[v6.6] KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings (2)
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syzbot
2:57 AM (6 hours ago) 2:57 AM
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Hello,
syzbot found the following issue on:
HEAD commit: 9760bf04666d Linux 6.6.135
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16755b6c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=c5b35c4db8465904
dashboard link: https://syzkaller.appspot.com/bug?extid=2c1df93abe59202d4958
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a685913d05a7/disk-9760bf04.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a3c1d21d4bca/vmlinux-9760bf04.xz
kernel image: https://storage.googleapis.com/syzbot-assets/09178887ef0d/bzImage-9760bf04.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2c1df9...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in __ethtool_get_link_ksettings+0x6e/0x180 net/ethtool/ioctl.c:438
Read of size 8 at addr ffff88807376a210 by task kworker/1:0/8483
CPU: 1 PID: 8483 Comm: kworker/1:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: infiniband ib_cache_event_task
Call Trace:
<TASK>
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xa8/0x210 mm/kasan/report.c:468
kasan_report+0x117/0x150 mm/kasan/report.c:581
__ethtool_get_link_ksettings+0x6e/0x180 net/ethtool/ioctl.c:438
ib_get_eth_speed+0x17d/0x7e0 drivers/infiniband/core/verbs.c:1984
rxe_query_port+0x8d/0x2d0 drivers/infiniband/sw/rxe/rxe_verbs.c:62
__ib_query_port drivers/infiniband/core/device.c:2082 [inline]
ib_query_port+0x167/0x820 drivers/infiniband/core/device.c:2114
ib_cache_update+0x1ae/0xad0 drivers/infiniband/core/cache.c:1501
ib_cache_event_task+0xe0/0x1d0 drivers/infiniband/core/cache.c:1575
process_one_work kernel/workqueue.c:2653 [inline]
process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
</TASK>
Allocated by task 6670:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
____kasan_kmalloc mm/kasan/common.c:375 [inline]
__kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1007 [inline]
__kmalloc_node+0xb4/0x230 mm/slab_common.c:1014
kmalloc_node include/linux/slab.h:620 [inline]
kvmalloc_node+0x70/0x180 mm/util.c:617
kvmalloc include/linux/slab.h:738 [inline]
kvzalloc include/linux/slab.h:746 [inline]
alloc_netdev_mqs+0x87/0x1040 net/core/dev.c:10867
rtnl_create_link+0x30e/0xd00 net/core/rtnetlink.c:3384
rtnl_newlink_create net/core/rtnetlink.c:3510 [inline]
__rtnl_newlink net/core/rtnetlink.c:3740 [inline]
rtnl_newlink+0x1455/0x20a0 net/core/rtnetlink.c:3753
rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6475
netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1894
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
__sys_sendto+0x4a9/0x6b0 net/socket.c:2200
__do_sys_sendto net/socket.c:2212 [inline]
__se_sys_sendto net/socket.c:2208 [inline]
__x64_sys_sendto+0xde/0xf0 net/socket.c:2208
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Freed by task 145:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
__kmem_cache_free+0xba/0x1e0 mm/slub.c:3843
device_release+0x96/0x1c0 drivers/base/core.c:-1
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x221/0x460 lib/kobject.c:737
netdev_run_todo+0xcb7/0xdc0 net/core/dev.c:10639
default_device_exit_batch+0x9f3/0xa80 net/core/dev.c:11659
ops_exit_list net/core/net_namespace.c:178 [inline]
cleanup_net+0x795/0xbb0 net/core/net_namespace.c:652
process_one_work kernel/workqueue.c:2653 [inline]
process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
The buggy address belongs to the object at ffff88807376a000
which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 528 bytes inside of
freed 4096-byte region [ffff88807376a000, ffff88807376b000)
The buggy address belongs to the physical page:
page:ffffea0001cdda00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x73768
head:ffffea0001cdda00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888077edb001
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888017c4f500 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff888077edb001
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 6670, tgid 6670 (syz-executor), ts 300996307530, free_ts 296415525431
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
prep_new_page mm/page_alloc.c:1588 [inline]
get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
__alloc_pages+0x1f0/0x460 mm/page_alloc.c:4500
alloc_slab_page+0x5d/0x160 mm/slub.c:1881
allocate_slab mm/slub.c:2028 [inline]
new_slab+0x87/0x2d0 mm/slub.c:2081
___slab_alloc+0xc5d/0x12f0 mm/slub.c:3253
__slab_alloc mm/slub.c:3339 [inline]
__slab_alloc_node mm/slub.c:3392 [inline]
slab_alloc_node mm/slub.c:3485 [inline]
__kmem_cache_alloc_node+0x19e/0x250 mm/slub.c:3534
__do_kmalloc_node mm/slab_common.c:1006 [inline]
__kmalloc_node_track_caller+0xa2/0x230 mm/slab_common.c:1027
kmemdup+0x2b/0x70 mm/util.c:131
kmemdup include/linux/fortify-string.h:779 [inline]
__addrconf_sysctl_register+0xa6/0x3f0 net/ipv6/addrconf.c:7192
addrconf_sysctl_register+0x15c/0x1b0 net/ipv6/addrconf.c:7258
ipv6_add_dev+0xc42/0x11e0 net/ipv6/addrconf.c:451
addrconf_notify+0x67b/0x1010 net/ipv6/addrconf.c:3640
notifier_call_chain+0x197/0x380 kernel/notifier.c:93
call_netdevice_notifiers_extack net/core/dev.c:2077 [inline]
call_netdevice_notifiers net/core/dev.c:2091 [inline]
register_netdevice+0x16a5/0x1bb0 net/core/dev.c:10351
virt_wifi_newlink+0x393/0x7c0 drivers/net/wireless/virtual/virt_wifi.c:568
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1181 [inline]
free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
napi_frag_unref include/linux/skbuff.h:3539 [inline]
skb_release_data+0x49a/0x800 net/core/skbuff.c:985
skb_release_all net/core/skbuff.c:1057 [inline]
__kfree_skb net/core/skbuff.c:1071 [inline]
skb_attempt_defer_free+0x12f/0x530 net/core/skbuff.c:6846
tcp_eat_recv_skb net/ipv4/tcp.c:1519 [inline]
tcp_recvmsg_locked+0x119a/0x2320 net/ipv4/tcp.c:2562
tcp_recvmsg+0x232/0x860 net/ipv4/tcp.c:2608
inet_recvmsg+0x140/0x1f0 net/ipv4/af_inet.c:882
sock_recvmsg_nosec net/socket.c:1046 [inline]
sock_recvmsg net/socket.c:1068 [inline]
__sys_recvfrom+0x36a/0x530 net/socket.c:2252
__do_sys_recvfrom net/socket.c:2270 [inline]
__se_sys_recvfrom net/socket.c:2266 [inline]
__x64_sys_recvfrom+0xde/0xf0 net/socket.c:2266
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Memory state around the buggy address:
ffff88807376a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807376a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807376a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807376a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807376a300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
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If the report is already addressed, let syzbot know by replying with:
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If you want to overwrite report's subsystems, reply with:
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If the report is a duplicate of another one, reply with:
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If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 9760bf04666d Linux 6.6.135
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16755b6c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=c5b35c4db8465904
dashboard link: https://syzkaller.appspot.com/bug?extid=2c1df93abe59202d4958
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a685913d05a7/disk-9760bf04.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a3c1d21d4bca/vmlinux-9760bf04.xz
kernel image: https://storage.googleapis.com/syzbot-assets/09178887ef0d/bzImage-9760bf04.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2c1df9...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in __ethtool_get_link_ksettings+0x6e/0x180 net/ethtool/ioctl.c:438
Read of size 8 at addr ffff88807376a210 by task kworker/1:0/8483
CPU: 1 PID: 8483 Comm: kworker/1:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: infiniband ib_cache_event_task
Call Trace:
<TASK>
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xa8/0x210 mm/kasan/report.c:468
kasan_report+0x117/0x150 mm/kasan/report.c:581
__ethtool_get_link_ksettings+0x6e/0x180 net/ethtool/ioctl.c:438
ib_get_eth_speed+0x17d/0x7e0 drivers/infiniband/core/verbs.c:1984
rxe_query_port+0x8d/0x2d0 drivers/infiniband/sw/rxe/rxe_verbs.c:62
__ib_query_port drivers/infiniband/core/device.c:2082 [inline]
ib_query_port+0x167/0x820 drivers/infiniband/core/device.c:2114
ib_cache_update+0x1ae/0xad0 drivers/infiniband/core/cache.c:1501
ib_cache_event_task+0xe0/0x1d0 drivers/infiniband/core/cache.c:1575
process_one_work kernel/workqueue.c:2653 [inline]
process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
</TASK>
Allocated by task 6670:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
____kasan_kmalloc mm/kasan/common.c:375 [inline]
__kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1007 [inline]
__kmalloc_node+0xb4/0x230 mm/slab_common.c:1014
kmalloc_node include/linux/slab.h:620 [inline]
kvmalloc_node+0x70/0x180 mm/util.c:617
kvmalloc include/linux/slab.h:738 [inline]
kvzalloc include/linux/slab.h:746 [inline]
alloc_netdev_mqs+0x87/0x1040 net/core/dev.c:10867
rtnl_create_link+0x30e/0xd00 net/core/rtnetlink.c:3384
rtnl_newlink_create net/core/rtnetlink.c:3510 [inline]
__rtnl_newlink net/core/rtnetlink.c:3740 [inline]
rtnl_newlink+0x1455/0x20a0 net/core/rtnetlink.c:3753
rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6475
netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1894
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
__sys_sendto+0x4a9/0x6b0 net/socket.c:2200
__do_sys_sendto net/socket.c:2212 [inline]
__se_sys_sendto net/socket.c:2208 [inline]
__x64_sys_sendto+0xde/0xf0 net/socket.c:2208
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Freed by task 145:
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
__kmem_cache_free+0xba/0x1e0 mm/slub.c:3843
device_release+0x96/0x1c0 drivers/base/core.c:-1
kobject_cleanup lib/kobject.c:689 [inline]
kobject_release lib/kobject.c:720 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x221/0x460 lib/kobject.c:737
netdev_run_todo+0xcb7/0xdc0 net/core/dev.c:10639
default_device_exit_batch+0x9f3/0xa80 net/core/dev.c:11659
ops_exit_list net/core/net_namespace.c:178 [inline]
cleanup_net+0x795/0xbb0 net/core/net_namespace.c:652
process_one_work kernel/workqueue.c:2653 [inline]
process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
The buggy address belongs to the object at ffff88807376a000
which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 528 bytes inside of
freed 4096-byte region [ffff88807376a000, ffff88807376b000)
The buggy address belongs to the physical page:
page:ffffea0001cdda00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x73768
head:ffffea0001cdda00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888077edb001
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888017c4f500 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff888077edb001
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 6670, tgid 6670 (syz-executor), ts 300996307530, free_ts 296415525431
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
prep_new_page mm/page_alloc.c:1588 [inline]
get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
__alloc_pages+0x1f0/0x460 mm/page_alloc.c:4500
alloc_slab_page+0x5d/0x160 mm/slub.c:1881
allocate_slab mm/slub.c:2028 [inline]
new_slab+0x87/0x2d0 mm/slub.c:2081
___slab_alloc+0xc5d/0x12f0 mm/slub.c:3253
__slab_alloc mm/slub.c:3339 [inline]
__slab_alloc_node mm/slub.c:3392 [inline]
slab_alloc_node mm/slub.c:3485 [inline]
__kmem_cache_alloc_node+0x19e/0x250 mm/slub.c:3534
__do_kmalloc_node mm/slab_common.c:1006 [inline]
__kmalloc_node_track_caller+0xa2/0x230 mm/slab_common.c:1027
kmemdup+0x2b/0x70 mm/util.c:131
kmemdup include/linux/fortify-string.h:779 [inline]
__addrconf_sysctl_register+0xa6/0x3f0 net/ipv6/addrconf.c:7192
addrconf_sysctl_register+0x15c/0x1b0 net/ipv6/addrconf.c:7258
ipv6_add_dev+0xc42/0x11e0 net/ipv6/addrconf.c:451
addrconf_notify+0x67b/0x1010 net/ipv6/addrconf.c:3640
notifier_call_chain+0x197/0x380 kernel/notifier.c:93
call_netdevice_notifiers_extack net/core/dev.c:2077 [inline]
call_netdevice_notifiers net/core/dev.c:2091 [inline]
register_netdevice+0x16a5/0x1bb0 net/core/dev.c:10351
virt_wifi_newlink+0x393/0x7c0 drivers/net/wireless/virtual/virt_wifi.c:568
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1181 [inline]
free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
napi_frag_unref include/linux/skbuff.h:3539 [inline]
skb_release_data+0x49a/0x800 net/core/skbuff.c:985
skb_release_all net/core/skbuff.c:1057 [inline]
__kfree_skb net/core/skbuff.c:1071 [inline]
skb_attempt_defer_free+0x12f/0x530 net/core/skbuff.c:6846
tcp_eat_recv_skb net/ipv4/tcp.c:1519 [inline]
tcp_recvmsg_locked+0x119a/0x2320 net/ipv4/tcp.c:2562
tcp_recvmsg+0x232/0x860 net/ipv4/tcp.c:2608
inet_recvmsg+0x140/0x1f0 net/ipv4/af_inet.c:882
sock_recvmsg_nosec net/socket.c:1046 [inline]
sock_recvmsg net/socket.c:1068 [inline]
__sys_recvfrom+0x36a/0x530 net/socket.c:2252
__do_sys_recvfrom net/socket.c:2270 [inline]
__se_sys_recvfrom net/socket.c:2266 [inline]
__x64_sys_recvfrom+0xde/0xf0 net/socket.c:2266
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Memory state around the buggy address:
ffff88807376a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807376a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88807376a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807376a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807376a300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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