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BUG: KASAN: slab-out-of-bounds in dtSearch+0x1683/0x21b0
Read of size 1 at addr ffff88811870a488 by task syz.6.1741/21121

CPU: 1 UID: 0 PID: 21121 Comm: syz.6.1741 Not tainted syzkaller #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:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 dtSearch+0x1683/0x21b0
 jfs_lookup+0x155/0x380
 path_openat+0x1101/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1d8ed8efc9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1d8fb6f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f1d8efe5fa0 RCX: 00007f1d8ed8efc9
RDX: 000000000000275a RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f1d8ee11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1d8efe6038 R14: 00007f1d8efe5fa0 R15: 00007ffcfbf5b258
 </TASK>

Allocated by task 21121:
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_lru_noprof+0x35d/0x6d0
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 new_inode+0x22/0x170
 diReadSpecial+0x52/0x710
 jfs_mount+0x174/0x870
 jfs_fill_super+0x6bc/0xd80
 get_tree_bdev_flags+0x40e/0x4d0
 vfs_get_tree+0x92/0x2b0
 do_new_mount+0x302/0xa10
 __se_sys_mount+0x313/0x410
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888118709b78
 which belongs to the cache jfs_ip of size 2216
The buggy address is located 104 bytes to the right of
 allocated 2216-byte region [ffff888118709b78, ffff88811870a420)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88811870e4b8 pfn:0x118708
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888105688701
anon flags: 0x17ff00000000040(head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 017ff00000000040 ffff8881693993c0 0000000000000000 0000000000000001
raw: ffff88811870e4b8 00000000800d000c 00000000f5000000 ffff888105688701
head: 017ff00000000040 ffff8881693993c0 0000000000000000 0000000000000001
head: ffff88811870e4b8 00000000800d000c 00000000f5000000 ffff888105688701
head: 017ff00000000003 ffffea000461c201 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_RECLAIMABLE|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 10200, tgid 10198 (syz.7.439), ts 241935163829, free_ts 219140580415
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x2365/0x2440
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x96/0x350
 ___slab_alloc+0xe94/0x18a0
 __slab_alloc+0x65/0x100
 kmem_cache_alloc_lru_noprof+0x3ef/0x6d0
 jfs_alloc_inode+0x28/0x70
 alloc_inode+0x6a/0x1b0
 iget_locked+0x106/0x580
 jfs_iget+0x24/0x470
 jfs_fill_super+0x8ad/0xd80
 get_tree_bdev_flags+0x40e/0x4d0
 vfs_get_tree+0x92/0x2b0
 do_new_mount+0x302/0xa10
page last free pid 7214 tgid 7214 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 __put_partials+0x146/0x170
 put_cpu_partial+0x1f2/0x2e0
 __slab_free+0x2b9/0x390
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_node_noprof+0x433/0x710
 __alloc_skb+0x112/0x2d0
 inet_ifmcaddr_notify+0x7e/0x150
 __ip_mc_dec_group+0x40b/0x690
 inetdev_event+0x2a7/0x15b0
 notifier_call_chain+0x1b6/0x3e0
 netif_close_many+0x29c/0x410
 unregister_netdevice_many_notify+0xb29/0x2390
 default_device_exit_batch+0x819/0x890

Memory state around the buggy address:
 ffff88811870a380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88811870a400: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88811870a480: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00
                      ^
 ffff88811870a500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88811870a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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