linux-kernel - [PATCH AUTOSEL 4.19 008/172] remoteproc: Fix IDR initialisation in rproc

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: <20200618012218.607130-8-sashal@kernel.org>
Date:   Wed, 17 Jun 2020 21:19:34 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Alex Elder <elder@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suman Anna <s-anna@...com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Sasha Levin <sashal@...nel.org>,
        linux-remoteproc@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 008/172] remoteproc: Fix IDR initialisation in rproc_alloc()

From: Alex Elder <elder@...aro.org>

[ Upstream commit 6442df49400b466431979e7634849a464a5f1861 ]

If ida_simple_get() returns an error when called in rproc_alloc(),
put_device() is called to clean things up.  By this time the rproc
device type has been assigned, with rproc_type_release() as the
release function.

The first thing rproc_type_release() does is call:
    idr_destroy(&rproc->notifyids);

But at the time the ida_simple_get() call is made, the notifyids
field in the remoteproc structure has not been initialized.

I'm not actually sure this case causes an observable problem, but
it's incorrect.  Fix this by initializing the notifyids field before
calling ida_simple_get() in rproc_alloc().

Fixes: b5ab5e24e960 ("remoteproc: maintain a generic child device for each rproc")
Signed-off-by: Alex Elder <elder@...aro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>
Reviewed-by: Suman Anna <s-anna@...com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Link: https://lore.kernel.org/r/20200415204858.2448-2-mathieu.poirier@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/remoteproc/remoteproc_core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index d5ff272fde34..e48069db1703 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1598,6 +1598,7 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
 	rproc->dev.type = &rproc_type;
 	rproc->dev.class = &rproc_class;
 	rproc->dev.driver_data = rproc;
+	idr_init(&rproc->notifyids);
 
 	/* Assign a unique device index and name */
 	rproc->index = ida_simple_get(&rproc_dev_index, 0, 0, GFP_KERNEL);
@@ -1622,8 +1623,6 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
 
 	mutex_init(&rproc->lock);
 
-	idr_init(&rproc->notifyids);
-
 	INIT_LIST_HEAD(&rproc->carveouts);
 	INIT_LIST_HEAD(&rproc->mappings);
 	INIT_LIST_HEAD(&rproc->traces);
-- 
2.25.1