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BUG: KASAN: slab-out-of-bounds in _copy_to_iter+0xd18/0x1140 lib/iov_iter.c:527
Write of size 305 at addr ffff888021580fe7 by task kworker/1:0/22

CPU: 1 PID: 22 Comm: kworker/1:0 Not tainted 6.1.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events p9_read_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x15e/0x45d mm/kasan/report.c:395
 kasan_report+0xbf/0x1f0 mm/kasan/report.c:495
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x141/0x190 mm/kasan/generic.c:189
 memcpy+0x3d/0x60 mm/kasan/shadow.c:66
 _copy_to_iter+0xd18/0x1140 lib/iov_iter.c:527
 copy_page_to_iter+0xe0/0xa20 lib/iov_iter.c:725
 pipe_read+0x50e/0x1110 fs/pipe.c:307
 __kernel_read+0x2ca/0x7c0 fs/read_write.c:428
 kernel_read+0xc3/0x1c0 fs/read_write.c:446
 p9_fd_read net/9p/trans_fd.c:266 [inline]
 p9_read_work+0x2b0/0x1040 net/9p/trans_fd.c:301
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x669/0x1090 kernel/workqueue.c:2436
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>

Allocated by task 8120:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:371 [inline]
 ____kasan_kmalloc mm/kasan/common.c:330 [inline]
 __kasan_kmalloc+0xa5/0xb0 mm/kasan/common.c:380
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:955 [inline]
 __kmalloc+0x5a/0xd0 mm/slab_common.c:968
 kmalloc include/linux/slab.h:558 [inline]
 p9_fcall_init+0x97/0x210 net/9p/client.c:228
 p9_tag_alloc+0x208/0x840 net/9p/client.c:293
 p9_client_prepare_req+0x177/0x590 net/9p/client.c:631
 p9_client_rpc+0x1a1/0xd70 net/9p/client.c:678
 p9_client_walk+0x1a0/0x540 net/9p/client.c:1152
 clone_fid fs/9p/fid.h:21 [inline]
 v9fs_fid_clone fs/9p/fid.h:31 [inline]
 v9fs_file_open+0x40c/0xbf0 fs/9p/vfs_file.c:60
 do_dentry_open+0x6cc/0x13f0 fs/open.c:882
 do_open fs/namei.c:3557 [inline]
 path_openat+0x1bf6/0x2860 fs/namei.c:3713
 do_filp_open+0x1ba/0x410 fs/namei.c:3740
 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __x64_sys_openat+0x143/0x1f0 fs/open.c:1337
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888021580fe0
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 7 bytes inside of
 16-byte region [ffff888021580fe0, ffff888021580ff0)

The buggy address belongs to the physical page:
page:ffffea0000856000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21580
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea00009c5ec0 dead000000000002 ffff8880120413c0
raw: 0000000000000000 0000000080800080 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 7353487812, free_ts 7286669966
 prep_new_page mm/page_alloc.c:2539 [inline]
 get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4288
 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5555
 alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2118
 alloc_pages+0x233/0x270 mm/mempolicy.c:2280
 alloc_slab_page mm/slub.c:1794 [inline]
 allocate_slab+0x213/0x300 mm/slub.c:1939
 new_slab mm/slub.c:1992 [inline]
 ___slab_alloc+0xa91/0x1400 mm/slub.c:3180
 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3279
 slab_alloc_node mm/slub.c:3364 [inline]
 __kmem_cache_alloc_node+0x199/0x3e0 mm/slub.c:3437
 __do_kmalloc_node mm/slab_common.c:954 [inline]
 __kmalloc_node_track_caller+0x4b/0xc0 mm/slab_common.c:975
 kvasprintf+0xbe/0x160 lib/kasprintf.c:25
 kvasprintf_const+0x64/0x190 lib/kasprintf.c:49
 kobject_set_name_vargs+0x5a/0x150 lib/kobject.c:257
 dev_set_name+0xbf/0xf0 drivers/base/core.c:3305
 usb_hub_create_port_device+0x394/0xd70 drivers/usb/core/port.c:671
 hub_configure drivers/usb/core/hub.c:1659 [inline]
 hub_probe.cold+0x2534/0x2aa3 drivers/usb/core/hub.c:1896
 usb_probe_interface+0x30f/0x7f0 drivers/usb/core/driver.c:396
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1459 [inline]
 free_pcp_prepare+0x65c/0xd90 mm/page_alloc.c:1509
 free_unref_page_prepare mm/page_alloc.c:3387 [inline]
 free_unref_page+0x1d/0x4d0 mm/page_alloc.c:3483
 __vunmap+0x85d/0xd30 mm/vmalloc.c:2713
 free_work+0x5c/0x80 mm/vmalloc.c:97
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x669/0x1090 kernel/workqueue.c:2436
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Memory state around the buggy address:
 ffff888021580e80: 00 04 fc fc 00 04 fc fc 00 04 fc fc 00 04 fc fc
 ffff888021580f00: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc
>ffff888021580f80: fb fb fc fc fb fb fc fc fb fb fc fc 00 03 fc fc
                                                          ^
 ffff888021581000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888021581080: 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00
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