superrob1500
/
mirror-linux
mirror of https://github.com/torvalds/linux
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

jfs: fix metapage reference count leak in dbAllocCtl 

In dbAllocCtl(), read_metapage() increases the reference count of the
metapage. However, when dp->tree.budmin < 0, the function returns -EIO
without calling release_metapage() to decrease the reference count,
leading to a memory leak.

Add release_metapage(mp) before the error return to properly manage
the metapage reference count and prevent the leak.

Fixes: a5f5e4698f ("jfs: fix shift-out-of-bounds in dbSplit")

Signed-off-by: Zheng Yu <zheng.yu@northwestern.edu>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
pull/1310/head
Zheng Yu 2025-07-29 01:22:14 +00:00 committed by Dave Kleikamp
parent b89798e79c
commit 856db37592
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/jfs/jfs_dmap.c
View File

@ -1815,8 +1815,10 @@ dbAllocCtl(struct bmap * bmp, s64 nblocks, int l2nb, s64 blkno, s64 * results)
return -EIO; return -EIO;
dp = (struct dmap *) mp->data; dp = (struct dmap *) mp->data;
if (dp->tree.budmin < 0) if (dp->tree.budmin < 0) {
release_metapage(mp);
return -EIO; return -EIO;
}
/* try to allocate the blocks. /* try to allocate the blocks.
*/ */