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vdec: fix crash in vdec_get_default_vdec_for_userdata. [1/1]

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PD#SWPL-6811

Problem:
Unable to handle kernel NULL pointer dereference at virtual address 00000114
PC is at vdec_get_default_vdec_for_userdata+0x50/0x8c [decoder_common]
LR is at 0x0

Solution:
vdec in vdec_connect_list searched is NULL, it's
may moved to disconnect list.

Verify:
x301

Change-Id: I407b0115fd4dfacf2bf575f1d981e079702b8800
Signed-off-by: shihong.zheng <shihong.zheng@amlogic.com>
This commit is contained in:
shihong.zheng
2019-04-18 17:07:42 +08:00
committed by Dongjin Kim
parent ebb06aed1a
commit e138484e6a
1 changed files with 3 additions and 0 deletions
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3
drivers/amlogic/media_modules/frame_provider/decoder/utils/vdec.c
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@@ -2554,6 +2554,7 @@ static int vdec_core_thread(void *data)
{
struct vdec_core_s *core = (struct vdec_core_s *)data;
struct sched_param param = {.sched_priority = MAX_RT_PRIO/2};
unsigned long flags;
int i;
sched_setscheduler(current, SCHED_FIFO, &param);
@@ -2629,6 +2630,7 @@ static int vdec_core_thread(void *data)
*/
/* check disconnected decoders */
flags = vdec_core_lock(vdec_core);
list_for_each_entry_safe(vdec, tmp,
&core->connected_vdec_list, list) {
if ((vdec->status == VDEC_STATUS_CONNECTED) &&
@@ -2644,6 +2646,7 @@ static int vdec_core_thread(void *data)
list_move(&vdec->list, &disconnecting_list);
}
}
vdec_core_unlock(vdec_core, flags);
mutex_unlock(&vdec_mutex);
/* elect next vdec to be scheduled */
vdec = core->last_vdec;