From e7a95e859cf4da92620b64a04f4d858ea96c2de9 Mon Sep 17 00:00:00 2001 From: Andrew Cooper Date: Tue, 3 Oct 2017 19:07:52 +0100 Subject: [PATCH] xen/ubsan: Implement __ubsan_handle_nonnull_arg() This hook appears to be missing from the Linux ubsan implemention. This patch is a forward port of https://lkml.org/lkml/2014/10/20/182 Signed-off-by: Andrew Cooper Reviewed-by: Wei Liu Acked-by: Jan Beulich --- xen/common/ubsan/ubsan.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/xen/common/ubsan/ubsan.c b/xen/common/ubsan/ubsan.c index fb0409df1b..685b4de0d6 100644 --- a/xen/common/ubsan/ubsan.c +++ b/xen/common/ubsan/ubsan.c @@ -328,6 +328,25 @@ void __ubsan_handle_type_mismatch(struct type_mismatch_data *data, } EXPORT_SYMBOL(__ubsan_handle_type_mismatch); +void __ubsan_handle_nonnull_arg(struct nonnull_arg_data *data) +{ + unsigned long flags; + + if (suppress_report(&data->location)) + return; + + ubsan_prologue(&data->location, &flags); + + pr_err("null pointer passed as argument %d, declared with nonnull attribute\n", + data->arg_index); + + if (location_is_valid(&data->attr_location)) + print_source_location("nonnull attribute declared in ", + &data->attr_location); + + ubsan_epilogue(&flags); +} + void __ubsan_handle_nonnull_return(struct nonnull_return_data *data) { unsigned long flags; -- 2.30.2