bcachefs: Fix divide by zero in rebalance_work()

This fixes https://github.com/koverstreet/bcachefs-tools/issues/159

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/rebalance.c b/fs/bcachefs/rebalance.c
index c3d577236ce2b1f22932eed06484062cc6e9e678..15ce3ecba0baf2e08412bff7f5601a183dbf636f 100644 (file)
--- a/fs/bcachefs/rebalance.c
+++ b/fs/bcachefs/rebalance.c
@@ -113,6 +113,10 @@ static void rebalance_work_accumulate(struct rebalance_work *w,
        unsigned percent_full;
        u64 work = dev_work + unknown_dev;
 
+       /* avoid divide by 0 */
+       if (!capacity)
+               return;
+
        if (work < dev_work || work < unknown_dev)
                work = U64_MAX;
        work = min(work, capacity);