# \[PATCH 2/2\] video: exynos\_mipi\_dsi: Fix potential NULL pointer dereference - Subsystems: FRAMEBUFFER LAYER, THE REST - Maintainers: Helge Deller, Linus Torvalds - List: linux-fbdev - 3 messages, 2 authors - Page: https://ratatoskr.run/linux-fbdev/2012/09/13463865/t ## \[PATCH 2/2\] video: exynos\_mipi\_dsi: Fix potential NULL pointer dereference - From: Sachin Kamat \ - Date: 2012-09-18 11:50:00 - Message: https://ratatoskr.run/linux-fbdev/2012/09/13463865.md ```text The error message printed when dsim is NULL references its member. This will cause NULL pointer derefernce error. Hence change dev_err to pr_err to avoid it. Signed-off-by: Sachin Kamat --- drivers/video/exynos/exynos_mipi_dsi_common.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/video/exynos/exynos_mipi_dsi_common.c b/drivers/video/exynos/exynos_mipi_dsi_common.c index 7cc4113..4fc64c4 100644 --- a/drivers/video/exynos/exynos_mipi_dsi_common.c +++ b/drivers/video/exynos/exynos_mipi_dsi_common.c @@ -80,7 +80,7 @@ irqreturn_t exynos_mipi_dsi_interrupt_handler(int irq, void *dev_id) unsigned int intsrc, intmsk; if (dsim = NULL) { - dev_err(dsim->dev, "%s: wrong parameter\n", __func__); + pr_err("%s: wrong parameter\n", __func__); return IRQ_NONE; } -- 1.7.4.1 ``` ## RE: \[PATCH 2/2\] video: exynos\_mipi\_dsi: Fix potential NULL pointer dereference - From: Inki Dae \ - Date: 2012-09-19 02:28:40 - Message: https://ratatoskr.run/linux-fbdev/2012/09/13463866.md ```text > -----Original Message----- > From: Sachin Kamat [mailto:] > Sent: Tuesday, September 18, 2012 8:38 PM > To: > Cc: inki.dae@samsung.com; ; FlorianSchandinat@gmx.de; > sachin.kamat@linaro.org; patches@linaro.org > Subject: [PATCH 2/2] video: exynos_mipi_dsi: Fix potential NULL pointer > dereference > > The error message printed when dsim is NULL references its member. > This will cause NULL pointer derefernce error. Hence change dev_err > to pr_err to avoid it. > > Signed-off-by: Sachin Kamat > --- > drivers/video/exynos/exynos_mipi_dsi_common.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/drivers/video/exynos/exynos_mipi_dsi_common.c > b/drivers/video/exynos/exynos_mipi_dsi_common.c > index 7cc4113..4fc64c4 100644 > --- a/drivers/video/exynos/exynos_mipi_dsi_common.c > +++ b/drivers/video/exynos/exynos_mipi_dsi_common.c > @@ -80,7 +80,7 @@ irqreturn_t exynos_mipi_dsi_interrupt_handler(int irq, > void *dev_id) > unsigned int intsrc, intmsk; > > if (dsim = NULL) { > - dev_err(dsim->dev, "%s: wrong parameter\n", __func__); > + pr_err("%s: wrong parameter\n", __func__); > return IRQ_NONE; > } Please, just remove above exception codes. dsim was allocated and already checked by probe so this exception isn't needed. Thanks, Inki Dae > > -- > 1.7.4.1 ``` ## Re: \[PATCH 2/2\] video: exynos\_mipi\_dsi: Fix potential NULL pointer dereference - From: Sachin Kamat \ - Date: 2012-09-19 02:49:41 - Message: https://ratatoskr.run/linux-fbdev/2012/09/13463867.md ```text On 19 September 2012 07:58, Inki Dae [ref] wrote: > > >> -----Original Message----- >> From: Sachin Kamat [mailto:] >> Sent: Tuesday, September 18, 2012 8:38 PM >> To: >> Cc: inki.dae@samsung.com; ; FlorianSchandinat@gmx.de; >> sachin.kamat@linaro.org; patches@linaro.org >> Subject: [PATCH 2/2] video: exynos_mipi_dsi: Fix potential NULL pointer >> dereference >> >> The error message printed when dsim is NULL references its member. >> This will cause NULL pointer derefernce error. Hence change dev_err >> to pr_err to avoid it. >> >> Signed-off-by: Sachin Kamat >> --- >> drivers/video/exynos/exynos_mipi_dsi_common.c | 2 +- >> 1 files changed, 1 insertions(+), 1 deletions(-) >> >> diff --git a/drivers/video/exynos/exynos_mipi_dsi_common.c >> b/drivers/video/exynos/exynos_mipi_dsi_common.c >> index 7cc4113..4fc64c4 100644 >> --- a/drivers/video/exynos/exynos_mipi_dsi_common.c >> +++ b/drivers/video/exynos/exynos_mipi_dsi_common.c >> @@ -80,7 +80,7 @@ irqreturn_t exynos_mipi_dsi_interrupt_handler(int irq, >> void *dev_id) >> unsigned int intsrc, intmsk; >> >> if (dsim = NULL) { >> - dev_err(dsim->dev, "%s: wrong parameter\n", __func__); >> + pr_err("%s: wrong parameter\n", __func__); >> return IRQ_NONE; >> } > > Please, just remove above exception codes. dsim was allocated and already > checked by probe so this exception isn't needed. Yes, that looks better if it is already ensured to be non-NULL. I had not checked that. Will remove this check and re-send. Thanks. > > Thanks, > Inki Dae > > >> >> -- >> 1.7.4.1 > -- With warm regards, Sachin ```