FAILED: patch "[PATCH] of: resolver: Fix device node refcount leakage in" failed to apply to 6.6-stable tree

FAILED: patch "[PATCH] of: resolver: Fix device node refcount leakage in" failed to apply to 6.6-stable tree

[gregkh]

The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x a46a0805635d07de50c2ac71588345323c13b2f9
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2025041758-unloving-barcode-722b@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From a46a0805635d07de50c2ac71588345323c13b2f9 Mon Sep 17 00:00:00 2001
From: Zijun Hu <quic_zijuhu@quicinc.com>
Date: Mon, 24 Feb 2025 17:01:55 -0600
Subject: [PATCH] of: resolver: Fix device node refcount leakage in
 of_resolve_phandles()

In of_resolve_phandles(), refcount of device node @local_fixups will be
increased if the for_each_child_of_node() exits early, but nowhere to
decrease the refcount, so cause refcount leakage for the node.

Fix by using __free() on @local_fixups.

Fixes: da56d04c806a ("of/resolver: Switch to new local fixups format.")
Cc: stable@vger.kernel.org
Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Link: https://lore.kernel.org/r/20250209-of_irq_fix-v2-9-93e3a2659aa7@quicinc.com
[robh: Use __free() instead]
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

diff --git a/drivers/of/resolver.c b/drivers/of/resolver.c
index c871e35d4921..2caad365a665 100644
--- a/drivers/of/resolver.c
+++ b/drivers/of/resolver.c
@@ -249,8 +249,9 @@ static int adjust_local_phandle_references(const struct device_node *local_fixup
  */
 int of_resolve_phandles(struct device_node *overlay)
 {
-	struct device_node *child, *local_fixups, *refnode;
+	struct device_node *child, *refnode;
 	struct device_node *overlay_fixups;
+	struct device_node __free(device_node) *local_fixups = NULL;
 	struct property *prop;
 	const char *refpath;
 	phandle phandle, phandle_delta;