linux-kernel - [PATCH 5.15.y] genirq/irq_sim: Initialize work context pointers properly

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Message-Id: <20260203020714.799655-1-black.hawk@163.com>
Date: Tue,  3 Feb 2026 10:07:14 +0800
From: Rahul Sharma <black.hawk@....com>
To: gregkh@...uxfoundation.org,
	stable@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Gyeyoung Baek <gye976@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Rahul Sharma <black.hawk@....com>
Subject: [PATCH 5.15.y] genirq/irq_sim: Initialize work context pointers properly

From: Gyeyoung Baek <gye976@...il.com>

[ Upstream commit 8a2277a3c9e4cc5398f80821afe7ecbe9bdf2819 ]

Initialize `ops` member's pointers properly by using kzalloc() instead of
kmalloc() when allocating the simulation work context. Otherwise the
pointers contain random content leading to invalid dereferencing.

Signed-off-by: Gyeyoung Baek <gye976@...il.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lore.kernel.org/all/20250612124827.63259-1-gye976@gmail.com
[ The context change is due to the commit 011f583781fa
("genirq/irq_sim: add an extended irq_sim initializer")
which is irrelevant to the logic of this patch. ]
Signed-off-by: Rahul Sharma <black.hawk@....com>
---
 kernel/irq/irq_sim.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/irq/irq_sim.c b/kernel/irq/irq_sim.c
index 0cd02efa3a74..12a1b951341f 100644
--- a/kernel/irq/irq_sim.c
+++ b/kernel/irq/irq_sim.c
@@ -166,7 +166,7 @@ struct irq_domain *irq_domain_create_sim(struct fwnode_handle *fwnode,
 {
 	struct irq_sim_work_ctx *work_ctx;
 
-	work_ctx = kmalloc(sizeof(*work_ctx), GFP_KERNEL);
+	work_ctx = kzalloc(sizeof(*work_ctx), GFP_KERNEL);
 	if (!work_ctx)
 		goto err_out;
 
-- 
2.34.1