------------[ cut here ]------------
WARNING: CPU: 1 PID: 294 at kernel/sched/wait.c:245 __wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:246
Modules linked in:
CPU: 1 PID: 294 Comm: syz-executor.2 Not tainted 5.16.0-rc8-next-20220105 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:__wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:245
Code: 6b 40 e8 03 e7 ff ff 48 89 ea 48 b8 00 00 00 00 00 fc ff df 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 d3 9f 4e 00 eb e5 cc 48 c1 e7 06 48 63
RSP: 0018:ffff888035cafa88 EFLAGS: 00010002
RAX: ffff88800dee90b0 RBX: ffff8880178c6608 RCX: 0000000000000000
RDX: 1ffff11002f18cc9 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff8880178c6648 R08: 0000000000000000 R09: ffff8880178c660b
R10: ffffed1002f18cc1 R11: 0000000000000001 R12: ffff8880178c6600
R13: ffff8880178c65c0 R14: ffff88801578b580 R15: dffffc0000000000
FS:  0000555556864400(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe1a073fc8 CR3: 000000000fe30000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 wake_up_pollfree include/linux/wait.h:271 [inline]
 signalfd_cleanup+0x42/0x60 fs/signalfd.c:38
 __cleanup_sighand kernel/fork.c:1596 [inline]
 __cleanup_sighand+0x72/0xb0 kernel/fork.c:1593
 __exit_signal kernel/exit.c:159 [inline]
 release_task+0xb5f/0x14c0 kernel/exit.c:200
 wait_task_zombie kernel/exit.c:1117 [inline]
 wait_consider_task+0x2f11/0x3b60 kernel/exit.c:1344
 do_wait_thread kernel/exit.c:1407 [inline]
 do_wait+0x6a4/0xc70 kernel/exit.c:1524
 kernel_wait4+0x14c/0x260 kernel/exit.c:1687
 __do_sys_wait4+0x13f/0x150 kernel/exit.c:1715
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fa60911afb7
Code: 89 7c 24 10 48 89 4c 24 18 e8 d5 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 05 51 02 00 8b 44
RSP: 002b:00007fff0c2baec0 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 00000000000001e7 RCX: 00007fa60911afb7
RDX: 0000000040000001 RSI: 00007fff0c2baf4c RDI: 00000000ffffffff
RBP: 00007fff0c2baf4c R08: 0000000000000000 R09: 00007fff0c2d7080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 0000000000152e2c R14: 0000000000000007 R15: 00007fff0c2bafb0
 </TASK>
irq event stamp: 990108
hardirqs last  enabled at (990107): [<ffffffff8407947f>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last  enabled at (990107): [<ffffffff8407947f>] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202
hardirqs last disabled at (990108): [<ffffffff840797e1>] __raw_write_lock_irq include/linux/rwlock_api_smp.h:193 [inline]
hardirqs last disabled at (990108): [<ffffffff840797e1>] _raw_write_lock_irq+0x41/0x50 kernel/locking/spinlock.c:326
softirqs last  enabled at (988700): [<ffffffff810966d2>] fpu_clone+0x312/0xa20 arch/x86/kernel/fpu/core.c:524
softirqs last disabled at (988698): [<ffffffff81096641>] fpu_clone+0x281/0xa20 arch/x86/kernel/fpu/core.c:498
---[ end trace 0000000000000000 ]---
debugfs: Directory 'sg0' with parent 'block' already present!
blktrace: debugfs_dir not present for sg0 so skipping
debugfs: Directory 'sg0' with parent 'block' already present!
blktrace: debugfs_dir not present for sg0 so skipping