i40e: Add checking for null for nlmsg_find_attr()

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[ Upstream commit 7fa0b526f8 ]

The result of nlmsg_find_attr() 'br_spec' is dereferenced in
nla_for_each_nested(), but it can take NULL value in nla_find() function,
which will result in an error.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 51616018dd ("i40e: Add support for getlink, setlink ndo ops")
Signed-off-by: Natalia Petrova <n.petrova@fintech.ru>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Link: https://lore.kernel.org/r/20230209172833.3596034-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Natalia Petrova 2023-02-09 09:28:33 -08:00 • committed by Greg Kroah-Hartman

parent 974cfed82c

commit 49f04300d4

1 changed files with 2 additions and 0 deletions

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drivers/net/ethernet/intel/i40e/i40e_main.c

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