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Add sanity check when calculating alignment

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Martin Bickel 2016-12-28 19:20:37 +01:00 committed by Serge Lamikhov-Center
parent fb5ec079ba
commit 213dbedac2
1 changed files with 5 additions and 0 deletions
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5
elfio/elfio.hpp
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@ -676,6 +676,11 @@ class elfio
// when possible (this is what matters for execution) // when possible (this is what matters for execution)
Elf64_Off req_offset = sec->get_address() - seg->get_virtual_address(); Elf64_Off req_offset = sec->get_address() - seg->get_virtual_address();
Elf64_Off cur_offset = current_file_pos - seg_start_pos; Elf64_Off cur_offset = current_file_pos - seg_start_pos;
if ( req_offset < cur_offset) {
// something has gone awfully wrong, abort!
// secAlign would turn out negative, seeking backwards and overwriting previous data
return false;
}
secAlign = req_offset - cur_offset; secAlign = req_offset - cur_offset;
} }
else if (!section_generated[index]) { else if (!section_generated[index]) {