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| author | Jia-Ju Bai <baijiaju@tsinghua.edu.cn> | 2020-05-30 16:42:08 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-06-23 15:09:43 +0200 |
| commit | 6499a0db9b0f1e903d52f8244eacc1d4be00eea2 (patch) | |
| tree | e5c4c00e9129804e6cedd597c1792998926283d2 /tools/perf/scripts/python | |
| parent | bc76369b89bbbbd01b2a3852287ea8092b59d012 (diff) | |
| download | linux-6499a0db9b0f1e903d52f8244eacc1d4be00eea2.tar.gz linux-6499a0db9b0f1e903d52f8244eacc1d4be00eea2.zip | |
media: pci: ttpci: av7110: fix possible buffer overflow caused by bad DMA value in debiirq()
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>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions