In _emif_get_id(), of_get_address() may return NULL which is later dereferenced. Fix this bug by adding NULL check. of_translate_address() is the same.

Found by code review.

Cc: stable@vger.kernel.org Fixes: 86a18ee21e5e ("EDAC, ti: Add support for TI keystone and DRA7xx EDAC") Signed-off-by: Ma Ke make24@iscas.ac.cn --- Changes in v4: - added the check of of_translate_address() as suggestions. Changes in v3: - added the patch operations omitted in PATCH v2 RESEND compared to PATCH v2. Sorry for my oversight. Changes in v2: - added Cc stable line. --- drivers/edac/ti_edac.c | 10 ++++++++++ 1 file changed, 10 insertions(+)

diff --git a/drivers/edac/ti_edac.c b/drivers/edac/ti_edac.c index 29723c9592f7..f466f12630d3 100644 --- a/drivers/edac/ti_edac.c +++ b/drivers/edac/ti_edac.c @@ -207,14 +207,24 @@ static int _emif_get_id(struct device_node *node) int my_id = 0;

addrp = of_get_address(node, 0, NULL, NULL); + if (!addrp) + return -EINVAL; + my_addr = (u32)of_translate_address(node, addrp); + if (my_addr == OF_BAD_ADDR) + return -EINVAL;

for_each_matching_node(np, ti_edac_of_match) { if (np == node) continue;

addrp = of_get_address(np, 0, NULL, NULL); + if (!addrp) + return -EINVAL; + addr = (u32)of_translate_address(np, addrp); + if (addr == OF_BAD_ADDR) + return -EINVAL;

edac_printk(KERN_INFO, EDAC_MOD_NAME, "addr=%x, my_addr=%x\n",