Merge patch series "selftests: coredump: Some bug fixes"

Nam Cao <namcao@linutronix.de> says:

While trying the coredump test on qemu-system-riscv64, I observed test
failures for various reasons.

This series makes the test works on qemu-system-riscv64.

* patches from https://lore.kernel.org/cover.1744383419.git.namcao@linutronix.de:
  selftests: coredump: Raise timeout to 2 minutes
  selftests: coredump: Fix test failure for slow machines
  selftests: coredump: Properly initialize pointer

Link: https://lore.kernel.org/cover.1744383419.git.namcao@linutronix.de
Signed-off-by: Christian Brauner <brauner@kernel.org>