From: Armin Wolf <W_Armin@xxxxxx> ACPICA commit 1280045754264841b119a5ede96cd005bc09b5a7 If acpi_ps_get_next_field() fails, the previously created field list needs to be properly disposed before returning the status code. Link: https://github.com/acpica/acpica/commit/12800457 Signed-off-by: Armin Wolf <W_Armin@xxxxxx> [ rjw: Rename local variable to avoid compiler confusion ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> --- drivers/acpi/acpica/psargs.c | 39 ++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/drivers/acpi/acpica/psargs.c b/drivers/acpi/acpica/psargs.c index 7debfd5ce0d8..28582adfc0ac 100644 --- a/drivers/acpi/acpica/psargs.c +++ b/drivers/acpi/acpica/psargs.c @@ -25,6 +25,8 @@ acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state); static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state *parser_state); +static void acpi_ps_free_field_list(union acpi_parse_object *start); + /******************************************************************************* * * FUNCTION: acpi_ps_get_next_package_length @@ -683,6 +685,39 @@ static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state return_PTR(field); } +/******************************************************************************* + * + * FUNCTION: acpi_ps_free_field_list + * + * PARAMETERS: start - First Op in field list + * + * RETURN: None. + * + * DESCRIPTION: Free all Op objects inside a field list. + * + ******************************************************************************/ + +static void acpi_ps_free_field_list(union acpi_parse_object *start) +{ + union acpi_parse_object *cur = start; + union acpi_parse_object *next; + union acpi_parse_object *arg; + + while (cur) { + next = cur->common.next; + + /* AML_INT_CONNECTION_OP can have a single argument */ + + arg = acpi_ps_get_arg(cur, 0); + if (arg) { + acpi_ps_free_op(arg); + } + + acpi_ps_free_op(cur); + cur = next; + } +} + /******************************************************************************* * * FUNCTION: acpi_ps_get_next_arg @@ -751,6 +786,10 @@ acpi_ps_get_next_arg(struct acpi_walk_state *walk_state, while (parser_state->aml < parser_state->pkg_end) { field = acpi_ps_get_next_field(parser_state); if (!field) { + if (arg) { + acpi_ps_free_field_list(arg); + } + return_ACPI_STATUS(AE_NO_MEMORY); } -- 2.43.0
