rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7293/1:b..l P7288/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=30709, q=594 ncpus=2)
task:syz-executor.1  state:R  running task     stack:26048 pid:7288  tgid:7284  ppid:5108   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6745
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:pte_offset_map_nolock+0xde/0x1c0 mm/pgtable-generic.c:316
Code: 28 d8 b4 ff 49 8d 7f 28 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c5 00 00 00 4c 89 f2 49 8b 5f 28 <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 b5 00
RSP: 0018:ffffc900041af630 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffff88802e4d8060 RCX: ffffc90009842000
RDX: ffffc900041af7c8 RSI: ffffffff81d90d28 RDI: ffffea0000a40368
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff92000835ec6
R13: ffff88802900dab8 R14: ffffc900041af7c8 R15: ffffea0000a40340
 handle_pte_fault mm/memory.c:5366 [inline]
 __handle_mm_fault+0xbbe/0x53f0 mm/memory.c:5523
 handle_mm_fault+0x476/0xa00 mm/memory.c:5688
 do_user_addr_fault+0x2e5/0xe50 arch/x86/mm/fault.c:1389
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:__put_user_nocheck_4+0x7/0x20 arch/x86/lib/putuser.S:97
Code: d9 0f 01 cb 89 01 31 c9 0f 01 ca c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 01 cb <89> 01 31 c9 0f 01 ca c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00
RSP: 0018:ffffc900041af9d8 EFLAGS: 00050246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000020157030
RDX: 0000000000040000 RSI: ffffffff88b96c8a RDI: 0000000000000005
RBP: ffffc900041afd98 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000020157000 R14: ffffc900041afddc R15: 0000000000000002
 ____sys_recvmsg+0x2f5/0x6b0 net/socket.c:2817
 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2846
 do_recvmmsg+0x2ba/0x750 net/socket.c:2940
 __sys_recvmmsg net/socket.c:3019 [inline]
 __do_sys_recvmmsg net/socket.c:3042 [inline]
 __se_sys_recvmmsg net/socket.c:3035 [inline]
 __x64_sys_recvmmsg+0x239/0x290 net/socket.c:3035
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f2a07cf29
RSP: 002b:00007f6f2ae0b0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f6f2a1b4050 RCX: 00007f6f2a07cf29
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f6f2a0ec074 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f6f2a1b4050 R15: 00007ffc4f219028
 </TASK>
task:syz-executor.0  state:R  running task     stack:27168 pid:7293  tgid:7293  ppid:5918   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6745
 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6924
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 zap_pte_range mm/memory.c:1682 [inline]
 zap_pmd_range mm/memory.c:1730 [inline]
 zap_pud_range mm/memory.c:1759 [inline]
 zap_p4d_range mm/memory.c:1780 [inline]
 unmap_page_range+0xbc7/0x41e0 mm/memory.c:1801
 unmap_single_vma+0x194/0x2b0 mm/memory.c:1847
 unmap_vmas+0x22f/0x490 mm/memory.c:1891
 exit_mmap+0x1b8/0xb20 mm/mmap.c:3341
 __mmput+0x12a/0x4d0 kernel/fork.c:1346
 mmput+0x62/0x70 kernel/fork.c:1368
 exit_mm kernel/exit.c:565 [inline]
 do_exit+0x9b7/0x2ba0 kernel/exit.c:861
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1023
 get_signal+0x2616/0x2710 kernel/signal.c:2909
 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2bb4a7cf29
RSP: 002b:00007ffde7920308 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffff92 RBX: 0000000000083c44 RCX: 00007f2bb4a7cf29
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f2bb4bb3f8c
RBP: 000000000008482e R08: 00007f2bb5840080 R09: 0000000100000000
R10: 00007ffde79203f0 R11: 0000000000000246 R12: 00007ffde79203f0
R13: 00007f2bb4bb3f8c R14: 0000000000000bea R15: 00007ffde7920410
 </TASK>