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BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x471/0x4b0
Read of size 2 at addr ffff888109aa482a by task syz.3.3352/21552

CPU: 1 UID: 0 PID: 21552 Comm: syz.3.3352 Not tainted 6.17.0-rc1-syzkaller-00036-gdfc0f6373094 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <IRQ>
 dump_stack_lvl+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 rose_timer_expiry+0x471/0x4b0
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:page_table_check_clear+0x308/0x700
Code: 89 f6 e8 eb 6d 91 ff 45 85 f6 0f 85 50 02 00 00 49 8d 7f 04 be 04 00 00 00 e8 84 d5 f4 ff 41 be ff ff ff ff f0 45 0f c1 77 04 <41> 8d 76 ff 31 ff e8 bd 6d 91 ff 41 ff ce 0f 88 2a 02 00 00 e8 6f
RSP: 0018:ffffc90009b97350 EFLAGS: 00000213
RAX: ffffffff822e4101 RBX: 0000000000113d02 RCX: ffffffff822e41fc
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff8881019310ec
RBP: ffff8881019310a0 R08: ffff8881019310ef R09: 1ffff1102032621d
R10: dffffc0000000000 R11: ffffed102032621e R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000003 R15: ffff8881019310e8
 unmap_page_range+0x3445/0x4370
 unmap_vmas+0x399/0x580
 exit_mmap+0x248/0xb50
 __mmput+0x118/0x420
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f979718ebe9
Code: Unable to access opcode bytes at 0x7f979718ebbf.
RSP: 002b:00007f979800e0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f97973b5fa8 RCX: 00007f979718ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f97973b5fa8
RBP: 00007f97973b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f97973b6038 R14: 00007ffd00a9f2d0 R15: 00007ffd00a9f3b8
 </TASK>

Allocated by task 21080:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 tomoyo_find_next_domain+0xdc/0x1aa0
 tomoyo_bprm_check_security+0x11c/0x180
 security_bprm_check+0x89/0x270
 bprm_execve+0x8ee/0x1450
 kernel_execve+0x8f0/0x9f0
 call_usermodehelper_exec_async+0x210/0x360
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30

Freed by task 21080:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x18e/0x440
 tomoyo_find_next_domain+0x173e/0x1aa0
 tomoyo_bprm_check_security+0x11c/0x180
 security_bprm_check+0x89/0x270
 bprm_execve+0x8ee/0x1450
 kernel_execve+0x8f0/0x9f0
 call_usermodehelper_exec_async+0x210/0x360
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30

The buggy address belongs to the object at ffff888109aa4800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
 freed 512-byte region [ffff888109aa4800, ffff888109aa4a00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888109aa7c00 pfn:0x109aa4
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000240(workingset|head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000240 ffff88801a441c80 ffffea00047c3910 ffffea000486d510
raw: ffff888109aa7c00 000000000010000e 00000000f5000000 0000000000000000
head: 057ff00000000240 ffff88801a441c80 ffffea00047c3910 ffffea000486d510
head: ffff888109aa7c00 000000000010000e 00000000f5000000 0000000000000000
head: 057ff00000000002 ffffea000426a901 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
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 5715, tgid 5715 (kworker/u8:2), ts 58783162935, free_ts 58613128417
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x8a/0x370
 ___slab_alloc+0xbeb/0x1410
 __kmalloc_cache_noprof+0x296/0x3d0
 __ipv6_dev_mc_inc+0x44f/0xa50
 addrconf_dad_work+0x3d0/0x14b0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
page last free pid 5846 tgid 5846 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 __slab_free+0x303/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 __kmalloc_cache_noprof+0x1be/0x3d0
 ref_tracker_alloc+0x133/0x460
 fib_create_info+0x22f1/0x3210
 fib_table_insert+0xc6/0x1b50
 fib_magic+0x2c4/0x390
 fib_add_ifaddr+0x144/0x5f0
 fib_inetaddr_event+0x12e/0x190
 notifier_call_chain+0x1b6/0x3e0
 blocking_notifier_call_chain+0x6a/0x90
 __inet_insert_ifa+0xa13/0xbf0
 inet_rtm_newaddr+0xf3a/0x18b0

Memory state around the buggy address:
 ffff888109aa4700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888109aa4780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888109aa4800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff888109aa4880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888109aa4900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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