drivers/hid/hid-multitouch.c: fix a possible null pointer access.
[ Upstream commit 306d5acbfc
]
1002 if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
1003 struct input_mt_slot *i_slot = &mt->slots[slotnum];
1004
1005 if (input_mt_is_active(i_slot) &&
1006 input_mt_is_used(mt, i_slot))
1007 return -EAGAIN;
1008 }
We previously assumed 'mt' could be null (see line 1002).
The following situation is similar, so add a judgement.
Signed-off-by: Pan Zhang <zhangpan26@huawei.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
parent
32a369776b
commit
b826ffe45a
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@ -1019,7 +1019,7 @@ static int mt_process_slot(struct mt_device *td, struct input_dev *input,
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tool = MT_TOOL_DIAL;
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else if (unlikely(!confidence_state)) {
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tool = MT_TOOL_PALM;
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if (!active &&
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if (!active && mt &&
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input_mt_is_active(&mt->slots[slotnum])) {
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/*
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* The non-confidence was reported for
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