From 618b9e575b40c862a62764043c961646f3ebc6dc Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Wed, 2 Oct 2019 09:14:32 -0400 Subject: [PATCH] bcachefs: Fix undefined behaviour roundup_pow_of_two(0) is undefined Signed-off-by: Kent Overstreet --- fs/bcachefs/ec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/bcachefs/ec.c b/fs/bcachefs/ec.c index 155e7c9bd89fe..424d5cf48893a 100644 --- a/fs/bcachefs/ec.c +++ b/fs/bcachefs/ec.c @@ -1351,6 +1351,9 @@ int bch2_ec_mem_alloc(struct bch_fs *c, bool gc) if (ret) return ret; + if (!idx) + return 0; + if (!gc && !init_heap(&c->ec_stripes_heap, roundup_pow_of_two(idx), GFP_KERNEL)) -- 2.30.2