================================================================== BUG: KASAN: use-after-free in mini_qdisc_pair_swap+0x1b9/0x1f0 net/sched/sch_generic.c:1576 Write of size 8 at addr ffff88807a5f1308 by task syz-executor.5/15645 CPU: 0 PID: 15645 Comm: syz-executor.5 Not tainted 5.18.0-rc4-syzkaller-01001-g2b68abf93365 #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: 0033:0x7fb5b52890e9 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:00007fb5b6341168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fb5b539c100 RCX: 00007fb5b52890e9 RDX: 040000000000009f RSI: 00000000200002c0 RDI: 0000000000000006 RBP: 00007fb5b52e308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcba4b27af R14: 00007fb5b6341300 R15: 0000000000022000 Allocated by task 15640: 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 8: 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 qdisc_put+0xcd/0xe0 net/sched/sch_generic.c:1086 shutdown_scheduler_queue net/sched/sch_generic.c:1464 [inline] netdev_for_each_tx_queue include/linux/netdevice.h:2393 [inline] dev_shutdown+0x11a/0x520 net/sched/sch_generic.c:1470 unregister_netdevice_many+0x7d3/0x1890 net/core/dev.c:10782 default_device_exit_batch+0x449/0x590 net/core/dev.c:11285 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:298 The buggy address belongs to the object at ffff88807a5f1000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 776 bytes inside of 1024-byte region [ffff88807a5f1000, ffff88807a5f1400) The buggy address belongs to the physical page: page:ffffea0001e97c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7a5f0 head:ffffea0001e97c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001e47a00 dead000000000002 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3866, tgid 3866 (syz-executor.1), ts 73610530140, free_ts 72812457075 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] __kmalloc_node+0x2cb/0x390 mm/slub.c:4458 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_dflt+0x71/0x4b0 net/sched/sch_generic.c:1000 attach_one_default_qdisc net/sched/sch_generic.c:1140 [inline] netdev_for_each_tx_queue include/linux/netdevice.h:2393 [inline] attach_default_qdiscs net/sched/sch_generic.c:1158 [inline] dev_activate+0x75d/0xcd0 net/sched/sch_generic.c:1216 __dev_open+0x388/0x4d0 net/core/dev.c:1439 __dev_change_flags+0x583/0x750 net/core/dev.c:8482 dev_change_flags+0x93/0x170 net/core/dev.c:8553 do_setlink+0x964/0x3ab0 net/core/rtnetlink.c:2774 __rtnl_newlink+0xd6a/0x17e0 net/core/rtnetlink.c:3540 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3587 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 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2523 qlink_free mm/kasan/quarantine.c:157 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:749 [inline] slab_alloc_node mm/slub.c:3217 [inline] slab_alloc mm/slub.c:3225 [inline] __kmalloc+0x200/0x350 mm/slub.c:4410 kmalloc include/linux/slab.h:586 [inline] load_elf_phdrs+0x103/0x210 fs/binfmt_elf.c:481 load_elf_binary+0x1dc/0x4ec0 fs/binfmt_elf.c:861 search_binary_handler fs/exec.c:1726 [inline] exec_binprm fs/exec.c:1767 [inline] bprm_execve fs/exec.c:1836 [inline] bprm_execve+0x7ef/0x1970 fs/exec.c:1798 kernel_execve+0x394/0x490 fs/exec.c:1997 call_usermodehelper_exec_async+0x2e3/0x580 kernel/umh.c:112 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Memory state around the buggy address: ffff88807a5f1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807a5f1280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807a5f1300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807a5f1380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807a5f1400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================