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| author | Masatake YAMATO <yamato@redhat.com> | 2008-05-28 14:45:10 +0900 |
|---|---|---|
| committer | David Teigland <teigland@redhat.com> | 2008-07-14 13:56:59 -0500 |
| commit | 254ae43ab8d7877c980fca3636624e0777a70fa4 (patch) | |
| tree | 2a68101ba1c053d167a3f5effed6c33ab1043972 /fs/dlm/user.c | |
| parent | bce7f793daec3e65ec5c5705d2457b81fe7b5725 (diff) | |
| download | linux-254ae43ab8d7877c980fca3636624e0777a70fa4.tar.gz linux-254ae43ab8d7877c980fca3636624e0777a70fa4.tar.bz2 linux-254ae43ab8d7877c980fca3636624e0777a70fa4.zip | |
dlm: check for null in device_write
If `device_write' method is called via "dlm-control",
file->private_data is NULL. (See ctl_device_open() in
user.c. ) Through proc->flags is read.
Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm/user.c')
| -rw-r--r-- | fs/dlm/user.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/dlm/user.c b/fs/dlm/user.c index ebbcf38fd33b..1aa76b32d056 100644 --- a/fs/dlm/user.c +++ b/fs/dlm/user.c @@ -538,7 +538,7 @@ static ssize_t device_write(struct file *file, const char __user *buf, /* do we really need this? can a write happen after a close? */ if ((kbuf->cmd == DLM_USER_LOCK || kbuf->cmd == DLM_USER_UNLOCK) && - test_bit(DLM_PROC_FLAGS_CLOSING, &proc->flags)) + (proc && test_bit(DLM_PROC_FLAGS_CLOSING, &proc->flags))) return -EINVAL; sigfillset(&allsigs); |