BUG: memory leak
unreferenced object 0xffff888118a0b0a0 (size 32):
  comm "syz-executor.0", pid 7182, jiffies 4295041052 (age 8.090s)
  hex dump (first 32 bytes):
    00 64 6d 61 62 75 66 3a 00 00 00 00 00 00 00 00  .dmabuf:........
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000c627d1fd>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000c627d1fd>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000c627d1fd>] slab_alloc mm/slab.c:3320 [inline]
    [<00000000c627d1fd>] __do_kmalloc mm/slab.c:3654 [inline]
    [<00000000c627d1fd>] __kmalloc_track_caller+0x165/0x300 mm/slab.c:3671
    [<00000000c4d79001>] memdup_user+0x26/0xc0 mm/util.c:172
    [<000000004213f220>] strndup_user+0x62/0x80 mm/util.c:231
    [<00000000bec304ba>] dma_buf_set_name drivers/dma-buf/dma-buf.c:331 [inline]
    [<00000000bec304ba>] dma_buf_ioctl+0x60/0x1e0 drivers/dma-buf/dma-buf.c:391
    [<00000000c40487da>] vfs_ioctl fs/ioctl.c:47 [inline]
    [<00000000c40487da>] file_ioctl fs/ioctl.c:545 [inline]
    [<00000000c40487da>] do_vfs_ioctl+0x551/0x890 fs/ioctl.c:732
    [<0000000028eade7d>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:749
    [<0000000023319e8f>] __do_sys_ioctl fs/ioctl.c:756 [inline]
    [<0000000023319e8f>] __se_sys_ioctl fs/ioctl.c:754 [inline]
    [<0000000023319e8f>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:754
    [<00000000be1db2a2>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
    [<00000000ea3ab38a>] entry_SYSCALL_64_after_hwframe+0x44/0xa9