+Cc Catalin, Will

On 2025/8/28 19:22, Miaoqian Lin wrote:

If krealloc_array() fails in iort_rmr_alloc_sids(), the function returns NULL but does not free the original 'sids' allocation. This results in a memory leak since the caller overwrites the original pointer with the NULL return value.

Fixes: 491cf4a6735a ("ACPI/IORT: Add support to retrieve IORT RMR reserved regions") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin linmq006@gmail.com

---

This follows the same pattern as the fix in commit 06615967d488 ("bpf, verifier: Fix memory leak in array reallocation for stack state").

---

drivers/acpi/arm64/iort.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 98759d6199d3..65f0f56ad753 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -937,8 +937,10 @@ static u32 *iort_rmr_alloc_sids(u32 *sids, u32 count, u32 id_start, new_sids = krealloc_array(sids, count + new_count, sizeof(*new_sids), GFP_KERNEL);

• if (!new_sids)

• if (!new_sids) {

• kfree(sids);
  

  return NULL;
• }

for (i = count; i < total_count; i++) new_sids[i] = id_start++;

Good catch!

Reviewed-by: Hanjun Guo guohanjun@huawei.com

Thanks Hanjun