==================================================================
BUG: KASAN: slab-use-after-free in advance_sched+0xc20/0xca0 net/sched/sch_taprio.c:942
Read of size 8 at addr ffff888024af7510 by task syz-executor.0/23613

CPU: 0 PID: 23613 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-05271-gf99c5f563c17 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 advance_sched+0xc20/0xca0 net/sched/sch_taprio.c:942
 __run_hrtimer kernel/time/hrtimer.c:1692 [inline]
 __hrtimer_run_queues+0x595/0xd00 kernel/time/hrtimer.c:1756
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x107/0x3a0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x35/0x90 kernel/kcov.c:311
Code: 0c 25 80 ce 03 00 65 8b 05 20 d9 6e 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 57 83 b9 14 16 00 00 00 74 4e 8b 81 f0 15 00 00 <83> f8 03 75 43 48 8b 91 f8 15 00 00 44 8b 89 f4 15 00 00 49 c1 e1
RSP: 0018:ffffc900035dfd98 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88807529b350 RCX: ffff888075299e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900035dfec8 R08: ffffffff81c90de2 R09: 1ffffffff1f0d5cd
R10: dffffc0000000000 R11: fffffbfff1f0d5ce R12: 0000000000000000
R13: ffffc900035dffd8 R14: 00000000ffffffff R15: 0000000000000000
 rseq_get_rseq_cs kernel/rseq.c:161 [inline]
 rseq_ip_fixup kernel/rseq.c:281 [inline]
 __rseq_handle_notify_resume+0x172/0x1490 kernel/rseq.c:329
 rseq_handle_notify_resume include/linux/rseq.h:38 [inline]
 resume_user_mode_work include/linux/resume_user_mode.h:62 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0x114/0x360 kernel/entry/common.c:212
 do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f9bf66a9275
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007fff54693080 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: 0000000000000000 RBX: 0000000000000081 RCX: 00007f9bf66a9275
RDX: 00007fff546930c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fff5469314c R08: 0000000000000000 R09: 00007f9bf738c0b0
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 000000000007ec85 R14: 000000000007ec3c R15: 0000000000000018
 </TASK>

Allocated by task 24552:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 kmalloc_trace+0x1d9/0x360 mm/slub.c:4012
 kmalloc include/linux/slab.h:590 [inline]
 kzalloc include/linux/slab.h:711 [inline]
 taprio_change+0x1030/0x42d0 net/sched/sch_taprio.c:1862
 qdisc_change net/sched/sch_api.c:1416 [inline]
 tc_modify_qdisc+0x190d/0x1e40 net/sched/sch_api.c:1746
 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2559
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
 netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
 ___sys_sendmsg net/socket.c:2638 [inline]
 __sys_sendmmsg+0x3b2/0x740 net/socket.c:2724
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2750
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Freed by task 19698:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:589
 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2121 [inline]
 slab_free mm/slub.c:4299 [inline]
 kfree+0x14a/0x380 mm/slub.c:4409
 rcu_do_batch kernel/rcu/tree.c:2196 [inline]
 rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2471
 __do_softirq+0x2bc/0x943 kernel/softirq.c:554

Last potentially related work creation:
 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:551
 __call_rcu_common kernel/rcu/tree.c:2734 [inline]
 call_rcu+0x167/0xa70 kernel/rcu/tree.c:2838
 taprio_change+0x32d9/0x42d0 net/sched/sch_taprio.c:1972
 qdisc_change net/sched/sch_api.c:1416 [inline]
 tc_modify_qdisc+0x190d/0x1e40 net/sched/sch_api.c:1746
 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2559
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
 netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
 ___sys_sendmsg net/socket.c:2638 [inline]
 __sys_sendmmsg+0x3b2/0x740 net/socket.c:2724
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2750
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

The buggy address belongs to the object at ffff888024af7400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 272 bytes inside of
 freed 512-byte region [ffff888024af7400, ffff888024af7600)

The buggy address belongs to the physical page:
page:ffffea000092bd00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x24af4
head:ffffea000092bd00 order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888014c41c80 dead000000000100 dead000000000122
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5082, tgid 5082 (syz-executor.0), ts 55797251688, free_ts 55656475488
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
 prep_new_page mm/page_alloc.c:1540 [inline]
 get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311
 __alloc_pages+0x256/0x680 mm/page_alloc.c:4569
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 alloc_slab_page+0x5f/0x160 mm/slub.c:2190
 allocate_slab mm/slub.c:2354 [inline]
 new_slab+0x84/0x2f0 mm/slub.c:2407
 ___slab_alloc+0xd1b/0x13e0 mm/slub.c:3540
 __slab_alloc mm/slub.c:3625 [inline]
 __slab_alloc_node mm/slub.c:3678 [inline]
 slab_alloc_node mm/slub.c:3850 [inline]
 __do_kmalloc_node mm/slub.c:3980 [inline]
 __kmalloc+0x2e3/0x4a0 mm/slub.c:3994
 kmalloc include/linux/slab.h:594 [inline]
 kzalloc include/linux/slab.h:711 [inline]
 alloc_workqueue+0x1b0/0x20c0 kernel/workqueue.c:5542
 wg_newlink+0x1a8/0x640 drivers/net/wireguard/device.c:333
 rtnl_newlink_create net/core/rtnetlink.c:3494 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3714 [inline]
 rtnl_newlink+0x158f/0x20a0 net/core/rtnetlink.c:3727
 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2559
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
 netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191
page last free pid 5079 tgid 5079 stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1140 [inline]
 free_unref_page_prepare+0x968/0xa90 mm/page_alloc.c:2346
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2486
 __slab_free+0x349/0x410 mm/slub.c:4211
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x5e/0xc0 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3813 [inline]
 slab_alloc_node mm/slub.c:3860 [inline]
 kmalloc_trace+0x16d/0x360 mm/slub.c:4007
 kmalloc include/linux/slab.h:590 [inline]
 kzalloc include/linux/slab.h:711 [inline]
 ref_tracker_alloc+0x14b/0x490 lib/ref_tracker.c:203
 __netdev_tracker_alloc include/linux/netdevice.h:4064 [inline]
 netdev_hold include/linux/netdevice.h:4093 [inline]
 rx_queue_add_kobject net/core/net-sysfs.c:1102 [inline]
 net_rx_queue_update_kobjects+0x16b/0x5b0 net/core/net-sysfs.c:1160
 register_queue_kobjects net/core/net-sysfs.c:1895 [inline]
 netdev_register_kobject+0x224/0x320 net/core/net-sysfs.c:2140
 register_netdevice+0x1208/0x1a20 net/core/dev.c:10277
 veth_newlink+0x84f/0xcd0 drivers/net/veth.c:1859
 rtnl_newlink_create net/core/rtnetlink.c:3494 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3714 [inline]
 rtnl_newlink+0x158f/0x20a0 net/core/rtnetlink.c:3727
 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2559
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361

Memory state around the buggy address:
 ffff888024af7400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888024af7480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888024af7500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff888024af7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888024af7600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess):
   0:	0c 25                	or     $0x25,%al
   2:	80 ce 03             	or     $0x3,%dh
   5:	00 65 8b             	add    %ah,-0x75(%rbp)
   8:	05 20 d9 6e 7e       	add    $0x7e6ed920,%eax
   d:	a9 00 01 ff 00       	test   $0xff0100,%eax
  12:	74 10                	je     0x24
  14:	a9 00 01 00 00       	test   $0x100,%eax
  19:	74 57                	je     0x72
  1b:	83 b9 14 16 00 00 00 	cmpl   $0x0,0x1614(%rcx)
  22:	74 4e                	je     0x72
  24:	8b 81 f0 15 00 00    	mov    0x15f0(%rcx),%eax
* 2a:	83 f8 03             	cmp    $0x3,%eax <-- trapping instruction
  2d:	75 43                	jne    0x72
  2f:	48 8b 91 f8 15 00 00 	mov    0x15f8(%rcx),%rdx
  36:	44 8b 89 f4 15 00 00 	mov    0x15f4(%rcx),%r9d
  3d:	49                   	rex.WB
  3e:	c1                   	.byte 0xc1
  3f:	e1                   	.byte 0xe1