* [PATCH 1/2][next] net: usb: asix: Fix less than zero comparison of a u16 @ 2021-06-08 15:22 Colin King 2021-06-08 15:22 ` [PATCH 2/2][next] net: usb: asix: ax88772: net: " Colin King ` (2 more replies) 0 siblings, 3 replies; 7+ messages in thread From: Colin King @ 2021-06-08 15:22 UTC (permalink / raw) To: David S . Miller, Jakub Kicinski, Oleksij Rempel, linux-usb, netdev Cc: kernel-janitors, linux-kernel From: Colin Ian King <colin.king@canonical.com> The comparison of the u16 priv->phy_addr < 0 is always false because phy_addr is unsigned. Fix this by assigning the return from the call to function asix_read_phy_addr to int ret and using this for the less than zero error check comparison. Addresses-Coverity: ("Unsigned compared against 0") Fixes: e532a096be0e ("net: usb: asix: ax88772: add phylib support") Signed-off-by: Colin Ian King <colin.king@canonical.com> --- drivers/net/usb/asix_devices.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c index 57dafb3262d9..211c5a87eb15 100644 --- a/drivers/net/usb/asix_devices.c +++ b/drivers/net/usb/asix_devices.c @@ -704,9 +704,10 @@ static int ax88772_init_phy(struct usbnet *dev) struct asix_common_private *priv = dev->driver_priv; int ret; - priv->phy_addr = asix_read_phy_addr(dev, true); - if (priv->phy_addr < 0) + ret = asix_read_phy_addr(dev, true); + if (ret < 0) return priv->phy_addr; + priv->phy_addr = ret; snprintf(priv->phy_name, sizeof(priv->phy_name), PHY_ID_FMT, priv->mdio->id, priv->phy_addr); -- 2.31.1 ^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH 2/2][next] net: usb: asix: ax88772: net: Fix less than zero comparison of a u16 2021-06-08 15:22 [PATCH 1/2][next] net: usb: asix: Fix less than zero comparison of a u16 Colin King @ 2021-06-08 15:22 ` Colin King 2021-06-08 18:11 ` Oleksij Rempel 2021-06-08 17:58 ` [PATCH 1/2][next] net: usb: asix: " Oleksij Rempel 2021-06-09 9:27 ` Dan Carpenter 2 siblings, 1 reply; 7+ messages in thread From: Colin King @ 2021-06-08 15:22 UTC (permalink / raw) To: David S . Miller, Jakub Kicinski, Oleksij Rempel, linux-usb, netdev Cc: kernel-janitors, linux-kernel From: Colin Ian King <colin.king@canonical.com> The comparison of the u16 priv->phy_addr < 0 is always false because phy_addr is unsigned. Fix this by assigning the return from the call to function asix_read_phy_addr to int ret and using this for the less than zero error check comparison. Addresses-Coverity: ("Unsigned compared against 0") Fixes: 7e88b11a862a ("net: usb: asix: refactor asix_read_phy_addr() and handle errors on return") Signed-off-by: Colin Ian King <colin.king@canonical.com> --- drivers/net/usb/ax88172a.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/usb/ax88172a.c b/drivers/net/usb/ax88172a.c index 2e2081346740..e24773bb9398 100644 --- a/drivers/net/usb/ax88172a.c +++ b/drivers/net/usb/ax88172a.c @@ -205,7 +205,8 @@ static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf) goto free; } - priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy); + ret = asix_read_phy_addr(dev, priv->use_embdphy); + priv->phy_addr = ret; if (priv->phy_addr < 0) { ret = priv->phy_addr; goto free; -- 2.31.1 ^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH 2/2][next] net: usb: asix: ax88772: net: Fix less than zero comparison of a u16 2021-06-08 15:22 ` [PATCH 2/2][next] net: usb: asix: ax88772: net: " Colin King @ 2021-06-08 18:11 ` Oleksij Rempel 2021-06-09 9:51 ` Colin Ian King 0 siblings, 1 reply; 7+ messages in thread From: Oleksij Rempel @ 2021-06-08 18:11 UTC (permalink / raw) To: Colin King Cc: David S . Miller, Jakub Kicinski, Oleksij Rempel, linux-usb, netdev, kernel-janitors, linux-kernel On Tue, Jun 08, 2021 at 04:22:49PM +0100, Colin King wrote: > From: Colin Ian King <colin.king@canonical.com> > > The comparison of the u16 priv->phy_addr < 0 is always false because > phy_addr is unsigned. Fix this by assigning the return from the call > to function asix_read_phy_addr to int ret and using this for the > less than zero error check comparison. > > Addresses-Coverity: ("Unsigned compared against 0") > Fixes: 7e88b11a862a ("net: usb: asix: refactor asix_read_phy_addr() and handle errors on return") Here is wrong Fixes tag. This assignment was bogus before this patch. > Signed-off-by: Colin Ian King <colin.king@canonical.com> > --- > drivers/net/usb/ax88172a.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/usb/ax88172a.c b/drivers/net/usb/ax88172a.c > index 2e2081346740..e24773bb9398 100644 > --- a/drivers/net/usb/ax88172a.c > +++ b/drivers/net/usb/ax88172a.c > @@ -205,7 +205,8 @@ static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf) > goto free; > } > > - priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy); > + ret = asix_read_phy_addr(dev, priv->use_embdphy); > + priv->phy_addr = ret; Ah.. it is same bug in different color :) You probably wonted to do: if (ret < 0) goto free; priv->phy_addr = ret; > if (priv->phy_addr < 0) { > ret = priv->phy_addr; > goto free; > -- > 2.31.1 > > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 2/2][next] net: usb: asix: ax88772: net: Fix less than zero comparison of a u16 2021-06-08 18:11 ` Oleksij Rempel @ 2021-06-09 9:51 ` Colin Ian King 2021-06-09 11:52 ` Oleksij Rempel 0 siblings, 1 reply; 7+ messages in thread From: Colin Ian King @ 2021-06-09 9:51 UTC (permalink / raw) To: Oleksij Rempel Cc: David S . Miller, Jakub Kicinski, Oleksij Rempel, linux-usb, netdev, kernel-janitors, linux-kernel On 08/06/2021 19:11, Oleksij Rempel wrote: > On Tue, Jun 08, 2021 at 04:22:49PM +0100, Colin King wrote: >> From: Colin Ian King <colin.king@canonical.com> >> >> The comparison of the u16 priv->phy_addr < 0 is always false because >> phy_addr is unsigned. Fix this by assigning the return from the call >> to function asix_read_phy_addr to int ret and using this for the >> less than zero error check comparison. >> >> Addresses-Coverity: ("Unsigned compared against 0") >> Fixes: 7e88b11a862a ("net: usb: asix: refactor asix_read_phy_addr() and handle errors on return") > > Here is wrong Fixes tag. This assignment was bogus before this patch. I'm not sure that's correct, that commit has the following change in it: diff --git a/drivers/net/usb/ax88172a.c b/drivers/net/usb/ax88172a.c index b404c9462dce..c8ca5187eece 100644 --- a/drivers/net/usb/ax88172a.c +++ b/drivers/net/usb/ax88172a.c @@ -220,6 +220,11 @@ static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf) } priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy); + if (priv->phy_addr < 0) { + ret = priv->phy_addr; + goto free; + } + > >> Signed-off-by: Colin Ian King <colin.king@canonical.com> >> --- >> drivers/net/usb/ax88172a.c | 3 ++- >> 1 file changed, 2 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/net/usb/ax88172a.c b/drivers/net/usb/ax88172a.c >> index 2e2081346740..e24773bb9398 100644 >> --- a/drivers/net/usb/ax88172a.c >> +++ b/drivers/net/usb/ax88172a.c >> @@ -205,7 +205,8 @@ static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf) >> goto free; >> } >> >> - priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy); >> + ret = asix_read_phy_addr(dev, priv->use_embdphy); >> + priv->phy_addr = ret; > > Ah.. it is same bug in different color :) > You probably wonted to do: > if (ret < 0) > goto free; > > priv->phy_addr = ret; Doh, brain failure of mine. I'll send a V2 later today. > >> if (priv->phy_addr < 0) { >> ret = priv->phy_addr; >> goto free; >> -- >> 2.31.1 >> >> > ^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH 2/2][next] net: usb: asix: ax88772: net: Fix less than zero comparison of a u16 2021-06-09 9:51 ` Colin Ian King @ 2021-06-09 11:52 ` Oleksij Rempel 0 siblings, 0 replies; 7+ messages in thread From: Oleksij Rempel @ 2021-06-09 11:52 UTC (permalink / raw) To: Colin Ian King Cc: David S . Miller, Jakub Kicinski, Oleksij Rempel, linux-usb, netdev, kernel-janitors, linux-kernel On Wed, Jun 09, 2021 at 10:51:09AM +0100, Colin Ian King wrote: > On 08/06/2021 19:11, Oleksij Rempel wrote: > > On Tue, Jun 08, 2021 at 04:22:49PM +0100, Colin King wrote: > >> From: Colin Ian King <colin.king@canonical.com> > >> > >> The comparison of the u16 priv->phy_addr < 0 is always false because > >> phy_addr is unsigned. Fix this by assigning the return from the call > >> to function asix_read_phy_addr to int ret and using this for the > >> less than zero error check comparison. > >> > >> Addresses-Coverity: ("Unsigned compared against 0") > >> Fixes: 7e88b11a862a ("net: usb: asix: refactor asix_read_phy_addr() and handle errors on return") > > > > Here is wrong Fixes tag. This assignment was bogus before this patch. > > I'm not sure that's correct, that commit has the following change in it: > > diff --git a/drivers/net/usb/ax88172a.c b/drivers/net/usb/ax88172a.c > index b404c9462dce..c8ca5187eece 100644 > --- a/drivers/net/usb/ax88172a.c > +++ b/drivers/net/usb/ax88172a.c > @@ -220,6 +220,11 @@ static int ax88172a_bind(struct usbnet *dev, struct > usb_interface *intf) > } > > priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy); > + if (priv->phy_addr < 0) { > + ret = priv->phy_addr; > + goto free; > + } > + > Even before my patch asix_read_phy_addr() was returning different error values. My patch just add check for the return value. > > > >> Signed-off-by: Colin Ian King <colin.king@canonical.com> > >> --- > >> drivers/net/usb/ax88172a.c | 3 ++- > >> 1 file changed, 2 insertions(+), 1 deletion(-) > >> > >> diff --git a/drivers/net/usb/ax88172a.c b/drivers/net/usb/ax88172a.c > >> index 2e2081346740..e24773bb9398 100644 > >> --- a/drivers/net/usb/ax88172a.c > >> +++ b/drivers/net/usb/ax88172a.c > >> @@ -205,7 +205,8 @@ static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf) > >> goto free; > >> } > >> > >> - priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy); > >> + ret = asix_read_phy_addr(dev, priv->use_embdphy); > >> + priv->phy_addr = ret; > > > > Ah.. it is same bug in different color :) > > You probably wonted to do: > > if (ret < 0) > > goto free; > > > > priv->phy_addr = ret; > > Doh, brain failure of mine. I'll send a V2 later today. > > > > >> if (priv->phy_addr < 0) { > >> ret = priv->phy_addr; > >> goto free; > >> -- > >> 2.31.1 > >> > >> > > > > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 1/2][next] net: usb: asix: Fix less than zero comparison of a u16 2021-06-08 15:22 [PATCH 1/2][next] net: usb: asix: Fix less than zero comparison of a u16 Colin King 2021-06-08 15:22 ` [PATCH 2/2][next] net: usb: asix: ax88772: net: " Colin King @ 2021-06-08 17:58 ` Oleksij Rempel 2021-06-09 9:27 ` Dan Carpenter 2 siblings, 0 replies; 7+ messages in thread From: Oleksij Rempel @ 2021-06-08 17:58 UTC (permalink / raw) To: Colin King Cc: David S . Miller, Jakub Kicinski, Oleksij Rempel, linux-usb, netdev, kernel-janitors, linux-kernel On Tue, Jun 08, 2021 at 04:22:48PM +0100, Colin King wrote: > From: Colin Ian King <colin.king@canonical.com> > > The comparison of the u16 priv->phy_addr < 0 is always false because > phy_addr is unsigned. Fix this by assigning the return from the call > to function asix_read_phy_addr to int ret and using this for the > less than zero error check comparison. > > Addresses-Coverity: ("Unsigned compared against 0") > Fixes: e532a096be0e ("net: usb: asix: ax88772: add phylib support") > Signed-off-by: Colin Ian King <colin.king@canonical.com> > --- > drivers/net/usb/asix_devices.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c > index 57dafb3262d9..211c5a87eb15 100644 > --- a/drivers/net/usb/asix_devices.c > +++ b/drivers/net/usb/asix_devices.c > @@ -704,9 +704,10 @@ static int ax88772_init_phy(struct usbnet *dev) > struct asix_common_private *priv = dev->driver_priv; > int ret; > > - priv->phy_addr = asix_read_phy_addr(dev, true); > - if (priv->phy_addr < 0) > + ret = asix_read_phy_addr(dev, true); > + if (ret < 0) > return priv->phy_addr; please add new line here > + priv->phy_addr = ret; > > snprintf(priv->phy_name, sizeof(priv->phy_name), PHY_ID_FMT, > priv->mdio->id, priv->phy_addr); > -- > 2.31.1 > Thank you! Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de> -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 1/2][next] net: usb: asix: Fix less than zero comparison of a u16 2021-06-08 15:22 [PATCH 1/2][next] net: usb: asix: Fix less than zero comparison of a u16 Colin King 2021-06-08 15:22 ` [PATCH 2/2][next] net: usb: asix: ax88772: net: " Colin King 2021-06-08 17:58 ` [PATCH 1/2][next] net: usb: asix: " Oleksij Rempel @ 2021-06-09 9:27 ` Dan Carpenter 2 siblings, 0 replies; 7+ messages in thread From: Dan Carpenter @ 2021-06-09 9:27 UTC (permalink / raw) To: Colin King Cc: David S . Miller, Jakub Kicinski, Oleksij Rempel, linux-usb, netdev, kernel-janitors, linux-kernel On Tue, Jun 08, 2021 at 04:22:48PM +0100, Colin King wrote: > From: Colin Ian King <colin.king@canonical.com> > > The comparison of the u16 priv->phy_addr < 0 is always false because > phy_addr is unsigned. Fix this by assigning the return from the call > to function asix_read_phy_addr to int ret and using this for the > less than zero error check comparison. > > Addresses-Coverity: ("Unsigned compared against 0") > Fixes: e532a096be0e ("net: usb: asix: ax88772: add phylib support") > Signed-off-by: Colin Ian King <colin.king@canonical.com> > --- > drivers/net/usb/asix_devices.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c > index 57dafb3262d9..211c5a87eb15 100644 > --- a/drivers/net/usb/asix_devices.c > +++ b/drivers/net/usb/asix_devices.c > @@ -704,9 +704,10 @@ static int ax88772_init_phy(struct usbnet *dev) > struct asix_common_private *priv = dev->driver_priv; > int ret; > > - priv->phy_addr = asix_read_phy_addr(dev, true); > - if (priv->phy_addr < 0) > + ret = asix_read_phy_addr(dev, true); > + if (ret < 0) > return priv->phy_addr; return ret; regards, dan carpenter ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2021-06-09 11:52 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-06-08 15:22 [PATCH 1/2][next] net: usb: asix: Fix less than zero comparison of a u16 Colin King 2021-06-08 15:22 ` [PATCH 2/2][next] net: usb: asix: ax88772: net: " Colin King 2021-06-08 18:11 ` Oleksij Rempel 2021-06-09 9:51 ` Colin Ian King 2021-06-09 11:52 ` Oleksij Rempel 2021-06-08 17:58 ` [PATCH 1/2][next] net: usb: asix: " Oleksij Rempel 2021-06-09 9:27 ` Dan Carpenter
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