This is a note to let you know that I've just added the patch titled
iio: multiplexer: add NULL check on devm_kzalloc() and devm_kmemdup() return values
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iio-multiplexer-add-null-check-on-devm_kzalloc-and-devm_kmemdup-return-values.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed Dec 6 18:04:41 CET 2017
From: "Gustavo A. R. Silva" <garsilva@xxxxxxxxxxxxxx>
Date: Thu, 6 Jul 2017 23:53:11 -0500
Subject: iio: multiplexer: add NULL check on devm_kzalloc() and devm_kmemdup() return values
From: "Gustavo A. R. Silva" <garsilva@xxxxxxxxxxxxxx>
[ Upstream commit dd92d5ea20ef8a42be7aeda08c669c586c730451 ]
Check return values from call to devm_kzalloc() and devm_kmemup()
in order to prevent a NULL pointer dereference.
This issue was detected using Coccinelle and the following semantic patch:
@@
expression x;
identifier fld;
@@
* x = devm_kzalloc(...);
... when != x == NULL
x->fld
Fixes: 7ba9df54b091 ("iio: multiplexer: new iio category and iio-mux driver")
Signed-off-by: Gustavo A. R. Silva <garsilva@xxxxxxxxxxxxxx>
Acked-by: Peter Rosin <peda@xxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iio/multiplexer/iio-mux.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/iio/multiplexer/iio-mux.c
+++ b/drivers/iio/multiplexer/iio-mux.c
@@ -285,6 +285,9 @@ static int mux_configure_channel(struct
child->ext_info_cache = devm_kzalloc(dev,
sizeof(*child->ext_info_cache) *
num_ext_info, GFP_KERNEL);
+ if (!child->ext_info_cache)
+ return -ENOMEM;
+
for (i = 0; i < num_ext_info; ++i) {
child->ext_info_cache[i].size = -1;
@@ -309,6 +312,9 @@ static int mux_configure_channel(struct
child->ext_info_cache[i].data = devm_kmemdup(dev, page, ret + 1,
GFP_KERNEL);
+ if (!child->ext_info_cache[i].data)
+ return -ENOMEM;
+
child->ext_info_cache[i].data[ret] = 0;
child->ext_info_cache[i].size = ret;
}
Patches currently in stable-queue which might be from garsilva@xxxxxxxxxxxxxx are
queue-4.14/iio-multiplexer-add-null-check-on-devm_kzalloc-and-devm_kmemdup-return-values.patch
queue-4.14/edac-sb_edac-fix-missing-break-in-switch.patch