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Thu, 23 Apr 2026 00:00:50 -0700 (PDT) Received: from localhost ([172.216.252.33]) by smtp.gmail.com with ESMTPSA id 00721157ae682-7bb005abc7asm29906347b3.38.2026.04.23.00.00.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Apr 2026 00:00:48 -0700 (PDT) Date: Thu, 23 Apr 2026 10:00:41 +0300 From: Dan Carpenter To: Ian Rogers Cc: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Adrian Hunter , James Clark , Guo Ren , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH] perf dwarf-regs: Fix off by one in __get_dwarf_regnum_for_perf_regnum_csky() Message-ID: Precedence: bulk X-Mailing-List: linux-csky@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Mailer: git-send-email haha only kidding Change the > comparison >= to prevent an out of bounds access of the dwarf_csky_regnumsp[] array. Fixes: 8cac4013b0c2 ("perf dwarf-regs: Add csky perf to dwarf register number mapping functions") Signed-off-by: Dan Carpenter --- --- tools/perf/util/dwarf-regs-arch/dwarf-regs-csky.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/dwarf-regs-arch/dwarf-regs-csky.c b/tools/perf/util/dwarf-regs-arch/dwarf-regs-csky.c index cb44b774f8d9..4c586a5cb763 100644 --- a/tools/perf/util/dwarf-regs-arch/dwarf-regs-csky.c +++ b/tools/perf/util/dwarf-regs-arch/dwarf-regs-csky.c @@ -118,7 +118,7 @@ int __get_dwarf_regnum_for_perf_regnum_csky(int perf_regnum, unsigned int flags) if (flags & EF_CSKY_ABIV2) idx++; - if (perf_regnum < 0 || perf_regnum > (int)ARRAY_SIZE(dwarf_csky_regnums) || + if (perf_regnum < 0 || perf_regnum >= (int)ARRAY_SIZE(dwarf_csky_regnums) || dwarf_csky_regnums[perf_regnum][idx] == 0) return -ENOENT; -- 2.53.0