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Commit 6760d77b authored by Stefano Sanfilippo's avatar Stefano Sanfilippo Committed by Arnaldo Carvalho de Melo
Browse files

perf jit: Check JITHEADER_VERSION 



Check the version number when opening a jitdump file.  Accept older
versions, but not newer ones.

Signed-off-by: default avatarStefano Sanfilippo <ssanfilippo@chromium.org>
Signed-off-by: default avatarRoss McIlroy <rmcilroy@chromium.org>
Reviewed-by: default avatarStephane Eranian <eranian@google.com>
Cc: Anton Blanchard <anton@ozlabs.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1476356383-30100-9-git-send-email-eranian@google.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 086f9f3d

tools/perf/util/jitdump.c

+6 −0
Original line number Original line Diff line number Diff line
@@ -180,6 +180,12 @@ jit_open(struct jit_buf_desc *jd, const char *name) 
			header.elf_mach,

			header.elf_mach,

			jd->use_arch_timestamp);

			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) {

	if (header.flags & JITDUMP_FLAGS_RESERVED) {

		pr_err("jitdump file contains invalid or unsupported flags 0x%llx\n",

		pr_err("jitdump file contains invalid or unsupported flags 0x%llx\n",

		       (unsigned long long)header.flags & JITDUMP_FLAGS_RESERVED);

		       (unsigned long long)header.flags & JITDUMP_FLAGS_RESERVED);