70166d62a2
fdt_string() is used to retrieve strings from a DT blob's strings section. It's rarely used directly, but is widely used internally. However, it doesn't do any bounds checking, which means in the case of a corrupted blob it could access bad memory, which libfdt is supposed to avoid. This write a safe alternative to fdt_string, fdt_get_string(). It checks both that the given offset is within the string section and that the string it points to is properly \0 terminated within the section. It also returns the string's length as a convenience (since it needs to determine to do the checks anyway). fdt_string() is rewritten in terms of fdt_get_string() for compatibility. Most of the diff here is actually testing infrastructure. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
71 lines
1.4 KiB
Text
71 lines
1.4 KiB
Text
LIBFDT_1.2 {
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global:
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fdt_next_node;
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fdt_check_header;
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fdt_move;
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fdt_string;
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fdt_num_mem_rsv;
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fdt_get_mem_rsv;
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fdt_subnode_offset_namelen;
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fdt_subnode_offset;
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fdt_path_offset_namelen;
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fdt_path_offset;
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fdt_get_name;
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fdt_get_property_namelen;
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fdt_get_property;
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fdt_getprop_namelen;
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fdt_getprop;
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fdt_get_phandle;
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fdt_get_alias_namelen;
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fdt_get_alias;
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fdt_get_path;
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fdt_supernode_atdepth_offset;
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fdt_node_depth;
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fdt_parent_offset;
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fdt_node_offset_by_prop_value;
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fdt_node_offset_by_phandle;
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fdt_node_check_compatible;
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fdt_node_offset_by_compatible;
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fdt_setprop_inplace;
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fdt_nop_property;
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fdt_nop_node;
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fdt_create;
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fdt_add_reservemap_entry;
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fdt_finish_reservemap;
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fdt_begin_node;
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fdt_property;
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fdt_end_node;
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fdt_finish;
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fdt_open_into;
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fdt_pack;
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fdt_add_mem_rsv;
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fdt_del_mem_rsv;
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fdt_set_name;
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fdt_setprop;
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fdt_delprop;
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fdt_add_subnode_namelen;
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fdt_add_subnode;
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fdt_del_node;
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fdt_strerror;
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fdt_offset_ptr;
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fdt_next_tag;
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fdt_appendprop;
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fdt_create_empty_tree;
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fdt_first_property_offset;
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fdt_get_property_by_offset;
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fdt_getprop_by_offset;
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fdt_next_property_offset;
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fdt_first_subnode;
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fdt_next_subnode;
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fdt_address_cells;
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fdt_size_cells;
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fdt_stringlist_contains;
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fdt_stringlist_count;
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fdt_stringlist_search;
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fdt_stringlist_get;
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fdt_resize;
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fdt_overlay_apply;
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fdt_get_string;
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local:
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*;
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};
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