From 6e3cd5fa65318f35ec9c9f61bc5cdb55d4783cb9 Mon Sep 17 00:00:00 2001 From: Venkat Duvvuru Date: Fri, 18 Dec 2015 01:40:50 +0530 Subject: [PATCH] be2net: Avoid accessing eq object in be_msix_register routine, when i < 0. When the first request_irq fails in be_msix_register, i value would be zero. The current code decrements the i value and accesses the eq object without validating the decremented "i" value. This can cause an "invalid memory address access" violation. This patch fixes the problem by accessing the eq object after validating the "i" value. Signed-off-by: Venkat Duvvuru Signed-off-by: David S. Miller --- drivers/net/ethernet/emulex/benet/be_main.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c index b6ad029..6598820 100644 --- a/drivers/net/ethernet/emulex/benet/be_main.c +++ b/drivers/net/ethernet/emulex/benet/be_main.c @@ -3299,8 +3299,10 @@ static int be_msix_register(struct be_adapter *adapter) return 0; err_msix: - for (i--, eqo = &adapter->eq_obj[i]; i >= 0; i--, eqo--) + for (i--; i >= 0; i--) { + eqo = &adapter->eq_obj[i]; free_irq(be_msix_vec_get(adapter, eqo), eqo); + } dev_warn(&adapter->pdev->dev, "MSIX Request IRQ failed - err %d\n", status); be_msix_disable(adapter); -- 2.7.4