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Make sure that we free the passed in data message if we don't actually
insert it onto the queue. Also, fix a mtx leak if someone turns off devctl while we're processing a messages. MFC after: 5 days
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parent
bd34cda61a
commit
e8b93e4257
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=206916
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@ -545,15 +545,16 @@ devctl_queue_data(char *data)
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struct proc *p;
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if (strlen(data) == 0)
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return;
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goto out;
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if (devctl_queue_length == 0)
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return;
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goto out;
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n1 = malloc(sizeof(*n1), M_BUS, M_NOWAIT);
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if (n1 == NULL)
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return;
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goto out;
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n1->dei_data = data;
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mtx_lock(&devsoftc.mtx);
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if (devctl_queue_length == 0) {
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mtx_unlock(&devsoftc.mtx);
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free(n1->dei_data, M_BUS);
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free(n1, M_BUS);
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return;
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@ -577,6 +578,14 @@ devctl_queue_data(char *data)
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psignal(p, SIGIO);
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PROC_UNLOCK(p);
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}
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return;
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out:
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/*
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* We have to free data on all error paths since the caller
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* assumes it will be free'd when this item is dequeued.
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*/
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free(data, M_BUS);
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return;
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}
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/**
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