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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2021-12-22 17:29:45 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2021-12-27 17:01:28 +0100
commit1cdfe9e346b4c5509ffe19ccde880fd259d9f7a3 (patch)
tree427192c5d2a179f30d2d174a81f66e63016439e3 /drivers/acpi/acpica
parent00395b74d57ff81795ec392627db7e1764c94941 (diff)
downloadlinux-1cdfe9e346b4c5509ffe19ccde880fd259d9f7a3.tar.bz2
ACPICA: Utilities: Avoid deleting the same object twice in a row
ACPICA commit c11af67d8f7e3d381068ce7771322f2b5324d687 If original_count is 0 in acpi_ut_update_ref_count (), acpi_ut_delete_internal_obj () is invoked for the target object, which is incorrect, because that object has been deleted once already and the memory allocated to store it may have been reclaimed and allocated for a different purpose by the host OS. Moreover, a confusing debug message following the "Reference Count is already zero, cannot decrement" warning is printed in that case. To fix this issue, make acpi_ut_update_ref_count () return after finding that original_count is 0 and printing the above warning. Link: https://github.com/acpica/acpica/commit/c11af67d Link: https://github.com/acpica/acpica/pull/652 Reported-by: Mark Asselstine <mark.asselstine@windriver.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpica')
-rw-r--r--drivers/acpi/acpica/utdelete.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/utdelete.c b/drivers/acpi/acpica/utdelete.c
index e5ba9795ec69..8d7736d2d269 100644
--- a/drivers/acpi/acpica/utdelete.c
+++ b/drivers/acpi/acpica/utdelete.c
@@ -422,6 +422,7 @@ acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action)
ACPI_WARNING((AE_INFO,
"Obj %p, Reference Count is already zero, cannot decrement\n",
object));
+ return;
}
ACPI_DEBUG_PRINT_RAW((ACPI_DB_ALLOCATIONS,