Re: [PATCH v1] can: c_can: fix null-ptr-deref on ioctl()

On 06.09.2021 16:37:02, Tong Zhang wrote:

the pdev maybe not a platform device, e.g. c_can_pci device,
in this case, calling to_platform_device() would not make sense.
Also, per the comment in drivers/net/can/c_can/c_can_ethtool.c, @bus_info
sould match dev_name() string, so I am replacing this with dev_name() to

  ^^^^^
  should

Fixed while applying.

fix this issue.

[    1.458583] BUG: unable to handle page fault for address: 0000000100000000
[    1.460921] RIP: 0010:strnlen+0x1a/0x30
[    1.466336]  ? c_can_get_drvinfo+0x65/0xb0 [c_can]
[    1.466597]  ethtool_get_drvinfo+0xae/0x360
[    1.466826]  dev_ethtool+0x10f8/0x2970
[    1.467880]  sock_ioctl+0xef/0x300

Fixes: 2722ac986e93 ("can: c_can: add ethtool support")
Signed-off-by: Tong Zhang <redacted>

Applied to linux-can/testing + added stable on Cc.

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
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