==================================================================
BUG: KASAN: slab-use-after-free in taprio_dump_tc_entries net/sched/sch_taprio.c:2231 [inline]
BUG: KASAN: slab-use-after-free in taprio_dump+0xa7b/0xb90 net/sched/sch_taprio.c:2276
Read of size 4 at addr ffff8880264f74c0 by task syz-executor.5/15444

CPU: 0 PID: 15444 Comm: syz-executor.5 Not tainted 6.3.0-rc2-syzkaller-00047-g6015b1aca1a2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319
 print_report mm/kasan/report.c:430 [inline]
 kasan_report+0x11c/0x130 mm/kasan/report.c:536
 taprio_dump_tc_entries net/sched/sch_taprio.c:2231 [inline]
 taprio_dump+0xa7b/0xb90 net/sched/sch_taprio.c:2276
 tc_fill_qdisc+0x60b/0x1290 net/sched/sch_api.c:944
 qdisc_notify.isra.0+0x2c7/0x330 net/sched/sch_api.c:1016
 tc_modify_qdisc+0xfd7/0x1a40 net/sched/sch_api.c:1653
 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6174
 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2574
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:747
 sock_no_sendpage+0x10c/0x160 net/core/sock.c:3235
 kernel_sendpage.part.0+0x1d5/0x700 net/socket.c:3580
 kernel_sendpage net/socket.c:3577 [inline]
 sock_sendpage+0xe7/0x180 net/socket.c:1080
 pipe_to_sendpage+0x2b1/0x380 fs/splice.c:454
 splice_from_pipe_feed fs/splice.c:508 [inline]
 __splice_from_pipe+0x449/0x8a0 fs/splice.c:652
 splice_from_pipe fs/splice.c:687 [inline]
 generic_splice_sendpage+0xd8/0x140 fs/splice.c:835
 do_splice_from fs/splice.c:856 [inline]
 do_splice+0xb5b/0x1960 fs/splice.c:1165
 __do_splice+0x134/0x250 fs/splice.c:1230
 __do_sys_splice fs/splice.c:1437 [inline]
 __se_sys_splice fs/splice.c:1419 [inline]
 __x64_sys_splice+0x19c/0x250 fs/splice.c:1419
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f29f8c88a39
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f29f9e68188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 00007f29f8d8bf60 RCX: 00007f29f8c88a39
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f29f8ce2c5f R08: 0000000000010976 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcef27024f R14: 00007f29f9e68300 R15: 0000000000022000
 </TASK>

Allocated by task 15420:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 ____kasan_kmalloc mm/kasan/common.c:333 [inline]
 __kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:383
 kmalloc include/linux/slab.h:580 [inline]
 kzalloc include/linux/slab.h:720 [inline]
 taprio_change+0x612/0x47f0 net/sched/sch_taprio.c:1824
 qdisc_change net/sched/sch_api.c:1356 [inline]
 tc_modify_qdisc+0xe4e/0x1a40 net/sched/sch_api.c:1651
 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6174
 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2574
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:747
 sock_no_sendpage+0x10c/0x160 net/core/sock.c:3235
 kernel_sendpage.part.0+0x1d5/0x700 net/socket.c:3580
 kernel_sendpage net/socket.c:3577 [inline]
 sock_sendpage+0xe7/0x180 net/socket.c:1080
 pipe_to_sendpage+0x2b1/0x380 fs/splice.c:454
 splice_from_pipe_feed fs/splice.c:508 [inline]
 __splice_from_pipe+0x449/0x8a0 fs/splice.c:652
 splice_from_pipe fs/splice.c:687 [inline]
 generic_splice_sendpage+0xd8/0x140 fs/splice.c:835
 do_splice_from fs/splice.c:856 [inline]
 do_splice+0xb5b/0x1960 fs/splice.c:1165
 __do_splice+0x134/0x250 fs/splice.c:1230
 __do_sys_splice fs/splice.c:1437 [inline]
 __se_sys_splice fs/splice.c:1419 [inline]
 __x64_sys_splice+0x19c/0x250 fs/splice.c:1419
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 15441:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521
 ____kasan_slab_free mm/kasan/common.c:236 [inline]
 ____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200
 kasan_slab_free include/linux/kasan.h:162 [inline]
 __cache_free mm/slab.c:3390 [inline]
 __do_kmem_cache_free mm/slab.c:3577 [inline]
 __kmem_cache_free+0xcd/0x2c0 mm/slab.c:3584
 rcu_do_batch kernel/rcu/tree.c:2112 [inline]
 rcu_core+0x814/0x1960 kernel/rcu/tree.c:2372
 __do_softirq+0x1d4/0x905 kernel/softirq.c:571

Last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:491
 __call_rcu_common.constprop.0+0x99/0x7e0 kernel/rcu/tree.c:2622
 taprio_change+0x30b4/0x47f0 net/sched/sch_taprio.c:1934
 qdisc_change net/sched/sch_api.c:1356 [inline]
 tc_modify_qdisc+0xe4e/0x1a40 net/sched/sch_api.c:1651
 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6174
 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2574
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:747
 sock_no_sendpage+0x10c/0x160 net/core/sock.c:3235
 kernel_sendpage.part.0+0x1d5/0x700 net/socket.c:3580
 kernel_sendpage net/socket.c:3577 [inline]
 sock_sendpage+0xe7/0x180 net/socket.c:1080
 pipe_to_sendpage+0x2b1/0x380 fs/splice.c:454
 splice_from_pipe_feed fs/splice.c:508 [inline]
 __splice_from_pipe+0x449/0x8a0 fs/splice.c:652
 splice_from_pipe fs/splice.c:687 [inline]
 generic_splice_sendpage+0xd8/0x140 fs/splice.c:835
 do_splice_from fs/splice.c:856 [inline]
 do_splice+0xb5b/0x1960 fs/splice.c:1165
 __do_splice+0x134/0x250 fs/splice.c:1230
 __do_sys_splice fs/splice.c:1437 [inline]
 __se_sys_splice fs/splice.c:1419 [inline]
 __x64_sys_splice+0x19c/0x250 fs/splice.c:1419
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Second to last potentially related work creation:
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0x7b/0x90 mm/kasan/generic.c:491
 __call_rcu_common.constprop.0+0x99/0x7e0 kernel/rcu/tree.c:2622
 taprio_change+0x30b4/0x47f0 net/sched/sch_taprio.c:1934
 qdisc_change net/sched/sch_api.c:1356 [inline]
 tc_modify_qdisc+0xe4e/0x1a40 net/sched/sch_api.c:1651
 rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6174
 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2574
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:747
 sock_no_sendpage+0x10c/0x160 net/core/sock.c:3235
 kernel_sendpage.part.0+0x1d5/0x700 net/socket.c:3580
 kernel_sendpage net/socket.c:3577 [inline]
 sock_sendpage+0xe7/0x180 net/socket.c:1080
 pipe_to_sendpage+0x2b1/0x380 fs/splice.c:454
 splice_from_pipe_feed fs/splice.c:508 [inline]
 __splice_from_pipe+0x449/0x8a0 fs/splice.c:652
 splice_from_pipe fs/splice.c:687 [inline]
 generic_splice_sendpage+0xd8/0x140 fs/splice.c:835
 do_splice_from fs/splice.c:856 [inline]
 do_splice+0xb5b/0x1960 fs/splice.c:1165
 __do_splice+0x134/0x250 fs/splice.c:1230
 __do_sys_splice fs/splice.c:1437 [inline]
 __se_sys_splice fs/splice.c:1419 [inline]
 __x64_sys_splice+0x19c/0x250 fs/splice.c:1419
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff8880264f7400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 192 bytes inside of
 freed 512-byte region [ffff8880264f7400, ffff8880264f7600)

The buggy address belongs to the physical page:
page:ffffea0000993dc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880264f7800 pfn:0x264f7
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffff888012440600 ffffea0000ac0e10 ffffea00008aa9d0
raw: ffff8880264f7800 ffff8880264f7000 0000000100000003 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 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 2199, tgid 2199 (kworker/u4:0), ts 11036747630, free_ts 11035616921
 prep_new_page mm/page_alloc.c:2552 [inline]
 get_page_from_freelist+0x1190/0x2e20 mm/page_alloc.c:4325
 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:5591
 __alloc_pages_node include/linux/gfp.h:237 [inline]
 kmem_getpages mm/slab.c:1360 [inline]
 cache_grow_begin+0x9b/0x3b0 mm/slab.c:2570
 cache_alloc_refill+0x27f/0x380 mm/slab.c:2943
 ____cache_alloc mm/slab.c:3019 [inline]
 ____cache_alloc mm/slab.c:3002 [inline]
 __do_cache_alloc mm/slab.c:3202 [inline]
 slab_alloc_node mm/slab.c:3250 [inline]
 __kmem_cache_alloc_node+0x360/0x3f0 mm/slab.c:3541
 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1061
 kmalloc include/linux/slab.h:580 [inline]
 kzalloc include/linux/slab.h:720 [inline]
 alloc_bprm+0x51/0x900 fs/exec.c:1511
 kernel_execve+0xaf/0x500 fs/exec.c:1985
 call_usermodehelper_exec_async+0x260/0x4e0 kernel/umh.c:110
 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:1453 [inline]
 free_pcp_prepare+0x5d5/0xa50 mm/page_alloc.c:1503
 free_unref_page_prepare mm/page_alloc.c:3387 [inline]
 free_unref_page_list+0x176/0xbc0 mm/page_alloc.c:3528
 release_pages+0xcd7/0x1380 mm/swap.c:1042
 tlb_batch_pages_flush+0xa8/0x1a0 mm/mmu_gather.c:97
 tlb_flush_mmu_free mm/mmu_gather.c:292 [inline]
 tlb_flush_mmu mm/mmu_gather.c:299 [inline]
 tlb_finish_mmu+0x14b/0x7e0 mm/mmu_gather.c:391
 exit_mmap+0x205/0x690 mm/mmap.c:3047
 __mmput+0x128/0x4c0 kernel/fork.c:1209
 mmput+0x60/0x70 kernel/fork.c:1231
 free_bprm+0x144/0x3e0 fs/exec.c:1489
 kernel_execve+0x3fe/0x500 fs/exec.c:2022
 call_usermodehelper_exec_async+0x260/0x4e0 kernel/umh.c:110
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Memory state around the buggy address:
 ffff8880264f7380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880264f7400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880264f7480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff8880264f7500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880264f7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================