fuse_session_unmount(): fix unmounting as root

We have to store the channel before removing it from the session,
otherwise we cannot use it to do the unmount.

This problem was introduced in commit 5698ee09cf7.

Thanks to Michael Theall for reporting & debugging this.

diff --git a/lib/fuse_lowlevel.c b/lib/fuse_lowlevel.c
index 43539da296c8f1d7e83a9ebdbfd5d811c2aac547..2a7c580b1062383ef70b372c9a323d26d35fa332 100755 (executable)
--- a/lib/fuse_lowlevel.c
+++ b/lib/fuse_lowlevel.c
@@ -2988,11 +2988,12 @@ error_out:
 
 void fuse_session_unmount(struct fuse_session *se)
 {
-       fuse_session_remove_chan(se->ch);
+       struct fuse_chan *ch = se->ch;
+       fuse_session_remove_chan(ch);
        if (se->mountpoint) {
-               int fd = se->ch ? fuse_chan_clearfd(se->ch) : -1;
+               int fd = ch ? fuse_chan_clearfd(ch) : -1;
                fuse_kern_unmount(se->mountpoint, fd);
-               fuse_chan_put(se->ch);
+               fuse_chan_put(ch);
                free(se->mountpoint);
                se->mountpoint = NULL;
        }