[ Upstream commit a8627176b0de7ba3f4524f641ddff4abf23ae4e4 ]
In the error handling code of iwl_req_fw_callback(), iwl_dealloc_ucode() is called to free data. In iwl_drv_stop(), iwl_dealloc_ucode() is called again, which can cause double-free problems.
To fix this bug, the call to iwl_dealloc_ucode() in iwl_req_fw_callback() is deleted.
This bug is found by a runtime fuzzing tool named FIZZER written by us.
Signed-off-by: Jia-Ju Bai baijiaju1990@gmail.com Signed-off-by: Luca Coelho luciano.coelho@intel.com Signed-off-by: Kalle Valo kvalo@codeaurora.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/intel/iwlwifi/iwl-drv.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c index 99676d6c4713..6c10b8c4ddbe 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c +++ b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c @@ -1509,7 +1509,6 @@ static void iwl_req_fw_callback(const struct firmware *ucode_raw, void *context) goto free;
out_free_fw: - iwl_dealloc_ucode(drv); release_firmware(ucode_raw); out_unbind: complete(&drv->request_firmware_complete);