From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) (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 3FCAC3C9EF8 for ; Wed, 8 Apr 2026 13:05:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.12 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775653516; cv=none; b=fZSgOmOgV4wHJCEpaJV+DKJbzZjMttrOracMyNedUMwSEjuOS4Xoqq9RyLqzWYox55ZKIe99Oy/f6hzhRz5fBtBOY90kipbDd0zRKNv12P8S1GGYGXq+4aibkhsZmcqW2NZy0XKg7FKBsughljgLXFxIyxmIPOSYnCoKiKWKz9w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775653516; c=relaxed/simple; bh=pAbATCU4UWxYks/mUscPF2GEd5MYcJq6ho3VNOqddCA=; h=Date:From:To:Cc:Subject:Message-ID; b=Vhsf3Cbu92bG7Z8kT+iigGOUyvo7Hwzn6vzR0Xjo9ObPA2f6YtaiyWWcTc3kBsuG9tt6DnGHv+MkZA01NjwiZWv85GPqFMW7SUQmOKWF685wpWkGxoymTY4P/4cvQCMdf9ydq4xd2fEbU+pwSAJKuogOavpVOrcRU48IIiFGVZQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=cz/nPih/; arc=none smtp.client-ip=192.198.163.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="cz/nPih/" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1775653514; x=1807189514; h=date:from:to:cc:subject:message-id; bh=pAbATCU4UWxYks/mUscPF2GEd5MYcJq6ho3VNOqddCA=; b=cz/nPih/JElEXKxV5A0JzguVUf8wyBKLV6RBPsukp76TD9xntQG7r4qw e4hF/2DsHzk8sZELwSb8nhmgHJYgVmYNwjroPON4u5tf70tD+jGIBprQ+ Qxrl8rFz0+TMeHMi0mIrnUzh4zgzRs9SLKXtRIymqolrlScR8P8+K86Nl CG5vMMHwL+dn4dn16SHFS9DV8Bf8FpdQdIEy+uvREg1Qtg5PsIiCpRqin 0Q1GWWoNyqVl/YnEFfL/sD4AkUYk0kJ869GD3EcA3TRgiEnK7JdXrWS2x 6nMIebVIqxhruLoB250RwPJ5fGydIwS8ntjZ9MyNTIF2U1VKEZ109FhAQ A==; X-CSE-ConnectionGUID: 7BHVB/WySIeYOtRY0MLJGA== X-CSE-MsgGUID: 69LCKuHyTx2VTzV4ttHt6A== X-IronPort-AV: E=McAfee;i="6800,10657,11752"; a="80522263" X-IronPort-AV: E=Sophos;i="6.23,167,1770624000"; d="scan'208";a="80522263" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Apr 2026 06:05:01 -0700 X-CSE-ConnectionGUID: anxtQgIASZ+0+GW/SeJYiA== X-CSE-MsgGUID: Qndmrv21S66HXpx6Hxg17w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,167,1770624000"; d="scan'208";a="266453555" Received: from lkp-server01.sh.intel.com (HELO d00eb8a6782a) ([10.239.97.150]) by orviesa001.jf.intel.com with ESMTP; 08 Apr 2026 06:05:00 -0700 Received: from kbuild by d00eb8a6782a with local (Exim 4.98.2) (envelope-from ) id 1wASaW-000000001qb-3hTK; Wed, 08 Apr 2026 13:04:56 +0000 Date: Wed, 08 Apr 2026 21:04:18 +0800 From: kernel test robot To: cros-kernel-buildreports@googlegroups.com Cc: oe-kbuild-all@lists.linux.dev Subject: [android-common:android12-5.10-2025-12 0/1] kernel/sched/psi.c:1147:6: warning: no previous prototype for 'psi_trigger_destroy' Message-ID: <202604082001.sdkFC8LG-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild-all@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Hi Suren, FYI, the error/warning still remains. tree: https://android.googlesource.com/kernel/common android12-5.10-2025-12 head: 730d06ec05ff5dc34389ff99ea4009411efba5e6 commit: d4e4e61d4a5b87bfc9953c306a11d35d869417fd [0/1] psi: Fix uaf issue when psi trigger is destroyed while being polled config: i386-buildonly-randconfig-003-20260408 (https://download.01.org/0day-ci/archive/20260408/202604082001.sdkFC8LG-lkp@intel.com/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260408/202604082001.sdkFC8LG-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202604082001.sdkFC8LG-lkp@intel.com/ All warnings (new ones prefixed by >>): kernel/sched/psi.c:1077:21: warning: no previous prototype for 'psi_trigger_create' [-Wmissing-prototypes] 1077 | struct psi_trigger *psi_trigger_create(struct psi_group *group, | ^~~~~~~~~~~~~~~~~~ >> kernel/sched/psi.c:1147:6: warning: no previous prototype for 'psi_trigger_destroy' [-Wmissing-prototypes] 1147 | void psi_trigger_destroy(struct psi_trigger *t) | ^~~~~~~~~~~~~~~~~~~ kernel/sched/psi.c:1214:10: warning: no previous prototype for 'psi_trigger_poll' [-Wmissing-prototypes] 1214 | __poll_t psi_trigger_poll(void **trigger_ptr, | ^~~~~~~~~~~~~~~~ kernel/sched/psi.c:1329:30: warning: 'psi_cpu_proc_ops' defined but not used [-Wunused-const-variable=] 1329 | static const struct proc_ops psi_cpu_proc_ops = { | ^~~~~~~~~~~~~~~~ kernel/sched/psi.c:1320:30: warning: 'psi_memory_proc_ops' defined but not used [-Wunused-const-variable=] 1320 | static const struct proc_ops psi_memory_proc_ops = { | ^~~~~~~~~~~~~~~~~~~ kernel/sched/psi.c:1311:30: warning: 'psi_io_proc_ops' defined but not used [-Wunused-const-variable=] 1311 | static const struct proc_ops psi_io_proc_ops = { | ^~~~~~~~~~~~~~~ vim +/psi_trigger_destroy +1147 kernel/sched/psi.c 1146 > 1147 void psi_trigger_destroy(struct psi_trigger *t) 1148 { 1149 struct psi_group *group; 1150 struct task_struct *task_to_destroy = NULL; 1151 1152 /* 1153 * We do not check psi_disabled since it might have been disabled after 1154 * the trigger got created. 1155 */ 1156 if (!t) 1157 return; 1158 1159 group = t->group; 1160 /* 1161 * Wakeup waiters to stop polling. Can happen if cgroup is deleted 1162 * from under a polling process. 1163 */ 1164 wake_up_interruptible(&t->event_wait); 1165 1166 mutex_lock(&group->trigger_lock); 1167 1168 if (!list_empty(&t->node)) { 1169 struct psi_trigger *tmp; 1170 u64 period = ULLONG_MAX; 1171 1172 list_del(&t->node); 1173 group->nr_triggers[t->state]--; 1174 if (!group->nr_triggers[t->state]) 1175 group->poll_states &= ~(1 << t->state); 1176 /* reset min update period for the remaining triggers */ 1177 list_for_each_entry(tmp, &group->triggers, node) 1178 period = min(period, div_u64(tmp->win.size, 1179 UPDATES_PER_WINDOW)); 1180 group->poll_min_period = period; 1181 /* Destroy poll_task when the last trigger is destroyed */ 1182 if (group->poll_states == 0) { 1183 group->polling_until = 0; 1184 task_to_destroy = rcu_dereference_protected( 1185 group->poll_task, 1186 lockdep_is_held(&group->trigger_lock)); 1187 rcu_assign_pointer(group->poll_task, NULL); 1188 del_timer(&group->poll_timer); 1189 } 1190 } 1191 1192 mutex_unlock(&group->trigger_lock); 1193 1194 /* 1195 * Wait for psi_schedule_poll_work RCU to complete its read-side 1196 * critical section before destroying the trigger and optionally the 1197 * poll_task. 1198 */ 1199 synchronize_rcu(); 1200 /* 1201 * Stop kthread 'psimon' after releasing trigger_lock to prevent a 1202 * deadlock while waiting for psi_poll_work to acquire trigger_lock 1203 */ 1204 if (task_to_destroy) { 1205 /* 1206 * After the RCU grace period has expired, the worker 1207 * can no longer be found through group->poll_task. 1208 */ 1209 kthread_stop(task_to_destroy); 1210 } 1211 kfree(t); 1212 } 1213 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki