lua-lsm: validate numeric capability arguments#13
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* lua-lsm: validate inode_init_security xattr output * lua-lsm: own inode_init_security xattr name storage * lua-lsm: document OCFS2 xattr name lifetime issue --------- Signed-off-by: Zongyao Chen <ZongYao.Chen@linux.alibaba.com>
arg2cap() accepts capability names and numeric capability values. The name path resolves values from a fixed table, but the numeric path returned the Lua integer without checking that it names a valid capability. Callers pass the result to helpers such as cap_raise(), cap_lower(), and cap_capable(). Reject invalid values in arg2cap() so Lua policy cannot drive capability helpers with out-of-range bit numbers. Signed-off-by: Zongyao Chen <ZongYao.Chen@linux.alibaba.com>
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arg2cap() accepts capability names and numeric capability values. The name path resolves values from a fixed table, but the numeric path returned the Lua integer without checking that it names a valid capability.
Callers pass the result to helpers such as cap_raise(), cap_lower(), and cap_capable(). Reject invalid values in arg2cap() so Lua policy cannot drive capability helpers with out-of-range bit numbers.
Validation:
Signed-off-by: Zongyao Chen ZongYao.Chen@linux.alibaba.com