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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?SM+LzC5j3NhABwV2AGV38+ILeQs+FeDg4LtDc14XlM8ePDgzYXtTOjb4RE75?= =?us-ascii?Q?Ge8+Y2zwKLBXaIXNgjAZQz2Pi6OZJ5qTj3js6aJCMty3cia875vqGi+80tyz?= =?us-ascii?Q?EjJ9T7O8shK8N4/w0a3jwGWnNNIEiXCGUnWeb7k6UsvMAcY71thIVDRv/KrJ?= =?us-ascii?Q?d9YN2H2yHWDy4HButWGDHptt/GWLgC5vWkB1tpk1lbpffstQ/PvXJM/KdsO2?= =?us-ascii?Q?ehARGuYmdhUEjCDItay/duITU4uy5wcM+ESljKG9gCgPPRcZ4NCu6ouAZGxd?= =?us-ascii?Q?3kxBB9eL2GQ0PJO0jQEsctc8PKkSERuF9pR6V3FhzhFwkATb6gRPPYJrk6sj?= =?us-ascii?Q?r1TYDMoWHQhkgGDD7dyOvuP37QqBT1/+/Pmy5xKXK/7OzONglAfuDOY1cDhE?= =?us-ascii?Q?b8sTbo7iTHIawnEMcDoFwXTno4kV6aA9IHx2rHv2Sl40M5glC1qjTZpAKWXD?= =?us-ascii?Q?aVxrsLqwBFM9xCWBtaZ8MvtY1DfI2H5ZglHj+udss4Ptwsrn2xVsH8h5sCVg?= =?us-ascii?Q?UoHQ7n2ka6Cdj/ZeLKEXLA817fuFM1b2z4QqQdtu0RoPLkNxAKeYaaA3NlDx?= =?us-ascii?Q?jmpt5O9Bfaw68eFcgdQeT17M0qgrAJI0n6OMM16umoXuQ5DoDXMgvHdOmOZQ?= =?us-ascii?Q?/EsJdaU0QbTFMovWKbNh3+wUErWSbNe6QzrIDSSBC7It3zZ01Y261YaTFB0T?= =?us-ascii?Q?OZwTxgXAMxR3We8l5scTGysxOC1mvzQOGZiN3df80BVlxs7ra7IP1H+EsX2r?= =?us-ascii?Q?a7pPOJShuD2cmdLoRV3ZDI2Kx5KC6wBZQ3DeCqiu5fpJCMjGFP2bGXh3Fxv6?= =?us-ascii?Q?DsHq1BwZG1oUYYEInRn8s/2Q72EyEJQwl7bQftBUVR1MdNWIyczYYfvCnRgB?= =?us-ascii?Q?Dkjj403lyoSsCLjbvNVqmW/I9tCKDXwAM+C6U/fI5XJdp4gEvb0obB53w4Kh?= =?us-ascii?Q?R2yDkI9idGp92++RCP3AZDYbr9rkr8MnUxSR8+Z/Vak5gc78YuHkRX/OYksG?= =?us-ascii?Q?ZVTdo5tboS4RRFJ47I1kbhXxnf4HNcqwUoBWSaPqel2vGcKrh4WuAP4PmMvu?= =?us-ascii?Q?t8gEAVa2ynPHXUZs7akANzuxYyCCacE2greknJRKYxbhEqFPLVBBcXnkEMST?= =?us-ascii?Q?QvRyXBmXHocCEA5+XC7gyErFUKzT88k37YnzuZwQvJ4hqwGZOEZXMBhmww2b?= =?us-ascii?Q?e2CUv/L12RT93i0LhX9SZibCCAqmdoCpr1UzBKm0wHqVUMv2zgAVaUmxm+wG?= =?us-ascii?Q?Vdv7+2OSGTynA3LwCoIveo2Tr6J5gxeLXsKBW6YpZ/i/ovWdDtpt8meQ4Rdp?= =?us-ascii?Q?B8OWyfGe6r7xcpISM2Msy7AfZAtH+UhzaxBgUgLU/vJYkrbmZtjpfMTTSkEP?= =?us-ascii?Q?1kJihV/XVUT80fg7aY41wuUAzkmCxD9RlL5p/UUWmkEotPLMRC4ESFdw1Cz9?= =?us-ascii?Q?4EQMUds1wxW6xXVsRNn0qNx2LtBztSTgFB0C0CK5r0VQpuJcT6AG2Y5Nk/Fb?= =?us-ascii?Q?tlW/9be2Gjoh1TKEUb/ZUnw5/KRJJpB15jCArY2GLs7WDrFrx0tt6FvR4ylT?= =?us-ascii?Q?0V8m2UwVzsI6QVyUkqWRkXiHc1K4sLTvlUTk8oztLeQ3+lYuK5DDUNqtWXEf?= =?us-ascii?Q?tQ=3D=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: 899cdaba-1513-4290-6f0e-08de15246c3b X-MS-Exchange-CrossTenant-AuthSource: LV3PR11MB8603.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Oct 2025 06:45:33.6453 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: R8EMzNJqW1HW/4SxI5ulY1nuo2V4nXKCBXZBk2FK1uH4iQ5iskEkFmLi4fQK7dv6lDQWLO6sNeLgLKtpnGNi/w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR11MB7755 X-OriginatorOrg: intel.com Hello, kernel test robot noticed "WARNING:suspicious_RCU_usage" on: commit: a2f8b47e22fa6a1a9852e392166bc9adf45cc17d ("dyndbg: simplify dynamic_debug_init()") https://github.com/jimc/linux.git dd-shrink-6a5 in testcase: trinity version: with following parameters: runtime: 300s group: group-00 nr_groups: 5 config: x86_64-randconfig-075-20251025 compiler: gcc-14 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) +-----------------------------------------------------------+------------+------------+ | | 9d3aabecbe | a2f8b47e22 | +-----------------------------------------------------------+------------+------------+ | WARNING:suspicious_RCU_usage | 0 | 30 | | lib/maple_tree.c:#suspicious_rcu_dereference_check()usage | 0 | 30 | +-----------------------------------------------------------+------------+------------+ 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-lkp/202510271402.c48bc913-lkp@intel.com [ 23.695945][ T1] WARNING: suspicious RCU usage [ 23.705921][ T1] 6.17.0-00051-ga2f8b47e22fa #1 Not tainted [ 23.720195][ T1] ----------------------------- [ 23.729772][ T1] lib/maple_tree.c:844 suspicious rcu_dereference_check() usage! [ 23.741453][ T1] [ 23.741453][ T1] other info that might help us debug this: [ 23.741453][ T1] [ 23.753628][ T1] [ 23.753628][ T1] rcu_scheduler_active = 1, debug_locks = 1 [ 23.762172][ T1] no locks held by swapper/0/1. [ 23.770029][ T1] [ 23.770029][ T1] stack backtrace: [ 23.780966][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.17.0-00051-ga2f8b47e22fa #1 PREEMPTLAZY 38e889c81473e39d3110c5fb5596ce5e6e0e62d6 [ 23.781069][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 23.781124][ T1] Call Trace: [ 23.781165][ T1] [ 23.781254][ T1] dump_stack_lvl (lib/dump_stack.c:122) [ 23.781389][ T1] lockdep_rcu_suspicious.cold (kernel/locking/lockdep.c:6877) [ 23.781517][ T1] mas_start (lib/maple_tree.c:844 (discriminator 11) lib/maple_tree.c:1377 (discriminator 11)) [ 23.781654][ T1] mas_walk (lib/maple_tree.c:3629 lib/maple_tree.c:4939) [ 23.781840][ T1] mas_find (lib/maple_tree.c:6019 lib/maple_tree.c:6058) [ 23.781909][ T1] ? ddebug_store_range (lib/dynamic_debug.c:1510) [ 23.782009][ T1] dynamic_debug_init (lib/dynamic_debug.c:1914 (discriminator 1)) [ 23.782139][ T1] ? dynamic_debug_init_control (lib/dynamic_debug.c:1873) [ 23.782228][ T1] ? __lock_acquire (kernel/locking/lockdep.c:5237 (discriminator 1)) [ 23.782388][ T1] ? find_held_lock (kernel/locking/lockdep.c:5350 (discriminator 1)) [ 23.782432][ T1] ? add_device_randomness (drivers/char/random.c:944) [ 23.782552][ T1] ? add_device_randomness (drivers/char/random.c:944) [ 23.782618][ T1] ? __lock_release+0x54/0x160 [ 23.782691][ T1] ? rcu_is_watching (kernel/rcu/tree.c:752 (discriminator 3)) [ 23.782852][ T1] ? mix_pool_bytes (drivers/char/random.c:944) [ 23.782946][ T1] ? dynamic_debug_init_control (lib/dynamic_debug.c:1873) [ 23.783015][ T1] ? dynamic_debug_init_control (lib/dynamic_debug.c:1873) [ 23.783112][ T1] do_one_initcall (init/main.c:1270) [ 23.783200][ T1] ? __lock_release+0x54/0x160 [ 23.783271][ T1] ? trace_initcall_finish (init/main.c:1260) [ 23.783338][ T1] ? do_raw_spin_unlock (kernel/locking/spinlock_debug.c:103 (discriminator 4) kernel/locking/spinlock_debug.c:141 (discriminator 4)) [ 23.783459][ T1] ? _raw_spin_unlock (include/linux/spinlock_api_smp.h:143 (discriminator 3) kernel/locking/spinlock.c:186 (discriminator 3)) [ 23.783526][ T1] ? __register_sysctl_table (fs/proc/proc_sysctl.c:1413) [ 23.783596][ T1] ? queue_delayed_work_on (kernel/workqueue.c:2563 (discriminator 3)) [ 23.783755][ T1] kernel_init_freeable (init/main.c:1374 (discriminator 3) init/main.c:1568 (discriminator 3)) [ 23.783851][ T1] ? rest_init (init/main.c:1461) [ 23.783944][ T1] kernel_init (init/main.c:1471) [ 23.784012][ T1] ? rest_init (init/main.c:1461) [ 23.784080][ T1] ret_from_fork (arch/x86/kernel/process.c:154) [ 23.784174][ T1] ? rest_init (init/main.c:1461) [ 23.784269][ T1] ret_from_fork_asm (arch/x86/entry/entry_64.S:255) [ 23.784500][ T1] [ 23.784560][ T1] [ 24.143237][ T1] ============================= [ 24.149840][ T1] WARNING: suspicious RCU usage [ 24.159712][ T1] 6.17.0-00051-ga2f8b47e22fa #1 Not tainted [ 24.169961][ T1] ----------------------------- [ 24.179705][ T1] lib/maple_tree.c:800 suspicious rcu_dereference_check() usage! [ 24.191810][ T1] [ 24.191810][ T1] other info that might help us debug this: [ 24.191810][ T1] [ 24.203691][ T1] [ 24.203691][ T1] rcu_scheduler_active = 1, debug_locks = 1 [ 24.212003][ T1] no locks held by swapper/0/1. [ 24.219733][ T1] [ 24.219733][ T1] stack backtrace: [ 24.231089][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.17.0-00051-ga2f8b47e22fa #1 PREEMPTLAZY 38e889c81473e39d3110c5fb5596ce5e6e0e62d6 [ 24.231194][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.231251][ T1] Call Trace: [ 24.231292][ T1] [ 24.231381][ T1] dump_stack_lvl (lib/dump_stack.c:122) [ 24.231514][ T1] lockdep_rcu_suspicious.cold (kernel/locking/lockdep.c:6877) [ 24.231644][ T1] mtree_range_walk (lib/maple_tree.c:800 (discriminator 11) lib/maple_tree.c:2797 (discriminator 11)) [ 24.231874][ T1] mas_walk (lib/maple_tree.c:3636 lib/maple_tree.c:4939) [ 24.231971][ T1] mas_find (lib/maple_tree.c:6019 lib/maple_tree.c:6058) [ 24.232036][ T1] ? ddebug_store_range (lib/dynamic_debug.c:1510) [ 24.232134][ T1] dynamic_debug_init (lib/dynamic_debug.c:1914 (discriminator 1)) [ 24.232262][ T1] ? dynamic_debug_init_control (lib/dynamic_debug.c:1873) [ 24.232328][ T1] ? __lock_acquire (kernel/locking/lockdep.c:5237 (discriminator 1)) [ 24.232485][ T1] ? find_held_lock (kernel/locking/lockdep.c:5350 (discriminator 1)) [ 24.232525][ T1] ? add_device_randomness (drivers/char/random.c:944) [ 24.232623][ T1] ? add_device_randomness (drivers/char/random.c:944) [ 24.232710][ T1] ? __lock_release+0x54/0x160 [ 24.232783][ T1] ? rcu_is_watching (kernel/rcu/tree.c:752 (discriminator 3)) [ 24.232944][ T1] ? mix_pool_bytes (drivers/char/random.c:944) [ 24.233038][ T1] ? dynamic_debug_init_control (lib/dynamic_debug.c:1873) [ 24.233107][ T1] ? dynamic_debug_init_control (lib/dynamic_debug.c:1873) [ 24.233205][ T1] do_one_initcall (init/main.c:1270) [ 24.233293][ T1] ? __lock_release+0x54/0x160 [ 24.233364][ T1] ? trace_initcall_finish (init/main.c:1260) [ 24.233431][ T1] ? do_raw_spin_unlock (kernel/locking/spinlock_debug.c:103 (discriminator 4) kernel/locking/spinlock_debug.c:141 (discriminator 4)) [ 24.233551][ T1] ? _raw_spin_unlock (include/linux/spinlock_api_smp.h:143 (discriminator 3) kernel/locking/spinlock.c:186 (discriminator 3)) [ 24.233619][ T1] ? __register_sysctl_table (fs/proc/proc_sysctl.c:1413) [ 24.233692][ T1] ? queue_delayed_work_on (kernel/workqueue.c:2563 (discriminator 3)) [ 24.233852][ T1] kernel_init_freeable (init/main.c:1374 (discriminator 3) init/main.c:1568 (discriminator 3)) [ 24.233950][ T1] ? rest_init (init/main.c:1461) [ 24.234045][ T1] kernel_init (init/main.c:1471) [ 24.234113][ T1] ? rest_init (init/main.c:1461) [ 24.234203][ T1] ret_from_fork (arch/x86/kernel/process.c:154) [ 24.234299][ T1] ? rest_init (init/main.c:1461) [ 24.234398][ T1] ret_from_fork_asm (arch/x86/entry/entry_64.S:255) [ 24.234622][ T1] [ 24.591095][ T1] Must use shrinker_alloc() to dynamically allocate the shrinker The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20251027/202510271402.c48bc913-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki