(kworker/u4:10,3000,0):ocfs2_read_blocks_sync:112 ERROR: status = -12
(kworker/u4:10,3000,0):ocfs2_read_locked_inode:521 ERROR: status = -12
==================================================================
BUG: KASAN: slab-out-of-bounds in ocfs2_check_dir_entry fs/ocfs2/dir.c:305 [inline]
BUG: KASAN: slab-out-of-bounds in ocfs2_dir_foreach_blk_id fs/ocfs2/dir.c:1784 [inline]
BUG: KASAN: slab-out-of-bounds in ocfs2_dir_foreach_blk+0x1704/0x1b20 fs/ocfs2/dir.c:1912
Read of size 2 at addr ffff88804ef6e780 by task kworker/u4:10/3000

CPU: 0 UID: 0 PID: 3000 Comm: kworker/u4:10 Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: ocfs2_wq ocfs2_complete_recovery
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 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
 ocfs2_check_dir_entry fs/ocfs2/dir.c:305 [inline]
 ocfs2_dir_foreach_blk_id fs/ocfs2/dir.c:1784 [inline]
 ocfs2_dir_foreach_blk+0x1704/0x1b20 fs/ocfs2/dir.c:1912
 ocfs2_dir_foreach+0xb4/0x100 fs/ocfs2/dir.c:1923
 ocfs2_queue_orphans fs/ocfs2/journal.c:2186 [inline]
 ocfs2_recover_orphans fs/ocfs2/journal.c:2270 [inline]
 ocfs2_complete_recovery+0xcf1/0x25c0 fs/ocfs2/journal.c:1351
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Allocated by task 5307:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:247 [inline]
 slab_post_alloc_hook mm/slub.c:4085 [inline]
 slab_alloc_node mm/slub.c:4134 [inline]
 kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4141
 fib_table_insert+0x604/0x1f30 net/ipv4/fib_trie.c:1363
 fib_magic+0x3d8/0x620 net/ipv4/fib_frontend.c:1104
 fib_add_ifaddr+0x40c/0x5e0 net/ipv4/fib_frontend.c:1148
 fib_netdev_event+0x375/0x490 net/ipv4/fib_frontend.c:1486
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
 __dev_notify_flags+0x207/0x400
 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8918
 do_setlink+0xcd0/0x41f0 net/core/rtnetlink.c:2929
 __rtnl_newlink net/core/rtnetlink.c:3725 [inline]
 rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3772
 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6675
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:744
 __sys_sendto+0x39b/0x4f0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2222
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88804ef6e738
 which belongs to the cache ip_fib_alias of size 56
The buggy address is located 16 bytes to the right of
 allocated 56-byte region [ffff88804ef6e738, ffff88804ef6e770)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4ef6e
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000000 ffff88801e123dc0 dead000000000122 0000000000000000
raw: 0000000000000000 00000000002e002e 00000001f5000000 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 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5307, tgid 5307 (syz-executor), ts 66526074518, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1545 [inline]
 get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4733
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
 alloc_slab_page+0x6a/0x120 mm/slub.c:2412
 allocate_slab+0x5a/0x2f0 mm/slub.c:2578
 new_slab mm/slub.c:2631 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818
 __slab_alloc+0x58/0xa0 mm/slub.c:3908
 __slab_alloc_node mm/slub.c:3961 [inline]
 slab_alloc_node mm/slub.c:4122 [inline]
 kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4141
 fib_table_insert+0x604/0x1f30 net/ipv4/fib_trie.c:1363
 fib_magic+0x3d8/0x620 net/ipv4/fib_frontend.c:1104
 fib_add_ifaddr+0x40c/0x5e0 net/ipv4/fib_frontend.c:1148
 fib_netdev_event+0x375/0x490 net/ipv4/fib_frontend.c:1486
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
 __dev_notify_flags+0x207/0x400
 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8918
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88804ef6e680: fc 00 00 00 00 00 00 00 fc fc fc fc 00 00 00 00
 ffff88804ef6e700: 00 00 00 fc fc fc fc 00 00 00 00 00 00 00 fc fc
>ffff88804ef6e780: fc fc 00 00 00 00 00 00 00 fc fc fc fc 00 00 00
                   ^
 ffff88804ef6e800: 00 00 00 00 fc fc fc fc 00 00 00 00 00 00 00 fc
 ffff88804ef6e880: fc fc fc 00 00 00 00 00 00 00 fc fc fc fc 00 00
==================================================================