If this needs SRU'ing to impish please update the bug description
accordingly. I've sponsored this for Jammy.
** Changed in: zlib (Ubuntu Jammy)
Status: New => In Progress
** Changed in: zlib (Ubuntu Jammy)
Assignee: Skipper Bug Screeners (skipper-screen-team) => Brian Murray
(brian-murray)
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https://bugs.launchpad.net/bugs/1961427
Title:
zlib: compressBound() returns an incorrect result on z15
Status in Ubuntu on IBM z Systems:
New
Status in zlib package in Ubuntu:
In Progress
Status in zlib source package in Impish:
New
Status in zlib source package in Jammy:
In Progress
Bug description:
Description: zlib: compressBound() returns an incorrect result on z15
Symptom: Passing the result of compressBound() to compress()
results in an error code.
Problem: compressBound() is not adjusted for DFLTCC.
Solution: Adjust compressBound() for DFLTCC like it's already done
for deflateBound(). Since zlib project does not accept
patches at the moment, the fix has been integrated into
the DFLTCC pull request:
https://github.com/madler/zlib/pull/410
The commitid is b25781e735363e04f6c56e21431c47e4afc50b17.
Reproduction: z15 only:
#include <assert.h>
#include <stdlib.h>
#include <zlib.h>
int main() {
Bytef in_buf[128], out_buf[1024];
for (size_t i = 0; i < sizeof(in_buf); i++)
in_buf[i] = rand();
uLongf dest_len = compressBound(sizeof(in_buf));
assert(dest_len <= sizeof(out_buf));
int ret = compress(out_buf, &dest_len,
in_buf, sizeof(in_buf));
assert(ret == Z_OK);
}
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