https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261850
Bug ID: 261850
Summary: Ext2 FileSystem: There is a bug in disk data block
allocation
Product: Base System
Version: 13.0-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
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;
In this function, the variable "start" is the starting position where we
traverse the block bitmap of a cylinder group , and the variable "end" is the
ending position. Therefore, I don't think we should subtract "start" in the
process of calculating "end".
In fact, I'm not sure if there's something wrong with my understanding. I
would be very grateful if someone could help me！
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