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| author | Jia-Ju Bai <baijiaju@tsinghua.edu.cn> | 2020-05-30 16:42:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-03 11:26:42 +0200 |
| commit | fc93c091de224f62129c9b9c7f676fc893a2fb04 (patch) | |
| tree | cb0edf8016723037ecd6f665926f9a038d7e574c /kernel/trace | |
| parent | 1dc0ed18219a6eec44a66a0445d1f74cc59b5497 (diff) | |
media: pci: ttpci: av7110: fix possible buffer overflow caused by bad DMA value in debiirq()
[ Upstream commit 6499a0db9b0f1e903d52f8244eacc1d4be00eea2 ]
The value av7110->debi_virt is stored in DMA memory, and it is assigned
to data, and thus data[0] can be modified at any time by malicious
hardware. In this case, "if (data[0] < 2)" can be passed, but then
data[0] can be changed into a large number, which may cause buffer
overflow when the code "av7110->ci_slot[data[0]]" is used.
To fix this possible bug, data[0] is assigned to a local variable, which
replaces the use of data[0].
Signed-off-by: Jia-Ju Bai <baijiaju@tsinghua.edu.cn>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel/trace')
0 files changed, 0 insertions, 0 deletions