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 1DAD8367B63; Tue, 21 Jul 2026 22:34:03 +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=1784673244; cv=none; b=QUeFHODTnnZ36o3eTeS2l0BE0PM41dA/ZfSXVFIJR/9tcvM5OzomsDO/N/i9nYJ8G8zhAAvuR7miZB9+Gbe1N3KNeta+xNTwx8V5H7DeUTYwZ0Do3Z1zCeHRKKYjEfQZ0JbD7U6U9H/6UXShBoc7J5RTw9rHxOy5Matw+t37j3k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784673244; c=relaxed/simple; bh=z3KyTEUM0cjXqal2tTszVXyoAavr6QVWAv/7p7H0YSQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QRuupLGXzGfJzwDGUklXP48KwU3AMOzIkjOZ/jnblg+MHFuEj5PpjSpiM1XnJaV88e1EablqzLnw/pIdZ4yUnghSdofgnenPqwVRP3v6XPIq5nNDsf0qI++iRmtsdxJXVe00B5Nyoo/1UxhckbwpeoAs0WjmMxQiNHNRrLoYk9Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=WCtymZkZ; 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="WCtymZkZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 835F61F000E9; Tue, 21 Jul 2026 22:34:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784673243; bh=mB4GKXbqk9X2sSis6YO9xpVuEFTgHLLL0tcg3n8ghNo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=WCtymZkZYMYQShyWsZYLcliJNOHCre3gtD47o0Yfjl9IuY5+7tHXgEJpYHLWiZ2xW sJa6vsFcC9USyUnLfWa+LyFtpfVCYr5OjoxlfPrtJJ/x5t7tyIHu0XzPtrKGIQLKMp dW4AhEvt5zfkSAQB+rg9ppBS0suvgifp7ZMLdjzI= 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 5.10 090/699] posix-cpu-timers: Fix pid refcount leak in do_cpu_nanosleep() error path Date: Tue, 21 Jul 2026 17:17:29 +0200 Message-ID: <20260721152357.732444395@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152355.667394603@linuxfoundation.org> References: <20260721152355.667394603@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 5.10-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 @@ -1472,6 +1472,7 @@ 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; }