Backport #8467: Rewinding and iterating through gzipped IO leads to segmentation fault

• Status: Closed
• Assignee: nagachika (Tomoyuki Chikanaga)

[vicente.mundim (Vicente Mundim)]

The following steps reproduce the bug in 2.0.0:

• Create a file and gzip it in a terminal:

  echo "some content" > compressed_file && gzip compressed_file

Then start a IRB session with the following code:

require 'zlib'
filename = "compressed_file.gz"
io = Zlib::GzipReader.new(open(filename, 'rb'))
io.rewind
io.each {} # segmentation_fault in Ruby 2.0.0

This works in Ruby 1.9.3, 1.9.2, and 1.8.7.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r41014.
Vicente, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

zlib.c: check EOF

• ext/zlib/zlib.c (gzfile_read, gzfile_read_all, gzfile_getc),
  (gzreader_gets): check EOF. [ruby-core:55220] [Bug #8467]

[nobu (Nobuyoshi Nakada)]

• Backport changed from 1.9.3: UNKNOWN, 2.0.0: UNKNOWN to 2.0.0: REQUIRED

[nagachika (Tomoyuki Chikanaga)]

• Tracker changed from Bug to Backport
• Project changed from Ruby master to Backport200
• Category deleted (lib)
• Status changed from Closed to Assigned
• Assignee set to nagachika (Tomoyuki Chikanaga)

[nagachika (Tomoyuki Chikanaga)]

• Status changed from Assigned to Closed

This issue was solved with changeset r41073.
Vicente, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

merge revision(s) 41014: [Backport #8467]

* ext/zlib/zlib.c (gzfile_read, gzfile_read_all, gzfile_getc),
  (gzreader_gets): check EOF.  [ruby-core:55220] [Bug #8467]

* ext/zlib/zlib.c (gzfile_read, gzfile_read_all, gzfile_getc),
  (gzreader_gets): check EOF.  [ruby-core:55220] [Bug #8467]

* lib/cgi/util.rb: All class methods moduleized.