From 11b49d9bb63fab2f92223419a2492661e317e2ef Mon Sep 17 00:00:00 2001 From: Laura Garcia Liebana Date: Thu, 18 Feb 2016 18:38:42 +0100 Subject: [PATCH] staging: netlogic: Return zero pointer after failed kmalloc Return a ZERO_SIZE_PTR in the xlr_config_spill function if the kmalloc returns an invalid value. This change prevents a possible segmentation fault as the invalid pointer is fed into PTR_ALIGN macro. Signed-off-by: Laura Garcia Liebana Signed-off-by: Greg Kroah-Hartman --- drivers/staging/netlogic/xlr_net.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/staging/netlogic/xlr_net.c b/drivers/staging/netlogic/xlr_net.c index 98e74d7..0015847 100644 --- a/drivers/staging/netlogic/xlr_net.c +++ b/drivers/staging/netlogic/xlr_net.c @@ -437,8 +437,10 @@ static void *xlr_config_spill(struct xlr_net_priv *priv, int reg_start_0, base = priv->base_addr; spill_size = size; spill = kmalloc(spill_size + SMP_CACHE_BYTES, GFP_ATOMIC); - if (!spill) + if (!spill) { pr_err("Unable to allocate memory for spill area!\n"); + return ZERO_SIZE_PTR; + } spill = PTR_ALIGN(spill, SMP_CACHE_BYTES); phys_addr = virt_to_phys(spill); -- 2.7.4