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1f0d8a566f
When zpl_fill_super -> zfs_domount fails (e.g. because the dataset was destroyed before it could be successfully mounted) the subsequent call to zpl_kill_sb -> zfs_preumount would derefence a NULL pointer. This bug can be reproduced using this shell script: #!/bin/sh ( while true; do zfs create -o mountpoint=legacz tank/bar zfs destroy tank/bar done ) & ( while true; do mount -t zfs tank/bar /mnt umount /mnt done ) & Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #639 |
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