net: nixge: Fix error path for obtaining mac address

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Fix issue where nixge_get_nvmem_address() returns a non-NULL
return value on a failed nvmem_cell_get() that causes an invalid
access when error value encoded in pointer is dereferenced.

Furthermore ensure that buffer allocated by nvmem_cell_read()
actually gets kfreed() if the function succeeds.

Fixes commit 492caffa8a ("net: ethernet: nixge: Add support for
National Instruments XGE netdev")
Reported-by: Alex Williams <alex.williams@ni.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Moritz Fischer 2018-05-04 10:18:33 -07:00 • committed by David S. Miller

parent 1751eb42dd

commit abcd3d6fc6

1 changed files with 5 additions and 3 deletions

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8

drivers/net/ethernet/ni/nixge.c

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