Hey,
The recent changes to rework coredump handling to rely on unix sockets
are in the process of being used in systemd. Yu reported on shortcoming
nameling that the signal causing the coredump was available before the
crashing process was reaped.
The previous systemd coredump container interface requires the coredump
file descriptor, and basic information including the signal number to be
sent to the container. This means we need to have the signal number
available before sending the coredump to the container.
In general, the extension makes sense and fits with the rest of the
coredump information.
In addition to this extension this fixes a bunch of the tests that were
failing and reworks the publication mechanism for exit and coredump info
retrievable via the pidfd ioctl.
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
Christian Brauner (22):
pidfs: use guard() for task_lock
pidfs: fix PIDFD_INFO_COREDUMP handling
pidfs: add missing PIDFD_INFO_SIZE_VER1
pidfs: add missing BUILD_BUG_ON() assert on struct pidfd_info
pidfd: add a new supported_mask field
pidfs: prepare to drop exit_info pointer
pidfs: drop struct pidfs_exit_info
pidfs: expose coredump signal
selftests/pidfd: update pidfd header
selftests/pidfd: add first supported_mask test
selftests/pidfd: add second supported_mask test
selftests/coredump: split out common helpers
selftests/coredump: split out coredump socket tests
selftests/coredump: fix userspace client detection
selftests/coredump: fix userspace coredump client detection
selftests/coredump: handle edge-triggered epoll correctly
selftests/coredump: add debug logging to test helpers
selftests/coredump: add debug logging to coredump socket tests
selftests/coredump: add debug logging to coredump socket protocol tests
selftests/coredump: ignore ENOSPC errors
selftests/coredump: add first PIDFD_INFO_COREDUMP_SIGNAL test
selftests/coredump: add second PIDFD_INFO_COREDUMP_SIGNAL test
fs/pidfs.c | 89 +-
include/uapi/linux/pidfd.h | 11 +-
tools/testing/selftests/coredump/.gitignore | 4 +
tools/testing/selftests/coredump/Makefile | 8 +-
.../coredump/coredump_socket_protocol_test.c | 1568 ++++++++++++++++++
.../selftests/coredump/coredump_socket_test.c | 742 +++++++++
tools/testing/selftests/coredump/coredump_test.h | 59 +
.../selftests/coredump/coredump_test_helpers.c | 383 +++++
tools/testing/selftests/coredump/stackdump_test.c | 1662 +-------------------
tools/testing/selftests/pidfd/pidfd.h | 15 +-
tools/testing/selftests/pidfd/pidfd_info_test.c | 73 +
11 files changed, 2914 insertions(+), 1700 deletions(-)
---
base-commit: a779e27f24aeb679969ddd1fdd7f636e22ddbc1e
change-id: 20251026-work-coredump-signal-a72203cdf6eb