Ma Ke f70ffeca54 drm/gma500: fix null pointer dereference in psb_intel_lvds_get_modes ...

commit 2df7aac81070987b0f052985856aa325a38debf6 upstream.

In psb_intel_lvds_get_modes(), the return value of drm_mode_duplicate() is
assigned to mode, which will lead to a possible NULL pointer dereference
on failure of drm_mode_duplicate(). Add a check to avoid npd.

Cc: stable@vger.kernel.org
Fixes: 89c78134cc ("gma500: Add Poulsbo support")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240709092011.3204970-1-make24@iscas.ac.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2024-08-03 08:49:32 +02:00

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backlight.c

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cdv_device.c

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cdv_device.h

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cdv_intel_crt.c

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cdv_intel_display.c

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cdv_intel_dp.c

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cdv_intel_hdmi.c

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cdv_intel_lvds.c

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framebuffer.c

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framebuffer.h

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gem.c

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gem.h

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gma_device.c

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gma_device.h

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gma_display.c

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gma_display.h

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gtt.c

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gtt.h

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intel_bios.c

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intel_bios.h

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intel_gmbus.c

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intel_i2c.c

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Kconfig

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Makefile

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mid_bios.c

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mid_bios.h

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mmu.c

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mmu.h

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oaktrail_crtc.c

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oaktrail_device.c

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oaktrail_hdmi_i2c.c

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oaktrail_hdmi.c

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oaktrail_lvds_i2c.c

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oaktrail_lvds.c

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oaktrail.h

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opregion.c

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opregion.h

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power.c

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power.h

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psb_device.c

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psb_device.h

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psb_drv.c

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psb_drv.h

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psb_intel_display.c

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psb_intel_drv.h

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psb_intel_lvds.c

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psb_intel_modes.c

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psb_intel_reg.h

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psb_intel_sdvo_regs.h

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psb_intel_sdvo.c

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psb_irq.c

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psb_irq.h

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psb_lid.c

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psb_reg.h

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