| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.7 042/141] i40iw: Do not set self-referencing pointer to NULL after kfree | Date | Thu, 6 Oct 2016 10:27:58 +0200 |
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4.7-stable review patch. If anyone has any objections, please let me know.
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From: Mustafa Ismail <mustafa.ismail@intel.com>
commit 7eaf8313b1cfe93417a22bdc3f7380cac2a3dc6d upstream.
In i40iw_free_virt_mem(), do not set mem->va to NULL after freeing it as mem->va is a self-referencing pointer to mem.
Fixes: 4e9042e647ff ("i40iw: add hw and utils files")
Reported-by: Stefan Assmann <sassmann@redhat.com> Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com> Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/infiniband/hw/i40iw/i40iw_utils.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/infiniband/hw/i40iw/i40iw_utils.c +++ b/drivers/infiniband/hw/i40iw/i40iw_utils.c @@ -673,8 +673,11 @@ enum i40iw_status_code i40iw_free_virt_m { if (!mem) return I40IW_ERR_PARAM; + /* + * mem->va points to the parent of mem, so both mem and mem->va + * can not be touched once mem->va is freed + */ kfree(mem->va); - mem->va = NULL; return 0; }
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