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authorLv Zheng <lv.zheng@intel.com>2017-06-05 16:40:26 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-06-12 14:58:42 +0200
commitdba744cd941b4eeb153a34877c62293903382751 (patch)
tree130c7dc3f0f198def07611fd9bbd9fee969c5858 /drivers/acpi/acpica
parent2cb8c3bbfbd78bf616bef8af2ba6214ca3679ebe (diff)
ACPICA: Dispatcher: Remove unnecessary call to debugger
ACPICA commit eaa455accf165fee2df26410e271aab162264f6c UBSAN reports an index out of range use in dsutils.c. acpi_db_display_argument_object( walk_state->operands[walk_state->num_operands - 1], ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ walk_state); This call was simply wrong, generated redundant debugger messages, and resulted in a -1 index into the operand stack. Linux kernel bug #120351 (link #1) and #194845 (link #2). Originally fixed by Navin P.S. (link #1, comment 8), refined by Lv Zheng (link #3). Link: https://bugzilla.kernel.org/show_bug.cgi?id=120351 [#1] Link: https://bugzilla.kernel.org/show_bug.cgi?id=194845 [#2] Link: https://github.com/acpica/acpica/pull/245 [#3] Link: https://github.com/acpica/acpica/commit/eaa455ac Reported-by: Wilfried Klaebe <linux-kernel@lebenslange-mailadresse.de> Reported-by: Ronald Warsow <rwarsow@gmx.de> Original-by: Navin P.S. <navinp1912@gmail.com> Signed-off-by: Lv Zheng <lv.zheng@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/dsutils.c9
1 files changed, 0 insertions, 9 deletions
diff --git a/drivers/acpi/acpica/dsutils.c b/drivers/acpi/acpica/dsutils.c
index 406edec20de7..0dabd9b95684 100644
--- a/drivers/acpi/acpica/dsutils.c
+++ b/drivers/acpi/acpica/dsutils.c
@@ -633,15 +633,6 @@ acpi_ds_create_operand(struct acpi_walk_state *walk_state,
if ((op_info->flags & AML_HAS_RETVAL) ||
(arg->common.flags & ACPI_PARSEOP_IN_STACK)) {
- ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
- "Argument previously created, already stacked\n"));
-
- acpi_db_display_argument_object(walk_state->
- operands[walk_state->
- num_operands -
- 1],
- walk_state);
-
/*
* Use value that was already previously returned
* by the evaluation of this argument