1. 01 Nov, 2016 1 commit
  2. 31 Oct, 2016 28 commits
  3. 30 Oct, 2016 10 commits
  4. 29 Oct, 2016 1 commit
    • Joe Tsai's avatar
      compress/gzip: only encode MTIME if it is valid · b4e714e5
      Joe Tsai authored
      The GZIP format records the ModTime as an uint32 counting seconds since
      the Unix epoch. The zero value is explicitly defined in section 2.3.1
      as meaning no timestamp is available.
      
      Currently, the Writer always encodes the ModTime even if it is the zero
      time.Time value, which causes the Writer to try and encode the value
      -62135596800 into the uint32 MTIME field. This causes an overflow and
      results in our GZIP files having MTIME fields indicating a date in 2042-07-13.
      
      We alter the Writer to only encode ModTime if the value does not underflow
      the MTIME field (i.e., it is newer than the Unix epoch). We do not attempt
      to fix what happens when the timestamp overflows in the year 2106.
      
      We alter the Reader to only decode ModTime if the value is non-zero.
      There is no risk of overflowing time.Time when decoding.
      
      Fixes #17663
      
      Change-Id: Ie1b65770c6342cd7b14aeebe10e5a49e6c9eb730
      Reviewed-on: https://go-review.googlesource.com/32325Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
      TryBot-Result: Gobot Gobot <gobot@golang.org>
      b4e714e5