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Sun, 08 Mar 2026 22:57:21 -0700 (PDT) From: Qing Wang To: syzbot+196a82fd904572696b3c@syzkaller.appspotmail.com Cc: acme@kernel.org, adrian.hunter@intel.com, alexander.shishkin@linux.intel.com, irogers@google.com, james.clark@linaro.org, jolsa@kernel.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, mark.rutland@arm.com, mingo@redhat.com, namhyung@kernel.org, peterz@infradead.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [perf?] possible deadlock in refcount_dec_and_mutex_lock (2) Date: Mon, 9 Mar 2026 13:57:13 +0800 Message-Id: <20260309055713.1938024-1-wangqing7171@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <69abcb61.050a0220.13f275.0040.GAE@google.com> References: <69abcb61.050a0220.13f275.0040.GAE@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit #syz test diff --git a/kernel/events/core.c b/kernel/events/core.c index 1f5699b339ec..accf23545d78 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -7485,9 +7485,12 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma) */ ret = map_range(event->rb, vma); if (ret) - perf_mmap_close(vma); + goto out_close; } + return ret; +out_close: + perf_mmap_close(vma); return ret; }