veth1_macvtap: left promiscuous mode veth0_macvtap: left promiscuous mode veth1_vlan: left promiscuous mode veth0_vlan: left promiscuous mode pimreg (unregistering): left allmulticast mode bond1 (unregistering): Released all slaves ================================================================== BUG: KASAN: slab-use-after-free in tcx_uninstall+0x5cc/0x630 kernel/bpf/tcx.c:107 Read of size 8 at addr ffff888036448208 by task kworker/u4:5/13854 CPU: 1 PID: 13854 Comm: kworker/u4:5 Not tainted 6.5.0-rc2-next-20230720-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 tcx_uninstall+0x5cc/0x630 kernel/bpf/tcx.c:107 dev_tcx_uninstall include/net/tcx.h:174 [inline] unregister_netdevice_many_notify+0x5e7/0x1a20 net/core/dev.c:10899 unregister_netdevice_many net/core/dev.c:10964 [inline] default_device_exit_batch+0x584/0x740 net/core/dev.c:11417 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175 cleanup_net+0x505/0xb20 net/core/net_namespace.c:614 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600 worker_thread+0x687/0x1110 kernel/workqueue.c:2751 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 RIP: 0000:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 6791: kasan_save_stack+0x33/0x50 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+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1024 [inline] __kmalloc_node_track_caller+0x61/0x100 mm/slab_common.c:1044 kmalloc_reserve+0xef/0x270 net/core/skbuff.c:575 __alloc_skb+0x12b/0x330 net/core/skbuff.c:644 alloc_skb include/linux/skbuff.h:1289 [inline] igmpv3_newpack+0x1b0/0x11b0 net/ipv4/igmp.c:359 add_grhead+0x266/0x300 net/ipv4/igmp.c:440 add_grec+0xd8b/0x11e0 net/ipv4/igmp.c:574 igmpv3_send_cr net/ipv4/igmp.c:672 [inline] igmp_ifc_timer_expire+0x90b/0x1050 net/ipv4/igmp.c:810 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb10 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x218/0x965 kernel/softirq.c:553 Freed by task 6791: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x15e/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826 slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0xb8/0x2f0 mm/slub.c:3822 skb_kfree_head net/core/skbuff.c:894 [inline] skb_free_head+0x110/0x1b0 net/core/skbuff.c:906 skb_release_data+0x5ba/0x870 net/core/skbuff.c:936 skb_release_all net/core/skbuff.c:1002 [inline] __kfree_skb net/core/skbuff.c:1016 [inline] kfree_skb_reason+0x101/0x210 net/core/skbuff.c:1052 kfree_skb include/linux/skbuff.h:1237 [inline] igmpv3_newpack+0xe02/0x11b0 net/ipv4/igmp.c:373 add_grhead+0x266/0x300 net/ipv4/igmp.c:440 add_grec+0xd8b/0x11e0 net/ipv4/igmp.c:574 igmpv3_send_cr net/ipv4/igmp.c:672 [inline] igmp_ifc_timer_expire+0x90b/0x1050 net/ipv4/igmp.c:810 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb10 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x218/0x965 kernel/softirq.c:553 Last potentially related work creation: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:2653 keypair_free_kref drivers/net/wireguard/noise.c:128 [inline] kref_put include/linux/kref.h:65 [inline] wg_noise_keypair_put+0x132/0x370 drivers/net/wireguard/noise.c:139 add_new_keypair drivers/net/wireguard/noise.c:237 [inline] wg_noise_handshake_begin_session+0x628/0xe80 drivers/net/wireguard/noise.c:845 wg_receive_handshake_packet+0x745/0xbd0 drivers/net/wireguard/receive.c:176 wg_packet_handshake_receive_worker+0x17f/0x3a0 drivers/net/wireguard/receive.c:213 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600 worker_thread+0x687/0x1110 kernel/workqueue.c:2751 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296 Second to last potentially related work creation: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492 kvfree_call_rcu+0x70/0xbe0 kernel/rcu/tree.c:3372 tcx_entry_free include/net/tcx.h:96 [inline] ingress_destroy+0x39f/0x520 net/sched/sch_ingress.c:127 qdisc_create+0xa57/0x10a0 net/sched/sch_api.c:1360 tc_modify_qdisc+0xab3/0x1bf0 net/sched/sch_api.c:1703 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6423 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2546 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x539/0x800 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x93c/0xe30 net/netlink/af_netlink.c:1911 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:748 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2494 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2548 __sys_sendmsg+0x117/0x1e0 net/socket.c:2577 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888036448000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 520 bytes inside of freed 2048-byte region [ffff888036448000, ffff888036448800) The buggy address belongs to the physical page: page:ffffea0000d91200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x36448 head:ffffea0000d91200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 1138, tgid 1138 (kworker/0:2), ts 182468749716, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d2/0x350 mm/page_alloc.c:1569 prep_new_page mm/page_alloc.c:1576 [inline] get_page_from_freelist+0x10d7/0x31b0 mm/page_alloc.c:3256 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4512 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2279 alloc_slab_page mm/slub.c:1870 [inline] allocate_slab+0x24e/0x380 mm/slub.c:2017 new_slab mm/slub.c:2070 [inline] ___slab_alloc+0x8bc/0x1570 mm/slub.c:3223 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322 __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x137/0x350 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1023 [inline] __kmalloc_node_track_caller+0x50/0x100 mm/slab_common.c:1044 kmalloc_reserve+0xef/0x270 net/core/skbuff.c:575 __alloc_skb+0x12b/0x330 net/core/skbuff.c:644 alloc_skb include/linux/skbuff.h:1289 [inline] alloc_skb_with_frags+0x9d/0x700 net/core/skbuff.c:6233 sock_alloc_send_pskb+0x7c8/0x950 net/core/sock.c:2773 sock_alloc_send_skb include/net/sock.h:1871 [inline] mld_newpack.isra.0+0x1ee/0x790 net/ipv6/mcast.c:1746 add_grhead+0x295/0x340 net/ipv6/mcast.c:1849 add_grec+0x10bb/0x1680 net/ipv6/mcast.c:1987 page_owner free stack trace missing Memory state around the buggy address: ffff888036448100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888036448180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888036448200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888036448280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888036448300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================