https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280371
Bug ID: 280371
Summary: diff(1) attempts to allocate ~10^20 bytes while
comparing 32GB text files
Product: Base System
Version: 14.1-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
I tried to compare 2 large files:
> $ diff broadinstitute-gatk-4.6.0.0_GH0.tar.good.hex
> broadinstitute-gatk-4.6.0.0_GH0.tar.bad.hex | more
> diff: xreallocarray: allocating 18446744073509292634 * 12 bytes: Cannot
> allocate memory
File sizes:
> $ ls -l broadinstitute-gatk-4.6.0.0_GH0.tar.good.hex
> broadinstitute-gatk-4.6.0.0_GH0.tar.bad.hex
> -rw-r--r-- 1 yuri users 32676484755 Jul 18 21:07
> broadinstitute-gatk-4.6.0.0_GH0.tar.bad.hex
> -rw-r--r-- 1 yuri users 32676397537 Jul 18 20:06
> broadinstitute-gatk-4.6.0.0_GH0.tar.good.hex
These files have some differences in the middle.
The failure is most likely due to an overflow.
diff(1) should be able to compare 32GB files without the need to allocate much
more memory than file sizes.
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