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bnxt: avoid overflow in bnxt_get_nvram_directory()

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[ Upstream commit 7c6dddc239abe660598c49ec95ea0ed6399a4b2a ]

The value of an arithmetic expression is subject
of possible overflow due to a failure to cast operands to a larger data
type before performing arithmetic. Used macro for multiplication instead
operator for avoiding overflow.

Found by Security Code and Linux Verification
Center (linuxtesting.org) with SVACE.

Signed-off-by: Maxim Korotkov <korotkov.maxim.s@gmail.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Link: https://lore.kernel.org/r/20230309174347.3515-1-korotkov.maxim.s@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Maxim Korotkov
2023-03-09 20:43:47 +03:00
committed by Greg Kroah-Hartman
parent f910374870
commit d5eaf2a6b0
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
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@@ -2709,7 +2709,7 @@ static int bnxt_get_nvram_directory(struct net_device *dev, u32 len, u8 *data)
if (rc)
return rc;
buflen = dir_entries * entry_length;
buflen = mul_u32_u32(dir_entries, entry_length);
buf = hwrm_req_dma_slice(bp, req, buflen, &dma_handle);
if (!buf) {
hwrm_req_drop(bp, req);