==================================================================
BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x31a/0x360 net/rose/rose_timer.c:174
Read of size 2 at addr ffff8880334c3c2a by task syz-executor.3/32487

CPU: 1 PID: 32487 Comm: syz-executor.3 Not tainted 6.9.0-rc6-syzkaller-01468-g173e7622ccb3 #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+0x241/0x360 lib/dump_stack.c:114
 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
 rose_timer_expiry+0x31a/0x360 net/rose/rose_timer.c:174
 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1793
 expire_timers kernel/time/timer.c:1844 [inline]
 __run_timers kernel/time/timer.c:2418 [inline]
 __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2429
 run_timer_base kernel/time/timer.c:2438 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2448
 __do_softirq+0x2c6/0x980 kernel/softirq.c:554
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:645
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 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:unwind_next_frame+0x794/0x2a00 arch/x86/kernel/unwind_orc.c:512
Code: 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 4d 89 f7 0f 85 5b 1a 00 00 0f b7 5d 00 c1 eb 0b 80 e3 01 48 8b 44 24 78 42 0f b6 04 28 <84> c0 4c 8b 74 24 48 0f 85 5e 1a 00 00 88 1a 48 89 6c 24 28 0f b7
RSP: 0018:ffffc90011097328 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8880539e8000
RDX: ffffc90011097435 RSI: ffffffff8e1a2f80 RDI: 0000000000000002
RBP: ffffffff90312fa4 R08: 0000000000000003 R09: ffffffff81415632
R10: 0000000000000002 R11: ffff8880539e8000 R12: ffffffff8fbd69cc
R13: dffffc0000000000 R14: 1ffff92002212e80 R15: 1ffff92002212e80
 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 save_stack+0xfb/0x1f0 mm/page_owner.c:156
 __set_page_owner+0x8d/0x810 mm/page_owner.c:325
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534
 prep_new_page mm/page_alloc.c:1541 [inline]
 get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317
 __alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575
 alloc_pages_mpol+0x3e8/0x680 mm/mempolicy.c:2264
 vm_area_alloc_pages mm/vmalloc.c:3561 [inline]
 __vmalloc_area_node mm/vmalloc.c:3637 [inline]
 __vmalloc_node_range+0x9a4/0x1490 mm/vmalloc.c:3818
 vmalloc_user+0x74/0x80 mm/vmalloc.c:3972
 kcov_ioctl+0x59/0x630 kernel/kcov.c:704
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:904 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe8f8c7da0b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007ffe4b912ac0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fe8f8c7da0b
RDX: 0000000000040000 RSI: ffffffff80086301 RDI: 00000000000000e1
RBP: 00007fe8f8dac768 R08: 00000000000000da R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe4b9131f8
R13: 0000000000000003 R14: 00007fe8f8dac768 R15: 0000000000000009
 </TASK>

Allocated by task 31555:
 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+0x1db/0x360 mm/slub.c:3997
 kmalloc include/linux/slab.h:628 [inline]
 kzalloc include/linux/slab.h:749 [inline]
 mca_alloc net/ipv6/mcast.c:880 [inline]
 __ipv6_dev_mc_inc+0x426/0xa90 net/ipv6/mcast.c:936
 ipv6_add_dev+0xe0c/0x1220 net/ipv6/addrconf.c:468
 addrconf_notify+0x6a7/0x1020 net/ipv6/addrconf.c:3652
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
 call_netdevice_notifiers_extack net/core/dev.c:2031 [inline]
 call_netdevice_notifiers net/core/dev.c:2045 [inline]
 register_netdevice+0x15b2/0x1a20 net/core/dev.c:10401
 veth_newlink+0x628/0xcd0 drivers/net/veth.c:1829
 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:6579
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2564
 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
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2199
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 17194:
 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:579
 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:2106 [inline]
 slab_free_freelist_hook mm/slub.c:2135 [inline]
 slab_free_bulk mm/slub.c:4293 [inline]
 kmem_cache_free_bulk+0x1f8/0x360 mm/slub.c:4507
 kfree_bulk include/linux/slab.h:545 [inline]
 kvfree_rcu_bulk+0x24b/0x4e0 kernel/rcu/tree.c:3033
 kvfree_rcu_drain_ready kernel/rcu/tree.c:3207 [inline]
 kfree_rcu_monitor+0x8a4/0x1020 kernel/rcu/tree.c:3225
 process_one_work kernel/workqueue.c:3267 [inline]
 process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3348
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3429
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

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:541
 kvfree_call_rcu+0xfc/0x790 kernel/rcu/tree.c:3443
 ipv6_mc_destroy_dev+0x3b2/0x570 net/ipv6/mcast.c:2810
 addrconf_ifdown+0x16dc/0x1bc0 net/ipv6/addrconf.c:3998
 addrconf_notify+0x3cb/0x1020
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
 call_netdevice_notifiers_extack net/core/dev.c:2031 [inline]
 call_netdevice_notifiers net/core/dev.c:2045 [inline]
 unregister_netdevice_many_notify+0xd9b/0x16e0 net/core/dev.c:11220
 unregister_netdevice_many net/core/dev.c:11278 [inline]
 default_device_exit_batch+0xa0f/0xa90 net/core/dev.c:11761
 ops_exit_list net/core/net_namespace.c:175 [inline]
 cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:637
 process_one_work kernel/workqueue.c:3267 [inline]
 process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3348
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3429
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

The buggy address belongs to the object at ffff8880334c3c00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
 freed 512-byte region [ffff8880334c3c00, ffff8880334c3e00)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x334c0
head: order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888015041c80 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
head: 00fff00000000840 ffff888015041c80 0000000000000000 dead000000000001
head: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
head: 00fff00000000002 ffffea0000cd3001 ffffea0000cd3048 00000000ffffffff
head: 0000000400000000 0000000000000000 00000000ffffffff 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 9601, tgid -1715349281 (syz-executor.0), ts 9601, free_ts 320302780489
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534
 prep_new_page mm/page_alloc.c:1541 [inline]
 get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317
 __alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575
 __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:2175
 allocate_slab mm/slub.c:2338 [inline]
 new_slab+0x84/0x2f0 mm/slub.c:2391
 ___slab_alloc+0xc73/0x1260 mm/slub.c:3525
 __slab_alloc mm/slub.c:3610 [inline]
 __slab_alloc_node mm/slub.c:3663 [inline]
 slab_alloc_node mm/slub.c:3835 [inline]
 __do_kmalloc_node mm/slub.c:3965 [inline]
 __kmalloc+0x2e5/0x4a0 mm/slub.c:3979
 kmalloc include/linux/slab.h:632 [inline]
 kzalloc include/linux/slab.h:749 [inline]
 fib6_info_alloc+0x2e/0xf0 net/ipv6/ip6_fib.c:155
 ip6_route_info_create+0x445/0x12b0 net/ipv6/route.c:3759
 addrconf_f6i_alloc+0x3c2/0x7f0 net/ipv6/route.c:4583
 ipv6_add_addr+0x5b6/0x1090 net/ipv6/addrconf.c:1120
 inet6_addr_add+0x563/0xb00 net/ipv6/addrconf.c:3059
 inet6_rtm_newaddr+0x8a3/0xc80 net/ipv6/addrconf.c:5047
 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6579
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2564
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
page last free pid 5110 tgid 5110 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1141 [inline]
 free_unref_page_prepare+0x986/0xab0 mm/page_alloc.c:2347
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487
 __slab_free+0x31b/0x3d0 mm/slub.c:4192
 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:3798 [inline]
 slab_alloc_node mm/slub.c:3845 [inline]
 __do_kmalloc_node mm/slub.c:3965 [inline]
 __kmalloc+0x1e2/0x4a0 mm/slub.c:3979
 kmalloc include/linux/slab.h:632 [inline]
 tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_number_perm+0x23a/0x880 security/tomoyo/file.c:723
 security_file_ioctl+0x75/0xb0 security/security.c:2764
 __do_sys_ioctl fs/ioctl.c:898 [inline]
 __se_sys_ioctl+0x47/0x170 fs/ioctl.c:890
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff8880334c3b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880334c3b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880334c3c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff8880334c3c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880334c3d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
   0:	89 d8                	mov    %ebx,%eax
   2:	48 c1 e8 03          	shr    $0x3,%rax
   6:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax
   b:	84 c0                	test   %al,%al
   d:	4d 89 f7             	mov    %r14,%r15
  10:	0f 85 5b 1a 00 00    	jne    0x1a71
  16:	0f b7 5d 00          	movzwl 0x0(%rbp),%ebx
  1a:	c1 eb 0b             	shr    $0xb,%ebx
  1d:	80 e3 01             	and    $0x1,%bl
  20:	48 8b 44 24 78       	mov    0x78(%rsp),%rax
  25:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax
* 2a:	84 c0                	test   %al,%al <-- trapping instruction
  2c:	4c 8b 74 24 48       	mov    0x48(%rsp),%r14
  31:	0f 85 5e 1a 00 00    	jne    0x1a95
  37:	88 1a                	mov    %bl,(%rdx)
  39:	48 89 6c 24 28       	mov    %rbp,0x28(%rsp)
  3e:	0f                   	.byte 0xf
  3f:	b7                   	.byte 0xb7