BUG: memory leak
unreferenced object 0xffff88801ba48c40 (size 32):
  comm "syz-executor.0", pid 5930, jiffies 4295245728 (age 21.323s)
  hex dump (first 32 bytes):
    39 70 2d 66 63 61 6c 6c 2d 63 61 63 68 65 2d 37  9p-fcall-cache-7
    30 00 a4 1b 80 88 ff ff 00 00 00 00 00 00 00 00  0...............
  backtrace:
    [<000000002fb09e6a>] kstrdup+0x36/0x70 mm/util.c:60
    [<000000008090b755>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<00000000385ddaf5>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<00000000e034d666>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<00000000ea1714b2>] kobject_add_varg lib/kobject.c:392 [inline]
    [<00000000ea1714b2>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<00000000eea34605>] sysfs_slab_add+0x172/0x200 mm/slub.c:5626
    [<00000000e2413c37>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4445
    [<00000000ff7c0e91>] create_cache mm/slab_common.c:255 [inline]
    [<00000000ff7c0e91>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<000000000aedadaf>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<00000000f74f2785>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<00000000b2525d0e>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<00000000b40b40d6>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<00000000fe54f259>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<00000000819efd7c>] do_new_mount fs/namespace.c:2919 [inline]
    [<00000000819efd7c>] path_mount+0x1331/0x21c0 fs/namespace.c:3249
    [<0000000089098630>] do_mount fs/namespace.c:3262 [inline]
    [<0000000089098630>] __do_sys_mount fs/namespace.c:3470 [inline]
    [<0000000089098630>] __se_sys_mount fs/namespace.c:3447 [inline]
    [<0000000089098630>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3447
    [<000000004a6b29e3>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: memory leak
unreferenced object 0xffff88800d4b9f40 (size 32):
  comm "syz-executor.0", pid 5947, jiffies 4295246009 (age 21.042s)
  hex dump (first 32 bytes):
    39 70 2d 66 63 61 6c 6c 2d 63 61 63 68 65 2d 37  9p-fcall-cache-7
    32 00 4b 0d 80 88 ff ff 00 00 00 00 00 00 00 00  2.K.............
  backtrace:
    [<000000002fb09e6a>] kstrdup+0x36/0x70 mm/util.c:60
    [<000000008090b755>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<00000000385ddaf5>] kvasprintf_const+0x10c/0x1a0 lib/kasprintf.c:48
    [<00000000e034d666>] kobject_set_name_vargs+0x56/0x150 lib/kobject.c:297
    [<00000000ea1714b2>] kobject_add_varg lib/kobject.c:392 [inline]
    [<00000000ea1714b2>] kobject_init_and_add+0xc9/0x160 lib/kobject.c:481
    [<00000000eea34605>] sysfs_slab_add+0x172/0x200 mm/slub.c:5626
    [<00000000e2413c37>] __kmem_cache_create+0x3db/0x520 mm/slub.c:4445
    [<00000000ff7c0e91>] create_cache mm/slab_common.c:255 [inline]
    [<00000000ff7c0e91>] kmem_cache_create_usercopy+0x1db/0x2f0 mm/slab_common.c:350
    [<000000000aedadaf>] p9_client_create+0xc6a/0x1230 net/9p/client.c:1074
    [<00000000f74f2785>] v9fs_session_init+0x1dd/0x1680 fs/9p/v9fs.c:406
    [<00000000b2525d0e>] v9fs_mount+0x79/0x8f0 fs/9p/vfs_super.c:126
    [<00000000b40b40d6>] legacy_get_tree+0x105/0x220 fs/fs_context.c:593
    [<00000000fe54f259>] vfs_get_tree+0x8e/0x300 fs/super.c:1572
    [<00000000819efd7c>] do_new_mount fs/namespace.c:2919 [inline]
    [<00000000819efd7c>] path_mount+0x1331/0x21c0 fs/namespace.c:3249
    [<0000000089098630>] do_mount fs/namespace.c:3262 [inline]
    [<0000000089098630>] __do_sys_mount fs/namespace.c:3470 [inline]
    [<0000000089098630>] __se_sys_mount fs/namespace.c:3447 [inline]
    [<0000000089098630>] __x64_sys_mount+0x282/0x300 fs/namespace.c:3447
    [<000000004a6b29e3>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46

BUG: leak checking failed