kernel/linux.git/tools/testing/selftests/tty, branch v6.19.11

Merge tag 'tty-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2025-12-07T02:38:19+00:00

Pull tty/serial updates from Greg KH: "Here is the big set of tty/serial driver changes for 6.19-rc1. Nothing major at all, just small constant churn to make the tty layer "cleaner" as well as serial driver updates and even a new test added! Included in here are: - More tty/serial cleanups from Jiri - tty tiocsti test added to hopefully ensure we don't regress in this area again - sc16is7xx driver updates - imx serial driver updates - 8250 driver updates - new hardware device ids added - other minor serial/tty driver cleanups and tweaks All of these have been in linux-next for a while with no reported issues" * tag 'tty-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (60 commits) serial: sh-sci: Fix deadlock during RSCI FIFO overrun error dt-bindings: serial: rsci: Drop "uart-has-rtscts: false" LoongArch: dts: Add uart new compatible string serial: 8250: Add Loongson uart driver support dt-bindings: serial: 8250: Add Loongson uart compatible serial: 8250: add driver for KEBA UART serial: Keep rs485 settings for devices without firmware node serial: qcom-geni: Enable Serial on SA8255p Qualcomm platforms serial: qcom-geni: Enable PM runtime for serial driver serial: sprd: Return -EPROBE_DEFER when uart clock is not ready tty: serial: samsung: Declare earlycon for Exynos850 serial: icom: Convert PCIBIOS_* return codes to errnos serial: 8250-of: Fix style issues in 8250_of.c serial: add support of CPCI cards serial: mux: Fix kernel doc for mux_poll() tty: replace use of system_unbound_wq with system_dfl_wq serial: 8250_platform: simplify IRQF_SHARED handling serial: 8250: make share_irqs local to 8250_platform serial: 8250: move skip_txen_test to core serial: drop SERIAL_8250_DEPRECATED_OPTIONS ...

selftests: complete kselftest include centralization

2025-11-27T22:24:31+00:00

This follow-up patch completes centralization of kselftest.h and ksefltest_harness.h includes in remaining seltests files, replacing all relative paths with a non-relative paths using shared -I include path in lib.mk Tested with gcc-13.3 and clang-18.1, and cross-compiled successfully on riscv, arm64, x86_64 and powerpc arch. [reddybalavignesh9979@gmail.com: add selftests include path for kselftest.h] Link: https://lkml.kernel.org/r/20251017090201.317521-1-reddybalavignesh9979@gmail.com Link: https://lkml.kernel.org/r/20251016104409.68985-1-reddybalavignesh9979@gmail.com Signed-off-by: Bala-Vignesh-Reddy Suggested-by: Andrew Morton Link: https://lore.kernel.org/lkml/20250820143954.33d95635e504e94df01930d0@linux-foundation.org/ Reviewed-by: Wei Yang Cc: David Hildenbrand Cc: David S. Miller Cc: Eric Dumazet Cc: Günther Noack Cc: Jakub Kacinski Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mickael Salaun Cc: Ming Lei Cc: Paolo Abeni Cc: Shuah Khan Cc: Simon Horman Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton

selftests: tty: add tty_tiocsti_test to .gitignore

2025-10-28T14:24:43+00:00

Building the tty selftests generates the tty_tiocsti_test binary, which appears as untracked file in git. As mentioned in the kselftest documentation, all the generated objects must be placed inside .gitignore. This prevents the generated objects from accidentally getting staged and keeps the working tree clean. Add the tty_tiocsti_test binary to .gitignore to avoid accidentally staging the build artifact and maintain a clean working tree. Link: https://docs.kernel.org/dev-tools/kselftest.html#contributing-new-tests-details Fixes: 7553f5173ec3 ("selftests/tty: add TIOCSTI test suite") Suggested-by: Greg KH Suggested-by: David Hunter Signed-off-by: Gopi Krishna Menon Link: https://patch.msgid.link/20251026100104.3354-1-krishnagopi487@gmail.com Signed-off-by: Greg Kroah-Hartman

selftests/tty: add TIOCSTI test suite

2025-10-22T10:09:07+00:00

TIOCSTI is a TTY ioctl command that allows inserting characters into the terminal input queue, making it appear as if the user typed those characters. This functionality has behavior that varies based on system configuration and process credentials. The dev.tty.legacy_tiocsti sysctl introduced in commit 83efeeeb3d04 ("tty: Allow TIOCSTI to be disabled") controls TIOCSTI usage. When disabled, TIOCSTI requires CAP_SYS_ADMIN capability. The current implementation checks the current process's credentials via capable(CAP_SYS_ADMIN), but does not validate against the file opener's credentials stored in file->f_cred. This creates different behavior when file descriptors are passed between processes via SCM_RIGHTS. Add a test suite with 16 test variants using fixture variants to verify TIOCSTI behavior when dev.tty.legacy_tiocsti is enabled/disabled: - Basic TIOCSTI tests (8 variants): Direct testing with different capability and controlling terminal combinations - FD passing tests (8 variants): Test behavior when file descriptors are passed between processes with different capabilities The FD passing tests document this behavior - some tests show different results than expected based on file opener credentials, demonstrating that TIOCSTI uses current process credentials rather than file opener credentials. The tests validate proper enforcement of the legacy_tiocsti sysctl. Test implementation uses openpty(3) with TIOCSCTTY for isolated PTY environments. See tty_ioctl(4) for details on TIOCSTI behavior and security requirements. Signed-off-by: Abhinav Saxena Link: https://patch.msgid.link/20250903-toicsti-bug-v4-1-4894b6649ef8@gmail.com Signed-off-by: Greg Kroah-Hartman

kselftest/tty: Report a consistent test name for the one test we run

2024-05-06T19:57:19+00:00

Currently the tty_tstamp_update test reports a different exit message for every path it can exit via. This can be confusing for automated systems as the string that gets logged is interpreted as a test name so if the test status changes they can't tell that it's the same test case that was run, they can see that the overall status of the test program is a failure but it's not clear that it was running the same test. Change all the messages that are logged to be diagnostic prints and log the name of the program as the test name. Signed-off-by: Mark Brown Signed-off-by: Shuah Khan

selftests: tty: add selftest for tty timestamp updates

2023-06-15T11:45:42+00:00

Add new test case which checks that timestamp updates on actual terminal character device (e.g. /dev/pts/0) happen even if the terminal is accessed via magic /dev/tty file. Signed-off-by: Michal Sekletar Message-ID: <20230613172107.78138-2-msekleta@redhat.com> Signed-off-by: Greg Kroah-Hartman