================================================================== BUG: KASAN: slab-use-after-free in __list_add_valid_or_report+0x4c/0xf0 lib/list_debug.c:29 Read of size 8 at addr ffff888068af6008 by task syz-executor.0/22255 CPU: 1 PID: 22255 Comm: syz-executor.0 Not tainted 6.6.0-rc1-syzkaller-00033-g3669558bdf35 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 __list_add_valid_or_report+0x4c/0xf0 lib/list_debug.c:29 __list_add_valid include/linux/list.h:88 [inline] __list_add include/linux/list.h:150 [inline] list_add include/linux/list.h:169 [inline] nfc_llcp_register_device+0x6cf/0x800 net/nfc/llcp_core.c:1639 nfc_register_device+0x71/0x320 net/nfc/core.c:1124 nci_register_device+0x7c2/0x900 net/nfc/nci/core.c:1257 virtual_ncidev_open+0x13c/0x1b0 drivers/nfc/virtual_ncidev.c:148 misc_open+0x30b/0x380 drivers/char/misc.c:165 chrdev_open+0x551/0x630 fs/char_dev.c:414 do_dentry_open+0x80f/0x1430 fs/open.c:929 do_open fs/namei.c:3639 [inline] path_openat+0x27bb/0x3180 fs/namei.c:3796 do_filp_open+0x234/0x490 fs/namei.c:3823 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f901127cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f90120af0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f901139bf80 RCX: 00007f901127cae9 RDX: 0000000000000002 RSI: 0000000020001a40 RDI: ffffffffffffff9c RBP: 00007f90112c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f901139bf80 R15: 00007fff031ab168 Allocated by task 22249: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] nfc_llcp_register_device+0x55/0x800 net/nfc/llcp_core.c:1602 nfc_register_device+0x71/0x320 net/nfc/core.c:1124 nci_register_device+0x7c2/0x900 net/nfc/nci/core.c:1257 virtual_ncidev_open+0x13c/0x1b0 drivers/nfc/virtual_ncidev.c:148 misc_open+0x30b/0x380 drivers/char/misc.c:165 chrdev_open+0x551/0x630 fs/char_dev.c:414 do_dentry_open+0x80f/0x1430 fs/open.c:929 do_open fs/namei.c:3639 [inline] path_openat+0x27bb/0x3180 fs/namei.c:3796 do_filp_open+0x234/0x490 fs/namei.c:3823 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 22246: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0x25f/0x3b0 mm/slub.c:3822 nfc_unregister_device+0x167/0x2a0 net/nfc/core.c:1179 virtual_ncidev_close+0x59/0x90 drivers/nfc/virtual_ncidev.c:163 __fput+0x3f8/0x910 fs/file_table.c:384 __do_sys_close fs/open.c:1572 [inline] __se_sys_close+0x15f/0x220 fs/open.c:1557 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 insert_work+0x3e/0x320 kernel/workqueue.c:1647 __queue_work+0xc2d/0xff0 kernel/workqueue.c:1799 queue_work_on+0x14f/0x250 kernel/workqueue.c:1834 queue_work include/linux/workqueue.h:554 [inline] schedule_work include/linux/workqueue.h:615 [inline] rfkill_register+0x729/0x880 net/rfkill/core.c:1090 nfc_register_device+0x148/0x320 net/nfc/core.c:1132 nci_register_device+0x7c2/0x900 net/nfc/nci/core.c:1257 virtual_ncidev_open+0x13c/0x1b0 drivers/nfc/virtual_ncidev.c:148 misc_open+0x30b/0x380 drivers/char/misc.c:165 chrdev_open+0x551/0x630 fs/char_dev.c:414 do_dentry_open+0x80f/0x1430 fs/open.c:929 do_open fs/namei.c:3639 [inline] path_openat+0x27bb/0x3180 fs/namei.c:3796 do_filp_open+0x234/0x490 fs/namei.c:3823 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492 insert_work+0x3e/0x320 kernel/workqueue.c:1647 __queue_work+0xc2d/0xff0 kernel/workqueue.c:1799 queue_work_on+0x14f/0x250 kernel/workqueue.c:1834 queue_work include/linux/workqueue.h:554 [inline] schedule_work include/linux/workqueue.h:615 [inline] rfkill_register+0x729/0x880 net/rfkill/core.c:1090 nfc_register_device+0x148/0x320 net/nfc/core.c:1132 nci_register_device+0x7c2/0x900 net/nfc/nci/core.c:1257 virtual_ncidev_open+0x13c/0x1b0 drivers/nfc/virtual_ncidev.c:148 misc_open+0x30b/0x380 drivers/char/misc.c:165 chrdev_open+0x551/0x630 fs/char_dev.c:414 do_dentry_open+0x80f/0x1430 fs/open.c:929 do_open fs/namei.c:3639 [inline] path_openat+0x27bb/0x3180 fs/namei.c:3796 do_filp_open+0x234/0x490 fs/namei.c:3823 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_openat fs/open.c:1453 [inline] __se_sys_openat fs/open.c:1448 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1448 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888068af6000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 8 bytes inside of freed 2048-byte region [ffff888068af6000, ffff888068af6800) The buggy address belongs to the physical page: page:ffffea0001a2bc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x68af0 head:ffffea0001a2bc00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888012842000 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5061, tgid 5061 (syz-executor.3), ts 54340161050, free_ts 13757253849 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31db/0x3360 mm/page_alloc.c:3170 __alloc_pages+0x255/0x670 mm/page_alloc.c:4426 alloc_slab_page+0x6a/0x160 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x84/0x2f0 mm/slub.c:2070 ___slab_alloc+0xade/0x1100 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x1af/0x270 mm/slub.c:3517 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1114 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] device_create_groups_vargs drivers/base/core.c:4291 [inline] device_create+0x121/0x2e0 drivers/base/core.c:4348 macvtap_device_event+0x2f7/0x430 drivers/net/macvtap.c:176 notifier_call_chain+0x18c/0x3a0 kernel/notifier.c:93 call_netdevice_notifiers_info net/core/dev.c:1970 [inline] call_netdevice_notifiers_extack net/core/dev.c:2008 [inline] call_netdevice_notifiers+0x149/0x1c0 net/core/dev.c:2022 register_netdevice+0x10d7/0x1510 net/core/dev.c:10169 macvlan_common_newlink+0x1251/0x1a40 drivers/net/macvlan.c:1545 macvtap_newlink+0x154/0x1d0 drivers/net/macvtap.c:108 rtnl_newlink_create net/core/rtnetlink.c:3485 [inline] __rtnl_newlink net/core/rtnetlink.c:3705 [inline] rtnl_newlink+0x1579/0x2070 net/core/rtnetlink.c:3718 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405 free_contig_range+0x9e/0x150 mm/page_alloc.c:6342 destroy_args+0x95/0x7c0 mm/debug_vm_pgtable.c:1028 debug_vm_pgtable+0x4ac/0x540 mm/debug_vm_pgtable.c:1408 do_one_initcall+0x23d/0x7d0 init/main.c:1232 do_initcall_level+0x157/0x210 init/main.c:1294 do_initcalls+0x3f/0x80 init/main.c:1310 kernel_init_freeable+0x440/0x5d0 init/main.c:1547 kernel_init+0x1d/0x2a0 init/main.c:1437 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Memory state around the buggy address: ffff888068af5f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888068af5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888068af6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888068af6080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888068af6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================