filemon_dtr: Lock the associated filemon handle before writing to it.
Reported by: mjg MFC after: 2 weeks Sponsored by: EMC / Isilon Storage Division
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=294957
@ -126,14 +126,16 @@ filemon_dtr(void *data)
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struct filemon *filemon = data;
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if (filemon != NULL) {
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struct file *fp = filemon->fp;
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struct file *fp;
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/* Get exclusive write access. */
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/* Follow same locking order as filemon_pid_check. */
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filemon_lock_write();
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filemon_filemon_lock(filemon);
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/* Remove from the in-use list. */
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TAILQ_REMOVE(&filemons_inuse, filemon, link);
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fp = filemon->fp;
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filemon->fp = NULL;
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filemon->pid = -1;
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@ -141,6 +143,7 @@ filemon_dtr(void *data)
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TAILQ_INSERT_TAIL(&filemons_free, filemon, link);
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/* Give up write access. */
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filemon_filemon_unlock(filemon);
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filemon_unlock_write();
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if (fp != NULL)
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