r1 = syz_open_dev$loop(&(0x7f0000000d00), 0x0, 0x0)
fdatasync(r1)
BUG: memory leak
unreferenced object 0xffff88800c2c4b80 (size 32):
  comm "syz-executor.2", pid 4981, jiffies 4294878789 (age 1443.215s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    02 00 00 00 00 00 00 00 ac 14 14 aa 00 01 00 00  ................
  backtrace:
    [<000000007d6c8c41>] kmalloc include/linux/slab.h:552 [inline]
    [<000000007d6c8c41>] kzalloc include/linux/slab.h:664 [inline]
    [<000000007d6c8c41>] ip_mc_add1_src net/ipv4/igmp.c:1971 [inline]
    [<000000007d6c8c41>] ip_mc_add_src+0x983/0xd50 net/ipv4/igmp.c:2095
    [<00000000e9344227>] ip_mc_source+0xa49/0x1030 net/ipv4/igmp.c:2416
    [<00000000d92c1040>] do_mcast_group_source+0x1ac/0x2b0 net/ipv4/ip_sockglue.c:766
    [<00000000f137ed48>] do_ip_setsockopt net/ipv4/ip_sockglue.c:1309 [inline]
    [<00000000f137ed48>] ip_setsockopt+0xebc/0x3580 net/ipv4/ip_sockglue.c:1423
    [<00000000fa4a06b0>] raw_setsockopt+0x274/0x2c0 net/ipv4/raw.c:857
    [<000000004c5b54e6>] __sys_setsockopt+0x180/0x2a0 net/socket.c:2132
    [<00000000c28e0786>] __do_sys_setsockopt net/socket.c:2143 [inline]
    [<00000000c28e0786>] __se_sys_setsockopt net/socket.c:2140 [inline]
    [<00000000c28e0786>] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2140
    [<000000004ca22411>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
    [<00000000793f5a08>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: leak checking failed