================================================================== BUG: KASAN: slab-out-of-bounds in read_descriptors+0x263/0x280 drivers/usb/core/sysfs.c:883 Read of size 8 at addr ffff88802250bf08 by task udevd/5220 CPU: 1 PID: 5220 Comm: udevd Not tainted 6.4.0-rc6-syzkaller-00195-g40f71e7cd3c6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 read_descriptors+0x263/0x280 drivers/usb/core/sysfs.c:883 sysfs_kf_bin_read+0x19a/0x270 fs/sysfs/file.c:97 kernfs_file_read_iter fs/kernfs/file.c:251 [inline] kernfs_fop_read_iter+0x387/0x690 fs/kernfs/file.c:280 call_read_iter include/linux/fs.h:1862 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x4b1/0x8a0 fs/read_write.c:470 ksys_read+0x12b/0x250 fs/read_write.c:613 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 RIP: 0033:0x7fcd59116b6a Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffda3c9f388 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcd59116b6a RDX: 0000000000010011 RSI: 00007ffda3c9f3b7 RDI: 0000000000000008 RBP: 0000000000000008 R08: 0000000000000003 R09: 7595140cab11ffe1 R10: 0000000000000000 R11: 0000000000000246 R12: 0000561bd7cfd550 R13: 00007ffda3cafa98 R14: 00007ffda3cb00e8 R15: 00007ffda3c9f3b7 Allocated by task 10581: 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:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc+0x5e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:680 [inline] usb_get_configuration+0x1f7/0x5170 drivers/usb/core/config.c:887 usb_enumerate_device drivers/usb/core/hub.c:2407 [inline] usb_new_device+0x12b0/0x19d0 drivers/usb/core/hub.c:2545 hub_port_connect drivers/usb/core/hub.c:5407 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x2d9e/0x4e40 drivers/usb/core/hub.c:5793 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff88802250bf00 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes to the right of allocated 8-byte region [ffff88802250bf00, ffff88802250bf08) The buggy address belongs to the physical page: page:ffffea00008942c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2250b anon flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000200 ffff888012441280 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080660066 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 14160, tgid 14159 (syz-executor.0), ts 506741209950, free_ts 506740914436 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3502 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4768 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3192 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291 __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3490 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc_node_track_caller+0x4f/0x1a0 mm/slab_common.c:986 kstrdup+0x3f/0x70 mm/util.c:62 kstrdup_const+0x57/0x80 mm/util.c:85 __kernfs_new_node+0x9d/0x8b0 fs/kernfs/dir.c:607 kernfs_new_node fs/kernfs/dir.c:673 [inline] kernfs_create_dir_ns+0xa0/0x230 fs/kernfs/dir.c:1034 sysfs_create_dir_ns+0x12b/0x290 fs/sysfs/dir.c:59 create_dir lib/kobject.c:65 [inline] kobject_add_internal+0x2c9/0x9c0 lib/kobject.c:233 kobject_add_varg lib/kobject.c:368 [inline] kobject_add+0x158/0x230 lib/kobject.c:420 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2564 free_unref_page+0x33/0x370 mm/page_alloc.c:2659 __dev_alloc_name net/core/dev.c:1077 [inline] dev_alloc_name_ns+0x42c/0x610 net/core/dev.c:1099 dev_get_valid_name+0x69/0x170 net/core/dev.c:1134 register_netdevice+0x3ba/0x1640 net/core/dev.c:10006 br_dev_newlink+0x27/0x110 net/bridge/br_netlink.c:1540 rtnl_newlink_create net/core/rtnetlink.c:3465 [inline] __rtnl_newlink+0x10c2/0x1840 net/core/rtnetlink.c:3682 rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3695 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6417 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 ____sys_sendmsg+0x71c/0x900 net/socket.c:2503 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2557 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2586 Memory state around the buggy address: ffff88802250be00: fc fc fa fc fc fc fc fa fc fc fc fc fa fc fc fc ffff88802250be80: fc fa fc fc fc fc fa fc fc fc fc fa fc fc fc fc >ffff88802250bf00: 00 fc fc fc fc fa fc fc fc fc fa fc fc fc fc fb ^ ffff88802250bf80: fc fc fc fc fa fc fc fc fc fa fc fc fc fc fc fc ffff88802250c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================