debug lk

hc

2024-02-20 e636c8d336489bf3eed5878299e6cc045bbad077

 kernel/fs/overlayfs/super.c
..
..
@@ -144,11 +144,16 @@
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 					unsigned int flags, bool weak)
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 {
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 	struct ovl_entry *oe = dentry->d_fsdata;
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+	struct inode *inode = d_inode_rcu(dentry);
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 	struct dentry *upper;
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 	unsigned int i;
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 	int ret = 1;
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-	upper = ovl_dentry_upper(dentry);
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+	/* Careful in RCU mode */
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+	if (!inode)
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+		return -ECHILD;
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+
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+	upper = ovl_i_dentry_upper(inode);
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 	if (upper)
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 		ret = ovl_revalidate_real(upper, flags, weak);
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159
 
..
..
@@ -1887,7 +1892,7 @@
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 	ovl_dentry_set_flag(OVL_E_CONNECTED, root);
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 	ovl_set_upperdata(d_inode(root));
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 	ovl_inode_init(d_inode(root), &oip, ino, fsid);
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-	ovl_dentry_update_reval(root, upperdentry, DCACHE_OP_WEAK_REVALIDATE);
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+	ovl_dentry_init_flags(root, upperdentry, DCACHE_OP_WEAK_REVALIDATE);
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1896
 
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 	return root;
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 }
..
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@@ -2047,7 +2052,7 @@
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 	sb->s_xattr = ovl_xattr_handlers;
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 	sb->s_fs_info = ofs;
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 	sb->s_flags |= SB_POSIXACL;
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-	sb->s_iflags |= SB_I_SKIP_SYNC;
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+	sb->s_iflags |= SB_I_SKIP_SYNC | SB_I_IMA_UNVERIFIABLE_SIGNATURE;
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2056
 
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 	err = -ENOMEM;
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 	root_dentry = ovl_get_root(sb, upperpath.dentry, oe);