codecs: fix mmap security issue #115
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fail to do bounds-check the "offset" value or the map's size, may result in security issue. Signed-off-by: Brian Zhu <brian.zhu@amlogic.com> Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
rcombs
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May 7, 2018
| if (!off) | ||
| off += wq->mem.buf_start; | ||
| off = wq->mem.buf_start; |
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This should be an addition unconditionally.
the mmap is not really been used, drop it for now. It protentially have write primitive which would allow userspace process to write to any physical address, which is a security issue. Signed-off-by: Brian Zhu <brian.zhu@amlogic.com> Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
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this PR try to fix two mmap security issue