linux

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Thomas Weißschuh fdc1e72487 ptp: Ensure info->enable callback is always set

commit fd53aa40e6 upstream.

The ioctl and sysfs handlers unconditionally call the ->enable callback.
Not all drivers implement that callback, leading to NULL dereferences.
Example of affected drivers: ptp_s390.c, ptp_vclock.c and ptp_mock.c.

Instead use a dummy callback if no better was specified by the driver.

Fixes: d94ba80ebb ("ptp: Added a brand new class driver for ptp clocks.")
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Link: https://patch.msgid.link/20250123-ptp-enable-v1-1-b015834d3a47@weissschuh.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2025-03-13 12:43:11 +01:00

Kconfig

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Makefile

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ptp_chardev.c

ptp: Fix error message on failed pin verification

2024-07-05 09:08:11 +02:00

ptp_clock.c

ptp: Ensure info->enable callback is always set

2025-03-13 12:43:11 +01:00

ptp_dte.c