[PATCH] net: fealnx: fixed possible out of band acces to an array
From: Ilya Krutskih <hidden>
Date: 2025-11-10 13:53:16
Also in:
lkml, stable
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
fixed possible out of band access to an array If the fealnx_init_one() function is called more than MAX_UNITS times or card_idx is less than zero Added a check: 0 <= card_idx < MAX_UNITS Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Ilya Krutskih <redacted> --- drivers/net/ethernet/fealnx.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/fealnx.c b/drivers/net/ethernet/fealnx.c
index 6ac8547ef9b8..c7f2141a01fe 100644
--- a/drivers/net/ethernet/fealnx.c
+++ b/drivers/net/ethernet/fealnx.c@@ -491,8 +491,8 @@ static int fealnx_init_one(struct pci_dev *pdev, card_idx++; sprintf(boardname, "fealnx%d", card_idx); - - option = card_idx < MAX_UNITS ? options[card_idx] : 0; + if (card_idx >= 0) + option = card_idx < MAX_UNITS ? options[card_idx] : 0; i = pci_enable_device(pdev); if (i) return i;
@@ -623,7 +623,7 @@ static int fealnx_init_one(struct pci_dev *pdev, np->default_port = option & 15; } - if (card_idx < MAX_UNITS && full_duplex[card_idx] > 0) + if ((0 <= card_idx && MAX_UNITS > card_idx) && full_duplex[card_idx] > 0) np->mii.full_duplex = full_duplex[card_idx]; if (np->mii.full_duplex) {
--
2.43.0