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| author | Lv Zheng <lv.zheng@intel.com> | 2017-07-10 15:23:21 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-07-20 16:38:24 +0200 |
| commit | 96d07940623a2a40b2eec01daebf93bbaaee8a3b (patch) | |
| tree | c724cc030b349e5c004c04925b30721249c0b67c /drivers/acpi/acpica/tbxface.c | |
| parent | 7679c35da5b5afa78ce6766f5966a5a4579d4332 (diff) | |
| download | linux-96d07940623a2a40b2eec01daebf93bbaaee8a3b.tar.gz linux-96d07940623a2a40b2eec01daebf93bbaaee8a3b.tar.bz2 linux-96d07940623a2a40b2eec01daebf93bbaaee8a3b.zip | |
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.c | 4 |
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 */ |