rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P19779/1:b..l..
rcu: 	(detected by 1, t=10503 jiffies, g=127245, q=1233 ncpus=2)
task:syz.7.2837      state:R  running task     stack:25576 pid:19779 tgid:19779 ppid:18229  task_flags:0x40044c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5830 kernel/sched/core.c:7382
 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
 irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:kasan_check_range+0x5/0x2c0 mm/kasan/generic.c:199
Code: e8 80 52 e8 fe 90 0f 0b cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 55 <41> 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 ae 01 00 00 4c 8d
RSP: 0018:ffffc90005f97270 EFLAGS: 00000246
RAX: ffffc90005f977e0 RBX: 0000000000000010 RCX: ffffffff81788604
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc90005f97398
RBP: 0000000000000000 R08: ffffc90005f977e0 R09: 0000000000000000
R10: ffffc90005f97398 R11: ffffffff81b3ad40 R12: dffffc0000000000
R13: ffffffff9264c272 R14: ffffc90005f97398 R15: ffffc90005f97390
 __asan_memset+0x22/0x50 mm/kasan/shadow.c:84
 unwind_next_frame+0xd04/0x2550 arch/x86/kernel/unwind_orc.c:621
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:409 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:426
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x31c/0x600 mm/slub.c:5680
 _kmalloc_noprof include/linux/slab.h:991 [inline]
 slab_free_hook mm/slub.c:2732 [inline]
 slab_free mm/slub.c:6630 [inline]
 kmem_cache_free+0x156/0x650 mm/slub.c:6757
 tear_down_vmas+0x31f/0x530 mm/mmap.c:1277
 exit_mmap+0x4ca/0xa40 mm/mmap.c:1335
 __mmput+0x118/0x420 kernel/fork.c:1192
 exit_mm+0x18e/0x240 kernel/exit.c:586
 do_exit+0x6a8/0x2360 kernel/exit.c:967
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1123
 get_signal+0x1216/0x12c0 kernel/signal.c:3112
 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
 do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa23159f559
RSP: 002b:00007fff2601d1d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffff92 RBX: 000000000011ef1c RCX: 00007fa23159f559
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa231825fac
RBP: 0000000000000fd2 R08: 3fffffffffffffff R09: 0000000000000000
R10: 00007fff2601d2e0 R11: 0000000000000246 R12: 00007fff2601d300
R13: 00007fa231825fac R14: 000000000011feee R15: 00007fff2601d2e0
 </TASK>