This is a note to let you know that I've just added the patch titled ACPICA: Fix error code path in acpi_ds_call_control_method() to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: acpica-fix-error-code-path-in-acpi_ds_call_control_m.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit f49ead307e06876cb94839e84708c470fb13f05d Author: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Date: Mon Nov 7 18:42:36 2022 +0100 ACPICA: Fix error code path in acpi_ds_call_control_method() [ Upstream commit 404ec60438add1afadaffaed34bb5fe4ddcadd40 ] A use-after-free in acpi_ps_parse_aml() after a failing invocaion of acpi_ds_call_control_method() is reported by KASAN [1] and code inspection reveals that next_walk_state pushed to the thread by acpi_ds_create_walk_state() is freed on errors, but it is not popped from the thread beforehand. Thus acpi_ds_get_current_walk_state() called by acpi_ps_parse_aml() subsequently returns it as the new walk state which is incorrect. To address this, make acpi_ds_call_control_method() call acpi_ds_pop_walk_state() to pop next_walk_state from the thread before returning an error. Link: https://lore.kernel.org/linux-acpi/20221019073443.248215-1-chenzhongjin@xxxxxxxxxx/ # [1] Reported-by: Chen Zhongjin <chenzhongjin@xxxxxxxxxx> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Reviewed-by: Chen Zhongjin <chenzhongjin@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/acpi/acpica/dsmethod.c b/drivers/acpi/acpica/dsmethod.c index 8e011e59b9b4..ee1832ba39a2 100644 --- a/drivers/acpi/acpica/dsmethod.c +++ b/drivers/acpi/acpica/dsmethod.c @@ -517,7 +517,7 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread, info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); if (!info) { status = AE_NO_MEMORY; - goto cleanup; + goto pop_walk_state; } info->parameters = &this_walk_state->operands[0]; @@ -529,7 +529,7 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread, ACPI_FREE(info); if (ACPI_FAILURE(status)) { - goto cleanup; + goto pop_walk_state; } next_walk_state->method_nesting_depth = @@ -575,6 +575,12 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread, return_ACPI_STATUS(status); +pop_walk_state: + + /* On error, pop the walk state to be deleted from thread */ + + acpi_ds_pop_walk_state(thread); + cleanup: /* On error, we must terminate the method properly */