------------[ cut here ]------------ WARNING: CPU: 1 PID: 3623 at kernel/sched/wait.c:245 __wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:246 Modules linked in: CPU: 1 PID: 3623 Comm: syz-executor.0 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+0x40/0x50 kernel/sched/wait.c:245 Code: f3 ff ff 48 8d 6b 40 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 75 11 48 8b 43 40 48 39 c5 75 03 5b 5d c3 <0f> 0b 5b 5d c3 48 89 ef e8 c3 fc 65 00 eb e5 cc 48 c1 e7 06 48 63 RSP: 0018:ffffc9000289f9f8 EFLAGS: 00010002 RAX: ffff888078a548f0 RBX: ffff88807e156608 RCX: 0000000000000000 RDX: 1ffff1100fc2acc9 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffff88807e156648 R08: 0000000000000000 R09: ffff88807e15660b R10: ffffed100fc2acc1 R11: 0000000000000000 R12: ffff88807e156600 R13: ffff888018873a00 R14: dffffc0000000000 R15: ffff88801f7806c0 FS: 0000555555d59400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f13b3c82090 CR3: 00000000254c7000 CR4: 0000000000350ee0 Call Trace: wake_up_pollfree include/linux/wait.h:271 [inline] signalfd_cleanup+0x42/0x60 fs/signalfd.c:38 __cleanup_sighand kernel/fork.c:1590 [inline] __cleanup_sighand+0x72/0xb0 kernel/fork.c:1587 __exit_signal kernel/exit.c:159 [inline] release_task+0xc02/0x17e0 kernel/exit.c:200 wait_task_zombie kernel/exit.c:1114 [inline] wait_consider_task+0x2fa6/0x3b80 kernel/exit.c:1341 do_wait_thread kernel/exit.c:1404 [inline] do_wait+0x6ca/0xce0 kernel/exit.c:1521 kernel_wait4+0x14c/0x260 kernel/exit.c:1684 __do_sys_wait4+0x13f/0x150 kernel/exit.c:1712 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f7773874487 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:00007fff256ab640 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 00000000000000af RCX: 00007f7773874487 RDX: 0000000040000001 RSI: 00007fff256ab6cc RDI: 00000000ffffffff RBP: 00007fff256ab6cc R08: 0000000000000000 R09: 00007fff257c5080 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 0000000000031415 R14: 000000000000000f R15: 00007fff256ab730