================================================================== BUG: KASAN: use-after-free in mini_qdisc_pair_swap+0x1b9/0x1f0 net/sched/sch_generic.c:1576 Write of size 8 at addr ffff888054059b08 by task syz-executor.2/6053 CPU: 1 PID: 6053 Comm: syz-executor.2 Not tainted 5.18.0-rc5-syzkaller-01235-g949dfdcf343c #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/0x495 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 mini_qdisc_pair_swap+0x1b9/0x1f0 net/sched/sch_generic.c:1576 tcf_chain_head_change_item net/sched/cls_api.c:389 [inline] tcf_chain0_head_change.isra.0+0xb9/0x120 net/sched/cls_api.c:403 tcf_chain_tp_insert net/sched/cls_api.c:1677 [inline] tcf_chain_tp_insert_unique net/sched/cls_api.c:1726 [inline] tc_new_tfilter+0x1d5b/0x2200 net/sched/cls_api.c:2107 rtnetlink_rcv_msg+0x946/0xc90 net/core/rtnetlink.c:6074 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 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:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x334/0x810 net/socket.c:2422 ___sys_sendmsg+0xf3/0x170 net/socket.c:2476 __sys_sendmmsg+0x195/0x470 net/socket.c:2562 __do_sys_sendmmsg net/socket.c:2591 [inline] __se_sys_sendmmsg net/socket.c:2588 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2588 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+0x44/0xae RIP: 0033:0x7f2e584890e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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:00007f2e59551168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f2e5859c100 RCX: 00007f2e584890e9 RDX: 040000000000009f RSI: 00000000200002c0 RDI: 0000000000000006 RBP: 00007f2e584e308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa231bcaf R14: 00007f2e59551300 R15: 0000000000022000 Allocated by task 6050: 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+0xa9/0xd0 mm/kasan/common.c:524 kmalloc_node include/linux/slab.h:604 [inline] kzalloc_node include/linux/slab.h:725 [inline] qdisc_alloc+0xac/0xa10 net/sched/sch_generic.c:941 qdisc_create.constprop.0+0xce/0x10f0 net/sched/sch_api.c:1211 tc_modify_qdisc+0x4c5/0x1a00 net/sched/sch_api.c:1660 rtnetlink_rcv_msg+0x43a/0xc90 net/core/rtnetlink.c:6083 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 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:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x334/0x810 net/socket.c:2422 ___sys_sendmsg+0xf3/0x170 net/socket.c:2476 __sys_sendmmsg+0x195/0x470 net/socket.c:2562 __do_sys_sendmmsg net/socket.c:2591 [inline] __se_sys_sendmmsg net/socket.c:2588 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2588 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+0x44/0xae Freed by task 2966: 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+0x166/0x1a0 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1754 slab_free mm/slub.c:3510 [inline] kfree+0xd6/0x4d0 mm/slub.c:4552 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0x7b1/0x1880 kernel/rcu/tree.c:2786 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 Last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348 call_rcu+0x99/0x790 kernel/rcu/tree.c:3074 qdisc_put_unlocked+0x6f/0x90 net/sched/sch_generic.c:1101 tcf_block_release+0x86/0x90 net/sched/cls_api.c:1255 tc_new_tfilter+0xa46/0x2200 net/sched/cls_api.c:2169 rtnetlink_rcv_msg+0x946/0xc90 net/core/rtnetlink.c:6074 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 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:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x334/0x810 net/socket.c:2422 ___sys_sendmsg+0xf3/0x170 net/socket.c:2476 __sys_sendmmsg+0x195/0x470 net/socket.c:2562 __do_sys_sendmmsg net/socket.c:2591 [inline] __se_sys_sendmmsg net/socket.c:2588 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2588 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+0x44/0xae Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348 call_rcu+0x99/0x790 kernel/rcu/tree.c:3074 sctp_transport_destroy net/sctp/transport.c:171 [inline] sctp_transport_put+0x11d/0x180 net/sctp/transport.c:483 sctp_association_free+0x4cc/0x7d0 net/sctp/associola.c:382 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:944 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1328 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x3855/0x4f00 net/sctp/sm_sideeffect.c:1170 sctp_assoc_bh_rcv+0x386/0x6c0 net/sctp/associola.c:1054 sctp_inq_push+0x1d2/0x270 net/sctp/inqueue.c:80 sctp_backlog_rcv+0x196/0x5a0 net/sctp/input.c:344 sk_backlog_rcv include/net/sock.h:1050 [inline] __release_sock+0x134/0x3b0 net/core/sock.c:2832 release_sock+0x54/0x1b0 net/core/sock.c:3387 sctp_wait_for_connect+0x1cb/0x5d0 net/sctp/socket.c:9314 __sctp_connect+0x9a6/0xc30 net/sctp/socket.c:1244 sctp_connect net/sctp/socket.c:4807 [inline] sctp_inet_connect+0x15e/0x200 net/sctp/socket.c:4822 __sys_connect_file+0x14f/0x190 net/socket.c:1909 __sys_connect+0x161/0x190 net/socket.c:1926 __do_sys_connect net/socket.c:1936 [inline] __se_sys_connect net/socket.c:1933 [inline] __x64_sys_connect+0x6f/0xb0 net/socket.c:1933 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+0x44/0xae The buggy address belongs to the object at ffff888054059800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 776 bytes inside of 1024-byte region [ffff888054059800, ffff888054059c00) The buggy address belongs to the physical page: page:ffffea0001501600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x54058 head:ffffea0001501600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010c41dc0 raw: 0000000000000000 0000000000100010 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 8, tgid 8 (kworker/u4:0), ts 66800636264, free_ts 11656669792 prep_new_page mm/page_alloc.c:2441 [inline] get_page_from_freelist+0xba2/0x3e00 mm/page_alloc.c:4182 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5408 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2272 alloc_slab_page mm/slub.c:1799 [inline] allocate_slab+0x26c/0x3c0 mm/slub.c:1944 new_slab mm/slub.c:2004 [inline] ___slab_alloc+0x8df/0xf20 mm/slub.c:3005 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3092 slab_alloc_node mm/slub.c:3183 [inline] slab_alloc mm/slub.c:3225 [inline] kmem_cache_alloc_trace+0x310/0x3f0 mm/slub.c:3256 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:714 [inline] ieee802_11_parse_elems_crc+0xd5/0x1050 net/mac80211/util.c:1502 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2251 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1605 [inline] ieee80211_ibss_rx_queued_mgmt+0xda5/0x33f0 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline] ieee80211_iface_work+0xa78/0xd10 net/mac80211/iface.c:1581 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:298 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1356 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1406 free_unref_page_prepare mm/page_alloc.c:3328 [inline] free_unref_page+0x19/0x6a0 mm/page_alloc.c:3423 free_contig_range+0xb1/0x180 mm/page_alloc.c:9418 destroy_args+0xa8/0x646 mm/debug_vm_pgtable.c:1018 debug_vm_pgtable+0x2a51/0x2ae3 mm/debug_vm_pgtable.c:1332 do_one_initcall+0x103/0x650 init/main.c:1298 do_initcall_level init/main.c:1371 [inline] do_initcalls init/main.c:1387 [inline] do_basic_setup init/main.c:1406 [inline] kernel_init_freeable+0x6b1/0x73a init/main.c:1613 kernel_init+0x1a/0x1d0 init/main.c:1502 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Memory state around the buggy address: ffff888054059a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888054059a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888054059b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888054059b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888054059c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================