When ftrace_call_adjust() returns 0 for a patch site, ftrace_process_locs() does not skip the site. The NULL test runs before the adjustment since commit 6eeca746fa5f ("ftrace: Test mcount_loc addr before calling ftrace_call_addr()"), so the 0 is stored as the record's ip and ftrace_init_nop() later hits the BUG_ON() in arm64's patch_map(). Test the adjusted address too and count the site as skipped. Reviewed-by: Ben Cressey Reviewed-by: Florent Revest (Anthropic) Assisted-by: LLM Signed-off-by: Jose Fernandez (Anthropic) --- kernel/trace/ftrace.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index f9d80c7bd9f16..394f82230e0c3 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -7676,6 +7676,10 @@ static int ftrace_process_locs(struct module *mod, } addr = ftrace_call_adjust(addr); + if (!addr) { + skipped++; + continue; + } end_offset = (pg->index+1) * sizeof(pg->records[0]); if (end_offset > PAGE_SIZE << pg->order) { -- 2.52.0