From 6760d77b708571b925e2dd2b61f847cbee6e0f21 Mon Sep 17 00:00:00 2001 From: Stefano Sanfilippo Date: Thu, 13 Oct 2016 03:59:42 -0700 Subject: [PATCH] perf jit: Check JITHEADER_VERSION Check the version number when opening a jitdump file. Accept older versions, but not newer ones. Signed-off-by: Stefano Sanfilippo Signed-off-by: Ross McIlroy Reviewed-by: Stephane Eranian Cc: Anton Blanchard Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1476356383-30100-9-git-send-email-eranian@google.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/jitdump.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/perf/util/jitdump.c b/tools/perf/util/jitdump.c index 6a2688da3c4a..c9a941ef0f6d 100644 --- a/tools/perf/util/jitdump.c +++ b/tools/perf/util/jitdump.c @@ -180,6 +180,12 @@ jit_open(struct jit_buf_desc *jd, const char *name) header.elf_mach, jd->use_arch_timestamp); + if (header.version > JITHEADER_VERSION) { + pr_err("wrong jitdump version %u, expected " STR(JITHEADER_VERSION), + header.version); + goto error; + } + if (header.flags & JITDUMP_FLAGS_RESERVED) { pr_err("jitdump file contains invalid or unsupported flags 0x%llx\n", (unsigned long long)header.flags & JITDUMP_FLAGS_RESERVED); -- 2.20.1