syz_io_uring_setup(0xaaf, &(0x7f0000000200), &(0x7f0000ffc000/0x3000)=nil, &(0x7f0000ffe000/0x2000)=nil, &(0x7f00000001c0), &(0x7f0000000380)) (fail_nth: 55)
BUG: memory leak
unreferenced object 0xffff88800cc2a400 (size 256):
  comm "syz-executor.7", pid 11984, jiffies 4297470527 (age 22.488s)
  hex dump (first 32 bytes):
    49 7b e0 49 80 88 ff ff ff bf ff 20 00 00 00 00  I{.I....... ....
    ff ff ff 20 00 00 00 00 00 00 00 00 00 00 00 00  ... ............
  backtrace:
    [<00000000f0b5b27c>] mas_alloc_nodes+0x36e/0x6a0
    [<0000000012e17022>] mas_preallocate+0xff/0x270
    [<00000000d22ee0b3>] do_mas_align_munmap.constprop.0+0x16a/0xfe0
    [<0000000069ed5445>] do_mas_munmap+0x1ed/0x2c0
    [<00000000ce0b7c01>] mmap_region+0x21c/0x1a00
    [<00000000c6af83d9>] do_mmap+0x824/0xf40
    [<00000000a7663032>] vm_mmap_pgoff+0x1b5/0x280
    [<000000001def8db1>] ksys_mmap_pgoff+0x3cc/0x4f0
    [<0000000085279b19>] do_syscall_64+0x3b/0x90
    [<00000000cd1a7832>] entry_SYSCALL_64_after_hwframe+0x46/0xb0

BUG: leak checking failed