net: ftgmac100: fix potential NULL pointer access in ftgmac100_phy_disconnect

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commit e88fbc30dd upstream.

After the call to phy_disconnect() netdev->phydev is reset to NULL.
So fixed_phy_unregister() would be called with a NULL pointer as argument.
Therefore cache the phy_device before this call.

Fixes: e24a6c8746 ("net: ftgmac100: Get link speed and duplex for NC-SI")
Cc: stable@vger.kernel.org
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Dawid Osuchowski <dawid.osuchowski@linux.intel.com>
Link: https://patch.msgid.link/2b80a77a-06db-4dd7-85dc-3a8e0de55a1d@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Heiner Kallweit 2025-07-30 22:23:23 +02:00 • committed by Greg Kroah-Hartman

parent e6269d9878

commit ae59ec969c

1 changed files with 4 additions and 3 deletions

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drivers/net/ethernet/faraday/ftgmac100.c

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