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authorLv Zheng <lv.zheng@intel.com>2017-07-10 10:23:21 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-07-20 17:38:24 +0300
commit96d07940623a2a40b2eec01daebf93bbaaee8a3b (patch)
treec724cc030b349e5c004c04925b30721249c0b67c /drivers/acpi/acpica/tbxface.c
parent7679c35da5b5afa78ce6766f5966a5a4579d4332 (diff)
downloadlinux-96d07940623a2a40b2eec01daebf93bbaaee8a3b.tar.xz
ACPICA: Tables: Add sanity check in acpi_put_table()
ACPICA commit 73512384c9eb1e7f1b28d0a7372df26a3732f96b To avoid caller to trigger unexpected warning messages (Link #1): ACPI Warning: Table ffffffffbb461d20, Validation count is zero before decrement Which is reported from acpi_tb_put_table(). When the table is validated, the pointer must be non-zero. Thus the message is not suitable for invalidated tables. This patch fixes the callee side based on this fact. Reported by Cristian Aravena Romero, Fixed by Lv Zheng. Link: https://github.com/acpica/acpica/commit/73512384 Link: https://bugzilla.kernel.org/show_bug.cgi?id=191221 [#1] Reported-by: Cristian Aravena Romero <caravena@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/tbxface.c')
-rw-r--r--drivers/acpi/acpica/tbxface.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/tbxface.c b/drivers/acpi/acpica/tbxface.c
index 010b1c43df92..18508b2c0c05 100644
--- a/drivers/acpi/acpica/tbxface.c
+++ b/drivers/acpi/acpica/tbxface.c
@@ -369,6 +369,10 @@ void acpi_put_table(struct acpi_table_header *table)
ACPI_FUNCTION_TRACE(acpi_put_table);
+ if (!table) {
+ return_VOID;
+ }
+
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
/* Walk the root table list */