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image_index.rs: verify file size

This commit is contained in:
Dietmar Maurer 2019-01-02 18:14:02 +01:00
parent 77703d95aa
commit 0b8e75ed16
1 changed files with 12 additions and 1 deletions
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13
src/backup/image_index.rs
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@ -73,7 +73,18 @@ impl <'a> ImageIndexReader<'a> {
let index_size = ((size + chunk_size - 1)/chunk_size)*32; let index_size = ((size + chunk_size - 1)/chunk_size)*32;
// fixme: verify file size ? let rawfd = file.as_raw_fd();
let stat = match nix::sys::stat::fstat(rawfd) {
Ok(stat) => stat,
Err(err) => bail!("fstat {:?} failed - {}", path, err),
};
let expected_index_size = ((stat.st_size as usize) - header_size);
if index_size != expected_index_size {
bail!("got unexpected file size for {:?} ({} != {})",
path, index_size, expected_index_size);
}
let data = unsafe { nix::sys::mman::mmap( let data = unsafe { nix::sys::mman::mmap(
std::ptr::null_mut(), std::ptr::null_mut(),