perf bpf: Add NULL check for btf__type_by_id() in synthesize_bpf_prog_name()

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synthesize_bpf_prog_name() calls btf__type_by_id() and immediately
dereferences the result via t->name_off without checking for NULL.
btf__type_by_id() returns NULL when the type_id is invalid or out
of range.  When processing perf.data files, finfo->type_id comes from
untrusted input, so an invalid ID causes a NULL pointer dereference.

Fix by checking t for NULL before dereferencing.

Reported-by: sashiko-bot <sashiko-bot@kernel.org>
Fixes: fc462ac75b ("perf bpf: Extract logic to create program names from perf_event__synthesize_one_bpf_prog()")
Cc: Song Liu <songliubraving@fb.com>
Assisted-by: Claude:claude-opus-4.6
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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Arnaldo Carvalho de Melo 2026-06-08 08:10:43 -03:00

parent fd1f70776a

commit 903b0526dc

1 changed files with 2 additions and 1 deletions

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tools/perf/util/bpf-event.c

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