From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Thu, 17 Aug 2023 20:35:58 +0000 (-0400)
Subject: bcachefs: Fix divide by zero in rebalance_work()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d0445e131e3ff1a68492f7f6e754cd672db4774d;p=linux.git

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 c3d577236ce2b..15ce3ecba0baf 100644
--- 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);