rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5818/1:b..l rcu: (detected by 1, t=10503 jiffies, g=58505, q=735281 ncpus=2) task:syz-executor state:R running task stack:23048 pid:5818 tgid:5818 ppid:1 task_flags:0x40054c flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5396 [inline] __schedule+0x116a/0x5de0 kernel/sched/core.c:6785 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7108 irqentry_exit+0x36/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_release+0x183/0x2f0 kernel/locking/lockdep.c:5896 Code: 0f c1 05 48 aa 34 12 83 f8 01 0f 85 1d 01 00 00 9c 58 f6 c4 02 0f 85 08 01 00 00 41 f7 c5 00 02 00 00 74 01 fb 48 8b 44 24 10 <65> 48 2b 05 5d 68 34 12 0f 85 58 01 00 00 48 83 c4 18 5b 41 5c 41 RSP: 0018:ffffc9000400f390 EFLAGS: 00000206 RAX: 6d1d145c6ae61000 RBX: ffffffff8e5c4940 RCX: ffffc9000400f39c RDX: 0000000000000002 RSI: ffffffff8ddf51e3 RDI: ffffffff8c157da0 RBP: 00007f5d945c11e5 R08: 602c7918ca93faf6 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff81a6b964 R13: 0000000000000206 R14: ffff888033a28000 R15: 0000000000000003 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] is_module_text_address+0x149/0x230 kernel/module/main.c:3817 kernel_text_address kernel/extable.c:119 [inline] kernel_text_address+0x81/0x100 kernel/extable.c:94 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x59/0xa0 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xa6/0x100 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2381 [inline] slab_free mm/slub.c:4643 [inline] kmem_cache_free+0x2d1/0x4d0 mm/slub.c:4745 anon_vma_chain_free mm/rmap.c:147 [inline] unlink_anon_vmas+0x173/0x820 mm/rmap.c:421 free_pgtables+0x1ca/0xcb0 mm/memory.c:381 exit_mmap+0x3fb/0xb90 mm/mmap.c:1295 __mmput+0x12a/0x410 kernel/fork.c:1121 mmput+0x62/0x70 kernel/fork.c:1144 exit_mm kernel/exit.c:581 [inline] do_exit+0x7c4/0x2bd0 kernel/exit.c:952 do_group_exit+0xd3/0x2a0 kernel/exit.c:1105 get_signal+0x2673/0x26d0 kernel/signal.c:3034 arch_do_signal_or_restart+0x8f/0x7d0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:111 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5d945c11e5 RSP: 002b:00007ffe413935c0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: 0000000000000000 RBX: 00000000000005b3 RCX: 00007f5d945c11e5 RDX: 00007ffe41393600 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffe4139366c R08: 0000000000000000 R09: 00007f5d9531c000 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000002b4 R13: 00000000000927c0 R14: 000000000007a3e1 R15: 00007ffe413936c0