executing program
BUG: memory leak
unreferenced object 0xffff88810fd13300 (size 232):
  comm "syz-executor499", pid 8510, jiffies 4294943348 (age 7.900s)
  hex dump (first 32 bytes):
    a0 dc 31 0d 81 88 ff ff a0 dc 31 0d 81 88 ff ff  ..1.......1.....
    00 80 20 13 81 88 ff ff 00 00 00 00 00 00 00 00  .. .............
  backtrace:
    [<00000000ce6379e0>] __build_skb+0x21/0x60 net/core/skbuff.c:316
    [<00000000c9fe0c0c>] __napi_alloc_skb+0xfe/0x160 net/core/skbuff.c:528
    [<000000006ca2034b>] napi_alloc_skb include/linux/skbuff.h:2875 [inline]
    [<000000006ca2034b>] napi_get_frags net/core/dev.c:6138 [inline]
    [<000000006ca2034b>] napi_get_frags+0x3c/0x80 net/core/dev.c:6133
    [<00000000fda4f5c7>] tun_napi_alloc_frags drivers/net/tun.c:1371 [inline]
    [<00000000fda4f5c7>] tun_get_user+0xcf0/0x1b30 drivers/net/tun.c:1734
    [<0000000071def53b>] tun_chr_write_iter+0x84/0xe0 drivers/net/tun.c:1932
    [<000000006c2eaf78>] call_write_iter include/linux/fs.h:1901 [inline]
    [<000000006c2eaf78>] new_sync_write+0x1d7/0x2b0 fs/read_write.c:518
    [<00000000a387e26a>] vfs_write+0x34c/0x400 fs/read_write.c:605
    [<00000000a278e91c>] ksys_write+0x9d/0x160 fs/read_write.c:658
    [<00000000a4bda815>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<00000000be408be6>] entry_SYSCALL_64_after_hwframe+0x44/0xa9