The patch titled
Subject: hfs: do not free node before using
has been removed from the -mm tree. Its filename was
hfs-do-not-free-node-before-using.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Pan Bian <bianpan2016@xxxxxxx>
Subject: hfs: do not free node before using
hfs_bmap_free() frees the node via hfs_bnode_put(node). However, it then
reads node->this when dumping error message on an error path, which may
result in a use-after-free bug. This patch frees the node only when it is
never again used.
Link: http://lkml.kernel.org/r/1542963889-128825-1-git-send-email-bianpan2016@xxxxxxx
Fixes: a1185ffa2fc ("HFS rewrite")
Signed-off-by: Pan Bian <bianpan2016@xxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Joe Perches <joe@xxxxxxxxxxx>
Cc: Ernesto A. Fernandez <ernesto.mnd.fernandez@xxxxxxxxx>
Cc: Viacheslav Dubeyko <slava@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/hfs/btree.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/hfs/btree.c~hfs-do-not-free-node-before-using
+++ a/fs/hfs/btree.c
@@ -338,13 +338,14 @@ void hfs_bmap_free(struct hfs_bnode *nod
nidx -= len * 8;
i = node->next;
- hfs_bnode_put(node);
if (!i) {
/* panic */;
pr_crit("unable to free bnode %u. bmap not found!\n",
node->this);
+ hfs_bnode_put(node);
return;
}
+ hfs_bnode_put(node);
node = hfs_bnode_find(tree, i);
if (IS_ERR(node))
return;
_
Patches currently in -mm which might be from bianpan2016@xxxxxxx are
