bug(dd): when iseek= is a very large number it panics
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U - dd
- Dominant language
- Rust
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Description
Hi, uutils mainteners
we confirmed dd panics when iseek= is a very large number
relunsec@relunsec:~/software/coreutils/target/debug$ ./dd if=a of=b iseek=166727721627616621762772
thread 'main' (112383) panicked at src/uu/dd/src/dd.rs:164:32:
attempt to multiply with overflow
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the reproducing command and inspect src/uu/dd/src/dd.rs at line 164, where the overflow panic is reported. Determine the expected behavior for an excessively large iseek value, then add regression coverage showing that the command no longer panics and run the relevant dd tests.
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
- Mostly clear
- Newbie friendliness
- 68/100