linux/drivers/gpu/drm
Gustavo A. R. Silva 89f3f35620 drm/fb-helper: Fix potential NULL pointer dereference
fb_helper is being dereferenced before it is null checked,
hence there is a potential null pointer dereference.

Fix this by moving the pointer dereference after fb_helper
has been null checked.

This issue was detected with the help of Coccinelle.

Fixes: c777990fb4 ("drm/fb-helper: Handle function NULL argument")
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20171205174628.GA31189@embeddedor.com
2017-12-06 21:45:28 +01:00
..
amd Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
arc drm/arc: Use drm_gem_cma_print_info() 2017-11-11 11:23:15 +01:00
arm Merge arlied/drm-next into drm-misc-next 2017-12-04 16:04:45 -02:00
armada main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
ast main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
atmel-hlcdc main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
bochs main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
bridge Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
cirrus Merge airlied/drm-next into drm-misc-next 2017-11-21 14:17:56 +01:00
etnaviv main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
exynos Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
fsl-dcu drm/fsl-dcu: Use drm_mode_config_helper_suspend/resume() 2017-12-05 13:46:41 +01:00
gma500 Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
hisilicon drm/hisilicon: Ensure LDI regs are properly configured. 2017-11-01 10:36:50 +08:00
i2c Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
i810
i915 drm/i915: Add "panel orientation" property to the panel connector, v6. 2017-12-04 23:03:21 +01:00
imx Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
lib License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mediatek Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
meson drm: Move drm_plane_helper_check_state() into drm_atomic_helper.c 2017-11-20 21:14:22 +02:00
mga
mgag200 main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
msm Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
mxsfb
nouveau Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
omapdrm omapdrm: hdmi4_cec: signedness bug in hdmi4_cec_init() 2017-11-30 12:25:37 +02:00
panel Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
pl111 main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
qxl Merge airlied/drm-next into drm-misc-next 2017-11-21 14:17:56 +01:00
r128
radeon Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
rcar-du main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
rockchip Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
savage
selftests Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
shmobile main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
sis
sti gpu: drm: sti: Adopt SPDX identifiers 2017-12-06 15:51:23 +01:00
stm gpu: drm: stm: Adopt SPDX identifiers 2017-12-06 15:51:37 +01:00
sun4i drm/sun4i: Wire in DE2 YUV support 2017-12-05 13:22:44 +01:00
tdfx
tegra Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
tilcdc Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
tinydrm drm/tinydrm: add driver for ILI9225 panels 2017-12-01 14:08:37 +01:00
ttm Merge branch 'drm-fixes-4.15' of git://people.freedesktop.org/~agd5f/linux into drm-fixes 2017-12-01 09:15:57 +10:00
tve200
udl
vc4 Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
vgem treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
via Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
virtio Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
vmwgfx Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
zte Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
ati_pcigart.c
drm_agpsupport.c
drm_atomic_helper.c Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
drm_atomic.c Merge airlied/drm-next into drm-misc-next 2017-11-21 14:17:56 +01:00
drm_auth.c
drm_blend.c
drm_bridge.c
drm_bufs.c
drm_cache.c
drm_color_mgmt.c
drm_connector.c drm: Add support for a panel-orientation connector property, v6 2017-12-04 23:03:21 +01:00
drm_context.c
drm_crtc_helper_internal.h
drm_crtc_helper.c
drm_crtc_internal.h
drm_crtc.c
drm_debugfs_crc.c
drm_debugfs.c drm/debugfs: Fix framebuffer debugfs file init 2017-11-14 11:08:17 +02:00
drm_dma.c
drm_dp_aux_dev.c Pass mode to wait_on_atomic_t() action funcs and provide default actions 2017-11-13 15:38:16 +00:00
drm_dp_dual_mode_helper.c
drm_dp_helper.c drm: don't link DP aux i2c adapter to the hardware device node 2017-11-20 09:34:17 +01:00
drm_dp_mst_topology.c
drm_drv.c Merge airlied/drm-next into drm-misc-next 2017-11-21 14:17:56 +01:00
drm_dumb_buffers.c
drm_edid_load.c
drm_edid.c Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
drm_encoder_slave.c
drm_encoder.c
drm_fb_cma_helper.c drm/cma-helper: Remove drm_fb_cma_debugfs_show() 2017-11-11 11:25:14 +01:00
drm_fb_helper.c drm/fb-helper: Fix potential NULL pointer dereference 2017-12-06 21:45:28 +01:00
drm_file.c
drm_flip_work.c
drm_fourcc.c
drm_framebuffer.c Merge airlied/drm-next into drm-misc-next 2017-11-21 14:17:56 +01:00
drm_gem_cma_helper.c drm: gem_cma_helper.c: Allow importing of contiguous scatterlists with nents > 1 2017-11-15 18:14:46 +01:00
drm_gem_framebuffer_helper.c
drm_gem.c drm/framebuffer: Add framebuffer debugfs file 2017-11-11 11:21:19 +01:00
drm_global.c
drm_hashtab.c
drm_info.c
drm_internal.h Merge airlied/drm-next into drm-misc-next 2017-11-21 14:17:56 +01:00
drm_ioc32.c
drm_ioctl.c
drm_irq.c
drm_kms_helper_common.c
drm_lease.c
drm_legacy.h
drm_lock.c
drm_memory.c
drm_mipi_dsi.c
drm_mm.c drm: Spelling fixes 2017-11-02 11:10:37 -02:00
drm_mode_config.c
drm_mode_object.c drm/mode_object: fix documentation for object lookups. 2017-11-10 13:50:47 +10:00
drm_modes.c
drm_modeset_helper.c drm/modeset-helper: Add simple modeset suspend/resume helpers 2017-11-30 18:18:08 +01:00
drm_modeset_lock.c drm: Require __GFP_NOFAIL for the legacy drm_modeset_lock_all 2017-10-31 17:36:46 +01:00
drm_of.c
drm_panel_orientation_quirks.c drm: Add panel orientation quirks, v6. 2017-12-04 23:03:21 +01:00
drm_panel.c
drm_pci.c
drm_plane_helper.c drm: Move drm_plane_helper_check_state() into drm_atomic_helper.c 2017-11-20 21:14:22 +02:00
drm_plane.c drm/vblank: Pass crtc_id to page_flip_ioctl. 2017-11-23 13:04:19 +01:00
drm_prime.c drm/prime: skip CPU sync in map/unmap dma_buf 2017-12-04 17:30:19 +01:00
drm_print.c drm/printer: Add drm_vprintf() 2017-11-23 12:31:49 +02:00
drm_probe_helper.c drm/probe-helper: Fix drm_kms_helper_poll_enable() docs 2017-11-30 18:17:37 +01:00
drm_property.c
drm_rect.c
drm_scatter.c
drm_scdc_helper.c
drm_simple_kms_helper.c drm: Move drm_plane_helper_check_state() into drm_atomic_helper.c 2017-11-20 21:14:22 +02:00
drm_syncobj.c Merge airlied/drm-next into drm-misc-next 2017-11-21 14:17:56 +01:00
drm_sysfs.c
drm_trace_points.c
drm_trace.h main drm pull request for v4.15 2017-11-15 20:42:10 -08:00
drm_vblank.c Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2017-12-04 05:42:49 +10:00
drm_vm.c
drm_vma_manager.c drm/drm_vma_manager.c: Remove useless goto statement 2017-11-02 10:44:08 +01:00
Kconfig drm: Document that drm_panel_orientation_quirks.c is shared with fbdev 2017-12-05 12:08:57 +01:00
Makefile drm: Add panel orientation quirks, v6. 2017-12-04 23:03:21 +01:00