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| author | Ian Rogers <irogers@google.com> | 2023-10-09 11:39:11 -0700 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2023-10-12 10:01:56 -0700 |
| commit | 52a5ad12f2147506899ee83e680ea2a1d763adeb (patch) | |
| tree | a8691f5434924f2251e136779eaf2ac60b4c62bd | |
| parent | 85f73c377b2ac9988a204b119aebb33ca5c60083 (diff) | |
| download | linux-52a5ad12f2147506899ee83e680ea2a1d763adeb.tar.gz linux-52a5ad12f2147506899ee83e680ea2a1d763adeb.tar.bz2 linux-52a5ad12f2147506899ee83e680ea2a1d763adeb.zip | |
perf dlfilter: Be defensive against potential NULL dereference
In the unlikely case of having a symbol without a mapping, avoid a
NULL dereference that clang-tidy warns about.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: llvm@lists.linux.dev
Cc: Ming Wang <wangming01@loongson.cn>
Cc: Tom Rix <trix@redhat.com>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20231009183920.200859-11-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
| -rw-r--r-- | tools/perf/util/dlfilter.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/util/dlfilter.c b/tools/perf/util/dlfilter.c index 1dbf27822ee2..5e54832137a9 100644 --- a/tools/perf/util/dlfilter.c +++ b/tools/perf/util/dlfilter.c @@ -52,8 +52,10 @@ static void al_to_d_al(struct addr_location *al, struct perf_dlfilter_al *d_al) d_al->sym_end = sym->end; if (al->addr < sym->end) d_al->symoff = al->addr - sym->start; - else + else if (al->map) d_al->symoff = al->addr - map__start(al->map) - sym->start; + else + d_al->symoff = 0; d_al->sym_binding = sym->binding; } else { d_al->sym = NULL; |