bug(dd): when count= is a very large number it panics
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U - dd
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- Rust
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Description
Hi, uutils mainteners
we confirmed dd panics when count= is a very large number
relunsec@relunsec:~/software/coreutils/target/debug$ ./dd if=a of=b count=177817277272177278
thread 'main' (107552) panicked at src/uu/dd/src/dd.rs:1425:42:
attempt to multiply with overflow
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
relunsec@relunsec:~/software/coreutils/target/debug$
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- Read the whole issue, then the project's contributing guide.
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Research direction
Start with src/uu/dd/src/dd.rs:1425 and reproduce the panic using dd if=a of=b count=177817277272177278. Trace the overflowing multiplication and verify that handling this very large count no longer panics.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- cli
- Issue type
- Bug
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Quiet
- Clarity
- Clearly specified
- Newbie friendliness
- 76/100