6.12-stable review patch. If anyone has any objections, please let me know.
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From: Bastien Curutchet (Schneider Electric) bastien.curutchet@bootlin.com
commit 25b62cc5b22c45face094ae3e8717258e46d1d19 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: cc13ab18b201 ("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 --- drivers/net/dsa/microchip/ksz_common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -2592,7 +2592,7 @@ out_ptpirq: ksz_ptp_irq_free(ds, dp->index); out_pirq: if (dev->irq > 0) - dsa_switch_for_each_user_port(dp, dev->ds) + dsa_switch_for_each_user_port_continue_reverse(dp, dev->ds) ksz_irq_free(&dev->ports[dp->index].pirq); out_girq: if (dev->irq > 0)