r1 = syz_io_uring_setup(0x34e1, &(0x7f0000000080)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, &(0x7f00000a0000)=nil, &(0x7f00000b0000)=nil, &(0x7f0000000100)=<r2=>0x0, &(0x7f0000000140)=<r3=>0x0)
syz_io_uring_submit(r2, r3, &(0x7f00000001c0)=@IORING_OP_POLL_ADD={0x6, 0x0, 0x0, @fd_index=0x2}, 0x0)
io_uring_enter(r1, 0x1, 0x0, 0x0, 0x0, 0x0)
BUG: memory leak
unreferenced object 0xffff888040fa84e0 (size 352):
  comm "syz-executor.7", pid 4603, jiffies 4294943649 (age 24.606s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    1e 00 00 00 00 00 00 00 f6 d7 0b 02 00 00 00 00  ................
  backtrace:
    [<00000000d05004e5>] kmem_cache_zalloc include/linux/slab.h:705 [inline]
    [<00000000d05004e5>] taskstats_tgid_alloc kernel/taskstats.c:561 [inline]
    [<00000000d05004e5>] taskstats_exit+0x5c6/0xac0 kernel/taskstats.c:600
    [<0000000016954ccf>] do_exit+0x994/0x2960 kernel/exit.c:817
    [<000000002a50acf3>] do_group_exit+0x125/0x310 kernel/exit.c:929
    [<0000000071359747>] __do_sys_exit_group kernel/exit.c:940 [inline]
    [<0000000071359747>] __se_sys_exit_group kernel/exit.c:938 [inline]
    [<0000000071359747>] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:938
    [<000000003dd03f7c>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<000000003dd03f7c>] do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80
    [<000000009e5873b4>] entry_SYSCALL_64_after_hwframe+0x44/0xae

BUG: leak checking failed