rt2x00: type bug in _rt2500usb_register_read()

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This code causes a static checker bug.

drivers/net/wireless/ralink/rt2x00/rt2500usb.c:232 _rt2500usb_register_read()
warn: passing casted pointer 'value' to 'rt2500usb_register_read()' 32 vs 16.

If the low 16 bits were initialized to zero then this code would only be
a problem on big endian systems.  But in this case this is case the low
16 bits are never initialized.  This is called from a function which is
created using a macro:

RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);

We end up copying uninitialized data to the user which is bogus and an
information leak.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

...

This commit is contained in:

Dan Carpenter 2015-11-26 14:55:23 +03:00 • committed by Kalle Valo

parent 5536f20a1c

commit 952348a5f8

1 changed files with 4 additions and 1 deletions

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drivers/net/wireless/ralink/rt2x00/rt2500usb.c

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