* [PATCH] ide: pci: Fix memleak in ide_pci_init_two
@ 2020-12-20 7:05 Dinghao Liu
2020-12-20 19:50 ` Kari Argillander
0 siblings, 1 reply; 4+ messages in thread
From: Dinghao Liu @ 2020-12-20 7:05 UTC (permalink / raw)
To: dinghao.liu, kjlu; +Cc: David S. Miller, linux-ide, linux-kernel
When do_ide_setup_pci_device() fails, host allocated
by ide_host_alloc() may not have been freed, which
leads to memleak.
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
drivers/ide/setup-pci.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
index fdc8e813170c..c7da5368fcd4 100644
--- a/drivers/ide/setup-pci.c
+++ b/drivers/ide/setup-pci.c
@@ -586,7 +586,7 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2,
* do_ide_setup_pci_device() on the first device!
*/
if (ret < 0)
- goto out_free_bars;
+ goto out_free_host;
/* fixup IRQ */
if (ide_pci_is_in_compatibility_mode(pdev[i])) {
@@ -597,11 +597,11 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2,
}
ret = ide_host_register(host, d, hws);
- if (ret)
- ide_host_free(host);
- else
+ if (!ret)
goto out;
+out_free_host:
+ ide_host_free(host);
out_free_bars:
i = n_ports / 2;
while (i--)
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] ide: pci: Fix memleak in ide_pci_init_two
2020-12-20 7:05 [PATCH] ide: pci: Fix memleak in ide_pci_init_two Dinghao Liu
@ 2020-12-20 19:50 ` Kari Argillander
2020-12-23 8:59 ` dinghao.liu
0 siblings, 1 reply; 4+ messages in thread
From: Kari Argillander @ 2020-12-20 19:50 UTC (permalink / raw)
To: Dinghao Liu; +Cc: kjlu, David S. Miller, linux-ide, linux-kernel
On Sun, Dec 20, 2020 at 03:05:40PM +0800, Dinghao Liu wrote:
> When do_ide_setup_pci_device() fails, host allocated
> by ide_host_alloc() may not have been freed, which
> leads to memleak.
>
> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> ---
> drivers/ide/setup-pci.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
> index fdc8e813170c..c7da5368fcd4 100644
> --- a/drivers/ide/setup-pci.c
> +++ b/drivers/ide/setup-pci.c
> @@ -586,7 +586,7 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2,
> * do_ide_setup_pci_device() on the first device!
> */
> if (ret < 0)
> - goto out_free_bars;
> + goto out_free_host;
>
> /* fixup IRQ */
> if (ide_pci_is_in_compatibility_mode(pdev[i])) {
> @@ -597,11 +597,11 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2,
> }
>
> ret = ide_host_register(host, d, hws);
> - if (ret)
> - ide_host_free(host);
> - else
> + if (!ret)
> goto out;
Maybe
if (ret)
goto out_free_host;
return 0;
would be more clear here. But this is just small nit.
>
> +out_free_host:
> + ide_host_free(host);
> out_free_bars:
> i = n_ports / 2;
> while (i--)
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Re: [PATCH] ide: pci: Fix memleak in ide_pci_init_two
2020-12-20 19:50 ` Kari Argillander
@ 2020-12-23 8:59 ` dinghao.liu
0 siblings, 0 replies; 4+ messages in thread
From: dinghao.liu @ 2020-12-23 8:59 UTC (permalink / raw)
To: Kari Argillander; +Cc: kjlu, David S. Miller, linux-ide, linux-kernel
> On Sun, Dec 20, 2020 at 03:05:40PM +0800, Dinghao Liu wrote:
> > When do_ide_setup_pci_device() fails, host allocated
> > by ide_host_alloc() may not have been freed, which
> > leads to memleak.
> >
> > Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
> > ---
> > drivers/ide/setup-pci.c | 8 ++++----
> > 1 file changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
> > index fdc8e813170c..c7da5368fcd4 100644
> > --- a/drivers/ide/setup-pci.c
> > +++ b/drivers/ide/setup-pci.c
> > @@ -586,7 +586,7 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2,
> > * do_ide_setup_pci_device() on the first device!
> > */
> > if (ret < 0)
> > - goto out_free_bars;
> > + goto out_free_host;
> >
> > /* fixup IRQ */
> > if (ide_pci_is_in_compatibility_mode(pdev[i])) {
> > @@ -597,11 +597,11 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2,
> > }
> >
> > ret = ide_host_register(host, d, hws);
> > - if (ret)
> > - ide_host_free(host);
> > - else
> > + if (!ret)
> > goto out;
>
> Maybe
> if (ret)
> goto out_free_host;
>
> return 0;
>
> would be more clear here. But this is just small nit.
>
> >
> > +out_free_host:
> > + ide_host_free(host);
> > out_free_bars:
> > i = n_ports / 2;
> > while (i--)
Thank you for your advice and I will send a new patch soon.
Regards,
Dinghao
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] ide: pci: Fix memleak in ide_pci_init_two
@ 2020-08-26 9:17 Dinghao Liu
0 siblings, 0 replies; 4+ messages in thread
From: Dinghao Liu @ 2020-08-26 9:17 UTC (permalink / raw)
To: dinghao.liu, kjlu; +Cc: David S. Miller, linux-ide, linux-kernel
When do_ide_setup_pci_device() fails, host should be
freed just like when ide_host_register() fails.
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
drivers/ide/setup-pci.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
index fdc8e813170c..e6cba7e24c39 100644
--- a/drivers/ide/setup-pci.c
+++ b/drivers/ide/setup-pci.c
@@ -585,8 +585,10 @@ int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2,
* FIXME: Mom, mom, they stole me the helper function to undo
* do_ide_setup_pci_device() on the first device!
*/
- if (ret < 0)
+ if (ret < 0) {
+ ide_host_free(host);
goto out_free_bars;
+ }
/* fixup IRQ */
if (ide_pci_is_in_compatibility_mode(pdev[i])) {
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-12-23 9:00 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2020-12-20 7:05 [PATCH] ide: pci: Fix memleak in ide_pci_init_two Dinghao Liu
2020-12-20 19:50 ` Kari Argillander
2020-12-23 8:59 ` dinghao.liu
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2020-08-26 9:17 Dinghao Liu
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