5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Joe Hattori <joe@xxxxxxxxxxxxxxxxxxxxx>
commit 5d8e2971e817bb64225fc0b6327a78752f58a9aa upstream.
In tpm_bios_measurements_open(), get_device() is called on the device
embedded in struct tpm_chip. In the error path, however, put_device() is
not called. This results in a reference count leak, which prevents the
device from being properly released. This commit makes sure to call
put_device() when the seq_open() call fails.
Cc: stable@xxxxxxxxxxxxxxx # +v4.18
Fixes: 9b01b5356629 ("tpm: Move shared eventlog functions to common.c")
Signed-off-by: Joe Hattori <joe@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/char/tpm/eventlog/common.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/char/tpm/eventlog/common.c
+++ b/drivers/char/tpm/eventlog/common.c
@@ -47,6 +47,8 @@ static int tpm_bios_measurements_open(st
if (!err) {
seq = file->private_data;
seq->private = chip;
+ } else {
+ put_device(&chip->dev);
}
return err;
