write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/fs/open.c
..
..
@@ -666,10 +666,10 @@
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 		newattrs.ia_valid |= ATTR_GID;
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 		newattrs.ia_gid = gid;
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 	}
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-	if (!S_ISDIR(inode->i_mode))
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-		newattrs.ia_valid |=
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-			ATTR_KILL_SUID | ATTR_KILL_SGID | ATTR_KILL_PRIV;
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 	inode_lock(inode);
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+	if (!S_ISDIR(inode->i_mode))
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+		newattrs.ia_valid |= ATTR_KILL_SUID | ATTR_KILL_PRIV |
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+				     setattr_should_drop_sgid(inode);
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 	error = security_path_chown(path, uid, gid);
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 	if (!error)
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 		error = notify_change(path->dentry, &newattrs, &delegated_inode);
..
..
@@ -1112,7 +1112,7 @@
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 		lookup_flags |= LOOKUP_IN_ROOT;
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 	if (how->resolve & RESOLVE_CACHED) {
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 		/* Don't bother even trying for create/truncate/tmpfile open */
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-		if (flags & (O_TRUNC | O_CREAT | O_TMPFILE))
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+		if (flags & (O_TRUNC | O_CREAT | __O_TMPFILE))
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 			return -EAGAIN;
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 		lookup_flags |= LOOKUP_CACHED;
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 	}