================================================================== BUG: KASAN: use-after-free in driver_find drivers/base/driver.c:223 [inline] BUG: KASAN: use-after-free in driver_register+0x33a/0x380 drivers/base/driver.c:164 Read of size 8 at addr ffff888077fd60c8 by task syz-executor203/15464 CPU: 0 PID: 15464 Comm: syz-executor203 Not tainted 5.18.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x495 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 driver_find drivers/base/driver.c:223 [inline] driver_register+0x33a/0x380 drivers/base/driver.c:164 usb_gadget_register_driver_owner+0xe3/0x1f0 drivers/usb/gadget/udc/core.c:1558 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:513 [inline] raw_ioctl+0x12cb/0x2230 drivers/usb/gadget/legacy/raw_gadget.c:1220 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fcad77740a7 Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 64 47 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd327d4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffd327d5090 RCX: 00007fcad77740a7 RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000003 RBP: 0000000000000000 R08: 000000000000ffff R09: 000000000000000b R10: 00007ffd327d40c0 R11: 0000000000000246 R12: 00007ffd327d4060 R13: 0000000000000000 R14: 00007fcad77e7440 R15: 0000000000000003 Allocated by task 15333: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc mm/kasan/common.c:515 [inline] ____kasan_kmalloc mm/kasan/common.c:474 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:714 [inline] bus_add_driver+0xb4/0x570 drivers/base/bus.c:602 driver_register+0x20a/0x380 drivers/base/driver.c:171 usb_gadget_register_driver_owner+0xe3/0x1f0 drivers/usb/gadget/udc/core.c:1558 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:513 [inline] raw_ioctl+0x12cb/0x2230 drivers/usb/gadget/legacy/raw_gadget.c:1220 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 15464: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1754 slab_free mm/slub.c:3510 [inline] kfree+0xd6/0x4d0 mm/slub.c:4552 kobject_cleanup lib/kobject.c:673 [inline] kobject_release lib/kobject.c:704 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x139/0x410 lib/kobject.c:721 driver_find drivers/base/driver.c:221 [inline] driver_register+0x1d2/0x380 drivers/base/driver.c:164 usb_gadget_register_driver_owner+0xe3/0x1f0 drivers/usb/gadget/udc/core.c:1558 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:513 [inline] raw_ioctl+0x12cb/0x2230 drivers/usb/gadget/legacy/raw_gadget.c:1220 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348 kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3595 inetdev_event+0x6e4/0x11c0 net/ipv4/devinet.c:1590 notifier_call_chain+0x94/0x170 kernel/notifier.c:84 call_netdevice_notifiers_extack net/core/dev.c:1976 [inline] call_netdevice_notifiers net/core/dev.c:1990 [inline] dev_close_many+0x28c/0x560 net/core/dev.c:1538 unregister_netdevice_many+0x36d/0x1650 net/core/dev.c:10722 default_device_exit_batch+0x39f/0x4f0 net/core/dev.c:11241 cleanup_net+0x423/0x980 net/core/net_namespace.c:594 process_one_work+0x865/0x13d0 kernel/workqueue.c:2289 worker_thread+0x598/0xec0 kernel/workqueue.c:2436 kthread+0x299/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 The buggy address belongs to the object at ffff888077fd6000 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 200 bytes inside of 256-byte region [ffff888077fd6000, ffff888077fd6100) The buggy address belongs to the physical page: page:ffffea0001dff580 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x77fd6 head:ffffea0001dff580 order:1 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010841b40 raw: 0000000000000000 0000000080100010 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4039, tgid 4039 (syz-executor.4), ts 75995479337, free_ts 75861789130 prep_new_page mm/page_alloc.c:2441 [inline] get_page_from_freelist+0x178d/0x3dc0 mm/page_alloc.c:4182 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5408 alloc_slab_page mm/slub.c:1799 [inline] allocate_slab+0x26c/0x3c0 mm/slub.c:1944 new_slab mm/slub.c:2004 [inline] ___slab_alloc+0x8e1/0xf20 mm/slub.c:3005 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3092 slab_alloc_node mm/slub.c:3183 [inline] slab_alloc mm/slub.c:3225 [inline] kmem_cache_alloc_trace+0x310/0x3f0 mm/slub.c:3256 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:714 [inline] ____ip_mc_inc_group+0x1a7/0xa10 net/ipv4/igmp.c:1442 __ip_mc_inc_group net/ipv4/igmp.c:1477 [inline] ip_mc_inc_group net/ipv4/igmp.c:1483 [inline] ip_mc_up+0x12d/0x2b0 net/ipv4/igmp.c:1782 inetdev_event+0x1fe/0x11c0 net/ipv4/devinet.c:1579 notifier_call_chain+0x94/0x170 kernel/notifier.c:84 call_netdevice_notifiers_extack net/core/dev.c:1976 [inline] call_netdevice_notifiers net/core/dev.c:1990 [inline] __dev_notify_flags+0xcd/0x220 net/core/dev.c:8471 dev_change_flags+0xf6/0x150 net/core/dev.c:8509 do_setlink+0x81b/0x2da0 net/core/rtnetlink.c:2731 __rtnl_newlink+0xb05/0x13f0 net/core/rtnetlink.c:3416 rtnl_newlink+0x5a/0x90 net/core/rtnetlink.c:3531 rtnetlink_rcv_msg+0x31d/0x8d0 net/core/rtnetlink.c:5993 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1356 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1406 free_unref_page_prepare mm/page_alloc.c:3328 [inline] free_unref_page+0x19/0x6a0 mm/page_alloc.c:3423 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2523 qlink_free mm/kasan/quarantine.c:157 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:749 [inline] slab_alloc_node mm/slub.c:3217 [inline] kmem_cache_alloc_node+0x255/0x3f0 mm/slub.c:3267 __alloc_skb+0x151/0x270 net/core/skbuff.c:414 alloc_skb include/linux/skbuff.h:1300 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1191 [inline] netlink_sendmsg+0x7f3/0xc20 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:725 __sys_sendto+0x19e/0x270 net/socket.c:2040 __do_sys_sendto net/socket.c:2052 [inline] __se_sys_sendto net/socket.c:2048 [inline] __x64_sys_sendto+0xd8/0x1b0 net/socket.c:2048 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Memory state around the buggy address: ffff888077fd5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888077fd6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888077fd6080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888077fd6100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888077fd6180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================