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authorJohan Hovold <johan@kernel.org>2016-11-18 14:17:31 +0200
committerAlexander Shishkin <alexander.shishkin@linux.intel.com>2016-11-18 16:54:39 +0200
commita0ebf519b8a2666438d999c62995618c710573e5 (patch)
tree40ea96d5814491ac0f0e784c75bc69b24ecabf7d /drivers/hwtracing
parenta25f0944ba9b1d8a6813fd6f1a86f1bd59ac25a6 (diff)
stm class: Fix device leak in open error path
Make sure to drop the reference taken by class_find_device() also on allocation errors in open(). Signed-off-by: Johan Hovold <johan@kernel.org> Fixes: 7bd1d4093c2f ("stm class: Introduce an abstraction for...") Cc: stable@vger.kernel.org # v4.6+ Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Diffstat (limited to 'drivers/hwtracing')
-rw-r--r--drivers/hwtracing/stm/core.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/hwtracing/stm/core.c b/drivers/hwtracing/stm/core.c
index 51f81d64ca37..a6ea387b5b00 100644
--- a/drivers/hwtracing/stm/core.c
+++ b/drivers/hwtracing/stm/core.c
@@ -361,7 +361,7 @@ static int stm_char_open(struct inode *inode, struct file *file)
struct stm_file *stmf;
struct device *dev;
unsigned int major = imajor(inode);
- int err = -ENODEV;
+ int err = -ENOMEM;
dev = class_find_device(&stm_class, NULL, &major, major_match);
if (!dev)
@@ -369,8 +369,9 @@ static int stm_char_open(struct inode *inode, struct file *file)
stmf = kzalloc(sizeof(*stmf), GFP_KERNEL);
if (!stmf)
- return -ENOMEM;
+ goto err_put_device;
+ err = -ENODEV;
stm_output_init(&stmf->output);
stmf->stm = to_stm_device(dev);
@@ -382,9 +383,10 @@ static int stm_char_open(struct inode *inode, struct file *file)
return nonseekable_open(inode, file);
err_free:
+ kfree(stmf);
+err_put_device:
/* matches class_find_device() above */
put_device(dev);
- kfree(stmf);
return err;
}