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BUG: KASAN: slab-out-of-bounds in _copy_to_iter+0xa46/0x1000 lib/iov_iter.c:527
Write of size 12 at addr ffff888022e8a127 by task kworker/1:1/26

CPU: 1 PID: 26 Comm: kworker/1:1 Not tainted 6.1.0-rc1-syzkaller-00249-g4da34b7d175d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Workqueue: events p9_read_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description+0x74/0x340 mm/kasan/report.c:284
 print_report+0x107/0x220 mm/kasan/report.c:395
 kasan_report+0x139/0x170 mm/kasan/report.c:495
 kasan_check_range+0x2a7/0x2e0 mm/kasan/generic.c:189
 memcpy+0x3c/0x60 mm/kasan/shadow.c:66
 _copy_to_iter+0xa46/0x1000 lib/iov_iter.c:527
 copy_page_to_iter+0xd2/0x1b0 lib/iov_iter.c:725
 pipe_read+0x58a/0x12a0 fs/pipe.c:307
 __kernel_read+0x3c4/0x7e0 fs/read_write.c:428
 p9_fd_read net/9p/trans_fd.c:266 [inline]
 p9_read_work+0x389/0xfa0 net/9p/trans_fd.c:301
 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>

Allocated by task 3611:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x70 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:371 [inline]
 __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:955 [inline]
 __kmalloc+0xaf/0x1a0 mm/slab_common.c:968
 kmalloc include/linux/slab.h:581 [inline]
 p9_fcall_init net/9p/client.c:228 [inline]
 p9_tag_alloc net/9p/client.c:293 [inline]
 p9_client_prepare_req+0x4f9/0xbb0 net/9p/client.c:631
 p9_client_rpc+0x1a2/0xad0 net/9p/client.c:678
 p9_client_walk+0x1d6/0x690 net/9p/client.c:1152
 clone_fid fs/9p/fid.h:21 [inline]
 v9fs_fid_xattr_set+0x288/0x440 fs/9p/xattr.c:118
 v9fs_xattr_set+0x55/0x100 fs/9p/xattr.c:100
 __vfs_setxattr+0x3f4/0x430 fs/xattr.c:182
 __vfs_setxattr_noperm+0x128/0x5d0 fs/xattr.c:216
 vfs_setxattr+0x228/0x450 fs/xattr.c:309
 do_setxattr fs/xattr.c:594 [inline]
 setxattr fs/xattr.c:617 [inline]
 path_setxattr+0x3b0/0x4b0 fs/xattr.c:636
 __do_sys_setxattr fs/xattr.c:652 [inline]
 __se_sys_setxattr fs/xattr.c:648 [inline]
 __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888022e8a120
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 7 bytes inside of
 16-byte region [ffff888022e8a120, ffff888022e8a130)

The buggy address belongs to the physical page:
page:ffffea00008ba280 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888022e8aba0 pfn:0x22e8a
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 dead000000000100 dead000000000122 ffff8880120413c0
raw: ffff888022e8aba0 0000000080800076 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 7751239110, free_ts 0
 prep_new_page mm/page_alloc.c:2538 [inline]
 get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4287
 __alloc_pages+0x259/0x560 mm/page_alloc.c:5554
 alloc_page_interleave+0x22/0x1c0 mm/mempolicy.c:2118
 alloc_slab_page+0x70/0xf0 mm/slub.c:1794
 allocate_slab+0x5e/0x4b0 mm/slub.c:1939
 new_slab mm/slub.c:1992 [inline]
 ___slab_alloc+0x7f4/0xeb0 mm/slub.c:3180
 __slab_alloc mm/slub.c:3279 [inline]
 slab_alloc_node mm/slub.c:3364 [inline]
 __kmem_cache_alloc_node+0x252/0x310 mm/slub.c:3437
 __do_kmalloc_node mm/slab_common.c:954 [inline]
 __kmalloc_node_track_caller+0x9c/0x1a0 mm/slab_common.c:975
 kvasprintf+0xdb/0x190 lib/kasprintf.c:25
 kobject_set_name_vargs+0x5d/0x110 lib/kobject.c:257
 dev_set_name+0xd1/0x120 drivers/base/core.c:3305
 usb_hub_create_port_device+0x3ca/0xb50 drivers/usb/core/port.c:671
 hub_configure+0x194c/0x2770 drivers/usb/core/hub.c:1659
 hub_probe+0x886/0xa00 drivers/usb/core/hub.c:1896
 usb_probe_interface+0x66e/0xb60 drivers/usb/core/driver.c:396
 call_driver_probe+0x96/0x250
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888022e8a000: 00 04 fc fc 00 04 fc fc 00 04 fc fc 00 04 fc fc
 ffff888022e8a080: 00 04 fc fc 00 04 fc fc fb fb fc fc fb fb fc fc
>ffff888022e8a100: fb fb fc fc 00 03 fc fc fa fb fc fc fa fb fc fc
                                  ^
 ffff888022e8a180: fa fb fc fc fa fb fc fc 00 06 fc fc fa fb fc fc
 ffff888022e8a200: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
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