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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 <nevola@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Laura Garcia Liebana 2016-02-18 18:38:42 +01:00 committed by Greg Kroah-Hartman
parent bf8b2bb6d8
commit 11b49d9bb6
1 changed files with 3 additions and 1 deletions
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4
drivers/staging/netlogic/xlr_net.c
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@ -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);