diff options
| author | Hanjun Guo <guohanjun@huawei.com> | 2022-11-17 19:23:42 +0800 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko@kernel.org> | 2022-12-08 16:20:47 +0000 |
| commit | db9622f762104459ff87ecdf885cc42c18053fd9 (patch) | |
| tree | 8a7d8a460f0f3f6dd623d2edb3609f828839d8d1 | |
| parent | 37e90c374dd11cf4919c51e847c6d6ced0abc555 (diff) | |
| download | lwn-db9622f762104459ff87ecdf885cc42c18053fd9.tar.gz lwn-db9622f762104459ff87ecdf885cc42c18053fd9.zip | |
tpm: tpm_tis: Add the missed acpi_put_table() to fix memory leak
In check_acpi_tpm2(), we get the TPM2 table just to make
sure the table is there, not used after the init, so the
acpi_put_table() should be added to release the ACPI memory.
Fixes: 4cb586a188d4 ("tpm_tis: Consolidate the platform and acpi probe flow")
Cc: stable@vger.kernel.org
Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
| -rw-r--r-- | drivers/char/tpm/tpm_tis.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index bcff6429e0b4..ed5dabd3c72d 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -125,6 +125,7 @@ static int check_acpi_tpm2(struct device *dev) const struct acpi_device_id *aid = acpi_match_device(tpm_acpi_tbl, dev); struct acpi_table_tpm2 *tbl; acpi_status st; + int ret = 0; if (!aid || aid->driver_data != DEVICE_IS_TPM2) return 0; @@ -132,8 +133,7 @@ static int check_acpi_tpm2(struct device *dev) /* If the ACPI TPM2 signature is matched then a global ACPI_SIG_TPM2 * table is mandatory */ - st = - acpi_get_table(ACPI_SIG_TPM2, 1, (struct acpi_table_header **)&tbl); + st = acpi_get_table(ACPI_SIG_TPM2, 1, (struct acpi_table_header **)&tbl); if (ACPI_FAILURE(st) || tbl->header.length < sizeof(*tbl)) { dev_err(dev, FW_BUG "failed to get TPM2 ACPI table\n"); return -EINVAL; @@ -141,9 +141,10 @@ static int check_acpi_tpm2(struct device *dev) /* The tpm2_crb driver handles this device */ if (tbl->start_method != ACPI_TPM2_MEMORY_MAPPED) - return -ENODEV; + ret = -ENODEV; - return 0; + acpi_put_table((struct acpi_table_header *)tbl); + return ret; } #else static int check_acpi_tpm2(struct device *dev) |