wifi: iwlwifi: fix potential use after free in iwl_mld_remove_link()

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[ Upstream commit 77e67d5daa ]

This code frees "link" by calling kfree_rcu(link, rcu_head) and then it
dereferences "link" to get the "link->fw_id".  Save the "link->fw_id"
first to avoid a potential use after free.

Fixes: d1e879ec60 ("wifi: iwlwifi: add iwlmld sub-driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://patch.msgid.link/aNKCcKlbSkkS4_gO@stanley.mountain
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Dan Carpenter 2025-09-23 14:20:16 +03:00 • committed by Greg Kroah-Hartman

parent cba094c188

commit 5b4a239c9f

1 changed files with 3 additions and 2 deletions

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drivers/net/wireless/intel/iwlwifi/mld/link.c

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