------------[ cut here ]------------ WARNING: CPU: 1 PID: 3716 at kernel/sched/wait.c:245 __wake_up_pollfree+0x40/0x50 kernel/sched/wait.c:246 Modules linked in: CPU: 1 PID: 3716 Comm: syz-executor.0 Not tainted 5.16.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 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 a3 e6 65 00 eb e5 cc 48 c1 e7 06 48 63 RSP: 0018:ffffc90001fbf9d8 EFLAGS: 00010083 RAX: ffff8880201fadf0 RBX: ffff888017d68048 RCX: 0000000000000000 RDX: 1ffff11002fad011 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffff888017d68088 R08: 0000000000000000 R09: ffff888017d6804b R10: ffffed1002fad009 R11: 0000000000000000 R12: ffff888017d68040 R13: ffff88801a228000 R14: dffffc0000000000 R15: ffff88801a7f1b00 FS: 0000000000000000(0000) GS:ffff88802cb00000(0063) knlGS:00000000576b5380 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000033b27000 CR3: 000000006b8e1000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: wake_up_pollfree include/linux/wait.h:271 [inline] signalfd_cleanup+0x42/0x60 fs/signalfd.c:38 __cleanup_sighand kernel/fork.c:1587 [inline] __cleanup_sighand+0x72/0xb0 kernel/fork.c:1584 __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_compat_sys_wait4+0x137/0x150 kernel/exit.c:1742 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf6f54549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000fff9d020 EFLAGS: 00000286 ORIG_RAX: 0000000000000072 RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00000000fff9d0f0 RDX: 0000000040000001 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000bb8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi 4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d a: 10 06 adc %al,(%rsi) c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 10: 10 07 adc %al,(%rdi) 12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi 16: 10 08 adc %cl,(%rax) 18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1c: 00 00 add %al,(%rax) 1e: 00 00 add %al,(%rax) 20: 00 51 52 add %dl,0x52(%rcx) 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 * 2a: 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 retq 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi