------------[ cut here ]------------ WARNING: CPU: 1 PID: 3640 at kernel/sched/wait.c:245 __wake_up_pollfree+0x1c7/0x1d0 kernel/sched/wait.c:246 Modules linked in: CPU: 1 PID: 3640 Comm: syz-executor.5 Not tainted 5.16.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__wake_up_pollfree+0x1c7/0x1d0 kernel/sched/wait.c:245 Code: 0d 00 00 c6 44 08 0f 00 65 48 8b 04 25 28 00 00 00 48 3b 84 24 a0 00 00 00 75 13 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b eb a7 e8 60 fd af 08 55 41 57 41 56 41 55 41 54 53 48 83 ec RSP: 0018:ffffc9000286f760 EFLAGS: 00010093 RAX: ffff88801e1839b0 RBX: 0000000000000046 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffffc9000286f848 R08: dffffc0000000000 R09: ffffed100f75625a R10: ffffed100f75625a R11: 0000000000000000 R12: 0000000000000000 R13: ffffc9000286f7a0 R14: 1ffff9200050def4 R15: ffff88807bab1308 FS: 00005555571c2400(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555569b6708 CR3: 0000000027533000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __cleanup_sighand+0x48/0xa0 kernel/fork.c:1587 __exit_signal kernel/exit.c:159 [inline] release_task+0x115f/0x15d0 kernel/exit.c:200 wait_task_zombie kernel/exit.c:1114 [inline] wait_consider_task+0x1995/0x2fb0 kernel/exit.c:1341 do_wait_thread kernel/exit.c:1404 [inline] do_wait+0x291/0x9d0 kernel/exit.c:1521 kernel_wait4+0x2a3/0x3c0 kernel/exit.c:1684 __do_sys_wait4 kernel/exit.c:1712 [inline] __se_sys_wait4 kernel/exit.c:1708 [inline] __x64_sys_wait4+0x130/0x1e0 kernel/exit.c:1708 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fb319b06487 Code: 89 7c 24 10 48 89 4c 24 18 e8 35 50 02 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 65 50 02 00 8b 44 RSP: 002b:00007ffeeb3f7080 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000000001d79 RCX: 00007fb319b06487 RDX: 0000000040000001 RSI: 00007ffeeb3f710c RDI: 00000000ffffffff RBP: 00007ffeeb3f710c R08: 0000000000000000 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 0000000000353170 R14: 000000000000000a R15: 00007ffeeb3f7170