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Marliere" , Greg Kroah-Hartman , Paul Mundt , linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH] sh: intc: use after free in register_intc_controller() Message-ID: <45ff88d1-b687-43f4-a022-4e07930cd2d0@stanley.mountain> 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" In the error handling, for this function, we kfree(d) without ever removing it from the &intc_list which would lead to a use after free. To fix this, lets only add it to the list after everything has succeeded. Fixes: 2dcec7a988a1 ("sh: intc: set_irq_wake() support") Signed-off-by: Dan Carpenter Reviewed-by: John Paul Adrian Glaubitz --- This patch is highly speculative and I am not able to test it. Please, review with care. drivers/sh/intc/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/sh/intc/core.c b/drivers/sh/intc/core.c index 74350b5871dc..ea571eeb3078 100644 --- a/drivers/sh/intc/core.c +++ b/drivers/sh/intc/core.c @@ -209,7 +209,6 @@ int __init register_intc_controller(struct intc_desc *d= esc) goto err0; =20 INIT_LIST_HEAD(&d->list); - list_add_tail(&d->list, &intc_list); =20 raw_spin_lock_init(&d->lock); INIT_RADIX_TREE(&d->tree, GFP_ATOMIC); @@ -369,6 +368,7 @@ int __init register_intc_controller(struct intc_desc *d= esc) =20 d->skip_suspend =3D desc->skip_syscore_suspend; =20 + list_add_tail(&d->list, &intc_list); nr_intc_controllers++; =20 return 0; --=20 2.45.2