From: Kyle Meyer <kyle.meyer@hpe•com>
To: michael.chan@broadcom•com, pavan.chebbi@broadcom•com,
andrew+netdev@lunn•ch, davem@davemloft•net, edumazet@google•com,
kuba@kernel•org, pabeni@redhat•com
Cc: netdev@vger•kernel.org, linux-kernel@vger•kernel.org
Subject: [PATCH] bnxt_en: Fix NULL pointer dereference
Date: Fri, 5 Jun 2026 17:25:24 -0500 [thread overview]
Message-ID: <aiNM1CY2-StPilxW@hpe.com> (raw)
PCIe errors detected by a Root Port or Downstream Port cause error
recovery services to run on all subordinate devices regardless of
administrative state.
The .error_detected() callback, bnxt_io_error_detected(), disables
and synchronizes IRQs via bnxt_disable_int_sync(), which calls
bnxt_cp_num_to_irq_num() to map completion rings to IRQs using
bp->bnapi.
Since bp->bnapi is allocated on NIC open and freed on NIC close, PCIe
error recovery on a closed NIC can dereference a NULL pointer.
Check if bp->bnapi is NULL before disabling and synchronizing IRQs.
Fixes: e5811b8c09df ("bnxt_en: Add IRQ remapping logic.")
Cc: stable@vger•kernel.org
Signed-off-by: Kyle Meyer <kyle.meyer@hpe•com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 008c34cff7b4..ec38a0a40875 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -5748,7 +5748,7 @@ static void bnxt_disable_int_sync(struct bnxt *bp)
{
int i;
- if (!bp->irq_tbl)
+ if (!bp->irq_tbl || !bp->bnapi)
return;
atomic_inc(&bp->intr_sem);
--
2.51.0
reply other threads:[~2026-06-05 22:25 UTC|newest]
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