| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.15 102/177] sfc_ef100: potential dereference of null pointer | Date | Mon, 20 Dec 2021 15:34:12 +0100 |
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From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
[ Upstream commit 407ecd1bd726f240123f704620d46e285ff30dd9 ]
The return value of kmalloc() needs to be checked. To avoid use in efx_nic_update_stats() in case of the failure of alloc.
Fixes: b593b6f1b492 ("sfc_ef100: statistics gathering") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/net/ethernet/sfc/ef100_nic.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/sfc/ef100_nic.c b/drivers/net/ethernet/sfc/ef100_nic.c index 518268ce20644..d35cafd422b1c 100644 --- a/drivers/net/ethernet/sfc/ef100_nic.c +++ b/drivers/net/ethernet/sfc/ef100_nic.c @@ -609,6 +609,9 @@ static size_t ef100_update_stats(struct efx_nic *efx, ef100_common_stat_mask(mask); ef100_ethtool_stat_mask(mask); + if (!mc_stats) + return 0; + efx_nic_copy_stats(efx, mc_stats); efx_nic_update_stats(ef100_stat_desc, EF100_STAT_COUNT, mask, stats, mc_stats, false); -- 2.33.0
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