6.5-stable review patch. If anyone has any objections, please let me know.
------------------
From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
[ Upstream commit c54719c92aa3129f330cce81b88cf34f1627f756 ]
d_inode_rcu() is right - we might be in rcu pathwalk;
however, OVL_E() hides plain d_inode() on the same dentry...
Fixes: a6ff2bc0be17 ("ovl: use OVL_E() and OVL_E_FLAGS() accessors")
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/overlayfs/super.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 8e9c1cf83df24..1090c68e5b051 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -101,8 +101,8 @@ static int ovl_revalidate_real(struct dentry *d, unsigned int flags, bool weak)
static int ovl_dentry_revalidate_common(struct dentry *dentry,
unsigned int flags, bool weak)
{
- struct ovl_entry *oe = OVL_E(dentry);
- struct ovl_path *lowerstack = ovl_lowerstack(oe);
+ struct ovl_entry *oe;
+ struct ovl_path *lowerstack;
struct inode *inode = d_inode_rcu(dentry);
struct dentry *upper;
unsigned int i;
@@ -112,6 +112,8 @@ static int ovl_dentry_revalidate_common(struct dentry *dentry,
if (!inode)
return -ECHILD;
+ oe = OVL_I_E(inode);
+ lowerstack = ovl_lowerstack(oe);
upper = ovl_i_dentry_upper(inode);
if (upper)
ret = ovl_revalidate_real(upper, flags, weak);
--
2.40.1
