Thread (2 messages) 2 messages, 2 authors, 2021-07-23
STALE1778d

[PATCH] iwlwifi: Fix memory leak on reduce_power_data buffer

From: Colin King <hidden>
Date: 2021-07-23 14:12:06
Also in: kernel-janitors, linux-wireless, lkml
Subsystem: intel wireless wifi link (iwlwifi), the rest · Maintainers: Miri Korenblit, Linus Torvalds

From: Colin Ian King <redacted>

In the error case where the TLV length is invalid the allocated
reduce_power_data buffer pointer is set to ERR_PTR(-EINVAL) without
first kfree'ing any previous allocated memory. Fix this memory
leak by kfree'ing it before taking the error return path.

Addresses-Coverity: ("Resource leak")
Fixes: 9dad325f9d57 ("iwlwifi: support loading the reduced power table from UEFI")
Signed-off-by: Colin Ian King <redacted>
---
 drivers/net/wireless/intel/iwlwifi/fw/uefi.c | 1 +
 1 file changed, 1 insertion(+)
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
index a7c79d814aa4..413bfb2ae54d 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
@@ -86,6 +86,7 @@ static void *iwl_uefi_reduce_power_section(struct iwl_trans *trans,
 		if (len < tlv_len) {
 			IWL_ERR(trans, "invalid TLV len: %zd/%u\n",
 				len, tlv_len);
+			kfree(reduce_power_data);
 			reduce_power_data = ERR_PTR(-EINVAL);
 			goto out;
 		}
-- 
2.31.1
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