* [PATCH] mips: sgi-ip22: add a check for the return of kzalloc()
@ 2022-03-25 10:57 xkernel.wang
2022-03-30 18:34 ` Thomas Bogendoerfer
0 siblings, 1 reply; 2+ messages in thread
From: xkernel.wang @ 2022-03-25 10:57 UTC (permalink / raw)
To: tsbogend; +Cc: linux-mips, linux-kernel, Xiaoke Wang
From: Xiaoke Wang <xkernel.wang@foxmail.com>
kzalloc() is a memory allocation function which can return NULL when
some internal memory errors happen. So it is better to check it to
prevent potential wrong memory access.
Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
---
arch/mips/sgi-ip22/ip22-gio.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/mips/sgi-ip22/ip22-gio.c b/arch/mips/sgi-ip22/ip22-gio.c
index dfc52f6..38d12f4 100644
--- a/arch/mips/sgi-ip22/ip22-gio.c
+++ b/arch/mips/sgi-ip22/ip22-gio.c
@@ -363,6 +363,8 @@ static void ip22_check_gio(int slotno, unsigned long addr, int irq)
printk(KERN_INFO "GIO: slot %d : %s (id %x)\n",
slotno, name, id);
gio_dev = kzalloc(sizeof *gio_dev, GFP_KERNEL);
+ if (!gio_dev)
+ return;
gio_dev->name = name;
gio_dev->slotno = slotno;
gio_dev->id.id = id;
--
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] mips: sgi-ip22: add a check for the return of kzalloc()
2022-03-25 10:57 [PATCH] mips: sgi-ip22: add a check for the return of kzalloc() xkernel.wang
@ 2022-03-30 18:34 ` Thomas Bogendoerfer
0 siblings, 0 replies; 2+ messages in thread
From: Thomas Bogendoerfer @ 2022-03-30 18:34 UTC (permalink / raw)
To: xkernel.wang; +Cc: linux-mips, linux-kernel
On Fri, Mar 25, 2022 at 06:57:18PM +0800, xkernel.wang@foxmail.com wrote:
> From: Xiaoke Wang <xkernel.wang@foxmail.com>
>
> kzalloc() is a memory allocation function which can return NULL when
> some internal memory errors happen. So it is better to check it to
> prevent potential wrong memory access.
>
> Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
> ---
> arch/mips/sgi-ip22/ip22-gio.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/mips/sgi-ip22/ip22-gio.c b/arch/mips/sgi-ip22/ip22-gio.c
> index dfc52f6..38d12f4 100644
> --- a/arch/mips/sgi-ip22/ip22-gio.c
> +++ b/arch/mips/sgi-ip22/ip22-gio.c
> @@ -363,6 +363,8 @@ static void ip22_check_gio(int slotno, unsigned long addr, int irq)
> printk(KERN_INFO "GIO: slot %d : %s (id %x)\n",
> slotno, name, id);
> gio_dev = kzalloc(sizeof *gio_dev, GFP_KERNEL);
> + if (!gio_dev)
> + return;
> gio_dev->name = name;
> gio_dev->slotno = slotno;
> gio_dev->id.id = id;
> --
applied to mips-next.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-03-25 10:57 [PATCH] mips: sgi-ip22: add a check for the return of kzalloc() xkernel.wang
2022-03-30 18:34 ` Thomas Bogendoerfer
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