From 86ea895b1a208925dfc034fac22db2a512a3fab8 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sat, 8 Mar 2025 11:36:02 +0100
Subject: ext2fs: Fix failed assertion on ENOSPC

find_block ignores EINVAL errors, we need to reconstruct it
---
 ext2fs/pager.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ext2fs/pager.c b/ext2fs/pager.c
index 61db0dff..e8a5a66a 100644
--- a/ext2fs/pager.c
+++ b/ext2fs/pager.c
@@ -410,7 +410,11 @@ file_pager_write_page (struct node *node, vm_offset_t offset, void *buf)
       err = find_block (node, offset, &block, &lock);
       if (err)
 	break;
-      assert_backtrace (block);
+      if (!block)
+	{
+	  err = EINVAL;
+	  break;
+	}
       pending_blocks_add (&pb, block);
       offset += block_size;
       left -= block_size;
-- 
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