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| author | Yonghua Zheng <younghua.zheng@gmail.com> | 2013-07-30 14:16:10 +0800 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-07-31 19:48:55 +0200 |
| commit | 8e552e535948fe8612d36a7beaf19519140bc285 (patch) | |
| tree | 72e448701c7f02aa85e9fedd1f828616f322f4b0 /drivers/hid/hidraw.c | |
| parent | 6f498018279d118cf38945f73da7c9345f7e2e5d (diff) | |
| download | linux-stable-8e552e535948fe8612d36a7beaf19519140bc285.tar.gz linux-stable-8e552e535948fe8612d36a7beaf19519140bc285.tar.bz2 linux-stable-8e552e535948fe8612d36a7beaf19519140bc285.zip | |
HID: hidraw: fix improper mutex release
Mutex can not be released unless all hid_device members are properly
initialized. Otherwise it would result in a race condition that can
cause NULL pointer kernel panic issue in hidraw_open where it uses
uninitialized 'list' member in list_add_tail().
Signed-off-by: Yonghua Zheng <younghua.zheng@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hidraw.c')
| -rw-r--r-- | drivers/hid/hidraw.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c index a7451632ceb4..6f1feb2c2e97 100644 --- a/drivers/hid/hidraw.c +++ b/drivers/hid/hidraw.c @@ -518,7 +518,6 @@ int hidraw_connect(struct hid_device *hid) goto out; } - mutex_unlock(&minors_lock); init_waitqueue_head(&dev->wait); INIT_LIST_HEAD(&dev->list); @@ -528,6 +527,7 @@ int hidraw_connect(struct hid_device *hid) dev->exist = 1; hid->hidraw = dev; + mutex_unlock(&minors_lock); out: return result; |