ping
> I do a grep for kmem_cache_zalloc and kmem_cache_alloc
> in kernel tree, and find some code do not handle NULL
> return of kmem_cache_zalloc correctly
>
>
> Signed-off-by: Zhouyi Zhou <yizhouzhou@xxxxxxxxx>
> ---
> arch/powerpc/kvm/book3s_32_mmu_host.c | 5 +++++
> drivers/iommu/omap-iommu.c | 3 ++-
> fs/jffs2/malloc.c | 4 ++++
> 3 files changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/kvm/book3s_32_mmu_host.c b/arch/powerpc/kvm/book3s_32_mmu_host.c
> index 3a0abd2..5fac89d 100644
> --- a/arch/powerpc/kvm/book3s_32_mmu_host.c
> +++ b/arch/powerpc/kvm/book3s_32_mmu_host.c
> @@ -243,6 +243,11 @@ next_pteg:
> /* Now tell our Shadow PTE code about the new page */
>
> pte = kvmppc_mmu_hpte_cache_next(vcpu);
> + if (!pte) {
> + kvm_release_pfn_clean(hpaddr >> PAGE_SHIFT);
> + r = -EAGAIN;
> + goto out;
> + }
>
> dprintk_mmu("KVM: %c%c Map 0x%llx: [%lx] 0x%llx (0x%llx) -> %lx\n",
> orig_pte->may_write ? 'w' : '-',
> diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
> index bcd78a7..5155714 100644
> --- a/drivers/iommu/omap-iommu.c
> +++ b/drivers/iommu/omap-iommu.c
> @@ -551,7 +551,8 @@ static u32 *iopte_alloc(struct omap_iommu *obj, u32 *iopgd, u32 da)
> dev_vdbg(obj->dev, "%s: a new pte:%p\n", __func__, iopte);
> } else {
> /* We raced, free the reduniovant table */
> - iopte_free(iopte);
> + if (iopte)
> + iopte_free(iopte);
> }
>
> pte_ready:
> diff --git a/fs/jffs2/malloc.c b/fs/jffs2/malloc.c
> index 4f47aa2..58e2336 100644
> --- a/fs/jffs2/malloc.c
> +++ b/fs/jffs2/malloc.c
> @@ -287,6 +287,8 @@ struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void)
> {
> struct jffs2_xattr_datum *xd;
> xd = kmem_cache_zalloc(xattr_datum_cache, GFP_KERNEL);
> + if (!xd)
> + return NULL;
> dbg_memalloc("%p\n", xd);
>
> xd->class = RAWNODE_CLASS_XATTR_DATUM;
> @@ -305,6 +307,8 @@ struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void)
> {
> struct jffs2_xattr_ref *ref;
> ref = kmem_cache_zalloc(xattr_ref_cache, GFP_KERNEL);
> + if (!ref)
> + return NULL;
> dbg_memalloc("%p\n", ref);
>
> ref->class = RAWNODE_CLASS_XATTR_REF;
> --
> 1.7.10.4
>
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