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Commit 254ae43a authored by Masatake YAMATO's avatar Masatake YAMATO Committed by David Teigland
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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: default avatarMasatake YAMATO <yamato@redhat.com>
Signed-off-by: default avatarDavid Teigland <teigland@redhat.com>
parent bce7f793

fs/dlm/user.c

+1 −1
Original line number Diff line number Diff line
@@ -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);