Re: [syzbot] Test patch

[syzbot]

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linux-kernel@xxxxxxxxxxxxxxx, syzkaller-bugs@xxxxxxxxxxxxxxxx.

***

Subject: Test patch
Author: yuran.pereira@xxxxxxxxxxx

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

---
 fs/bfs/file.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/bfs/file.c b/fs/bfs/file.c
index adc2230079c6..8a97909b1484 100644
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -38,7 +38,12 @@ static int bfs_move_block(unsigned long from, unsigned long to,
 	bh = sb_bread(sb, from);
 	if (!bh)
 		return -EIO;
+
 	new = sb_getblk(sb, to);
+	if (!new) {
+		bforget(bh);
+		return -ENOMEM;
+	}
 	memcpy(new->b_data, bh->b_data, bh->b_size);
 	mark_buffer_dirty(new);
 	bforget(bh);
-- 
2.25.1