executing program
executing program
BUG: memory leak
unreferenced object 0xffff88811979db00 (size 224):
  comm "syz-executor763", pid 6484, jiffies 4294944519 (age 12.940s)
  hex dump (first 32 bytes):
    a0 14 a7 18 81 88 ff ff a0 14 a7 18 81 88 ff ff  ................
    00 40 d6 19 81 88 ff ff 00 00 00 00 00 00 00 00  .@..............
  backtrace:
    [<000000000a20945d>] __build_skb+0x1f/0x100 net/core/skbuff.c:311
    [<00000000ea4b233e>] __napi_alloc_skb+0xe5/0x140 net/core/skbuff.c:523
    [<00000000b8b63e5b>] napi_alloc_skb include/linux/skbuff.h:2856 [inline]
    [<00000000b8b63e5b>] napi_get_frags net/core/dev.c:6053 [inline]
    [<00000000b8b63e5b>] napi_get_frags+0x3a/0x70 net/core/dev.c:6048
    [<0000000070fab16d>] tun_napi_alloc_frags drivers/net/tun.c:1425 [inline]
    [<0000000070fab16d>] tun_get_user+0xa43/0x1660 drivers/net/tun.c:1789
    [<00000000683e5d4c>] tun_chr_write_iter+0x66/0xa0 drivers/net/tun.c:1986
    [<000000005c1bb210>] call_write_iter include/linux/fs.h:1882 [inline]
    [<000000005c1bb210>] new_sync_write+0x173/0x210 fs/read_write.c:503
    [<00000000279772e7>] __kernel_write+0x140/0x1f0 fs/read_write.c:530
    [<00000000c0fff569>] write_pipe_buf+0x61/0x80 fs/splice.c:799
    [<00000000fade64b4>] splice_from_pipe_feed fs/splice.c:502 [inline]
    [<00000000fade64b4>] __splice_from_pipe+0x154/0x290 fs/splice.c:626
    [<00000000f81ad189>] splice_from_pipe fs/splice.c:661 [inline]
    [<00000000f81ad189>] default_file_splice_write fs/splice.c:811 [inline]
    [<00000000f81ad189>] do_splice_from fs/splice.c:847 [inline]
    [<00000000f81ad189>] do_splice+0x772/0x8d0 fs/splice.c:1144
    [<00000000a08a2dbd>] __do_sys_splice fs/splice.c:1419 [inline]
    [<00000000a08a2dbd>] __se_sys_splice fs/splice.c:1401 [inline]
    [<00000000a08a2dbd>] __x64_sys_splice+0xaa/0x110 fs/splice.c:1401
    [<00000000a57bb725>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<00000000967f7d09>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888118194800 (size 1024):
  comm "syz-executor763", pid 6484, jiffies 4294944519 (age 12.940s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000ea70c5dd>] __kmalloc_reserve net/core/skbuff.c:142 [inline]
    [<00000000ea70c5dd>] pskb_expand_head+0x8e/0x480 net/core/skbuff.c:1627
    [<0000000097172e29>] __skb_grow include/linux/skbuff.h:2718 [inline]
    [<0000000097172e29>] tun_napi_alloc_frags drivers/net/tun.c:1431 [inline]
    [<0000000097172e29>] tun_get_user+0xd71/0x1660 drivers/net/tun.c:1789
    [<00000000683e5d4c>] tun_chr_write_iter+0x66/0xa0 drivers/net/tun.c:1986
    [<000000005c1bb210>] call_write_iter include/linux/fs.h:1882 [inline]
    [<000000005c1bb210>] new_sync_write+0x173/0x210 fs/read_write.c:503
    [<00000000279772e7>] __kernel_write+0x140/0x1f0 fs/read_write.c:530
    [<00000000c0fff569>] write_pipe_buf+0x61/0x80 fs/splice.c:799
    [<00000000fade64b4>] splice_from_pipe_feed fs/splice.c:502 [inline]
    [<00000000fade64b4>] __splice_from_pipe+0x154/0x290 fs/splice.c:626
    [<00000000f81ad189>] splice_from_pipe fs/splice.c:661 [inline]
    [<00000000f81ad189>] default_file_splice_write fs/splice.c:811 [inline]
    [<00000000f81ad189>] do_splice_from fs/splice.c:847 [inline]
    [<00000000f81ad189>] do_splice+0x772/0x8d0 fs/splice.c:1144
    [<00000000a08a2dbd>] __do_sys_splice fs/splice.c:1419 [inline]
    [<00000000a08a2dbd>] __se_sys_splice fs/splice.c:1401 [inline]
    [<00000000a08a2dbd>] __x64_sys_splice+0xaa/0x110 fs/splice.c:1401
    [<00000000a57bb725>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<00000000967f7d09>] entry_SYSCALL_64_after_hwframe+0x44/0xa9