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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-11-07 18:42:36 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-07 12:07:31 +0100 |
| commit | 38e251d356a01b61a86cb35213cafd7e8fe7090c (patch) | |
| tree | 2dbdd8ff54deb72d013c544c1fda9a15789f1ae1 | |
| parent | f8d4d0bac603616e2fa4a3907e81ed13f8f3c380 (diff) | |
| download | linux-stable-38e251d356a01b61a86cb35213cafd7e8fe7090c.tar.gz linux-stable-38e251d356a01b61a86cb35213cafd7e8fe7090c.tar.bz2 linux-stable-38e251d356a01b61a86cb35213cafd7e8fe7090c.zip | |
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@huawei.com/ # [1]
Reported-by: Chen Zhongjin <chenzhongjin@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Chen Zhongjin <chenzhongjin@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/acpi/acpica/dsmethod.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/acpi/acpica/dsmethod.c b/drivers/acpi/acpica/dsmethod.c index 2b3210f42a46..b77d6b86e3f9 100644 --- a/drivers/acpi/acpica/dsmethod.c +++ b/drivers/acpi/acpica/dsmethod.c @@ -547,7 +547,7 @@ 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]; @@ -559,7 +559,7 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread, ACPI_FREE(info); if (ACPI_FAILURE(status)) { - goto cleanup; + goto pop_walk_state; } /* @@ -591,6 +591,12 @@ 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 */ |