netdevsim netdevsim0 eth0: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim0 eth1: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim0 eth2: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim0 eth3: set [1, 0] type 2 family 0 port 6081 - 0 ================================================================== BUG: KASAN: slab-use-after-free in __mutex_lock_common kernel/locking/mutex.c:625 [inline] BUG: KASAN: slab-use-after-free in __mutex_lock+0x154/0x1550 kernel/locking/mutex.c:821 Read of size 8 at addr ffff88801284baa8 by task kworker/u4:0/12 CPU: 0 UID: 0 PID: 12 Comm: kworker/u4:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: udp_tunnel_nic udp_tunnel_nic_device_sync_work Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 __mutex_lock_common kernel/locking/mutex.c:625 [inline] __mutex_lock+0x154/0x1550 kernel/locking/mutex.c:821 udp_tunnel_nic_device_sync_work+0x39/0xa20 net/ipv4/udp_tunnel_nic.c:737 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 5315: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5334 [inline] __kmalloc_noprof+0x358/0x750 mm/slub.c:5347 _kmalloc_noprof include/linux/slab.h:973 [inline] _kzalloc_noprof include/linux/slab.h:1286 [inline] udp_tunnel_nic_alloc net/ipv4/udp_tunnel_nic.c:756 [inline] udp_tunnel_nic_register net/ipv4/udp_tunnel_nic.c:833 [inline] udp_tunnel_nic_netdevice_event+0x4e9/0x1850 net/ipv4/udp_tunnel_nic.c:931 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2288 [inline] call_netdevice_notifiers net/core/dev.c:2302 [inline] register_netdevice+0x18a4/0x1eb0 net/core/dev.c:11477 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:1070 [inline] nsim_create+0xbd7/0x1140 drivers/net/netdevsim/netdev.c:1152 __nsim_dev_port_add+0x7f8/0xcd0 drivers/net/netdevsim/dev.c:1509 nsim_dev_port_add_all+0x37/0xf0 drivers/net/netdevsim/dev.c:1570 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1622 [inline] nsim_dev_reload_up+0x4dd/0x880 drivers/net/netdevsim/dev.c:1058 devlink_reload+0x4b2/0x890 net/devlink/dev.c:475 devlink_nl_reload_doit+0xa9c/0xc80 net/devlink/dev.c:585 genl_family_rcv_msg_doit+0x233/0x340 net/netlink/genetlink.c:1114 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline] genl_rcv_msg+0x614/0x7a0 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7bb/0x940 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0x9b9/0xa20 net/socket.c:2684 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2738 __sys_sendmsg net/socket.c:2770 [inline] __do_sys_sendmsg net/socket.c:2775 [inline] __se_sys_sendmsg net/socket.c:2773 [inline] __x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2773 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5316: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2700 [inline] slab_free mm/slub.c:6310 [inline] kfree+0x1c5/0x640 mm/slub.c:6625 udp_tunnel_nic_free net/ipv4/udp_tunnel_nic.c:785 [inline] udp_tunnel_nic_unregister net/ipv4/udp_tunnel_nic.c:910 [inline] udp_tunnel_nic_netdevice_event+0x1236/0x1850 net/ipv4/udp_tunnel_nic.c:942 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2288 [inline] call_netdevice_notifiers net/core/dev.c:2302 [inline] unregister_netdevice_many_notify+0x17de/0x2150 net/core/dev.c:12438 unregister_netdevice_many net/core/dev.c:12499 [inline] unregister_netdevice_queue+0x2f5/0x340 net/core/dev.c:12311 unregister_netdevice include/linux/netdevice.h:3462 [inline] nsim_destroy+0x26d/0x800 drivers/net/netdevsim/netdev.c:1194 __nsim_dev_port_del+0x14e/0x200 drivers/net/netdevsim/dev.c:1547 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1561 [inline] nsim_dev_reload_destroy+0x288/0x490 drivers/net/netdevsim/dev.c:1785 nsim_dev_reload_down+0x8a/0xc0 drivers/net/netdevsim/dev.c:1038 devlink_reload+0x1c5/0x890 net/devlink/dev.c:462 devlink_nl_reload_doit+0xa9c/0xc80 net/devlink/dev.c:585 genl_family_rcv_msg_doit+0x233/0x340 net/netlink/genetlink.c:1114 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline] genl_rcv_msg+0x614/0x7a0 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7bb/0x940 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0x9b9/0xa20 net/socket.c:2684 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2738 __sys_sendmsg net/socket.c:2770 [inline] __do_sys_sendmsg net/socket.c:2775 [inline] __se_sys_sendmsg net/socket.c:2773 [inline] __x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2773 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 insert_work+0x3d/0x330 kernel/workqueue.c:2226 __queue_work+0xba0/0x10a0 kernel/workqueue.c:2405 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2452 queue_work include/linux/workqueue.h:699 [inline] udp_tunnel_nic_device_sync net/ipv4/udp_tunnel_nic.c:307 [inline] __udp_tunnel_nic_add_port+0xba9/0xd90 net/ipv4/udp_tunnel_nic.c:523 udp_tunnel_nic_add_port include/net/udp_tunnel.h:402 [inline] udp_tunnel_push_rx_port+0x169/0x1f0 net/ipv4/udp_tunnel_core.c:109 geneve_offload_rx_ports+0xc7/0x150 drivers/net/geneve.c:1689 geneve_netdevice_event+0x6a/0x80 drivers/net/geneve.c:-1 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2288 [inline] call_netdevice_notifiers+0x90/0xd0 net/core/dev.c:2302 udp_tunnel_get_rx_info include/net/udp_tunnel.h:469 [inline] udp_tunnel_nic_register net/ipv4/udp_tunnel_nic.c:855 [inline] udp_tunnel_nic_netdevice_event+0xe33/0x1850 net/ipv4/udp_tunnel_nic.c:931 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2288 [inline] call_netdevice_notifiers net/core/dev.c:2302 [inline] register_netdevice+0x18a4/0x1eb0 net/core/dev.c:11477 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:1070 [inline] nsim_create+0xbd7/0x1140 drivers/net/netdevsim/netdev.c:1152 __nsim_dev_port_add+0x7f8/0xcd0 drivers/net/netdevsim/dev.c:1509 nsim_dev_port_add_all+0x37/0xf0 drivers/net/netdevsim/dev.c:1570 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1622 [inline] nsim_dev_reload_up+0x4dd/0x880 drivers/net/netdevsim/dev.c:1058 devlink_reload+0x4b2/0x890 net/devlink/dev.c:475 devlink_nl_reload_doit+0xa9c/0xc80 net/devlink/dev.c:585 genl_family_rcv_msg_doit+0x233/0x340 net/netlink/genetlink.c:1114 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline] genl_rcv_msg+0x614/0x7a0 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7bb/0x940 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0x9b9/0xa20 net/socket.c:2684 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2738 __sys_sendmsg net/socket.c:2770 [inline] __do_sys_sendmsg net/socket.c:2775 [inline] __se_sys_sendmsg net/socket.c:2773 [inline] __x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2773 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Second to last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 insert_work+0x3d/0x330 kernel/workqueue.c:2226 __queue_work+0xcd8/0x10a0 kernel/workqueue.c:2401 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2452 queue_work include/linux/workqueue.h:699 [inline] udp_tunnel_nic_device_sync net/ipv4/udp_tunnel_nic.c:307 [inline] __udp_tunnel_nic_add_port+0xba9/0xd90 net/ipv4/udp_tunnel_nic.c:523 udp_tunnel_nic_add_port include/net/udp_tunnel.h:402 [inline] udp_tunnel_push_rx_port+0x169/0x1f0 net/ipv4/udp_tunnel_core.c:109 geneve_offload_rx_ports+0xc7/0x150 drivers/net/geneve.c:1689 geneve_netdevice_event+0x6a/0x80 drivers/net/geneve.c:-1 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2288 [inline] call_netdevice_notifiers+0x90/0xd0 net/core/dev.c:2302 udp_tunnel_get_rx_info include/net/udp_tunnel.h:469 [inline] udp_tunnel_nic_register net/ipv4/udp_tunnel_nic.c:855 [inline] udp_tunnel_nic_netdevice_event+0xe33/0x1850 net/ipv4/udp_tunnel_nic.c:931 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2288 [inline] call_netdevice_notifiers net/core/dev.c:2302 [inline] register_netdevice+0x18a4/0x1eb0 net/core/dev.c:11477 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:1070 [inline] nsim_create+0xbd7/0x1140 drivers/net/netdevsim/netdev.c:1152 __nsim_dev_port_add+0x7f8/0xcd0 drivers/net/netdevsim/dev.c:1509 nsim_dev_port_add_all+0x37/0xf0 drivers/net/netdevsim/dev.c:1570 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1622 [inline] nsim_dev_reload_up+0x4dd/0x880 drivers/net/netdevsim/dev.c:1058 devlink_reload+0x4b2/0x890 net/devlink/dev.c:475 devlink_nl_reload_doit+0xa9c/0xc80 net/devlink/dev.c:585 genl_family_rcv_msg_doit+0x233/0x340 net/netlink/genetlink.c:1114 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline] genl_rcv_msg+0x614/0x7a0 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7bb/0x940 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0x9b9/0xa20 net/socket.c:2684 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2738 __sys_sendmsg net/socket.c:2770 [inline] __do_sys_sendmsg net/socket.c:2775 [inline] __se_sys_sendmsg net/socket.c:2773 [inline] __x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2773 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88801284ba00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 168 bytes inside of freed 256-byte region [ffff88801284ba00, ffff88801284bb00) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1284b flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801ac41b40 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800080008 00000000f5000000 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5279, tgid 5279 (syz-executor), ts 83082085954, free_ts 83038311823 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853 prep_new_page mm/page_alloc.c:1861 [inline] get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941 __alloc_pages_slowpath+0x3b0/0xd30 mm/page_alloc.c:4777 __alloc_frozen_pages_noprof+0x31f/0x380 mm/page_alloc.c:5234 alloc_slab_page mm/slub.c:3289 [inline] allocate_slab+0x74/0x5d0 mm/slub.c:3404 new_slab mm/slub.c:3447 [inline] ___slab_alloc+0x15b/0x970 mm/slub.c:4485 __slab_alloc_node mm/slub.c:4549 [inline] slab_alloc_node mm/slub.c:4927 [inline] __do_kmalloc_node mm/slub.c:5333 [inline] __kmalloc_node_noprof+0x300/0x7b0 mm/slub.c:5340 _kmalloc_node_noprof include/linux/slab.h:1174 [inline] alloc_slab_obj_exts+0xbf/0x250 mm/slub.c:2182 __memcg_slab_post_alloc_hook+0x5b6/0xe60 mm/memcontrol.c:3478 memcg_slab_post_alloc_hook mm/slub.c:2472 [inline] slab_post_alloc_hook mm/slub.c:4621 [inline] slab_alloc_node mm/slub.c:4939 [inline] __do_kmalloc_node mm/slub.c:5333 [inline] __kvmalloc_node_noprof+0x5fa/0x890 mm/slub.c:6833 allocate_hook_entries_size net/netfilter/core.c:54 [inline] nf_hook_entries_grow+0x287/0x740 net/netfilter/core.c:133 __nf_register_net_hook+0x2c9/0x930 net/netfilter/core.c:428 nf_register_net_hook+0xb2/0x190 net/netfilter/core.c:571 nf_register_net_hooks+0x44/0x1b0 net/netfilter/core.c:587 ebt_register_table+0xd0e/0x1190 net/bridge/netfilter/ebtables.c:1267 find_inlist_lock_noload+0x171/0x260 net/bridge/netfilter/ebtables.c:344 page last free pid 258 tgid 258 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1397 [inline] __free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938 __slab_free+0x274/0x2c0 mm/slub.c:5672 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4610 [inline] slab_alloc_node mm/slub.c:4939 [inline] __do_kmalloc_node mm/slub.c:5333 [inline] __kmalloc_noprof+0x312/0x750 mm/slub.c:5347 _kmalloc_noprof include/linux/slab.h:973 [inline] _kzalloc_noprof include/linux/slab.h:1286 [inline] fib6_info_alloc+0x30/0xf0 net/ipv6/ip6_fib.c:155 ip6_route_info_create+0x149/0x890 net/ipv6/route.c:3833 ip6_route_add+0x49/0x1b0 net/ipv6/route.c:3962 addrconf_add_mroute+0x2d1/0x370 net/ipv6/addrconf.c:2562 addrconf_add_dev net/ipv6/addrconf.c:2580 [inline] addrconf_dev_config net/ipv6/addrconf.c:3501 [inline] addrconf_init_auto_addrs+0x4d7/0xa50 net/ipv6/addrconf.c:3589 addrconf_notify+0xb1e/0x1050 net/ipv6/addrconf.c:3769 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85 netif_state_change+0x27d/0x3a0 net/core/dev.c:1603 __linkwatch_run_queue+0x52a/0x800 net/core/link_watch.c:240 linkwatch_event+0x4c/0x60 net/core/link_watch.c:314 Memory state around the buggy address: ffff88801284b980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801284ba00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801284ba80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801284bb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801284bb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================