Am Di., 28. Okt. 2025 um 09:47 Uhr schrieb Christian Brauner
<brauner@kernel.org>:
>
> If we crash multiple processes at the same time we may run out of space.
> Just ignore those errors. They're not actually all that relevant for the
> test.
>
> Signed-off-by: Christian Brauner <brauner@kernel.org>
Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
> ---
> tools/testing/selftests/coredump/coredump_socket_protocol_test.c | 4 ++++
> tools/testing/selftests/coredump/coredump_socket_test.c | 5 +++--
> tools/testing/selftests/coredump/coredump_test_helpers.c | 2 ++
> 3 files changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/coredump/coredump_socket_protocol_test.c b/tools/testing/selftests/coredump/coredump_socket_protocol_test.c
> index 566545e96d7f..d19b6717c53e 100644
> --- a/tools/testing/selftests/coredump/coredump_socket_protocol_test.c
> +++ b/tools/testing/selftests/coredump/coredump_socket_protocol_test.c
> @@ -184,6 +184,8 @@ TEST_F(coredump, socket_request_kernel)
>
> bytes_write = write(fd_core_file, buffer, bytes_read);
> if (bytes_read != bytes_write) {
> + if (bytes_write < 0 && errno == ENOSPC)
> + continue;
> fprintf(stderr, "socket_request_kernel: write to core file failed (read=%zd, write=%zd): %m\n",
> bytes_read, bytes_write);
> goto out;
> @@ -1366,6 +1368,8 @@ TEST_F_TIMEOUT(coredump, socket_multiple_crashing_coredumps, 500)
>
> bytes_write = write(fd_core_file, buffer, bytes_read);
> if (bytes_read != bytes_write) {
> + if (bytes_write < 0 && errno == ENOSPC)
> + continue;
> fprintf(stderr, "write failed for fd %d: %m\n", fd_core_file);
> goto out;
> }
> diff --git a/tools/testing/selftests/coredump/coredump_socket_test.c b/tools/testing/selftests/coredump/coredump_socket_test.c
> index 0a37d0456672..da558a0e37aa 100644
> --- a/tools/testing/selftests/coredump/coredump_socket_test.c
> +++ b/tools/testing/selftests/coredump/coredump_socket_test.c
> @@ -158,8 +158,9 @@ TEST_F(coredump, socket)
>
> bytes_write = write(fd_core_file, buffer, bytes_read);
> if (bytes_read != bytes_write) {
> - fprintf(stderr, "socket test: write to core file failed (read=%zd, write=%zd): %m\n",
> - bytes_read, bytes_write);
> + if (bytes_write < 0 && errno == ENOSPC)
> + continue;
> + fprintf(stderr, "socket test: write to core file failed (read=%zd, write=%zd): %m\n", bytes_read, bytes_write);
> goto out;
> }
> }
> diff --git a/tools/testing/selftests/coredump/coredump_test_helpers.c b/tools/testing/selftests/coredump/coredump_test_helpers.c
> index 65deb3cfbe1b..a6f6d5f2ae07 100644
> --- a/tools/testing/selftests/coredump/coredump_test_helpers.c
> +++ b/tools/testing/selftests/coredump/coredump_test_helpers.c
> @@ -357,6 +357,8 @@ void process_coredump_worker(int fd_coredump, int fd_peer_pidfd, int fd_core_fil
> goto done;
> ssize_t bytes_write = write(fd_core_file, buffer, bytes_read);
> if (bytes_write != bytes_read) {
> + if (bytes_write < 0 && errno == ENOSPC)
> + continue;
> fprintf(stderr, "Worker: write() failed (read=%zd, write=%zd): %m\n",
> bytes_read, bytes_write);
> goto out;
>
> --
> 2.47.3
>