================================================================== BUG: KASAN: use-after-free in driver_find drivers/base/driver.c:293 [inline] BUG: KASAN: use-after-free in driver_register+0x2c1/0x3e0 drivers/base/driver.c:233 Read of size 8 at addr ffff888076698ac8 by task syz-executor.4/19241 CPU: 1 PID: 19241 Comm: syz-executor.4 Not tainted 5.19.0-rc3-syzkaller-00279-g8c23f235a6a8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:313 print_report+0xf4/0x210 mm/kasan/report.c:429 kasan_report+0xfb/0x130 mm/kasan/report.c:491 driver_find drivers/base/driver.c:293 [inline] driver_register+0x2c1/0x3e0 drivers/base/driver.c:233 usb_gadget_register_driver_owner+0xd9/0x230 drivers/usb/gadget/udc/core.c:1558 raw_ioctl_run+0xbd/0x300 drivers/usb/gadget/legacy/raw_gadget.c:515 raw_ioctl+0x163/0xc20 drivers/usb/gadget/legacy/raw_gadget.c:1222 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 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+0x46/0xb0 RIP: 0033:0x7fb48b888ec7 Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 34 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb48c9e9098 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb48c9ea110 RCX: 00007fb48b888ec7 RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000006 RBP: 0000000000000006 R08: 000000000000ffff R09: 000000000000000b R10: 00007fb48c9e9140 R11: 0000000000000246 R12: 0000000000000000 R13: 00000000200007c0 R14: 00000000200005c0 R15: 0000000000000868 Allocated by task 19219: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:515 kasan_kmalloc include/linux/kasan.h:234 [inline] kmem_cache_alloc_trace+0x94/0x310 mm/slub.c:3284 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] bus_add_driver+0xde/0x600 drivers/base/bus.c:602 driver_register+0x2e9/0x3e0 drivers/base/driver.c:240 usb_gadget_register_driver_owner+0xd9/0x230 drivers/usb/gadget/udc/core.c:1558 raw_ioctl_run+0xbd/0x300 drivers/usb/gadget/legacy/raw_gadget.c:515 raw_ioctl+0x163/0xc20 drivers/usb/gadget/legacy/raw_gadget.c:1222 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 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+0x46/0xb0 Freed by task 19241: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0xd8/0x110 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1754 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1780 slab_free mm/slub.c:3536 [inline] kfree+0xc6/0x210 mm/slub.c:4584 kobject_cleanup+0x235/0x470 lib/kobject.c:673 driver_find drivers/base/driver.c:291 [inline] driver_register+0x29b/0x3e0 drivers/base/driver.c:233 usb_gadget_register_driver_owner+0xd9/0x230 drivers/usb/gadget/udc/core.c:1558 raw_ioctl_run+0xbd/0x300 drivers/usb/gadget/legacy/raw_gadget.c:515 raw_ioctl+0x163/0xc20 drivers/usb/gadget/legacy/raw_gadget.c:1222 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 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+0x46/0xb0 The buggy address belongs to the object at ffff888076698a00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 200 bytes inside of 256-byte region [ffff888076698a00, ffff888076698b00) The buggy address belongs to the physical page: page:ffffea0001d9a600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76698 head:ffffea0001d9a600 order:1 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888011c41b40 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3623, tgid 3623 (syz-executor.1), ts 58693859104, free_ts 58548518582 prep_new_page mm/page_alloc.c:2456 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4198 __alloc_pages+0x259/0x560 mm/page_alloc.c:5426 alloc_slab_page+0x70/0xf0 mm/slub.c:1824 allocate_slab+0x5e/0x520 mm/slub.c:1969 new_slab mm/slub.c:2029 [inline] ___slab_alloc+0x42e/0xce0 mm/slub.c:3031 __slab_alloc mm/slub.c:3118 [inline] slab_alloc_node mm/slub.c:3209 [inline] slab_alloc mm/slub.c:3251 [inline] __kmalloc+0x2ba/0x370 mm/slub.c:4442 kmalloc include/linux/slab.h:605 [inline] kzalloc include/linux/slab.h:733 [inline] new_dir fs/proc/proc_sysctl.c:978 [inline] get_subdir fs/proc/proc_sysctl.c:1022 [inline] __register_sysctl_table+0xaf7/0x1340 fs/proc/proc_sysctl.c:1373 neigh_sysctl_register+0x40c/0x4f0 net/core/neighbour.c:3793 devinet_sysctl_register+0x9d/0x1a0 net/ipv4/devinet.c:2623 inetdev_init+0x28f/0x4c0 net/ipv4/devinet.c:279 inetdev_event+0x282/0x1400 net/ipv4/devinet.c:1534 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1945 [inline] call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers+0x14e/0x1d0 net/core/dev.c:1997 register_netdevice+0x1595/0x1980 net/core/dev.c:10080 geneve_configure+0x6cd/0xa60 drivers/net/geneve.c:1431 geneve_newlink+0xfa/0x1a0 drivers/net/geneve.c:1682 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1371 [inline] free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1421 free_unref_page_prepare mm/page_alloc.c:3343 [inline] free_unref_page+0x7d/0x390 mm/page_alloc.c:3438 do_slab_free mm/slub.c:3524 [inline] ___cache_free+0x118/0x1a0 mm/slub.c:3543 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc_node mm/slub.c:3243 [inline] slab_alloc mm/slub.c:3251 [inline] kmem_cache_alloc_trace+0x1db/0x310 mm/slub.c:3282 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] ref_tracker_alloc+0x13b/0x470 lib/ref_tracker.c:85 __netdev_tracker_alloc include/linux/netdevice.h:3960 [inline] dev_hold_track include/linux/netdevice.h:3989 [inline] netdev_queue_add_kobject net/core/net-sysfs.c:1663 [inline] netdev_queue_update_kobjects+0x19e/0x4c0 net/core/net-sysfs.c:1718 register_queue_kobjects net/core/net-sysfs.c:1779 [inline] netdev_register_kobject+0x263/0x310 net/core/net-sysfs.c:2019 register_netdevice+0x132c/0x1980 net/core/dev.c:10047 macvlan_common_newlink+0xdb8/0x1500 drivers/net/macvlan.c:1512 rtnl_newlink_create net/core/rtnetlink.c:3363 [inline] __rtnl_newlink net/core/rtnetlink.c:3580 [inline] rtnl_newlink+0x14ed/0x2060 net/core/rtnetlink.c:3593 rtnetlink_rcv_msg+0x7c9/0xea0 net/core/rtnetlink.c:6089 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2501 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7e7/0x9c0 net/netlink/af_netlink.c:1345 Memory state around the buggy address: ffff888076698980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888076698a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888076698a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888076698b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888076698b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================