* [jimc:dd-shrink-6a5] [dyndbg] a2f8b47e22: WARNING:suspicious_RCU_usage
@ 2025-10-27 6:45 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-10-27 6:45 UTC (permalink / raw)
To: Jim Cromie, Łukasz Bartosik; +Cc: oe-lkp, lkp, oliver.sang
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 <oliver.sang@intel.com>
| 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] <TASK>
[ 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] </TASK>
[ 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] <TASK>
[ 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] </TASK>
[ 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
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2025-10-27 6:45 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-10-27 6:45 [jimc:dd-shrink-6a5] [dyndbg] a2f8b47e22: WARNING:suspicious_RCU_usage kernel test robot
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.