i40e: Fix potential invalid access when MAC list is empty

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[ Upstream commit a556f06338 ]

list_first_entry() never returns NULL - if the list is empty, it still
returns a pointer to an invalid object, leading to potential invalid
memory access when dereferenced.

Fix this by using list_first_entry_or_null instead of list_first_entry.

Fixes: e3219ce6a7 ("i40e: Add support for client interface for IWARP driver")
Signed-off-by: Zhen Ni <zhen.ni@easystack.cn>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Zhen Ni 2025-08-27 19:56:31 +08:00 • committed by Greg Kroah-Hartman

parent 0cdf1fd8fc

commit e2a5e74879

1 changed files with 2 additions and 2 deletions

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drivers/net/ethernet/intel/i40e/i40e_client.c

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