* [PATCH 0/3] Move call to PTR_ERR after reassignment
@ 2012-02-02 14:52 Julia Lawall
2012-02-02 14:53 ` [PATCH 1/3 v2] drivers/power/pda_power.c: " Julia Lawall
` (2 more replies)
0 siblings, 3 replies; 8+ messages in thread
From: Julia Lawall @ 2012-02-02 14:52 UTC (permalink / raw)
To: linux-kernel; +Cc: kernel-janitors
These patches fix cases where a location is reset to NULL before being
passed to PTR_ERR.
^ permalink raw reply [flat|nested] 8+ messages in thread* [PATCH 1/3 v2] drivers/power/pda_power.c: Move call to PTR_ERR after reassignment 2012-02-02 14:52 [PATCH 0/3] Move call to PTR_ERR after reassignment Julia Lawall @ 2012-02-02 14:53 ` Julia Lawall 2012-02-02 14:53 ` [PATCH 2/3 v2] drivers/net/ethernet/ti: " Julia Lawall 2012-02-02 14:53 ` [PATCH 3/3 v2] kernel/rcutorture.c: " Julia Lawall 2 siblings, 0 replies; 8+ messages in thread From: Julia Lawall @ 2012-02-02 14:53 UTC (permalink / raw) To: linux-kernel; +Cc: kernel-janitors From: Julia Lawall <Julia.Lawall@lip6.fr> PTR_ERR should be called before its argument is cleared. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression e,e1; constant c; @@ *e = c ... when != e = e1 when != &e when != true IS_ERR(e) *PTR_ERR(e) // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Reported-by: Josh Triplett <josh@joshtriplett.org> --- This patch probably only half way solves the problem with this code. It would seem that it should have a goto at the end, but I am not sure to where. v2: correct commit message. drivers/power/pda_power.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c index fd49689..16611c3 100644 --- a/drivers/power/pda_power.c +++ b/drivers/power/pda_power.c @@ -316,8 +316,8 @@ static int pda_power_probe(struct platform_device *pdev) ac_draw = regulator_get(dev, "ac_draw"); if (IS_ERR(ac_draw)) { dev_dbg(dev, "couldn't get ac_draw regulator\n"); - ac_draw = NULL; ret = PTR_ERR(ac_draw); + ac_draw = NULL; } #ifdef CONFIG_USB_OTG_UTILS ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 2/3 v2] drivers/net/ethernet/ti: Move call to PTR_ERR after reassignment 2012-02-02 14:52 [PATCH 0/3] Move call to PTR_ERR after reassignment Julia Lawall 2012-02-02 14:53 ` [PATCH 1/3 v2] drivers/power/pda_power.c: " Julia Lawall @ 2012-02-02 14:53 ` Julia Lawall [not found] ` <CABPrwzf0hH+2OOFQ2Q6ZVHwn=Ws3SvxbwVn0LwKjfkYVdP8zgg@mail.gmail.com> 2012-02-02 19:37 ` David Miller 2012-02-02 14:53 ` [PATCH 3/3 v2] kernel/rcutorture.c: " Julia Lawall 2 siblings, 2 replies; 8+ messages in thread From: Julia Lawall @ 2012-02-02 14:53 UTC (permalink / raw) To: netdev; +Cc: kernel-janitors, linux-kernel From: Julia Lawall <Julia.Lawall@lip6.fr> PTR_ERR should be called before its argument is cleared. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression e,e1; constant c; @@ *e = c ... when != e = e1 when != &e when != true IS_ERR(e) *PTR_ERR(e) // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Reported-by: Josh Triplett <josh@joshtriplett.org> --- v2: correct commit message. drivers/net/ethernet/ti/davinci_emac.c | 3 ++- drivers/net/ethernet/ti/davinci_mdio.c | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c index efd4f3e..922a937 100644 --- a/drivers/net/ethernet/ti/davinci_emac.c +++ b/drivers/net/ethernet/ti/davinci_emac.c @@ -1600,8 +1600,9 @@ static int emac_dev_open(struct net_device *ndev) if (IS_ERR(priv->phydev)) { dev_err(emac_dev, "could not connect to phy %s\n", priv->phy_id); + ret = PTR_ERR(priv->phydev); priv->phydev = NULL; - return PTR_ERR(priv->phydev); + return ret; } priv->link = 0; diff --git a/drivers/net/ethernet/ti/davinci_mdio.c b/drivers/net/ethernet/ti/davinci_mdio.c index ef7c9c1..af8b8fc 100644 --- a/drivers/net/ethernet/ti/davinci_mdio.c +++ b/drivers/net/ethernet/ti/davinci_mdio.c @@ -318,9 +318,9 @@ static int __devinit davinci_mdio_probe(struct platform_device *pdev) data->clk = clk_get(dev, NULL); if (IS_ERR(data->clk)) { - data->clk = NULL; dev_err(dev, "failed to get device clock\n"); ret = PTR_ERR(data->clk); + data->clk = NULL; goto bail_out; } ^ permalink raw reply related [flat|nested] 8+ messages in thread
[parent not found: <CABPrwzf0hH+2OOFQ2Q6ZVHwn=Ws3SvxbwVn0LwKjfkYVdP8zgg@mail.gmail.com>]
* Re: [PATCH 2/3 v2] drivers/net/ethernet/ti: Move call to PTR_ERR after reassignment [not found] ` <CABPrwzf0hH+2OOFQ2Q6ZVHwn=Ws3SvxbwVn0LwKjfkYVdP8zgg@mail.gmail.com> @ 2012-02-02 16:05 ` Julia Lawall 0 siblings, 0 replies; 8+ messages in thread From: Julia Lawall @ 2012-02-02 16:05 UTC (permalink / raw) To: D A; +Cc: kernel-janitors, linux-kernel [-- Attachment #1: Type: TEXT/PLAIN, Size: 3234 bytes --] On Thu, 2 Feb 2012, D A wrote: > hello all, > > im in the janitors for a while now and i keep looking at the emails you keep > sending to eachother, but i m lost, i have a back ground in C how can i be > part of this, any body can give some help to start, a small task that i can > begin with ? There are hundreds of places where the various devm_ functions, eg devm_kzalloc, could be used. Proceed slowly and carefully... Documentation/driver-model/devres.txt julia > > there must be a way or a strategy to absorb new members, i m 3 months now or > more. > > > On Thu, Feb 2, 2012 at 4:53 PM, Julia Lawall <Julia.Lawall@lip6.fr> wrote: > From: Julia Lawall <Julia.Lawall@lip6.fr> > > PTR_ERR should be called before its argument is cleared. > > The semantic match that finds this problem is as follows: > (http://coccinelle.lip6.fr/) > > // <smpl> > @@ > expression e,e1; > constant c; > @@ > > *e = c > ... when != e = e1 > when != &e > when != true IS_ERR(e) > *PTR_ERR(e) > // </smpl> > > Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> > Reported-by: Josh Triplett <josh@joshtriplett.org> > > --- > v2: correct commit message. > > drivers/net/ethernet/ti/davinci_emac.c | 3 ++- > drivers/net/ethernet/ti/davinci_mdio.c | 2 +- > 2 files changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/ethernet/ti/davinci_emac.c > b/drivers/net/ethernet/ti/davinci_emac.c > index efd4f3e..922a937 100644 > --- a/drivers/net/ethernet/ti/davinci_emac.c > +++ b/drivers/net/ethernet/ti/davinci_emac.c > @@ -1600,8 +1600,9 @@ static int emac_dev_open(struct net_device > *ndev) > if (IS_ERR(priv->phydev)) { > dev_err(emac_dev, "could not connect to > phy %s\n", > priv->phy_id); > + ret = PTR_ERR(priv->phydev); > priv->phydev = NULL; > - return PTR_ERR(priv->phydev); > + return ret; > } > > priv->link = 0; > diff --git a/drivers/net/ethernet/ti/davinci_mdio.c > b/drivers/net/ethernet/ti/davinci_mdio.c > index ef7c9c1..af8b8fc 100644 > --- a/drivers/net/ethernet/ti/davinci_mdio.c > +++ b/drivers/net/ethernet/ti/davinci_mdio.c > @@ -318,9 +318,9 @@ static int __devinit > davinci_mdio_probe(struct platform_device *pdev) > > data->clk = clk_get(dev, NULL); > if (IS_ERR(data->clk)) { > - data->clk = NULL; > dev_err(dev, "failed to get device clock\n"); > ret = PTR_ERR(data->clk); > + data->clk = NULL; > goto bail_out; > } > > > -- > To unsubscribe from this list: send the line "unsubscribe > kernel-janitors" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at > http://vger.kernel.org/majordomo-info.html > > > > ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 2/3 v2] drivers/net/ethernet/ti: Move call to PTR_ERR after reassignment 2012-02-02 14:53 ` [PATCH 2/3 v2] drivers/net/ethernet/ti: " Julia Lawall [not found] ` <CABPrwzf0hH+2OOFQ2Q6ZVHwn=Ws3SvxbwVn0LwKjfkYVdP8zgg@mail.gmail.com> @ 2012-02-02 19:37 ` David Miller 1 sibling, 0 replies; 8+ messages in thread From: David Miller @ 2012-02-02 19:37 UTC (permalink / raw) To: Julia.Lawall; +Cc: netdev, kernel-janitors, linux-kernel From: Julia Lawall <Julia.Lawall@lip6.fr> Date: Thu, 2 Feb 2012 15:53:01 +0100 > From: Julia Lawall <Julia.Lawall@lip6.fr> > > PTR_ERR should be called before its argument is cleared. > > The semantic match that finds this problem is as follows: > (http://coccinelle.lip6.fr/) ... > Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> > Reported-by: Josh Triplett <josh@joshtriplett.org> Applied, thanks. ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH 3/3 v2] kernel/rcutorture.c: Move call to PTR_ERR after reassignment 2012-02-02 14:52 [PATCH 0/3] Move call to PTR_ERR after reassignment Julia Lawall 2012-02-02 14:53 ` [PATCH 1/3 v2] drivers/power/pda_power.c: " Julia Lawall 2012-02-02 14:53 ` [PATCH 2/3 v2] drivers/net/ethernet/ti: " Julia Lawall @ 2012-02-02 14:53 ` Julia Lawall 2012-02-02 15:53 ` Paul E. McKenney 2 siblings, 1 reply; 8+ messages in thread From: Julia Lawall @ 2012-02-02 14:53 UTC (permalink / raw) To: Josh Triplett; +Cc: kernel-janitors, Paul E. McKenney, linux-kernel From: Julia Lawall <Julia.Lawall@lip6.fr> PTR_ERR should be called before its argument is cleared. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression e,e1; constant c; @@ *e = c ... when != e = e1 when != &e when != true IS_ERR(e) *PTR_ERR(e) // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Reported-by: Josh Triplett <josh@joshtriplett.org> --- v2: correct commit message. kernel/rcutorture.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c index a58ac28..4b3cd87 100644 --- a/kernel/rcutorture.c +++ b/kernel/rcutorture.c @@ -1450,12 +1450,15 @@ rcu_torture_onoff(void *arg) static int __cpuinit rcu_torture_onoff_init(void) { + int ret; + if (onoff_interval <= 0) return 0; onoff_task = kthread_run(rcu_torture_onoff, NULL, "rcu_torture_onoff"); if (IS_ERR(onoff_task)) { + ret = PTR_ERR(onoff_task); onoff_task = NULL; - return PTR_ERR(onoff_task); + return ret; } return 0; } ^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH 3/3 v2] kernel/rcutorture.c: Move call to PTR_ERR after reassignment 2012-02-02 14:53 ` [PATCH 3/3 v2] kernel/rcutorture.c: " Julia Lawall @ 2012-02-02 15:53 ` Paul E. McKenney 0 siblings, 0 replies; 8+ messages in thread From: Paul E. McKenney @ 2012-02-02 15:53 UTC (permalink / raw) To: Julia Lawall; +Cc: Josh Triplett, kernel-janitors, linux-kernel Queued, thank you both! Thanx, Paul On Thu, Feb 02, 2012 at 03:53:02PM +0100, Julia Lawall wrote: > From: Julia Lawall <Julia.Lawall@lip6.fr> > > PTR_ERR should be called before its argument is cleared. > > The semantic match that finds this problem is as follows: > (http://coccinelle.lip6.fr/) > > // <smpl> > @@ > expression e,e1; > constant c; > @@ > > *e = c > ... when != e = e1 > when != &e > when != true IS_ERR(e) > *PTR_ERR(e) > // </smpl> > > Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> > Reported-by: Josh Triplett <josh@joshtriplett.org> > > --- > v2: correct commit message. > > kernel/rcutorture.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c > index a58ac28..4b3cd87 100644 > --- a/kernel/rcutorture.c > +++ b/kernel/rcutorture.c > @@ -1450,12 +1450,15 @@ rcu_torture_onoff(void *arg) > static int __cpuinit > rcu_torture_onoff_init(void) > { > + int ret; > + > if (onoff_interval <= 0) > return 0; > onoff_task = kthread_run(rcu_torture_onoff, NULL, "rcu_torture_onoff"); > if (IS_ERR(onoff_task)) { > + ret = PTR_ERR(onoff_task); > onoff_task = NULL; > - return PTR_ERR(onoff_task); > + return ret; > } > return 0; > } > ^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH 0/3] Move call to PTR_ERR after reassignment @ 2012-02-02 14:00 Julia Lawall 0 siblings, 0 replies; 8+ messages in thread From: Julia Lawall @ 2012-02-02 14:00 UTC (permalink / raw) To: linux-kernel; +Cc: kernel-janitors These patches fix cases where a location is reset to NULL before being passed to PTR_ERR. ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2012-02-02 19:39 UTC | newest]
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2012-02-02 14:52 [PATCH 0/3] Move call to PTR_ERR after reassignment Julia Lawall
2012-02-02 14:53 ` [PATCH 1/3 v2] drivers/power/pda_power.c: " Julia Lawall
2012-02-02 14:53 ` [PATCH 2/3 v2] drivers/net/ethernet/ti: " Julia Lawall
[not found] ` <CABPrwzf0hH+2OOFQ2Q6ZVHwn=Ws3SvxbwVn0LwKjfkYVdP8zgg@mail.gmail.com>
2012-02-02 16:05 ` Julia Lawall
2012-02-02 19:37 ` David Miller
2012-02-02 14:53 ` [PATCH 3/3 v2] kernel/rcutorture.c: " Julia Lawall
2012-02-02 15:53 ` Paul E. McKenney
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2012-02-02 14:00 [PATCH 0/3] " Julia Lawall
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