dilim/CMake
1
0
Fork 0
mirror of https://github.com/Kitware/CMake.git synced 2026-06-24 08:47:59 +00:00
Code Issues Packages Projects Releases Wiki Activity

libarchive: Avoid zstd compression levels beyond 19 in zip format

Browse Source 
We document Zstd compression levels up to 19.  However, the zip
format defines compression level range 0 through 9.  libarchive
scales it into range `ZSTD_minCLevel()` to `ZSTD_maxCLevel()`.
Zstd compression levels beyond 19 require large memory allocations
which may fail on some platforms, such as 32-bit Linux.

Fixes: #27712
This commit is contained in:
Brad King
2026-03-24 17:54:02 -04:00
parent f278888171
commit 04ff010887
1 changed files with 4 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
Utilities/cmlibarchive/libarchive/archive_write_set_format_zip.c
View File

@@ -1362,9 +1362,12 @@ archive_write_zip_header(struct archive_write *a, struct archive_entry *entry)
* zlib's 0 to 9 scale and its negative scale is way bigger than
* its positive one. So setting 1 as the lowest allowed compression
* level and rescaling to 2 to 9 to libzstd's positive scale. */
int zstd_maxCLevel = ZSTD_maxCLevel() <= 19
? ZSTD_maxCLevel()
: 19;
int zstd_compression_level = zip->compression_level == 1
? ZSTD_minCLevel() // ZSTD_minCLevel is negative !
: (zip->compression_level - 1) * ZSTD_maxCLevel() / 8;
: (zip->compression_level - 1) * zstd_maxCLevel / 8;
#ifdef _AIX
if (zstd_compression_level > 6) {
zstd_compression_level = 6;