From 2e118ba36d56acf78084518dfb7cb53b1d417da0 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Fri, 21 Jun 2024 16:29:32 -0400
Subject: [PATCH] bcachefs: darray: Don't pass NULL to memcpy()

memcpy's second parameter must not be NULL, even if size is zero.

Signed-off-by: Tavian Barnes <tavianator@tavianator.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---
 fs/bcachefs/darray.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/bcachefs/darray.c b/fs/bcachefs/darray.c
index ac35b8b705ae..b7d223f85873 100644
--- a/fs/bcachefs/darray.c
+++ b/fs/bcachefs/darray.c
@@ -13,7 +13,8 @@ int __bch2_darray_resize(darray_char *d, size_t element_size, size_t new_size, g
 		if (!data)
 			return -ENOMEM;
 
-		memcpy(data, d->data, d->size * element_size);
+		if (d->size)
+			memcpy(data, d->data, d->size * element_size);
 		if (d->data != d->preallocated)
 			kvfree(d->data);
 		d->data	= data;