BUG: memory leak
unreferenced object 0xffff888009cce440 (size 32):
  comm "syz-executor.4", pid 14541, jiffies 4296839388 (age 25.270s)
  hex dump (first 32 bytes):
    39 70 2d 66 63 61 6c 6c 2d 63 61 63 68 65 2d 33  9p-fcall-cache-3
    32 37 00 09 80 88 ff ff 00 00 00 00 00 00 00 00  27..............
  backtrace:
    [<00000000db2eddfc>] kstrdup+0x36/0x70 mm/util.c:60
    [<0000000048073390>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<00000000ea67e928>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<000000004f0a00af>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<000000004908f421>] kobject_add_varg lib/kobject.c:392 [inline]
    [<000000004908f421>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<00000000808bb543>] sysfs_slab_add+0x172/0x200 mm/slub.c:5626
    [<00000000f3075dc8>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4445
    [<00000000950b1a3d>] create_cache mm/slab_common.c:255 [inline]
    [<00000000950b1a3d>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<00000000fa7b44e7>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<0000000054e3762e>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<00000000f401c943>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<00000000ac1a12a1>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<000000000859e74f>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<0000000098153661>] do_new_mount fs/namespace.c:2919 [inline]
    [<0000000098153661>] path_mount+0x1331/0x21c0 fs/namespace.c:3249
    [<000000001b41034d>] do_mount fs/namespace.c:3262 [inline]
    [<000000001b41034d>] __do_sys_mount fs/namespace.c:3470 [inline]
    [<000000001b41034d>] __se_sys_mount fs/namespace.c:3447 [inline]
    [<000000001b41034d>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3447
    [<000000006da19243>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: leak checking failed