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BUG: KASAN: slab-use-after-free in lbmIODone+0x1312/0x16c0
Read of size 4 at addr ffff88810ce86408 by task ktimers/0/16

CPU: 0 UID: 0 PID: 16 Comm: ktimers/0 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 print_address_description+0x55/0x1e0
 print_report+0x58/0x70
 kasan_report+0x117/0x150
 lbmIODone+0x1312/0x16c0
 blk_update_request+0x57e/0xe60
 blk_mq_end_request+0x3e/0x70
 blk_done_softirq+0x10a/0x160
 handle_softirqs+0x1de/0x6d0
 run_ktimerd+0x69/0x100
 smpboot_thread_fn+0x541/0xa50
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Allocated by task 19494:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x3a6/0x690
 lmLogInit+0x3e5/0x1a00
 lmLogOpen+0x4e1/0xfa0
 jfs_mount_rw+0xee/0x670
 jfs_fill_super+0x754/0xd80
 get_tree_bdev_flags+0x431/0x4f0
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x341/0xd30
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 1820:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x1c5/0x6c0
 lmLogShutdown+0x456/0x850
 lmLogClose+0x28a/0x520
 jfs_umount+0x2fb/0x3d0
 jfs_put_super+0x8c/0x190
 generic_shutdown_super+0x13d/0x2d0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xf3/0x4d0
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88810ce86400
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 8 bytes inside of
 freed 256-byte region [ffff88810ce86400, ffff88810ce86500)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10ce86
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x100000000000040(head|node=0|zone=2)
page_type: f5(slab)
raw: 0100000000000040 ffff888100041b40 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 0100000000000040 ffff888100041b40 dead000000000100 dead000000000122
head: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000
head: 0100000000000001 ffffffffffffff81 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000002
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5595, tgid 5595 (syz-executor), ts 68380849893, free_ts 68197193197
 post_alloc_hook+0x1f9/0x250
 get_page_from_freelist+0x27d6/0x2850
 __alloc_frozen_pages_noprof+0x18d/0x380
 allocate_slab+0x74/0x5e0
 refill_objects+0x33c/0x3d0
 __pcs_replace_empty_main+0x373/0x720
 __kmalloc_noprof+0x530/0x7b0
 fib_create_info+0x1723/0x31f0
 fib_table_insert+0xc8/0x1b50
 fib_magic+0x434/0x510
 fib_add_ifaddr+0x38d/0x5f0
 fib_netdev_event+0x382/0x490
 notifier_call_chain+0x1ad/0x3d0
 __dev_notify_flags+0x1a9/0x310
 netif_change_flags+0xe8/0x1a0
 do_setlink+0xfa5/0x45a0
page last free pid 21 tgid 21 stack trace:
 __free_frozen_pages+0x1075/0x11b0
 rcu_cpu_kthread+0x99e/0x1470
 smpboot_thread_fn+0x541/0xa50
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30

Memory state around the buggy address:
 ffff88810ce86300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88810ce86380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88810ce86400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff88810ce86480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810ce86500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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