Philip Withnall authored Feb 04, 2021 and Simon McVittie committed Mar 19, 2021

Convert all the call sites which use `g_memdup()`’s length argument
trivially (for example, by passing a `sizeof()` or an existing `gsize`
variable), so that they use `g_memdup2()` instead.

In almost all of these cases the use of `g_memdup()` would not have
caused problems, but it will soon be deprecated, so best port away from
it

In particular, this fixes an overflow within `g_bytes_new()`, identified
as GHSL-2021-045 (aka CVE-2021-27219) by GHSL team member Kevin Backhouse.

Adapted for GLib 2.58 by Simon McVittie.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Fixes: CVE-2021-27219
Fixes: GHSL-2021-045
Helps: #2319
(cherry picked from commit 0736b7c1

)
[Backport to 2.58: Omit changes to ghash.c, will be a separate commit]
[Backport to 2.58: Omit changes to giochannel.c, not needed in this branch]
[Backport to 2.58: Omit changes to uri test, not needed in this branch]
Signed-off-by: Simon McVittie <smcv@collabora.com>