================================================================== BUG: KASAN: use-after-free in ieee80211_scan_rx+0x850/0x860 net/mac80211/scan.c:303 Read of size 4 at addr ffff88807e5e6a2c by task ksoftirqd/1/22 CPU: 1 PID: 22 Comm: ksoftirqd/1 Not tainted 5.18.0-syzkaller-11080-g664a393a2663 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x467 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 ieee80211_scan_rx+0x850/0x860 net/mac80211/scan.c:303 __ieee80211_rx_handle_packet net/mac80211/rx.c:4828 [inline] ieee80211_rx_list+0x1fff/0x2760 net/mac80211/rx.c:5021 ieee80211_rx_napi+0xdb/0x3d0 net/mac80211/rx.c:5044 ieee80211_rx include/net/mac80211.h:4679 [inline] ieee80211_tasklet_handler+0xd4/0x130 net/mac80211/main.c:235 tasklet_action_common.constprop.0+0x201/0x2e0 kernel/softirq.c:797 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 run_ksoftirqd kernel/softirq.c:934 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:926 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Allocated by task 19398: 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+0xa6/0xd0 mm/kasan/common.c:524 kasan_kmalloc include/linux/kasan.h:234 [inline] __do_kmalloc mm/slab.c:3696 [inline] __kmalloc+0x209/0x4d0 mm/slab.c:3705 kmalloc include/linux/slab.h:605 [inline] kzalloc include/linux/slab.h:733 [inline] cfg80211_conn_scan+0x195/0x1000 net/wireless/sme.c:80 cfg80211_sme_connect net/wireless/sme.c:585 [inline] cfg80211_connect+0x15d0/0x2020 net/wireless/sme.c:1255 nl80211_connect+0x1682/0x22e0 net/wireless/nl80211.c:11274 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2501 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x917/0xe10 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 ____sys_sendmsg+0x6eb/0x810 net/socket.c:2492 ___sys_sendmsg+0xf3/0x170 net/socket.c:2546 __sys_sendmsg net/socket.c:2575 [inline] __do_sys_sendmsg net/socket.c:2584 [inline] __se_sys_sendmsg net/socket.c:2582 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2582 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+0x46/0xb0 Freed by task 11142: 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+0x13d/0x180 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] __cache_free mm/slab.c:3425 [inline] kfree+0x113/0x310 mm/slab.c:3796 ___cfg80211_scan_done+0x482/0x970 net/wireless/scan.c:991 __cfg80211_scan_done+0x2c/0x40 net/wireless/scan.c:1008 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0x7e/0x90 mm/kasan/generic.c:348 call_rcu+0x99/0x790 kernel/rcu/tree.c:3126 free_fib_info net/ipv4/fib_semantics.c:256 [inline] fib_info_put include/net/ip_fib.h:578 [inline] fib_release_info+0x634/0x8d0 net/ipv4/fib_semantics.c:281 fib_table_delete+0x788/0xa40 net/ipv4/fib_trie.c:1772 fib_magic+0x321/0x540 net/ipv4/fib_frontend.c:1100 fib_del_ifaddr+0xc97/0x13c0 net/ipv4/fib_frontend.c:1311 fib_inetaddr_event+0xb4/0x2a0 net/ipv4/fib_frontend.c:1442 notifier_call_chain+0xb5/0x200 kernel/notifier.c:84 blocking_notifier_call_chain kernel/notifier.c:319 [inline] blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:307 __inet_del_ifa+0x415/0xf70 net/ipv4/devinet.c:431 inet_del_ifa net/ipv4/devinet.c:468 [inline] inetdev_destroy net/ipv4/devinet.c:321 [inline] inetdev_event+0x671/0x15d0 net/ipv4/devinet.c:1602 notifier_call_chain+0xb5/0x200 kernel/notifier.c:84 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1943 call_netdevice_notifiers_extack net/core/dev.c:1981 [inline] call_netdevice_notifiers net/core/dev.c:1995 [inline] unregister_netdevice_many+0x92e/0x1890 net/core/dev.c:10834 default_device_exit_batch+0x449/0x590 net/core/dev.c:11328 ops_exit_list+0x125/0x170 net/core/net_namespace.c:167 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0x7e/0x90 mm/kasan/generic.c:348 kvfree_call_rcu+0x74/0x990 kernel/rcu/tree.c:3647 drop_sysctl_table+0x3c0/0x4e0 fs/proc/proc_sysctl.c:1716 unregister_sysctl_table fs/proc/proc_sysctl.c:1754 [inline] unregister_sysctl_table+0xc0/0x190 fs/proc/proc_sysctl.c:1729 rds_tcp_exit_net+0x6f3/0xbb0 net/rds/tcp.c:636 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:162 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 The buggy address belongs to the object at ffff88807e5e6a00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 44 bytes inside of 256-byte region [ffff88807e5e6a00, ffff88807e5e6b00) The buggy address belongs to the physical page: page:ffffea0001f97980 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e5e6 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea000083ab88 ffffea0001d71fc8 ffff888010c40500 raw: 0000000000000000 ffff88807e5e6000 0000000100000008 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 0x3420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 5515, tgid 5507 (syz-executor.0), ts 212958427106, free_ts 142232632721 prep_new_page mm/page_alloc.c:2456 [inline] get_page_from_freelist+0x1290/0x3b70 mm/page_alloc.c:4198 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5426 __alloc_pages_node include/linux/gfp.h:587 [inline] kmem_getpages mm/slab.c:1363 [inline] cache_grow_begin+0x75/0x350 mm/slab.c:2569 cache_alloc_refill+0x27f/0x380 mm/slab.c:2942 ____cache_alloc mm/slab.c:3024 [inline] ____cache_alloc mm/slab.c:3007 [inline] __do_cache_alloc mm/slab.c:3253 [inline] slab_alloc mm/slab.c:3295 [inline] __do_kmalloc mm/slab.c:3694 [inline] __kmalloc+0x3b3/0x4d0 mm/slab.c:3705 kmalloc include/linux/slab.h:605 [inline] kzalloc include/linux/slab.h:733 [inline] new_dir fs/proc/proc_sysctl.c:978 [inline] get_subdir fs/proc/proc_sysctl.c:1022 [inline] __register_sysctl_table+0x9eb/0x10a0 fs/proc/proc_sysctl.c:1373 __addrconf_sysctl_register+0x1db/0x3d0 net/ipv6/addrconf.c:7079 addrconf_sysctl_register net/ipv6/addrconf.c:7126 [inline] addrconf_sysctl_register+0x139/0x1d0 net/ipv6/addrconf.c:7115 ipv6_add_dev+0xa0a/0x1290 net/ipv6/addrconf.c:450 addrconf_notify+0x614/0x1ba0 net/ipv6/addrconf.c:3532 notifier_call_chain+0xb5/0x200 kernel/notifier.c:84 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1943 call_netdevice_notifiers_extack net/core/dev.c:1981 [inline] call_netdevice_notifiers net/core/dev.c:1995 [inline] register_netdevice+0x109e/0x15b0 net/core/dev.c:10078 __ip_tunnel_create+0x398/0x5c0 net/ipv4/ip_tunnel.c:267 ip_tunnel_init_net+0x2e4/0x9d0 net/ipv4/ip_tunnel.c:1071 ops_init+0xaf/0x470 net/core/net_namespace.c:134 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1371 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1421 free_unref_page_prepare mm/page_alloc.c:3343 [inline] free_unref_page+0x19/0x6a0 mm/page_alloc.c:3438 kasan_depopulate_vmalloc_pte+0x5c/0x70 mm/kasan/shadow.c:359 apply_to_pte_range mm/memory.c:2625 [inline] apply_to_pmd_range mm/memory.c:2669 [inline] apply_to_pud_range mm/memory.c:2705 [inline] apply_to_p4d_range mm/memory.c:2741 [inline] __apply_to_page_range+0x686/0x1030 mm/memory.c:2775 kasan_release_vmalloc+0xa7/0xc0 mm/kasan/shadow.c:469 __purge_vmap_area_lazy+0x8f9/0x1c50 mm/vmalloc.c:1722 _vm_unmap_aliases.part.0+0x3f0/0x500 mm/vmalloc.c:2125 _vm_unmap_aliases mm/vmalloc.c:2099 [inline] vm_unmap_aliases+0x45/0x50 mm/vmalloc.c:2148 change_page_attr_set_clr+0x241/0x500 arch/x86/mm/pat/set_memory.c:1732 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1789 [inline] set_memory_ro+0x78/0xa0 arch/x86/mm/pat/set_memory.c:1980 bpf_prog_lock_ro include/linux/filter.h:883 [inline] bpf_prog_select_runtime+0x504/0x640 kernel/bpf/core.c:2236 bpf_prog_load+0xfe6/0x2250 kernel/bpf/syscall.c:2579 __sys_bpf+0x11a1/0x5700 kernel/bpf/syscall.c:4917 __do_sys_bpf kernel/bpf/syscall.c:5021 [inline] __se_sys_bpf kernel/bpf/syscall.c:5019 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:5019 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+0x46/0xb0 Memory state around the buggy address: ffff88807e5e6900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807e5e6980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88807e5e6a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807e5e6a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807e5e6b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================