[Bug 261850] fs/ext2fs: Fix bug in disk data block allocation

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 10 Feb 2022 07:19:35 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261850

--- Comment #3 from chenguang.wang <chenguang.wang@terapines.com> ---
Created attachment 231702
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=231702&action=edit
fs/ext2fs: Fix bug in disk data block allocation.

git diff fs/ext2fs/ext2_alloc.c
diff --git a/fs/ext2fs/ext2_alloc.c b/fs/ext2fs/ext2_alloc.c
index 4c265a1a8..9e05d02de 100644
--- a/fs/ext2fs/ext2_alloc.c
+++ b/fs/ext2fs/ext2_alloc.c
@@ -1067,7 +1067,7 @@ ext2_alloccg(struct inode *ip, int cg, daddr_t bpref, int
size)
                start = dtogd(fs, bpref) / NBBY;
        else
                start = 0;
-       end = howmany(fs->e2fs_fpg, NBBY) - start;
+       end = howmany(fs->e2fs_fpg, NBBY);
 retry:
        runlen = 0;
        runstart = 0;

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