================================================================== BUG: KASAN: slab-use-after-free in mini_qdisc_pair_swap+0x19d/0x1f0 net/sched/sch_generic.c:1569 Read of size 8 at addr ffff888056d28000 by task kworker/u32:11/1253 CPU: 3 UID: 0 PID: 1253 Comm: kworker/u32:11 Not tainted 6.14.0-syzkaller-03565-gf6e0150b2003 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xc3/0x670 mm/kasan/report.c:521 kasan_report+0xe0/0x110 mm/kasan/report.c:634 mini_qdisc_pair_swap+0x19d/0x1f0 net/sched/sch_generic.c:1569 tcf_chain_head_change_item net/sched/cls_api.c:522 [inline] tcf_chain0_head_change_cb_del+0x1a5/0x3e0 net/sched/cls_api.c:969 tcf_block_put_ext+0xb4/0x1c0 net/sched/cls_api.c:1559 clsact_destroy+0x2c0/0x9b0 net/sched/sch_ingress.c:302 __qdisc_destroy+0x106/0x4a0 net/sched/sch_generic.c:1078 qdisc_put+0xab/0xe0 net/sched/sch_generic.c:1106 shutdown_scheduler_queue+0xa5/0x160 net/sched/sch_generic.c:1159 dev_shutdown+0x175/0x430 net/sched/sch_generic.c:1493 unregister_netdevice_many_notify+0x9ec/0x1fa0 net/core/dev.c:11875 unregister_netdevice_many net/core/dev.c:11950 [inline] unregister_netdevice_queue+0x305/0x3f0 net/core/dev.c:11820 unregister_netdevice include/linux/netdevice.h:3337 [inline] nsim_destroy+0x135/0x710 drivers/net/netdevsim/netdev.c:1021 __nsim_dev_port_del+0x189/0x240 drivers/net/netdevsim/dev.c:1428 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1440 [inline] nsim_dev_reload_destroy+0x10a/0x4d0 drivers/net/netdevsim/dev.c:1661 nsim_dev_reload_down+0x6e/0xd0 drivers/net/netdevsim/dev.c:968 devlink_reload+0x19e/0x7c0 net/devlink/dev.c:461 devlink_pernet_pre_exit+0x1a0/0x2b0 net/devlink/core.c:509 ops_pre_exit_list net/core/net_namespace.c:162 [inline] cleanup_net+0x494/0xb30 net/core/net_namespace.c:632 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c1/0xef0 kernel/workqueue.c:3400 kthread+0x3a4/0x760 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 25274: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4318 [inline] __kmalloc_node_track_caller_noprof+0x221/0x510 mm/slub.c:4337 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:537 __alloc_skb+0x166/0x380 net/core/skbuff.c:606 alloc_skb include/linux/skbuff.h:1331 [inline] nlmsg_new include/net/netlink.h:1018 [inline] audit_buffer_alloc kernel/audit.c:1795 [inline] audit_log_start+0x2e0/0x7d0 kernel/audit.c:1913 common_lsm_audit+0xe8/0x22b0 security/lsm_audit.c:452 slow_avc_audit+0x186/0x210 security/selinux/avc.c:779 avc_audit security/selinux/include/avc.h:127 [inline] avc_has_perm+0x18b/0x1c0 security/selinux/avc.c:1198 selinux_socket_sock_rcv_skb+0x43f/0x720 security/selinux/hooks.c:5211 security_sock_rcv_skb+0x1e3/0x210 security/security.c:4781 sk_filter_trim_cap+0xd1/0xac0 net/core/filter.c:151 tcp_filter net/ipv4/tcp_ipv4.c:2144 [inline] tcp_v4_rcv+0x28ff/0x4390 net/ipv4/tcp_ipv4.c:2332 ip_protocol_deliver_rcu+0xba/0x4c0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x316/0x570 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:469 [inline] ip_sublist_rcv_finish+0x2c1/0x620 net/ipv4/ip_input.c:578 ip_list_rcv_finish+0x552/0x720 net/ipv4/ip_input.c:627 ip_sublist_rcv net/ipv4/ip_input.c:635 [inline] ip_list_rcv+0x335/0x450 net/ipv4/ip_input.c:669 __netif_receive_skb_list_ptype net/core/dev.c:5939 [inline] __netif_receive_skb_list_core+0x752/0x950 net/core/dev.c:5986 __netif_receive_skb_list net/core/dev.c:6038 [inline] netif_receive_skb_list_internal+0x752/0xdb0 net/core/dev.c:6129 gro_normal_list include/net/gro.h:518 [inline] gro_normal_one include/net/gro.h:531 [inline] napi_skb_finish net/core/gro.c:602 [inline] napi_gro_receive+0x9ff/0xc40 net/core/gro.c:632 e1000_receive_skb drivers/net/ethernet/intel/e1000/e1000_main.c:4012 [inline] e1000_clean_rx_irq+0x6b0/0x1160 drivers/net/ethernet/intel/e1000/e1000_main.c:4465 e1000_clean+0x9c8/0x2670 drivers/net/ethernet/intel/e1000/e1000_main.c:3807 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:7190 napi_poll net/core/dev.c:7259 [inline] net_rx_action+0xa97/0x1010 net/core/dev.c:7381 handle_softirqs+0x216/0x8e0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 common_interrupt+0xbf/0xe0 arch/x86/kernel/irq.c:285 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 Freed by task 40: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2376 [inline] slab_free mm/slub.c:4633 [inline] kfree+0x2b6/0x4d0 mm/slub.c:4832 skb_kfree_head net/core/skbuff.c:996 [inline] skb_free_head+0x108/0x1d0 net/core/skbuff.c:1008 skb_release_data+0x56d/0x740 net/core/skbuff.c:1035 skb_release_all net/core/skbuff.c:1100 [inline] __kfree_skb net/core/skbuff.c:1114 [inline] sk_skb_reason_drop+0x129/0x1a0 net/core/skbuff.c:1152 kfree_skb_reason include/linux/skbuff.h:1271 [inline] kfree_skb include/linux/skbuff.h:1280 [inline] kauditd_hold_skb+0x13f/0x250 kernel/audit.c:611 kauditd_send_queue+0x236/0x290 kernel/audit.c:766 kauditd_thread+0x623/0xa70 kernel/audit.c:890 kthread+0x3a4/0x760 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff888056d28000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 0 bytes inside of freed 2048-byte region [ffff888056d28000, ffff888056d28800) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x56d28 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801b442f00 ffffea0000968a00 dead000000000002 raw: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000 head: 00fff00000000040 ffff88801b442f00 ffffea0000968a00 dead000000000002 head: 0000000000000000 0000000000080008 00000000f5000000 0000000000000000 head: 00fff00000000003 ffffea00015b4a01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 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 12100, tgid 12100 (syz-executor), ts 247416285127, free_ts 247316791527 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x10c4/0x34c0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x223/0x24d0 mm/page_alloc.c:4740 alloc_pages_mpol+0x1fb/0x540 mm/mempolicy.c:2301 alloc_slab_page mm/slub.c:2446 [inline] allocate_slab mm/slub.c:2610 [inline] new_slab+0x23c/0x330 mm/slub.c:2663 ___slab_alloc+0xd9c/0x1940 mm/slub.c:3849 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3939 __slab_alloc_node mm/slub.c:4014 [inline] slab_alloc_node mm/slub.c:4175 [inline] __kmalloc_cache_noprof+0xfb/0x3e0 mm/slub.c:4344 kmalloc_noprof include/linux/slab.h:902 [inline] kzalloc_noprof include/linux/slab.h:1036 [inline] device_create_groups_vargs+0x8a/0x270 drivers/base/core.c:4330 device_create+0xed/0x130 drivers/base/core.c:4387 mac80211_hwsim_new_radio+0x369/0x54b0 drivers/net/wireless/virtual/mac80211_hwsim.c:5204 hwsim_new_radio_nl+0xb51/0x12c0 drivers/net/wireless/virtual/mac80211_hwsim.c:6240 genl_family_rcv_msg_doit+0x206/0x2f0 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x55c/0x800 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x16a/0x440 net/netlink/af_netlink.c:2533 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 page last free pid 12100 tgid 12100 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_frozen_pages+0x6d8/0xf40 mm/page_alloc.c:2660 discard_slab mm/slub.c:2707 [inline] __put_partials+0x16d/0x1c0 mm/slub.c:3176 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4138 [inline] slab_alloc_node mm/slub.c:4187 [inline] kmem_cache_alloc_node_noprof+0x1d5/0x3b0 mm/slub.c:4239 __alloc_skb+0x2b2/0x380 net/core/skbuff.c:596 alloc_skb include/linux/skbuff.h:1331 [inline] netlink_alloc_large_skb+0x69/0x130 net/netlink/af_netlink.c:1186 netlink_sendmsg+0x694/0xd70 net/netlink/af_netlink.c:1857 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:733 [inline] __sys_sendto+0x495/0x510 net/socket.c:2187 __do_sys_sendto net/socket.c:2194 [inline] __se_sys_sendto net/socket.c:2190 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2190 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888056d27f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888056d27f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888056d28000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888056d28080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888056d28100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================