ppdev: Add an error check in register_device

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In register_device, the return value of ida_simple_get is unchecked,
in witch ida_simple_get will use an invalid index value.

To address this issue, index should be checked after ida_simple_get. When
the index value is abnormal, a warning message should be printed, the port
should be dropped, and the value should be recorded.

Fixes: 9a69645dde ("ppdev: fix registering same device name")
Signed-off-by: Huai-Yuan Liu <qq810974084@gmail.com>
Link: https://lore.kernel.org/r/20240412083840.234085-1-qq810974084@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Huai-Yuan Liu 2024-04-12 16:38:40 +08:00 • committed by Greg Kroah-Hartman

parent f866b65322

commit fbf740aeb8

1 changed files with 11 additions and 4 deletions

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drivers/char/ppdev.c

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