==================================================================
BUG: KASAN: use-after-free in dump_schedule+0x68e/0x6f0 net/sched/sch_taprio.c:1849
Read of size 8 at addr ffff888018f312c0 by task syz-executor275/14436

CPU: 1 PID: 14436 Comm: syz-executor275 Not tainted 5.18.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x57/0x7d 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
 dump_schedule+0x68e/0x6f0 net/sched/sch_taprio.c:1849
 taprio_dump+0x431/0xb70 net/sched/sch_taprio.c:1918
 tc_fill_qdisc+0x570/0xf60 net/sched/sch_api.c:924
 qdisc_notify.isra.0+0x22e/0x2a0 net/sched/sch_api.c:990
 tc_modify_qdisc+0xc4d/0x1680 net/sched/sch_api.c:1633
 rtnetlink_rcv_msg+0x31d/0x8d0 net/core/rtnetlink.c:5993
 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x433/0x710 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x770/0xc20 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg+0xab/0xe0 net/socket.c:725
 sock_no_sendpage+0xea/0x130 net/core/sock.c:3106
 kernel_sendpage.part.0+0x151/0x550 net/socket.c:3492
 kernel_sendpage net/socket.c:3489 [inline]
 sock_sendpage+0xbd/0x190 net/socket.c:1007
 pipe_to_sendpage+0x245/0x410 fs/splice.c:364
 splice_from_pipe_feed fs/splice.c:418 [inline]
 __splice_from_pipe+0x362/0x810 fs/splice.c:562
 splice_from_pipe fs/splice.c:597 [inline]
 generic_splice_sendpage+0xba/0x120 fs/splice.c:746
 do_splice_from fs/splice.c:767 [inline]
 do_splice+0x9c8/0x1b00 fs/splice.c:1079
 __do_splice+0xf4/0x1b0 fs/splice.c:1144
 __do_sys_splice fs/splice.c:1350 [inline]
 __se_sys_splice fs/splice.c:1332 [inline]
 __x64_sys_splice+0x14a/0x200 fs/splice.c:1332
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f4beae5bc99
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 31 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4beafffc88 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f4beae5bc99
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000010976 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4beafffcc8
R13: 00007f4beafffce0 R14: 00007f4beafffd20 R15: 00000000000000c0
 </TASK>

Allocated by task 14431:
 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 include/linux/slab.h:581 [inline]
 kzalloc include/linux/slab.h:714 [inline]
 taprio_change+0x51b/0x3a80 net/sched/sch_taprio.c:1485
 qdisc_change net/sched/sch_api.c:1329 [inline]
 tc_modify_qdisc+0xafd/0x1680 net/sched/sch_api.c:1631
 rtnetlink_rcv_msg+0x31d/0x8d0 net/core/rtnetlink.c:5993
 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x433/0x710 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x770/0xc20 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg+0xab/0xe0 net/socket.c:725
 sock_no_sendpage+0xea/0x130 net/core/sock.c:3106
 kernel_sendpage.part.0+0x151/0x550 net/socket.c:3492
 kernel_sendpage net/socket.c:3489 [inline]
 sock_sendpage+0xbd/0x190 net/socket.c:1007
 pipe_to_sendpage+0x245/0x410 fs/splice.c:364
 splice_from_pipe_feed fs/splice.c:418 [inline]
 __splice_from_pipe+0x362/0x810 fs/splice.c:562
 splice_from_pipe fs/splice.c:597 [inline]
 generic_splice_sendpage+0xba/0x120 fs/splice.c:746
 do_splice_from fs/splice.c:767 [inline]
 do_splice+0x9c8/0x1b00 fs/splice.c:1079
 __do_splice+0xf4/0x1b0 fs/splice.c:1144
 __do_sys_splice fs/splice.c:1350 [inline]
 __se_sys_splice fs/splice.c:1332 [inline]
 __x64_sys_splice+0x14a/0x200 fs/splice.c:1332
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 0:
 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
 taprio_change+0x259a/0x3a80 net/sched/sch_taprio.c:1605
 qdisc_change net/sched/sch_api.c:1329 [inline]
 tc_modify_qdisc+0xafd/0x1680 net/sched/sch_api.c:1631
 rtnetlink_rcv_msg+0x31d/0x8d0 net/core/rtnetlink.c:5993
 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x433/0x710 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x770/0xc20 net/netlink/af_netlink.c:1921
 sock_sendmsg_nosec net/socket.c:705 [inline]
 sock_sendmsg+0xab/0xe0 net/socket.c:725
 sock_no_sendpage+0xea/0x130 net/core/sock.c:3106
 kernel_sendpage.part.0+0x151/0x550 net/socket.c:3492
 kernel_sendpage net/socket.c:3489 [inline]
 sock_sendpage+0xbd/0x190 net/socket.c:1007
 pipe_to_sendpage+0x245/0x410 fs/splice.c:364
 splice_from_pipe_feed fs/splice.c:418 [inline]
 __splice_from_pipe+0x362/0x810 fs/splice.c:562
 splice_from_pipe fs/splice.c:597 [inline]
 generic_splice_sendpage+0xba/0x120 fs/splice.c:746
 do_splice_from fs/splice.c:767 [inline]
 do_splice+0x9c8/0x1b00 fs/splice.c:1079
 __do_splice+0xf4/0x1b0 fs/splice.c:1144
 __do_sys_splice fs/splice.c:1350 [inline]
 __se_sys_splice fs/splice.c:1332 [inline]
 __x64_sys_splice+0x14a/0x200 fs/splice.c:1332
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff888018f31280
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 64 bytes inside of
 96-byte region [ffff888018f31280, ffff888018f312e0)

The buggy address belongs to the physical page:
page:ffffea000063cc40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f31
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 0000000000000000 dead000000000122 ffff888010041780
raw: 0000000000000000 0000000080200020 00000001ffffffff 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 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 26, tgid 26 (kworker/1:1), ts 430163053943, free_ts 430161824744
 prep_new_page mm/page_alloc.c:2441 [inline]
 get_page_from_freelist+0x178d/0x3dc0 mm/page_alloc.c:4182
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5408
 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+0x8e1/0xf20 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]
 dst_cow_metrics_generic+0x43/0x170 net/core/dst.c:199
 dst_metrics_write_ptr include/net/dst.h:119 [inline]
 dst_metric_set include/net/dst.h:180 [inline]
 icmp6_dst_alloc+0x447/0x600 net/ipv6/route.c:3274
 mld_sendpack+0x527/0xc70 net/ipv6/mcast.c:1807
 mld_send_initial_cr net/ipv6/mcast.c:1232 [inline]
 mld_dad_work+0x177/0x510 net/ipv6/mcast.c:2260
 process_one_work+0x865/0x13d0 kernel/workqueue.c:2289
 worker_thread+0x598/0xec0 kernel/workqueue.c:2436
 kthread+0x299/0x340 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
 tlb_batch_list_free mm/mmu_gather.c:62 [inline]
 tlb_finish_mmu+0x1f1/0x790 mm/mmu_gather.c:344
 exit_mmap+0x19d/0x3f0 mm/mmap.c:3142
 __mmput+0xed/0x430 kernel/fork.c:1184
 exit_mm kernel/exit.c:510 [inline]
 do_exit+0x8e9/0x2470 kernel/exit.c:782
 do_group_exit+0xb2/0x2a0 kernel/exit.c:925
 __do_sys_exit_group kernel/exit.c:936 [inline]
 __se_sys_exit_group kernel/exit.c:934 [inline]
 __x64_sys_exit_group+0x35/0x40 kernel/exit.c:934
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Memory state around the buggy address:
 ffff888018f31180: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff888018f31200: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff888018f31280: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                                           ^
 ffff888018f31300: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff888018f31380: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================