Thomas Weißschuh 81846070cb ptp: Ensure info->enable callback is always set ...

commit fd53aa40e65f518453115b6f56183b0c201db26b 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>

2025-02-17 09:40:41 +01:00

..

Kconfig

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Makefile

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ptp_chardev.c

ptp: Properly handle compat ioctls

2025-02-08 09:52:30 +01:00

ptp_clock.c

ptp: Ensure info->enable callback is always set

2025-02-17 09:40:41 +01:00

ptp_clockmatrix.c

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ptp_clockmatrix.h

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ptp_dfl_tod.c

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ptp_dte.c

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ptp_idt82p33.c

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ptp_idt82p33.h

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ptp_ines.c

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ptp_kvm_arm.c

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ptp_kvm_common.c

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ptp_kvm_x86.c

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ptp_mock.c

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ptp_ocp.c

pps: Fix a use-after-free

2025-02-08 09:52:38 +01:00

ptp_pch.c

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ptp_private.h

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ptp_qoriq_debugfs.c

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ptp_qoriq.c

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ptp_sysfs.c

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ptp_vclock.c

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ptp_vmw.c

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