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lf-6.6.y
linux-imx/tools/perf/util/intel-pt-decoder
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Adrian Hunter 6bb1efff9b perf intel-pt: Fix unassigned instruction op (discovered by MemorySanitizer) 
[ Upstream commit e101a05f79 ]

MemorySanitizer discovered instances where the instruction op value was
not assigned.:

  WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x5581c00a76b3 in intel_pt_sample_flags tools/perf/util/intel-pt.c:1527:17
  Uninitialized value was stored to memory at
    #0 0x5581c005ddf8 in intel_pt_walk_insn tools/perf/util/intel-pt-decoder/intel-pt-decoder.c:1256:25

The op value is used to set branch flags for branch instructions
encountered when walking the code, so fix by setting op to
INTEL_PT_OP_OTHER in other cases.

Fixes: 4c761d805b ("perf intel-pt: Fix intel_pt_fup_event() assumptions about setting state type")
Reported-by: Ian Rogers <irogers@google.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Closes: https://lore.kernel.org/linux-perf-users/20240320162619.1272015-1-irogers@google.com/
Link: https://lore.kernel.org/r/20240326083223.10883-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-06-12 11:12:23 +02:00
..
Build x86/insn: Use get_unaligned() instead of memcpy() 2021-10-06 11:56:37 +02:00
intel-pt-decoder.c perf intel-pt: Fix unassigned instruction op (discovered by MemorySanitizer) 2024-06-12 11:12:23 +02:00
intel-pt-decoder.h perf intel-pt: Add support for emulated ptwrite 2022-05-17 11:55:49 -03:00
intel-pt-insn-decoder.c perf intel-pt: Add support for new branch instructions ERETS and ERETU 2023-03-20 19:25:40 -03:00
intel-pt-insn-decoder.h perf intel-pt: Add support for new branch instructions ERETS and ERETU 2023-03-20 19:25:40 -03:00
intel-pt-log.c perf intel-pt: Remove first line of log dumped on error 2022-10-04 08:55:21 -03:00
intel-pt-log.h perf intel-pt: Support itrace option flag d+e to log on error 2022-10-04 08:55:21 -03:00
intel-pt-pkt-decoder.c tools: Rename __fallthrough to fallthrough 2023-04-06 21:41:00 -03:00
intel-pt-pkt-decoder.h perf intel-pt: pkt-decoder: Add CFE and EVD packets 2022-02-15 17:05:44 -03:00