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Fri, 22 Aug 2025 01:08:49 -0700 (PDT) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-45b50de8a94sm28905885e9.12.2025.08.22.01.08.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Aug 2025 01:08:49 -0700 (PDT) Date: Fri, 22 Aug 2025 11:08:46 +0300 From: Dan Carpenter To: Lizhi Hou Cc: Rob Herring , Saravana Kannan , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH next] of: dynamic: Fix use after free in of_changeset_add_prop_helper() Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" If the of_changeset_add_property() function call fails, then this code frees "new_pp" and then dereference it on the next line. Return the error code directly instead. Fixes: c81f6ce16785 ("of: dynamic: Fix memleak when of_pci_add_properties()= failed") Signed-off-by: Dan Carpenter --- drivers/of/dynamic.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index dd30b7d8b5e4..2eaaddcb0ec4 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -935,13 +935,15 @@ static int of_changeset_add_prop_helper(struct of_cha= ngeset *ocs, return -ENOMEM; =20 ret =3D of_changeset_add_property(ocs, np, new_pp); - if (ret) + if (ret) { __of_prop_free(new_pp); + return ret; + } =20 new_pp->next =3D np->deadprops; np->deadprops =3D new_pp; =20 - return ret; + return 0; } =20 /** --=20 2.47.2