lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <d64d419980ce3ecd0efb72aa86604d28@kernel.org> Date: Fri, 15 Oct 2021 10:24:54 +0100 From: Marc Zyngier <maz@...nel.org> To: zhaoxiao <long870912@...il.com> Cc: chenhuacai@...nel.org, jiaxun.yang@...goat.com, tglx@...utronix.de, linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org, zhaoxiao <zhaoxiao@...ontech.com> Subject: Re: [PATCH] irqchip/loongson-htvec:- Handle return value of ioremap. On 2021-10-15 08:25, zhaoxiao wrote: > From: zhaoxiao <zhaoxiao@...ontech.com> > > Here, If ioremap will fail. It will return NULL.Kernel can run into > a NULL-pointer dereference. This error check will avoid NULL pointer > dereference. > > Signed-off-by: zhaoxiao <zhaoxiao@...ontech.com> > --- > drivers/irqchip/irq-loongson-htvec.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/irqchip/irq-loongson-htvec.c > b/drivers/irqchip/irq-loongson-htvec.c > index 1cc0bceb4472..a36c20f44ec4 100644 > --- a/drivers/irqchip/irq-loongson-htvec.c > +++ b/drivers/irqchip/irq-loongson-htvec.c > @@ -267,6 +267,8 @@ struct fwnode_handle *htvec_acpi_init(struct > fwnode_handle *parent, > > priv->num_parents = HTVEC_MAX_PARENT_IRQ; > priv->base = ioremap(acpi_htvec->address, acpi_htvec->size); > + if (!priv->base) > + goto free_priv; > > /* Interrupt may come from any of the 8 interrupt lines */ > for (i = 0; i < priv->num_parents; i++) > @@ -307,6 +309,7 @@ struct fwnode_handle *htvec_acpi_init(struct > fwnode_handle *parent, > iounmap_base: > iounmap(priv->base); > priv->domain_handle = NULL; > +free_priv: > kfree(priv); > > return NULL; What is the difference between this and the patch you sent 3 days ago? M. -- Jazz is not dead. It just smells funny...
Powered by blists - more mailing lists