[ruby-core:107664] [Ruby master Bug#10961] Zlib corrupts data when receive signal

Issue #10961 has been updated by nagachika (Tomoyuki Chikanaga).

Backport changed from 2.6: REQUIRED, 2.7: DONE, 3.0: REQUIRED to 2.6: REQUIRED, 2.7: DONE, 3.0: DONE

ruby_3_0 5c15cecfbfe61f9d46f45c949829c79cb7f162a9 merged revision(s) 0c5f8c62766afe4605172800063e63fe36996658.

----------------------------------------
Bug #10961: Zlib corrupts data when receive signal
https://bugs.ruby-lang.org/issues/10961#change-96579

* Author: leiting (Lei Ting)
* Status: Closed
* Priority: Normal
* ruby -v: 2.0.0-p353 2.2.0
* Backport: 2.6: REQUIRED, 2.7: DONE, 3.0: DONE
----------------------------------------
When receiving signal on main thread, Zlib::Deflate.deflate will be interrupted in zstream_run_func (zlib.c), thus producing unfinished output buffer.

Zlib::Deflate.deflate will return normally, without error, but the return value will be corrupted buffer and can't be decompressed.

Preferred fix: zstream_run() should check if err is Z_STREAM_END, if not, raise an error instead of return normally.

---

run zlib.rb to reproduce this problem:

# ruby zlib.rb
37028
generating len=1000000000 string...
string length=1000000000
compressing...
^CINT (press Ctrl+C or send a signal to the pid)
zlib.rb:13:in `deflate': data error (Zlib::DataError)
        from zlib.rb:13:in `test_string'
        from zlib.rb:25:in `block in <main>'
        from zlib.rb:25:in `each'
        from zlib.rb:25:in `<main>'

---Files--------------------------------
zlib.rb (646 Bytes)
bug10961.rb (312 Bytes)


-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:[e-mail]?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>