diff options
| author | Charles Keepax <ckeepax@opensource.wolfsonmicro.com> | 2015-02-17 17:14:41 +0000 |
|---|---|---|
| committer | Inki Dae <inki.dae@samsung.com> | 2015-03-18 20:41:18 +0900 |
| commit | 995fdfb9c8e9cf9707966c6936eb6ea1a8b68194 (patch) | |
| tree | 4ac3d9d7239baeb20098f86dea85154e106207c8 /drivers/target | |
| parent | aed45ab4b07472920ed22ad43b8ffa123c590d57 (diff) | |
drm/exynos: Check for NULL dereference of crtc
The commit "drm/exynos: remove exynos_plane_dpms" (d9ea6256) removed the
use of the enabled flag, which means that the code may attempt to call
win_enable on a NULL crtc. This results in the following oops on
Arndale:
[ 1.673479] Unable to handle kernel NULL pointer dereference at virtual address 00000368
[ 1.681500] pgd = c0004000
[ 1.684154] [00000368] *pgd=00000000
[ 1.687713] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[ 1.693012] Modules linked in:
[ 1.696045] CPU: 1 PID: 1 Comm: swapper/0 Not tainted
3.19.0-07545-g57485fa #1907
[ 1.703524] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
(....)
[ 2.014803] [<c02f9cfc>] (exynos_plane_destroy) from [<c02e61b4>] (drm_mode_config_cleanup+0x168/0x20c)
[ 2.024178] [<c02e61b4>] (drm_mode_config_cleanup) from [<c02f66fc>] (exynos_drm_load+0xac/0x12c)
This patch adds in a check to ensure exynos_crtc is not NULL before it
is dereferenced.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Diffstat (limited to 'drivers/target')
0 files changed, 0 insertions, 0 deletions