_platform_instances.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
 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 6ef8f19..a9b6e4a 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -1204,6 +1204,9 @@ 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.
-- 
2.7.4


  parent reply	other threads:[~2022-01-23 20:03 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-23 20:02 [PATCH 00/18] staging: vchiq_arm: minor adjustments Stefan Wahren
2022-01-23 20:02 ` [PATCH 01/18] staging: vchiq_core: fix indentation in vchiq_log_dump_mem Stefan Wahren
2022-01-23 20:02 ` [PATCH 02/18] staging: vchiq_debugfs: get the rid of n_log_entries Stefan Wahren
2022-01-23 20:02 ` [PATCH 03/18] staging: vchiq_arm: introduce is_adjacent_block Stefan Wahren
2022-01-23 20:02 ` [PATCH 04/18] staging: vchiq: convert TODOs into unordered list Stefan Wahren
2022-01-23 20:02 ` [PATCH 05/18] staging: vchiq: drop completed tasks from TODO Stefan Wahren
2022-01-23 20:02 ` [PATCH 06/18] staging: vchiq: add message handling to TODO list Stefan Wahren
2022-01-23 20:02 ` [PATCH 07/18] staging: vchiq_core: fix type of parameter localport Stefan Wahren
2022-01-23 20:02 ` [PATCH 08/18] staging: vchiq_core: simplify vchiq_add_service_internal Stefan Wahren
2022-01-24 15:26   ` Pavel Skripkin
2022-01-25  9:59     ` Dan Carpenter
2022-01-25 10:06       ` Pavel Skripkin
2022-01-25 10:20         ` Dan Carpenter
2022-01-25 10:22           ` Pavel Skripkin
2022-01-23 20:02 ` [PATCH 09/18] staging: vchiq_core: align return statements in msg_type_str Stefan Wahren
2022-01-23 20:02 ` [PATCH 10/18] staging: vchiq_core: drop prefix of vchiq_set_service_state Stefan Wahren
2022-01-23 20:02 ` [PATCH 11/18] staging: vchiq_core: reduce multi-line statements Stefan Wahren
2022-01-23 20:02 ` [PATCH 12/18] staging: vchiq_core: fix alignment Stefan Wahren
2022-01-23 20:02 ` [PATCH 13/18] staging: vchiq_core: avoid ternary operator for set_service_state Stefan Wahren
2022-01-23 20:02 ` [PATCH 14/18] staging: vchiq_core: use min_t macro Stefan Wahren
2022-01-23 20:02 ` [PATCH 15/18] staging: vchiq_arm: make vchiq_get_state return early Stefan Wahren
2022-01-23 20:02 ` Stefan Wahren [this message]
2022-01-23 20:02 ` [PATCH 17/18] staging: vchiq_core: handle NULL result of find_service_by_handle Stefan Wahren
2022-01-23 20:02 ` [PATCH 18/18] staging: vchiq_dev: Avoid unnecessary alloc in vchiq_ioc_create_service Stefan Wahren
2022-01-24  9:52 ` [PATCH 00/18] staging: vchiq_arm: minor adjustments nicolas saenz julienne

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