From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f67.google.com (mail-wm1-f67.google.com [209.85.128.67]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0352A34E777 for ; Mon, 9 Mar 2026 06:22:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.67 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773037357; cv=none; b=j4rfYMTYxC7Pjp/AoNp+/h4iHkLbRq2CQPIde4B0zq73Ilp3AOiN+ScY+HeoZIs9R63AF9+okHOO1vOhigy0dIy8m6XfLbDSSgUzySUEdzxRutIXrotF/nkVYfTLc7OjoFZ+FjpBFfB/POEge+yciIroNdMkT5gR0crXxRQBns4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773037357; c=relaxed/simple; bh=J1k9UOU9t2vj5G2Miybcyl4KTUi8RAuMeOfnz5qb040=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=KJbrLdeILhH8aWTrn+AAYuCtHzz4W/jHN2Zk7DGScDQT5fJXddsIY8q+x2BJm4FpaYeohxlt6acVvZQhI007MRB6Mr6k4ub+Q8ybMe6dfYSTx7CE7HY6v5ridpFfZPNFwJL2PqtAe0vXY1Kz/0Whf522gB8Ma/0IHX4qX6dmWfc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=aACFid5/; arc=none smtp.client-ip=209.85.128.67 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="aACFid5/" Received: by mail-wm1-f67.google.com with SMTP id 5b1f17b1804b1-4852a9c6309so18311135e9.0 for ; Sun, 08 Mar 2026 23:22:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1773037354; x=1773642154; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=yLGw6ZON/rxrjKmR009dp4Y/2IkAESkky6tFW0VcKuo=; b=aACFid5/nYaZfvUlfhGfQTdP0yp1SMp2dzbaIfGLmKB52ipttQh+V0iidfwpanvdhF oj9UWl4h0oUS/cpWpfdurCymGTm04WeQJvawo9XsUsaqzMDAakEarMPLnm7nv+1q5JZk d0r9lIqmX2qXI7TZGgcj5b1FAB9YIJ2bT2yBEn/GjenAQ47QR5CHq8TCqJQKi47lX3J+ 4RJ1faZoQGrdlPpGc15AQBLhncVPm4+SNho51tVsdhLb7uLUMl7JJXYT+jCVXkIDNAbk gmvmjcKn1xZJyaHuSxaF+k14gzLYoJFuxV5DaMw3WBoruhKUAi19e4GyHX6Qb8V2XgkK cQtQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1773037354; x=1773642154; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=yLGw6ZON/rxrjKmR009dp4Y/2IkAESkky6tFW0VcKuo=; b=I81WyV5x1bXOa/YveDIPxadMUU0ga3xyt3TY/Ut+c2bBpXLCsC4WiJE5kQw3uw0R+D 5BH8miYIH8HbpgIb5GwA+3tQoT3QEebbj3HQq2ZjIebim/M7pu8+7o/qFrE3ohlUY8JU ce6vnGWQdVHdpUCTChIsxUAjK6cRnxCtjMPQwNp64aI+KU9gzA1O7QkFhi0Bd6+S2JYM Lp9LxVOkIqjzvA/1NJsITlZWGsEa4J7RhB4LIJszcz+3W3kBBlv8NZ5UzaDk2qlkL2de oTlF7KJXg/hGOtrSv878CYUvx+2hEHSp1MgQtpolrAUK87tQ/pJSWX3DvtOKCrU+0zxu NskA== X-Forwarded-Encrypted: i=1; AJvYcCWz83EXPJXu//oQ4cjoWlychgsid9Mvm5tDeslSBWCsLDp5NJ/zcb/FQDBF9Ldpe6eNsbFtYlCQxwswBHY=@vger.kernel.org X-Gm-Message-State: AOJu0YybwM0uKLqGfgjsGuS0iy/m6khePKJbvR0C/G76kl3NA+Lr0u5m 0eXFq0F0qblM6OndH2DGwfm+MOIyG0K9NCP2ZLPclri7HoRFZUY1Ggpr X-Gm-Gg: ATEYQzyauY6tomoDNS5V2fS+2n6Ur3ppA7nieWuPvUtq5rfuH9v7cKq9Z0lQ8PPjGkv ILge1BY1i0Qo+6eCNDrMiz39drDiech5BtlhCedrcdGvD9ewIzWk/GgCI9yw9bb8PyTOl3xtSO5 tQ18TJhGgpj+chr/gxx96YLOlPZnAbpwVRUyz/pgOgnHzYY9NwTTJyieB2aIpvv2Ud80X47Hc4v kIwNb9gzTTwAAHa71plN4cLpdNQHURVUIgQBWLtpUGZy6XXWcstmzCUokyI60DOsD99aeRYmLt5 y/wDl3eIgn97ivG4SpCkgSj6oOlhZdn1P7xxuh5brrNLDYFUUd3y0fWY+6vZ1CUlhTaJ3kqd4x1 A83IleGTYDRneIyYAaUfaIj+LoeB+Xmqap1P2rtzoAvQ2H20xri/ZLJb794JJd9bKMjMtuyyDsn HronH/oLyB7yHpjZKO3ZO7ARZaMaFvTCjZc80Jg4u41g6xnzYxcTIa3cz/SLuH X-Received: by 2002:a05:600c:46cb:b0:485:3dfc:57c with SMTP id 5b1f17b1804b1-4853dfc073cmr12575155e9.21.1773037354166; Sun, 08 Mar 2026 23:22:34 -0700 (PDT) Received: from lima-ubuntu.hz.ali.com ([47.246.98.213]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48539e574b5sm85442615e9.8.2026.03.08.23.22.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 08 Mar 2026 23:22:33 -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 14:22:23 +0800 Message-Id: <20260309062223.1953399-1-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..e5ce03ce926d 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 0; +out_close: + perf_mmap_close(vma); return ret; }