BUG: memory leak
unreferenced object 0xffff888116a8a520 (size 32):
  comm "syz-executor033", pid 6923, jiffies 4294941351 (age 15.400s)
  hex dump (first 32 bytes):
    34 32 39 34 39 34 31 33 35 31 00 22 81 88 ff ff  4294941351."....
    01 00 00 00 03 00 00 00 11 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000a158f8c0>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000a158f8c0>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000a158f8c0>] slab_alloc mm/slab.c:3319 [inline]
    [<00000000a158f8c0>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548
    [<0000000093964806>] kmalloc include/linux/slab.h:552 [inline]
    [<0000000093964806>] v9fs_random_cachetag fs/9p/cache.c:36 [inline]
    [<0000000093964806>] v9fs_cache_session_get_cookie+0xa6/0x110 fs/9p/cache.c:52
    [<00000000dff3cdab>] v9fs_session_init+0x5c3/0x880 fs/9p/v9fs.c:470
    [<00000000299c1b7a>] v9fs_mount+0x5e/0x3c0 fs/9p/vfs_super.c:124
    [<00000000dd21de24>] legacy_get_tree+0x27/0x80 fs/fs_context.c:647
    [<000000001e0bbefe>] vfs_get_tree+0x2d/0xe0 fs/super.c:1542
    [<00000000fdc997d5>] do_new_mount fs/namespace.c:2823 [inline]
    [<00000000fdc997d5>] do_mount+0x95f/0xc60 fs/namespace.c:3143
    [<0000000006da1d80>] ksys_mount+0xab/0x120 fs/namespace.c:3352
    [<0000000049428c19>] __do_sys_mount fs/namespace.c:3366 [inline]
    [<0000000049428c19>] __se_sys_mount fs/namespace.c:3363 [inline]
    [<0000000049428c19>] __x64_sys_mount+0x26/0x30 fs/namespace.c:3363
    [<000000002a5412ea>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290
    [<00000000ea920da5>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

executing program
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