[PATCH v2] net: fealnx: fix possible 'card_idx' integer overflow in
From: Ilya Krutskih <hidden>
Date: 2025-12-11 17:30:59
Also in:
lkml, stable
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
'card_idx' can be overflowed when fealnx_init_one() will be called more than
INT_MAX times. Check before incremention is required.
Fixes: 15c037d6423e ("fealnx: Move the Myson driver")
Cc: stable@vger.kernel.org # v5.10+
Signed-off-by: Ilya Krutskih <redacted>
---
drivers/net/ethernet/fealnx.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/fealnx.c b/drivers/net/ethernet/fealnx.c
index 6ac8547ef9b8..7eb6e42b4551 100644
--- a/drivers/net/ethernet/fealnx.c
+++ b/drivers/net/ethernet/fealnx.c@@ -489,7 +489,10 @@ static int fealnx_init_one(struct pci_dev *pdev, int bar = 1; #endif - card_idx++; + if (card_idx == INT_MAX) + return -EINVAL; + else + card_idx++; sprintf(boardname, "fealnx%d", card_idx); option = card_idx < MAX_UNITS ? options[card_idx] : 0;
--
2.43.0