On Tue, May 16, 2017 at 12:27:48PM -0700, Darrick J. Wong wrote: > If a malicious user corrupts the refcount btree to cause a cycle between > different levels of the tree, the next mount attempt will deadlock in > the CoW recovery routine while grabbing buffer locks. We can use the > ability to re-grab a buffer that was previous locked to a transaction to > avoid deadlocks, so do that here. > > Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Missing comments in the code explaining the deadlock being avoided by using xfs_trans_alloc_empty().... Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
