================================================================== BUG: KASAN: use-after-free in mini_qdisc_pair_swap+0x1a9/0x1c0 net/sched/sch_generic.c:1573 Write of size 8 at addr ffff888083333b08 by task syz-executor.3/10246 CPU: 0 PID: 10246 Comm: syz-executor.3 Not tainted 6.2.0-rc8-syzkaller-00021-ge1c04510f521 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 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:306 [inline] print_report+0x163/0x4f0 mm/kasan/report.c:417 kasan_report+0x13a/0x170 mm/kasan/report.c:517 mini_qdisc_pair_swap+0x1a9/0x1c0 net/sched/sch_generic.c:1573 tcf_chain_head_change_item net/sched/cls_api.c:391 [inline] tcf_chain0_head_change net/sched/cls_api.c:405 [inline] tcf_chain_tp_insert net/sched/cls_api.c:1679 [inline] tcf_chain_tp_insert_unique+0xb06/0xce0 net/sched/cls_api.c:1728 tc_new_tfilter+0x1674/0x1ad0 net/sched/cls_api.c:2111 rtnetlink_rcv_msg+0x815/0xe90 net/core/rtnetlink.c:6132 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2574 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x7c3/0x990 net/netlink/af_netlink.c:1365 netlink_sendmsg+0xa02/0xd10 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x5a2/0x8f0 net/socket.c:2476 ___sys_sendmsg net/socket.c:2530 [inline] __sys_sendmmsg+0x3af/0x730 net/socket.c:2616 __do_sys_sendmmsg net/socket.c:2645 [inline] __se_sys_sendmmsg net/socket.c:2642 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2642 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: 0033:0x7f324a08c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3248bfe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f324a1abf80 RCX: 00007f324a08c0f9 RDX: 040000000000009f RSI: 00000000200002c0 RDI: 0000000000000006 RBP: 00007f324a0e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffefd4aa32f R14: 00007f3248bfe300 R15: 0000000000022000 Allocated by task 10249: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x80 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x9b/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:968 [inline] __kmalloc_node+0xb3/0x190 mm/slab_common.c:975 kmalloc_node include/linux/slab.h:610 [inline] kzalloc_node include/linux/slab.h:731 [inline] qdisc_alloc+0x94/0x950 net/sched/sch_generic.c:938 qdisc_create+0x189/0x1130 net/sched/sch_api.c:1236 tc_modify_qdisc+0x9a5/0x1a50 net/sched/sch_api.c:1678 rtnetlink_rcv_msg+0x7c7/0xe90 net/core/rtnetlink.c:6141 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2574 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x7c3/0x990 net/netlink/af_netlink.c:1365 netlink_sendmsg+0xa02/0xd10 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x5a2/0x8f0 net/socket.c:2476 ___sys_sendmsg net/socket.c:2530 [inline] __sys_sendmmsg+0x3af/0x730 net/socket.c:2616 __do_sys_sendmmsg net/socket.c:2645 [inline] __se_sys_sendmmsg net/socket.c:2642 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2642 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 10080: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x80 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:523 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0x264/0x3c0 mm/slub.c:3800 rcu_do_batch kernel/rcu/tree.c:2246 [inline] rcu_core+0xa9e/0x17a0 kernel/rcu/tree.c:2506 __do_softirq+0x308/0xb15 kernel/softirq.c:571 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:493 __call_rcu_common kernel/rcu/tree.c:2755 [inline] call_rcu+0x167/0xac0 kernel/rcu/tree.c:2868 qdisc_put_unlocked+0x59/0x90 net/sched/sch_generic.c:1097 tcf_block_release net/sched/cls_api.c:1257 [inline] tc_new_tfilter+0x1f3/0x1ad0 net/sched/cls_api.c:2176 rtnetlink_rcv_msg+0x815/0xe90 net/core/rtnetlink.c:6132 netlink_rcv_skb+0x1df/0x430 net/netlink/af_netlink.c:2574 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x7c3/0x990 net/netlink/af_netlink.c:1365 netlink_sendmsg+0xa02/0xd10 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x5a2/0x8f0 net/socket.c:2476 ___sys_sendmsg net/socket.c:2530 [inline] __sys_sendmmsg+0x3af/0x730 net/socket.c:2616 __do_sys_sendmmsg net/socket.c:2645 [inline] __se_sys_sendmmsg net/socket.c:2642 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2642 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 ffff888083333800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 776 bytes inside of 1024-byte region [ffff888083333800, ffff888083333c00) The buggy address belongs to the physical page: page:ffffea00020ccc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888083337800 pfn:0x83330 head:ffffea00020ccc00 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012441dc0 ffffea0001e7c010 ffffea0001ec0e10 raw: ffff888083337800 000000000010000f 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 0x152a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 5848, tgid 5848 (kworker/u4:16), ts 465328418848, free_ts 464681834819 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x3449/0x35c0 mm/page_alloc.c:4283 __alloc_pages+0x291/0x7e0 mm/page_alloc.c:5549 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1b8/0x2a0 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0xa2/0x1a0 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] ieee802_11_parse_elems_full+0x112/0x2a40 net/mac80211/util.c:1619 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2260 [inline] ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2267 [inline] ieee80211_bss_info_update+0x99c/0xef0 net/mac80211/scan.c:212 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x19a0/0x2e00 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1583 [inline] ieee80211_iface_work+0x7bd/0xd00 net/mac80211/iface.c:1637 process_one_work+0x8fa/0x1370 kernel/workqueue.c:2289 worker_thread+0xa63/0x1210 kernel/workqueue.c:2436 kthread+0x270/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare mm/page_alloc.c:1496 [inline] free_unref_page_prepare+0xf3a/0x1040 mm/page_alloc.c:3369 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3464 discard_slab mm/slub.c:2098 [inline] __unfreeze_partials+0x1b1/0x1f0 mm/slub.c:2637 put_cpu_partial+0x116/0x180 mm/slub.c:2713 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x68/0x390 mm/slab.h:761 slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x14c/0x2a0 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0xa2/0x1a0 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] allocate_probes kernel/tracepoint.c:109 [inline] func_remove kernel/tracepoint.c:267 [inline] tracepoint_remove_func kernel/tracepoint.c:403 [inline] tracepoint_probe_unregister+0x248/0x960 kernel/tracepoint.c:551 bpf_raw_tp_link_release+0x63/0x90 kernel/bpf/syscall.c:3144 bpf_link_free kernel/bpf/syscall.c:2727 [inline] bpf_link_put+0x238/0x2c0 kernel/bpf/syscall.c:2753 bpf_link_release+0x3b/0x40 kernel/bpf/syscall.c:2762 __fput+0x3b7/0x890 fs/file_table.c:320 task_work_run+0x24a/0x300 kernel/task_work.c:179 Memory state around the buggy address: ffff888083333a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888083333a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888083333b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888083333b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888083333c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================