From: Xiaoke Wang xkernel.wang@foxmail.com
commit b352c3465bb808ab700d03f5bac2f7a6f37c5350 upstream.
devm_kmalloc() returns a pointer to allocated memory on success, NULL on failure. While lp->indirect_lock is allocated by devm_kmalloc() without proper check. It is better to check the value of it to prevent potential wrong memory access.
Fixes: f14f5c11f051 ("net: ll_temac: Support indirect_mutex share within TEMAC IP") Signed-off-by: Xiaoke Wang xkernel.wang@foxmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/xilinx/ll_temac_main.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/net/ethernet/xilinx/ll_temac_main.c +++ b/drivers/net/ethernet/xilinx/ll_temac_main.c @@ -1345,6 +1345,8 @@ static int temac_probe(struct platform_d lp->indirect_lock = devm_kmalloc(&pdev->dev, sizeof(*lp->indirect_lock), GFP_KERNEL); + if (!lp->indirect_lock) + return -ENOMEM; spin_lock_init(lp->indirect_lock); }