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[ Upstream commit 9e96652756ad647b7bcc03cb99ffc9756d7b5f93 ] Function dev_alloc_skb() will return a NULL pointer if there is no enough memory. However, in function WILC_WFI_mon_xmit(), its return value is used without validation. This may result in a bad memory access bug. This patch fixes the bug. Signed-off-by: Pan Bian <bianpan2016@163.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>