uio: potential double frees if __uio_register_device() fails

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commit f019f07ecf upstream.

The uio_unregister_device() function assumes that if "info->uio_dev" is
non-NULL that means "info" is fully allocated.  Setting info->uio_de
has to be the last thing in the function.

In the current code, if request_threaded_irq() fails then we return with
info->uio_dev set to non-NULL but info is not fully allocated and it can
lead to double frees.

Fixes: beafc54c4e ("UIO: Add the User IO core code")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Dan Carpenter 2018-08-02 11:24:47 +03:00 • committed by Ben Hutchings

parent 8c475c52f5

commit 618a41aecf

1 changed files with 1 additions and 2 deletions

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drivers/uio/uio.c

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