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| author | Alexander Strakh <cromlehg@gmail.com> | 2011-02-10 15:01:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-02-11 16:12:20 -0800 |
| commit | 24a6f5b8589d2abfbf523c59ab1258726edc164f (patch) | |
| tree | a62ac7fff1761759f32783cd0b1bfbdda396757b | |
| parent | 6e20fb18054c179d7e64c0af43d855b9310a3394 (diff) | |
| download | lwn-24a6f5b8589d2abfbf523c59ab1258726edc164f.tar.gz lwn-24a6f5b8589d2abfbf523c59ab1258726edc164f.zip | |
drivers/rtc/rtc-proc.c: add module_put on error path in rtc_proc_open()
In file drivers/rtc/rtc-proc.c seq_open() can return -ENOMEM.
86 if (!try_module_get(THIS_MODULE))
87 return -ENODEV;
88
89 return single_open(file, rtc_proc_show, rtc);
In this case before exiting (line 89) from rtc_proc_open the
module_put(THIS_MODULE) must be called.
Found by Linux Device Drivers Verification Project
Signed-off-by: Alexander Strakh <strakh@ispras.ru>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/rtc/rtc-proc.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-proc.c b/drivers/rtc/rtc-proc.c index c086fc30a84c..242bbf86c74a 100644 --- a/drivers/rtc/rtc-proc.c +++ b/drivers/rtc/rtc-proc.c @@ -81,12 +81,16 @@ static int rtc_proc_show(struct seq_file *seq, void *offset) static int rtc_proc_open(struct inode *inode, struct file *file) { + int ret; struct rtc_device *rtc = PDE(inode)->data; if (!try_module_get(THIS_MODULE)) return -ENODEV; - return single_open(file, rtc_proc_show, rtc); + ret = single_open(file, rtc_proc_show, rtc); + if (ret) + module_put(THIS_MODULE); + return ret; } static int rtc_proc_release(struct inode *inode, struct file *file) |