bug(dd): when seek= is a very large number it panics

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
78/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Quiet
Tech stack
rust
Domain
cli

Research direction

Start at src/uu/dd/src/dd.rs:164 and reproduce the reported command with a very large seek= value. Trace the multiplication that overflows and determine the intended handling for this input. Done means dd no longer panics with an overflow for the reported case.

Written by the indexing model from the issue text.

Description

U - dd

Hi, uutils mainteners

we confirmed dd panics when seek= is a very large number

relunsec@relunsec:~/software/coreutils/target/debug$ ./dd if=a of=b seek=177272772262766267

thread 'main' (109057) 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
Dominant language
Rust
Stars
24.1k
Forks
2k
Avg merge
1d 4h
Merged PRs (30d)
371

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