diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2017-04-25 21:58:31 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-04-27 00:27:49 +0200 |
| commit | 0de0e198bc7191a0e46cf71f66fec4d07ca91396 (patch) | |
| tree | c87c76de72cb5ba4f4d93a3b85f4f39ed5b92eaf /drivers/char/bfin-otp.c | |
| parent | Linux 4.11-rc8 (diff) | |
| download | linux-0de0e198bc7191a0e46cf71f66fec4d07ca91396.tar.xz linux-0de0e198bc7191a0e46cf71f66fec4d07ca91396.zip | |
ACPI / sysfs: fix acpi_get_table() leak / acpi-sysfs denial of service
Reading an ACPI table through the /sys/firmware/acpi/tables interface
more than 65,536 times leads to the following log message:
ACPI Error: Table ffff88033595eaa8, Validation count is zero after increment
(20170119/tbutils-423)
...and the table being unavailable until the next reboot. Add the
missing acpi_put_table() so the table ->validation_count is decremented
after each read.
Reported-by: Anush Seetharaman <anush.seetharaman@intel.com>
Fixes: 174cc7187e6f "ACPICA: Tables: Back port acpi_get_table_with_size() ..."
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Cc: 4.10+ <stable@vger.kernel.org> # 4.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/char/bfin-otp.c')
0 files changed, 0 insertions, 0 deletions