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Open Source and information security mailing list archives
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Date: Fri, 17 Jun 2022 19:42:15 +0200 From: Andrew Lunn <andrew@...n.ch> To: Oleksij Rempel <o.rempel@...gutronix.de> Cc: Heiner Kallweit <hkallweit1@...il.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, kernel@...gutronix.de, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: [PATCH net-next v2 1/1] net: phy: at803x: fix NULL pointer dereference on AR9331 PHY On Fri, Jun 17, 2022 at 06:59:43AM +0200, Oleksij Rempel wrote: > Latest kernel will explode on the PHY interrupt config, since it depends > now on allocated priv. So, run probe to allocate priv to fix it. > > ar9331_switch ethernet.1:10 lan0 (uninitialized): PHY [!ahb!ethernet@...00000!mdio!switch@10:00] driver [Qualcomm Atheros AR9331 built-in PHY] (irq=13) > CPU 0 Unable to handle kernel paging request at virtual address 0000000a, epc == 8050e8a8, ra == 80504b34 > ... > Call Trace: > [<8050e8a8>] at803x_config_intr+0x5c/0xd0 > [<80504b34>] phy_request_interrupt+0xa8/0xd0 > [<8050289c>] phylink_bringup_phy+0x2d8/0x3ac > [<80502b68>] phylink_fwnode_phy_connect+0x118/0x130 > [<8074d8ec>] dsa_slave_create+0x270/0x420 > [<80743b04>] dsa_port_setup+0x12c/0x148 > [<8074580c>] dsa_register_switch+0xaf0/0xcc0 > [<80511344>] ar9331_sw_probe+0x370/0x388 > [<8050cb78>] mdio_probe+0x44/0x70 > [<804df300>] really_probe+0x200/0x424 > [<804df7b4>] __driver_probe_device+0x290/0x298 > [<804df810>] driver_probe_device+0x54/0xe4 > [<804dfd50>] __device_attach_driver+0xe4/0x130 > [<804dcb00>] bus_for_each_drv+0xb4/0xd8 > [<804dfac4>] __device_attach+0x104/0x1a4 > [<804ddd24>] bus_probe_device+0x48/0xc4 > [<804deb44>] deferred_probe_work_func+0xf0/0x10c > [<800a0ffc>] process_one_work+0x314/0x4d4 > [<800a17fc>] worker_thread+0x2a4/0x354 > [<800a9a54>] kthread+0x134/0x13c > [<8006306c>] ret_from_kernel_thread+0x14/0x1c > > Same Issue would affect some other PHYs (QCA8081, QCA9561), so fix it > too. > > Fixes: 3265f4218878 ("net: phy: at803x: add fiber support") > Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de> Reviewed-by: Andrew Lunn <andrew@...n.ch> Andrew
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