Memory leak in tpm_ascii_bios_measurements_open()

Coverity found a memory leak in tpm_ascii_bios_measurements_open().

If "read_log(log)" fails, then we may leak 'log' and
'log->bios_event_log'.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Cc: Seiji Munetoh <munetoh@jp.ibm.com>
Cc: Stefan Berger <stefanb@us.ibm.com>
Cc: Reiner Sailer <sailer@watson.ibm.com>
Cc: Kylene Hall <kjhall@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 3 deletions

diff --git a/drivers/char/tpm/tpm_bios.c b/drivers/char/tpm/tpm_bios.c
index 4eba32b23b29..4b26ce48189b 100644
--- a/drivers/char/tpm/tpm_bios.c
+++ b/drivers/char/tpm/tpm_bios.c
@@ -427,7 +427,7 @@ static int tpm_ascii_bios_measurements_open(struct inode *inode,
                 return -ENOMEM;
 
         if ((err = read_log(log)))
-                return err;
+                goto out_free;
 
         /* now register seq file */
         err = seq_open(file, &tpm_ascii_b_measurments_seqops);
@@ -435,10 +435,15 @@ static int tpm_ascii_bios_measurements_open(struct inode *inode,
                 seq = file->private_data;
                 seq->private = log;
         } else {
-                kfree(log->bios_event_log);
-                kfree(log);
+                goto out_free;
         }
+
+out:
         return err;
+out_free:
+        kfree(log->bios_event_log);
+        kfree(log);
+        goto out;
 }
 
 const struct file_operations tpm_ascii_bios_measurements_ops = {