Thomas Zimmermann 615cc4223f drm/vesadrm: Avoid NULL-ptr deref in vesadrm_pmi_cmap_write() ... Only set PMI fields if the screen_info's Vesa PM segment has been set. Vesa PMI is the power-management interface. It also provides means to set the color palette. The interface is optional, so not all VESA graphics cards support it. Print vesafb's warning [1] if the hardware palette cannot be set at all. If unsupported the field PrimaryPalette in struct vesadrm.pmi is NULL, which results in a segmentation fault. Happens with qemu's Cirrus emulation. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Fixes: 814d270b31 ("drm/sysfb: vesadrm: Add gamma correction") Link: https://elixir.bootlin.com/linux/v6.15/source/drivers/video/fbdev/vesafb.c#L375 # 1 Cc: Thomas Zimmermann <tzimmermann@suse.de> Cc: Javier Martinez Canillas <javierm@redhat.com> Cc: dri-devel@lists.freedesktop.org Acked-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://lore.kernel.org/r/20250617140944.142392-1-tzimmermann@suse.de		2025-06-27 16:00:49 +02:00
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drm_sysfb.c	drm/sysfb: Share helpers for integer validation	2025-04-14 10:16:13 +02:00
drm_sysfb_helper.h	drm/sysfb: Share helpers for screen_info validation	2025-04-14 10:16:14 +02:00
drm_sysfb_modeset.c	drm/sysfb: Split source file	2025-04-14 10:16:12 +02:00
drm_sysfb_screen_info.c	drm/sysfb: Share helpers for screen_info validation	2025-04-14 10:16:14 +02:00
efidrm.c	drm/sysfb: Share helpers for screen_info validation	2025-04-14 10:16:14 +02:00
Kconfig	drm/sysfb: efidrm: Support module builds	2025-04-09 09:03:15 +02:00
Makefile	drm/sysfb: Share helpers for screen_info validation	2025-04-14 10:16:14 +02:00
ofdrm.c	drm/sysfb: Share helpers for integer validation	2025-04-14 10:16:13 +02:00
simpledrm.c	drm/sysfb: Share helpers for integer validation	2025-04-14 10:16:13 +02:00
vesadrm.c	drm/vesadrm: Avoid NULL-ptr deref in vesadrm_pmi_cmap_write()	2025-06-27 16:00:49 +02:00