net: dsa: microchip: Don't free uninitialized ksz_irq

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commit 25b62cc5b2 upstream.

If something goes wrong at setup, ksz_irq_free() can be called on
uninitialized ksz_irq (for example when ksz_ptp_irq_setup() fails). It
leads to freeing uninitialized IRQ numbers and/or domains.

Use dsa_switch_for_each_user_port_continue_reverse() in the error path
to iterate only over the fully initialized ports.

Cc: stable@vger.kernel.org
Fixes: cc13ab18b2 ("net: dsa: microchip: ptp: enable interrupt for timestamping")
Signed-off-by: Bastien Curutchet (Schneider Electric) <bastien.curutchet@bootlin.com>
Link: https://patch.msgid.link/20251120-ksz-fix-v6-3-891f80ae7f8f@bootlin.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Bastien Curutchet (Schneider Electric) 2025-11-20 10:12:02 +01:00 • committed by Greg Kroah-Hartman

parent 040444baae

commit 9428654c82

1 changed files with 1 additions and 1 deletions

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drivers/net/dsa/microchip/ksz_common.c

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