From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5C49337DE8D; Tue, 21 Jul 2026 20:19:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784665184; cv=none; b=LsnWgvf01qTLbAkk3uEOIKUoWgQJNWLC2Kv/6T68w1JwGJuqugiQ07vjCwXVUy/8bxtBnC5I++GFL68fIwv0rZaWomjgU0XM2Z0b+RZ2/Ecu1+1wS9/A3GzoHRFQJgROINUJmInKVTvGM3UaNE+SGUaLDzPh8UIpNLcA38Sunhw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784665184; c=relaxed/simple; bh=SNC3GdHsVhsqc02mWRcOIn752/BX3DmQadzICnaycAA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XNeCOzPKkvocJu0aNIJ+POxChIAPyJWMkYgrVgA+uQI+fX/AVnEUmC5Om+KXyn26H5YrRTZpbSnAxPzXRId89y+o+Rm2eYy/FT/0DBikVt87iT2ULzI5BSc4mdoBiAbx/prJvxFF02Ii51870pX+GHWJJyyKtK6XRYwRA3DjsAM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=VbJPGTAY; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="VbJPGTAY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7D38D1F000E9; Tue, 21 Jul 2026 20:19:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784665183; bh=5k+uFh7aaKSHDaYEM6ApucvpGYImGZdoj1gwj6iZrp4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=VbJPGTAYenoxedUSY8Rv1wGlFxwc/j8eTlejt1Eyv1/RtgBPj7w16UsTAXHpWePg1 ReLpCgvcID+GO5X6Id4qXwnckzhuKxH5EcJ7hheuFzzp2mnKM0A+/Q7ywYhOudrYvn 12fTK9sdHLhmAlRnu8T3oGUhBlkmtd++1416a8CY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, WenTao Liang , Thomas Gleixner , Frederic Weisbecker Subject: [PATCH 6.6 0208/1266] posix-cpu-timers: Fix pid refcount leak in do_cpu_nanosleep() error path Date: Tue, 21 Jul 2026 17:10:45 +0200 Message-ID: <20260721152446.468680796@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152441.786066624@linuxfoundation.org> References: <20260721152441.786066624@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: WenTao Liang commit 87bd2ad568e15b90d5f7d4bcd70342d05dad649c upstream. In do_cpu_nanosleep(), posix_cpu_timer_create() takes a pid reference via get_pid() and stores it in timer.it.cpu.pid. If the subsequent posix_cpu_timer_set() call fails, the function returns immediately without calling posix_cpu_timer_del() to release the pid reference, causing a leak. Fix it by calling posix_cpu_timer_del() before the unlock-and-return on the error path, consistent with the other exit paths in the same function. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: WenTao Liang Signed-off-by: Thomas Gleixner Reviewed-by: Frederic Weisbecker Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260611161738.97043-1-vulab@iscas.ac.cn Signed-off-by: Greg Kroah-Hartman --- kernel/time/posix-cpu-timers.c | 1 + 1 file changed, 1 insertion(+) --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -1535,6 +1535,7 @@ static int do_cpu_nanosleep(const clocki spin_lock_irq(&timer.it_lock); error = posix_cpu_timer_set(&timer, flags, &it, NULL); if (error) { + posix_cpu_timer_del(&timer); spin_unlock_irq(&timer.it_lock); return error; }