Function xlp_init_node_msi_irqs() defined in arch/mips/pci/msi-xlp.c calls kzalloc() to allocate memory for struct xlp_msi_data which is dereferenced immediately. As kzalloc() may return NULL on failure, this code piece may cause NULL pointer dereference bug. --- arch/mips/pci/msi-xlp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/mips/pci/msi-xlp.c b/arch/mips/pci/msi-xlp.c index bb14335..c03bce1 100644 --- a/arch/mips/pci/msi-xlp.c +++ b/arch/mips/pci/msi-xlp.c @@ -474,6 +474,8 @@ void __init xlp_init_node_msi_irqs(int node, int link) /* Alloc an MSI block for the link */ md = kzalloc(sizeof(*md), GFP_KERNEL); + if (!md) + return; spin_lock_init(&md->msi_lock); md->msi_enabled_mask = 0; md->msi_alloc_mask = 0; -- 2.6.4
