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disp: msm: sde: add check to fix null pointer dereference

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In pstate_cmp the plane_state structures are accessed
without checking it is allocated or not, which leads to
null pointer dereference. To fix it NULL check is added.

Change-Id: I5982138b396b70979205d87bc9aa260d9501fee0
Signed-off-by: Mahadevan <mahap@codeaurora.org>
This commit is contained in:
Mahadevan
2020-11-17 19:11:16 +05:30
parent 987888e623
commit a3fdf9025e
1 changed files with 3 additions and 0 deletions
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3
msm/sde/sde_crtc.c
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@@ -1193,6 +1193,9 @@ static int pstate_cmp(const void *a, const void *b)
int pa_zpos, pb_zpos;
enum sde_layout pa_layout, pb_layout;
if ((!pa || !pa->sde_pstate) || (!pb || !pb->sde_pstate))
return rc;
pa_zpos = sde_plane_get_property(pa->sde_pstate, PLANE_PROP_ZPOS);
pb_zpos = sde_plane_get_property(pb->sde_pstate, PLANE_PROP_ZPOS);