2024-01-11 08:27:29

by Sergio Paracuellos

Subject: [PATCH] PCI: mt7621: Fix possible string truncation in snprintf

The following warning appears when driver is compiled with W=1.

CC drivers/pci/controller/pcie-mt7621.o
drivers/pci/controller/pcie-mt7621.c: In function ‘mt7621_pcie_probe’:
drivers/pci/controller/pcie-mt7621.c:228:49: error: ‘snprintf’ output may
be truncated before the last format character [-Werror=format-truncation=]
228 | snprintf(name, sizeof(name), "pcie-phy%d", slot);
| ^
drivers/pci/controller/pcie-mt7621.c:228:9: note: ‘snprintf’ output between
10 and 11 bytes into a destination of size 10
228 | snprintf(name, sizeof(name), "pcie-phy%d", slot);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Clean this up increasing destination buffer one byte.

Reported-by: Bjorn Helgaas <[email protected]>
Closes: https://lore.kernel.org/linux-pci/20240110212302.GA2123146@bhelgaas/T/#t
Signed-off-by: Sergio Paracuellos <[email protected]>
---
drivers/pci/controller/pcie-mt7621.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-mt7621.c b/drivers/pci/controller/pcie-mt7621.c
index 79e225edb42a..d97b956e6e57 100644
--- a/drivers/pci/controller/pcie-mt7621.c
+++ b/drivers/pci/controller/pcie-mt7621.c
@@ -202,7 +202,7 @@ static int mt7621_pcie_parse_port(struct mt7621_pcie *pcie,
struct mt7621_pcie_port *port;
struct device *dev = pcie->dev;
struct platform_device *pdev = to_platform_device(dev);
- char name[10];
+ char name[11];
int err;

port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
--
2.25.1

2024-02-23 11:27:51

by Sergio Paracuellos

Subject: Re: [PATCH] PCI: mt7621: Fix possible string truncation in snprintf

Hi,

On Thu, Jan 11, 2024 at 9:27 AM Sergio Paracuellos
<[email protected]> wrote:
>
> The following warning appears when driver is compiled with W=1.
>
> CC drivers/pci/controller/pcie-mt7621.o
> drivers/pci/controller/pcie-mt7621.c: In function ‘mt7621_pcie_probe’:
> drivers/pci/controller/pcie-mt7621.c:228:49: error: ‘snprintf’ output may
> be truncated before the last format character [-Werror=format-truncation=]
> 228 | snprintf(name, sizeof(name), "pcie-phy%d", slot);
> | ^
> drivers/pci/controller/pcie-mt7621.c:228:9: note: ‘snprintf’ output between
> 10 and 11 bytes into a destination of size 10
> 228 | snprintf(name, sizeof(name), "pcie-phy%d", slot);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Clean this up increasing destination buffer one byte.
>
> Reported-by: Bjorn Helgaas <[email protected]>
> Closes: https://lore.kernel.org/linux-pci/20240110212302.GA2123146@bhelgaas/T/#t
> Signed-off-by: Sergio Paracuellos <[email protected]>
> ---
> drivers/pci/controller/pcie-mt7621.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/pcie-mt7621.c b/drivers/pci/controller/pcie-mt7621.c
> index 79e225edb42a..d97b956e6e57 100644
> --- a/drivers/pci/controller/pcie-mt7621.c
> +++ b/drivers/pci/controller/pcie-mt7621.c
> @@ -202,7 +202,7 @@ static int mt7621_pcie_parse_port(struct mt7621_pcie *pcie,
> struct mt7621_pcie_port *port;
> struct device *dev = pcie->dev;
> struct platform_device *pdev = to_platform_device(dev);
> - char name[10];
> + char name[11];
> int err;
>
> port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
> --
> 2.25.1
>

Gentle ping on this patch :)

Thanks,
Sergio Paracuellos

2024-04-11 09:32:52

by Sergio Paracuellos

Subject: Re: [PATCH] PCI: mt7621: Fix possible string truncation in snprintf

Hi,

On Fri, Feb 23, 2024 at 12:24 PM Sergio Paracuellos
<[email protected]> wrote:
>
> Hi,
>
> On Thu, Jan 11, 2024 at 9:27 AM Sergio Paracuellos
> <[email protected]> wrote:
> >
> > The following warning appears when driver is compiled with W=1.
> >
> > CC drivers/pci/controller/pcie-mt7621.o
> > drivers/pci/controller/pcie-mt7621.c: In function ‘mt7621_pcie_probe’:
> > drivers/pci/controller/pcie-mt7621.c:228:49: error: ‘snprintf’ output may
> > be truncated before the last format character [-Werror=format-truncation=]
> > 228 | snprintf(name, sizeof(name), "pcie-phy%d", slot);
> > | ^
> > drivers/pci/controller/pcie-mt7621.c:228:9: note: ‘snprintf’ output between
> > 10 and 11 bytes into a destination of size 10
> > 228 | snprintf(name, sizeof(name), "pcie-phy%d", slot);
> > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >
> > Clean this up increasing destination buffer one byte.
> >
> > Reported-by: Bjorn Helgaas <[email protected]>
> > Closes: https://lore.kernel.org/linux-pci/20240110212302.GA2123146@bhelgaas/T/#t
> > Signed-off-by: Sergio Paracuellos <[email protected]>
> > ---
> > drivers/pci/controller/pcie-mt7621.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/pci/controller/pcie-mt7621.c b/drivers/pci/controller/pcie-mt7621.c
> > index 79e225edb42a..d97b956e6e57 100644
> > --- a/drivers/pci/controller/pcie-mt7621.c
> > +++ b/drivers/pci/controller/pcie-mt7621.c
> > @@ -202,7 +202,7 @@ static int mt7621_pcie_parse_port(struct mt7621_pcie *pcie,
> > struct mt7621_pcie_port *port;
> > struct device *dev = pcie->dev;
> > struct platform_device *pdev = to_platform_device(dev);
> > - char name[10];
> > + char name[11];
> > int err;
> >
> > port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
> > --
> > 2.25.1
> >
>
> Gentle ping on this patch :)

Another gentle ping on this patch :)

Thanks,
Sergio Paracuellos

2024-04-12 21:33:37

by Bjorn Helgaas

Subject: Re: [PATCH] PCI: mt7621: Fix possible string truncation in snprintf

On Thu, Jan 11, 2024 at 09:27:04AM +0100, Sergio Paracuellos wrote:
> The following warning appears when driver is compiled with W=1.
>
> CC drivers/pci/controller/pcie-mt7621.o
> drivers/pci/controller/pcie-mt7621.c: In function ‘mt7621_pcie_probe’:
> drivers/pci/controller/pcie-mt7621.c:228:49: error: ‘snprintf’ output may
> be truncated before the last format character [-Werror=format-truncation=]
> 228 | snprintf(name, sizeof(name), "pcie-phy%d", slot);
> | ^
> drivers/pci/controller/pcie-mt7621.c:228:9: note: ‘snprintf’ output between
> 10 and 11 bytes into a destination of size 10
> 228 | snprintf(name, sizeof(name), "pcie-phy%d", slot);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Clean this up increasing destination buffer one byte.
>
> Reported-by: Bjorn Helgaas <[email protected]>
> Closes: https://lore.kernel.org/linux-pci/20240110212302.GA2123146@bhelgaas/T/#t
> Signed-off-by: Sergio Paracuellos <[email protected]>

Krzysztof applied this to pci/controller/mt7621 for v6.10, thanks! I
just pulled that branch into "next", so it should appear in the next
linux-next.

> ---
> drivers/pci/controller/pcie-mt7621.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pci/controller/pcie-mt7621.c b/drivers/pci/controller/pcie-mt7621.c
> index 79e225edb42a..d97b956e6e57 100644
> --- a/drivers/pci/controller/pcie-mt7621.c
> +++ b/drivers/pci/controller/pcie-mt7621.c
> @@ -202,7 +202,7 @@ static int mt7621_pcie_parse_port(struct mt7621_pcie *pcie,
> struct mt7621_pcie_port *port;
> struct device *dev = pcie->dev;
> struct platform_device *pdev = to_platform_device(dev);
> - char name[10];
> + char name[11];
> int err;
>
> port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
> --
> 2.25.1
>

2024-04-13 10:11:10

by Sergio Paracuellos

Subject: Re: [PATCH] PCI: mt7621: Fix possible string truncation in snprintf

On Fri, Apr 12, 2024 at 11:33 PM Bjorn Helgaas <[email protected]> wrote:
>
> On Thu, Jan 11, 2024 at 09:27:04AM +0100, Sergio Paracuellos wrote:
> > The following warning appears when driver is compiled with W=1.
> >
> > CC drivers/pci/controller/pcie-mt7621.o
> > drivers/pci/controller/pcie-mt7621.c: In function ‘mt7621_pcie_probe’:
> > drivers/pci/controller/pcie-mt7621.c:228:49: error: ‘snprintf’ output may
> > be truncated before the last format character [-Werror=format-truncation=]
> > 228 | snprintf(name, sizeof(name), "pcie-phy%d", slot);
> > | ^
> > drivers/pci/controller/pcie-mt7621.c:228:9: note: ‘snprintf’ output between
> > 10 and 11 bytes into a destination of size 10
> > 228 | snprintf(name, sizeof(name), "pcie-phy%d", slot);
> > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >
> > Clean this up increasing destination buffer one byte.
> >
> > Reported-by: Bjorn Helgaas <[email protected]>
> > Closes: https://lore.kernel.org/linux-pci/20240110212302.GA2123146@bhelgaas/T/#t
> > Signed-off-by: Sergio Paracuellos <[email protected]>
>
> Krzysztof applied this to pci/controller/mt7621 for v6.10, thanks! I
> just pulled that branch into "next", so it should appear in the next
> linux-next.

Awesome. Thanks for letting me know.

Best regards,
Sergio Paracuellos