From: Ashwin Gundarapu <linuxuser509@zohomail.in>
Date: Sat, 23 May 2026 11:49:40 +0530
Subject: [PATCH] e1000e: fix memory leak of msix_entries on MSI-X failure

When MSI-X initialization fails, the driver falls through to try
MSI or legacy interrupts. However, the msix_entries array allocated
earlier is not freed, causing a memory leak. Free it and set to
NULL before falling through to the MSI fallback path.

Found by code inspection.

Signed-off-by: Ashwin Gundarapu <linuxuser509@zohomail.in>
---
 drivers/net/ethernet/intel/e1000e/netdev.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 7ce0cc8ab8f4..1526069d7fc1 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -2065,10 +2065,12 @@ void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
 							    a->num_vectors);
 				if (err > 0)
 					return;
-			}
-			/* MSI-X failed, so fall through and try MSI */
-			e_err("Failed to initialize MSI-X interrupts.  Falling back to MSI interrupts.\n");
-			e1000e_reset_interrupt_capability(adapter);
+                        }
+                        /* MSI-X failed, so fall through and try MSI */
+                        e_err("Failed to initialize MSI-X interrupts.  Falling back to MSI interrupts.\n");
+                        kfree(adapter->msix_entries);
+                        adapter->msix_entries = NULL;
+                        e1000e_reset_interrupt_capability(adapter);
 		}
 		adapter->int_mode = E1000E_INT_MODE_MSI;
 		fallthrough;
--
2.43.0