The Infer static analyzer https://fbinfer.com/ reports following NULL poinster dereference by the acpi_os_map_memory() function. I believe this patch does fix the issue without any panic. Signed-off-by: Kiwamu Okabe <okabe@xxxxxxxxxxxxx> --- drivers/acpi/tables.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c index 8ab0a82b4da4..ae7b7343bacf 100644 --- a/drivers/acpi/tables.c +++ b/drivers/acpi/tables.c @@ -717,6 +717,9 @@ acpi_table_initrd_override(struct acpi_table_header *existing_table, while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { table = acpi_os_map_memory(acpi_tables_addr + table_offset, ACPI_HEADER_SIZE); + if (WARN_ON(!table)) { + return AE_OK; + } if (table_offset + table->length > all_tables_size) { acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); WARN_ON(1); @@ -772,6 +775,9 @@ static void __init acpi_table_initrd_scan(void) while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { table = acpi_os_map_memory(acpi_tables_addr + table_offset, ACPI_HEADER_SIZE); + if (WARN_ON(!table)) { + return; + } if (table_offset + table->length > all_tables_size) { acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); WARN_ON(1); -- 2.39.2
