ubuntu-x-swat team mailing list archive

[Michael Stone <michael@xxxxxxxxxx>]

The segfault occurs because Xephyr's attempt to bgfill its client-facing
root window writes past the end of the window's image data buffer.

The write fails because Xephyr's hostx_screen_init() function is
requesting an image data buffer which is too small.

The image data buffer is too small because the calculation of
bytes_per_line conflicts with the calculation of the screen's bits-per-
pixel.

Finally, Ajax supplied a patch six months ago that, when rebased, fixes
the problem:

  http://patchwork.freedesktop.org/patch/1327/

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https://bugs.launchpad.net/bugs/635523

Title:
  Xephyr crashed with SIGSEGV