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Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize t
From: |
Corey Minyard |
Subject: |
Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks |
Date: |
Sun, 16 Feb 2020 13:43:22 -0600 |
User-agent: |
Mutt/1.9.4 (2018-02-28) |
On Sat, Feb 15, 2020 at 04:47:05PM +0100, Philippe Mathieu-Daudé wrote:
> In commit f3a508eb4e the Euler Robot reported calling timer_new()
> in instance_init() can leak heap memory. The easier fix is to
> delay the timer creation at instance realize(). Similarly move
> timer_del() into a new instance unrealize() method.
>
> This case was found with the following coccinelle script:
>
> @ match @
> identifier instance_init;
> typedef Object;
> identifier obj;
> expression val, scale;
> identifier clock_type, callback, opaque;
> position pos;
> @@
> static void instance_init(Object *obj)
> {
> <...
> (
> val = timer_new@pos(clock_type, scale, callback, opaque);
> |
> val = timer_new_ns@pos(clock_type, callback, opaque);
> |
> val = timer_new_us@pos(clock_type, callback, opaque);
> |
> val = timer_new_ms@pos(clock_type, callback, opaque);
> )
> ...>
> }
>
> @ script:python @
> f << match.instance_init;
> p << match.pos;
> @@
> print "check %s:%s:%s in %s()" % (p[0].file, p[0].line, p[0].column, f)
>
> Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
This looks ok to me:
Acked-by: Corey Minyard <address@hidden>
I can take it into my tree, if you like.
-corey
> ---
> Cc: Pan Nengyuan <address@hidden>
> ---
> hw/ipmi/ipmi_bmc_extern.c | 12 ++++++++++--
> 1 file changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/hw/ipmi/ipmi_bmc_extern.c b/hw/ipmi/ipmi_bmc_extern.c
> index f9a13e0a44..9144ac6c38 100644
> --- a/hw/ipmi/ipmi_bmc_extern.c
> +++ b/hw/ipmi/ipmi_bmc_extern.c
> @@ -463,6 +463,15 @@ static void ipmi_bmc_extern_realize(DeviceState *dev,
> Error **errp)
>
> qemu_chr_fe_set_handlers(&ibe->chr, can_receive, receive,
> chr_event, NULL, ibe, NULL, true);
> +
> + ibe->extern_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, extern_timeout,
> ibe);
> +}
> +
> +static void ipmi_bmc_extern_unrealize(DeviceState *dev, Error **errp)
> +{
> + IPMIBmcExtern *ibe = IPMI_BMC_EXTERN(dev);
> +
> + timer_del(ibe->extern_timer);
> }
>
> static int ipmi_bmc_extern_post_migrate(void *opaque, int version_id)
> @@ -502,7 +511,6 @@ static void ipmi_bmc_extern_init(Object *obj)
> {
> IPMIBmcExtern *ibe = IPMI_BMC_EXTERN(obj);
>
> - ibe->extern_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, extern_timeout,
> ibe);
> vmstate_register(NULL, 0, &vmstate_ipmi_bmc_extern, ibe);
> }
>
> @@ -510,7 +518,6 @@ static void ipmi_bmc_extern_finalize(Object *obj)
> {
> IPMIBmcExtern *ibe = IPMI_BMC_EXTERN(obj);
>
> - timer_del(ibe->extern_timer);
> timer_free(ibe->extern_timer);
> }
>
> @@ -528,6 +535,7 @@ static void ipmi_bmc_extern_class_init(ObjectClass *oc,
> void *data)
> bk->handle_reset = ipmi_bmc_extern_handle_reset;
> dc->hotpluggable = false;
> dc->realize = ipmi_bmc_extern_realize;
> + dc->unrealize = ipmi_bmc_extern_unrealize;
> device_class_set_props(dc, ipmi_bmc_extern_properties);
> }
>
> --
> 2.21.1
>
- [PATCH 0/2] hw: Delay timer_new() from init to realize to avoid memleaks, Philippe Mathieu-Daudé, 2020/02/15
- [PATCH 2/2] hw/sd/sd: Delay timer_new_ns() from init to realize to avoid memleaks, Philippe Mathieu-Daudé, 2020/02/15
- [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks, Philippe Mathieu-Daudé, 2020/02/15
- Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks,
Corey Minyard <=
- Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks, Peter Maydell, 2020/02/17
- Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks, Philippe Mathieu-Daudé, 2020/02/17
- Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks, Peter Maydell, 2020/02/17
- Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks, Philippe Mathieu-Daudé, 2020/02/17
- Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks, Peter Maydell, 2020/02/17
- Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks, Philippe Mathieu-Daudé, 2020/02/17
- Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks, Peter Maydell, 2020/02/17
- Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks, Philippe Mathieu-Daudé, 2020/02/17
- Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks, Peter Maydell, 2020/02/17
- Re: [PATCH 1/2] hw/ipmi/bmc: Delay timer_new_ns() from init to realize to avoid memleaks, Markus Armbruster, 2020/02/18