Patch "clk: ti: dra7-atl-clock: Fix possible ERR_PTR dereference" has been added to the 4.1-stable tree

Patch "clk: ti: dra7-atl-clock: Fix possible ERR_PTR dereference" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    clk: ti: dra7-atl-clock: Fix possible ERR_PTR dereference

to the 4.1-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:
     clk-ti-dra7-atl-clock-fix-possible-err_ptr-dereference.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From e0cdcda508f110b7ec190dc7c5eb2869ba73a535 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Date: Wed, 13 May 2015 15:54:40 +0900
Subject: clk: ti: dra7-atl-clock: Fix possible ERR_PTR dereference

From: Krzysztof Kozlowski <k.kozlowski@samsung.com>

commit e0cdcda508f110b7ec190dc7c5eb2869ba73a535 upstream.

of_clk_get_from_provider() returns ERR_PTR on failure. The
dra7-atl-clock driver was not checking its return value and
immediately used it in __clk_get_hw().  __clk_get_hw()
dereferences supplied clock, if it is not NULL, so in that case
it would dereference an ERR_PTR.

Fixes: 9ac33b0ce81f ("CLK: TI: Driver for DRA7 ATL (Audio Tracking Logic)")
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/clk/ti/clk-dra7-atl.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/clk/ti/clk-dra7-atl.c
+++ b/drivers/clk/ti/clk-dra7-atl.c
@@ -252,6 +252,11 @@ static int of_dra7_atl_clk_probe(struct
 		}
 
 		clk = of_clk_get_from_provider(&clkspec);
+		if (IS_ERR(clk)) {
+			pr_err("%s: failed to get atl clock %d from provider\n",
+			       __func__, i);
+			return PTR_ERR(clk);
+		}
 
 		cdesc = to_atl_desc(__clk_get_hw(clk));
 		cdesc->cinfo = cinfo;


Patches currently in stable-queue which might be from k.kozlowski@samsung.com are

queue-4.1/clk-ti-dra7-atl-clock-fix-possible-err_ptr-dereference.patch
queue-4.1/clocksource-exynos_mct-avoid-blocking-calls-in-the-cpu-hotplug-notifier.patch