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Panic due to integer wrapping #72

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evanrichter opened this issue Jul 2, 2022 · 0 comments

evanrichter commented Jul 2, 2022

The attached img file will cause the following subtraction to overflow:

rust-fatfs/src/file.rs

Line 283 in 4892fb1

let bytes_left_in_cluster = (cluster_size - offset_in_cluster) as usize;

The application code can be seen here: https://github.com/evanrichter/rust-fatfs/blob/16f52f4d64c6d54ca9290f66e5167e1f2ddad552/fuzz/fuzz_targets/fs_load.rs

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