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INFO: task hung in addrconf_dad_work

Status: closed as invalid on 2022/02/08 10:54
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+f4290c15a8ab6dee87c9@syzkaller.appspotmail.com
First crash: 2666d, last: 1303d
Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: INFO: task hung in rtnl_lock (log)
Repro: C syz .config
  
Fix bisection the fix commit could be any of (bisect log):
  2618500dd370 arm: dts: mediatek: Update mt7629 dts to reflect the latest dt-binding
  c9b96eb6da2a Merge branch 'Update-MT7629-to-support-PHYLINK-API'
  4e3eff5beafa net: ethernet: mediatek: Fix MT7629 missing GMII mode support
  cab209e571a9 tcp: fix a possible lockdep splat in tcp_done()
  8d045995ed5b Merge branch 'mpls-push-pop-fix'
  b790b5549bdf net: dsa: sja1105: Use the correct style for SPDX License Identifier
  39f13ea2f61b net: avoid potential infinite loop in tc_ctl_action()
  fa4e0f8855fc net/sched: fix corrupted L2 header with MPLS 'push' and 'pop' actions
  28aa7c86c2b4 sched: etf: Fix ordering of packets with same txtime
  dedc5a08da07 net: avoid errors when trying to pop MLPS header on non-MPLS packets
  63dfb7938b13 sctp: change sctp_prot .no_autobind with true
  a03681dd5d1b net: cavium: Use the correct style for SPDX License Identifier
  61c1d33daf7b net: i82596: fix dma_alloc_attr for sni_82596
  b31141d390f1 net: dsa: microchip: Use the correct style for SPDX License Identifier
  539825a53604 davinci_cpdma: make cpdma_chan_split_pool static
  ddc790e92b3a net: ethernet: broadcom: have drivers select DIMLIB as needed
  bad28d889cae net: stmmac: make tc_flow_parsers static
  f913eac8e555 net: Update address for vrf and l3mdev in MAINTAINERS
  92696286f3bb net: bcmgenet: Set phydev->dev_flags only for internal PHYs
  efb86fede98c net: bcmgenet: Fix RGMII_MODE_EN value for GENET v1/2/3
  77b6d09f4ae6 net: usb: sr9800: fix uninitialized local variable
  b0818f80c8c1 blackhole_netdev: fix syzkaller reported issue
  bd74708cd979 Revert "blackhole_netdev: fix syzkaller reported issue"
   
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
Reminder: 99 open syzbot bugs in net subsystem 14 (14) 2019/07/31 15:13
Reminder: 94 open syzbot bugs in net subsystem 1 (1) 2019/06/25 05:48
INFO: task hung in addrconf_dad_work 0 (1) 2019/02/16 10:20
▶ ▼ Similar bugs (14)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 INFO: task hung in addrconf_dad_work (2) 1 67 303d 510d 0/3 auto-obsoleted due to no activity on 2024/11/26 11:15
android-414 INFO: task hung in addrconf_dad_work 1 1 2230d 2230d 0/1 auto-closed as invalid on 2019/10/25 08:37
upstream INFO: task hung in addrconf_dad_work (5) net 1 C done 1493 2d01h 353d 0/29 upstream: reported C repro on 2024/07/29 15:23
android-49 INFO: task hung in addrconf_dad_work 1 1 2517d 2517d 0/3 auto-closed as invalid on 2019/02/22 20:09
upstream INFO: task hung in addrconf_dad_work (2) net 1 C unreliable error 107 603d 958d 0/29 closed as invalid on 2023/11/23 17:05
linux-6.1 INFO: task hung in addrconf_dad_work (4) origin:upstream 1 syz 2 26d 50d 0/3 upstream: reported syz repro on 2025/05/29 09:13
linux-6.1 INFO: task hung in addrconf_dad_work 1 2 792d 822d 0/3 auto-obsoleted due to no activity on 2023/08/26 05:16
linux-5.15 INFO: task hung in addrconf_dad_work origin:upstream 1 syz 129 43d 545d 0/3 upstream: reported syz repro on 2024/01/20 08:09
upstream INFO: task hung in addrconf_dad_work (3) net 1 C 185 493d 534d 25/29 fixed on 2024/03/25 23:45
linux-6.1 INFO: task hung in addrconf_dad_work (3) 1 2 162d 194d 0/3 auto-obsoleted due to no activity on 2025/05/16 13:56
linux-4.19 INFO: task hung in addrconf_dad_work 1 1 2152d 2152d 0/1 auto-closed as invalid on 2019/12/24 18:36
linux-4.19 INFO: task hung in addrconf_dad_work (2) 1 C error 72 871d 1943d 0/1 upstream: reported C repro on 2020/03/22 17:39
linux-4.14 INFO: task hung in addrconf_dad_work 1 C inconclusive 1 1118d 1724d 0/1 upstream: reported C repro on 2020/10/27 17:48
upstream INFO: task hung in addrconf_dad_work (4) net 1 2632 374d 424d 26/29 fixed on 2024/07/09 19:14

Sample crash report:
INFO: task kworker/0:4:8419 blocked for more than 143 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4     state:D stack:26632 pid: 8419 ppid:     2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:669 [inline]
 __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
 addrconf_dad_work+0xa3/0x1340 net/ipv6/addrconf.c:4047
 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/1:5:8465 blocked for more than 144 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:5     state:D stack:26360 pid: 8465 ppid:     2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:669 [inline]
 __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
 addrconf_dad_work+0xa3/0x1340 net/ipv6/addrconf.c:4047
 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task kworker/1:8:8536 blocked for more than 144 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:8     state:D stack:27424 pid: 8536 ppid:     2 flags:0x00004000
Workqueue: events linkwatch_event
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:669 [inline]
 __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
 linkwatch_event+0xb/0x60 net/core/link_watch.c:251
 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz-executor483:8554 blocked for more than 145 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor483 state:D stack:28152 pid: 8554 ppid:  6550 flags:0x00000004
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:669 [inline]
 __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
 ip6mr_sk_done+0xe9/0x370 net/ipv6/ip6mr.c:1582
 rawv6_close+0x58/0x80 net/ipv6/raw.c:1198
 inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:479
 __sock_release+0xcd/0x280 net/socket.c:649
 sock_close+0x18/0x20 net/socket.c:1314
 __fput+0x288/0x9f0 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7b7419784b
RSP: 002b:00007ffe59da3b00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f7b7419784b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000cfb29
R13: 00007f7b742604fc R14: 00007ffe59da3b60 R15: 00007f7b742604e0
INFO: task syz-executor483:8555 blocked for more than 145 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor483 state:D stack:28272 pid: 8555 ppid:  6550 flags:0x00000004
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:669 [inline]
 __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
 rtnl_lock net/core/rtnetlink.c:72 [inline]
 rtnetlink_rcv_msg+0x3be/0xb80 net/core/rtnetlink.c:5569
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:724
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7b741db969
RSP: 002b:00007f7b74185308 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7b742604e8 RCX: 00007f7b741db969
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000005
RBP: 00007f7b742604e0 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000000028 R11: 0000000000000246 R12: 00007f7b742604ec
R13: 00007f7b7422d484 R14: 7277732f7665642f R15: 0000000000022000
INFO: task syz-executor483:8556 blocked for more than 147 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor483 state:D stack:28152 pid: 8556 ppid:  6548 flags:0x00000004
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:669 [inline]
 __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
 ip6mr_sk_done+0xe9/0x370 net/ipv6/ip6mr.c:1582
 rawv6_close+0x58/0x80 net/ipv6/raw.c:1198
 inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:479
 __sock_release+0xcd/0x280 net/socket.c:649
 sock_close+0x18/0x20 net/socket.c:1314
 __fput+0x288/0x9f0 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7b7419784b
RSP: 002b:00007ffe59da3b00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f7b7419784b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000cfb0d
R13: 00007f7b7426050c R14: 00007ffe59da3b60 R15: 00007f7b742604e0
INFO: task syz-executor483:8557 blocked for more than 147 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor483 state:D stack:24560 pid: 8557 ppid:  6548 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:669 [inline]
 __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
 netdev_run_todo+0x6fa/0xa80 net/core/dev.c:10594
 rtnl_unlock net/core/rtnetlink.c:112 [inline]
 rtnetlink_rcv_msg+0x420/0xb80 net/core/rtnetlink.c:5573
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:724
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7b741db969
RSP: 002b:00007f7b74185308 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7b742604e8 RCX: 00007f7b741db969
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000005
RBP: 00007f7b742604e0 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000000028 R11: 0000000000000246 R12: 00007f7b742604ec
R13: 00007f7b7422d484 R14: 7277732f7665642f R15: 0000000000022000
INFO: task syz-executor483:8558 blocked for more than 149 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor483 state:D stack:28152 pid: 8558 ppid:  6546 flags:0x00000004
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:669 [inline]
 __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
 ip6mr_sk_done+0xe9/0x370 net/ipv6/ip6mr.c:1582
 rawv6_close+0x58/0x80 net/ipv6/raw.c:1198
 inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:479
 __sock_release+0xcd/0x280 net/socket.c:649
 sock_close+0x18/0x20 net/socket.c:1314
 __fput+0x288/0x9f0 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7b7419784b
RSP: 002b:00007ffe59da3b00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f7b7419784b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000cfb26
R13: 00007f7b742604fc R14: 00007ffe59da3b60 R15: 00007f7b742604e0
INFO: task syz-executor483:8559 blocked for more than 150 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor483 state:D stack:27704 pid: 8559 ppid:  6546 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:669 [inline]
 __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
 rtnl_lock net/core/rtnetlink.c:72 [inline]
 rtnetlink_rcv_msg+0x3be/0xb80 net/core/rtnetlink.c:5569
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:724
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7b741db969
RSP: 002b:00007f7b74185308 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7b742604e8 RCX: 00007f7b741db969
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000005
RBP: 00007f7b742604e0 R08: 000000000000000b R09: 0000000000000000
R10: 0000000000000028 R11: 0000000000000246 R12: 00007f7b742604ec
R13: 00007f7b7422d484 R14: 7277732f7665642f R15: 0000000000022000
INFO: task syz-executor483:8560 blocked for more than 151 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor483 state:D stack:28152 pid: 8560 ppid:  6551 flags:0x00000004
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:669 [inline]
 __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729
 ip6mr_sk_done+0xe9/0x370 net/ipv6/ip6mr.c:1582
 rawv6_close+0x58/0x80 net/ipv6/raw.c:1198
 inet_release+0x12e/0x280 net/ipv4/af_inet.c:431
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:479
 __sock_release+0xcd/0x280 net/socket.c:649
 sock_close+0x18/0x20 net/socket.c:1314
 __fput+0x288/0x9f0 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f7b7419784b
RSP: 002b:00007ffe59da3b00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f7b7419784b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000cfb28
R13: 00007f7b742604fc R14: 00007ffe59da3b60 R15: 00007f7b742604e0

Showing all locks held in the system:
1 lock held by khungtaskd/26:
 #0: ffffffff8b97fe20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
1 lock held by in:imklog/6230:
 #0: ffff88801c79dc70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
2 locks held by kworker/u4:0/6538:
 #0: ffff8880b9d31a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:474 [inline]
 #0: ffff8880b9d31a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1317 [inline]
 #0: ffff8880b9d31a58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1620 [inline]
 #0: ffff8880b9d31a58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x236/0x26f0 kernel/sched/core.c:6201
 #1: ffff8880b9d1f9c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39d/0x480 kernel/sched/psi.c:880
3 locks held by kworker/0:4/8419:
 #0: ffff8881486a7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff8881486a7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff8881486a7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
 #0: ffff8881486a7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline]
 #0: ffff8881486a7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline]
 #0: ffff8881486a7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268
 #1: ffffc9000c777db0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272
 #2: ffffffff8d0e3668 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa3/0x1340 net/ipv6/addrconf.c:4047
2 locks held by kworker/0:6/8445:
 #0: ffff888010c66538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010c66538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888010c66538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
 #0: ffff888010c66538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline]
 #0: ffff888010c66538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline]
 #0: ffff888010c66538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268
 #1: ffffc9000c867db0 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272
3 locks held by kworker/1:5/8465:
 #0: ffff8881486a7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff8881486a7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff8881486a7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
 #0: ffff8881486a7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline]
 #0: ffff8881486a7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline]
 #0: ffff8881486a7938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268
 #1: ffffc9000c8d7db0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272
 #2: ffffffff8d0e3668 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa3/0x1340 net/ipv6/addrconf.c:4047
3 locks held by kworker/1:8/8536:
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268
 #1: ffffc9000ca87db0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272
 #2: ffffffff8d0e3668 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:251
2 locks held by syz-executor483/8554:
 #0: ffff888069e3b810 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:786 [inline]
 #0: ffff888069e3b810 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:648
 #1: ffffffff8d0e3668 (rtnl_mutex){+.+.}-{3:3}, at: ip6mr_sk_done+0xe9/0x370 net/ipv6/ip6mr.c:1582
2 locks held by syz-executor483/8555:
 #0: ffffffff8d0e3668 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffffffff8d0e3668 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 net/core/rtnetlink.c:5569
 #1: ffffffff8b9891a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
 #1: ffffffff8b9891a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fc/0x620 kernel/rcu/tree_exp.h:837
2 locks held by syz-executor483/8556:
 #0: ffff888069e3ac10 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:786 [inline]
 #0: ffff888069e3ac10 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:648
 #1: ffffffff8d0e3668 (rtnl_mutex){+.+.}-{3:3}, at: ip6mr_sk_done+0xe9/0x370 net/ipv6/ip6mr.c:1582
1 lock held by syz-executor483/8557:
 #0: ffffffff8d0e3668 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0x6fa/0xa80 net/core/dev.c:10594
2 locks held by syz-executor483/8558:
 #0: ffff888076b81a10 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:786 [inline]
 #0: ffff888076b81a10 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:648
 #1: ffffffff8d0e3668 (rtnl_mutex){+.+.}-{3:3}, at: ip6mr_sk_done+0xe9/0x370 net/ipv6/ip6mr.c:1582
1 lock held by syz-executor483/8559:
 #0: ffffffff8d0e3668 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffffffff8d0e3668 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 net/core/rtnetlink.c:5569
2 locks held by syz-executor483/8560:
 #0: ffff888076b7d010 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:786 [inline]
 #0: ffff888076b7d010 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:648

Crashes (468):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/09/18 02:45 upstream ddf21bd8ab98 70b76c1d .config console log report syz C ci-upstream-kasan-gce INFO: task hung in addrconf_dad_work
2021/04/17 19:07 upstream 9cdbf6467424 7e2b734b .config console log report syz C ci-upstream-kasan-gce-selinux-root INFO: task hung in addrconf_dad_work
2021/04/01 05:45 linux-next 931294922e65 6a81331a .config console log report syz C ci-upstream-linux-next-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/01/14 14:13 upstream 65f0d2414b70 269d24e8 .config console log report syz C ci-upstream-kasan-gce
2020/11/21 23:58 upstream 27bba9c532a8 68068804 .config console log report syz C ci-upstream-kasan-gce
2019/02/16 10:13 upstream 5ded5871030e f42dee6d .config console log report syz C ci-upstream-kasan-gce-selinux-root
2020/11/22 12:27 upstream a349e4c65960 0d27f508 .config console log report syz C ci-upstream-kasan-gce-386
2020/12/15 12:14 net-old 7f376f1917d7 97183ed7 .config console log report syz C ci-upstream-net-this-kasan-gce
2020/10/02 14:04 net-old bb13a800620c 9602ddf4 .config console log report syz C ci-upstream-net-this-kasan-gce
2020/12/15 17:54 net-next-old 7bca5021a4e6 97183ed7 .config console log report syz C ci-upstream-net-kasan-gce
2020/12/06 02:37 net-next-old bcd684aace34 50503117 .config console log report syz C ci-upstream-net-kasan-gce
2020/10/07 14:45 net-next-old 9faebeb2d800 1880b4a9 .config console log report syz C ci-upstream-net-kasan-gce
2020/10/07 00:44 net-next-old 8b0308fe319b 1880b4a9 .config console log report syz C ci-upstream-net-kasan-gce
2020/10/11 07:18 net-old 7b50ee3dad25 4a77ae0b .config console log report syz ci-upstream-net-this-kasan-gce
2021/12/12 17:05 upstream a763d5a5abd6 49ca1f59 .config console log report info ci-upstream-kasan-gce INFO: task hung in addrconf_dad_work
2021/12/06 19:34 upstream 0fcfb00b28c0 579a8754 .config console log report info ci-upstream-kasan-gce INFO: task hung in addrconf_dad_work
2021/11/29 05:59 upstream d06c942efea4 63eeac02 .config console log report info ci-upstream-kasan-gce INFO: task hung in addrconf_dad_work
2021/11/24 16:19 upstream 5d9f4cf36721 545ab074 .config console log report info ci-upstream-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/11/20 20:15 upstream a90af8f15bdc 4eb20a4e .config console log report info ci-upstream-kasan-gce INFO: task hung in addrconf_dad_work
2021/11/17 08:01 upstream 8ab774587903 cafff8b6 .config console log report info ci-upstream-kasan-gce-selinux-root INFO: task hung in addrconf_dad_work
2021/11/12 12:29 upstream 5833291ab6de 75b04091 .config console log report info ci-upstream-kasan-gce-smack-root INFO: task hung in addrconf_dad_work
2021/11/07 00:57 upstream 512b7931ad05 4c1be0be .config console log report info ci-upstream-kasan-gce-selinux-root INFO: task hung in addrconf_dad_work
2021/10/20 06:11 upstream d9abdee5fd5a 466b7db1 .config console log report info ci-upstream-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/09/30 21:00 upstream 02d5e016800d 1d849ab4 .config console log report info ci-upstream-kasan-gce-selinux-root INFO: task hung in addrconf_dad_work
2021/09/30 19:40 upstream 02d5e016800d 1d849ab4 .config console log report info ci-upstream-kasan-gce-selinux-root INFO: task hung in addrconf_dad_work
2021/09/30 00:20 upstream 02d5e016800d be530f6c .config console log report info ci-upstream-kasan-gce INFO: task hung in addrconf_dad_work
2021/09/29 18:09 upstream 02d5e016800d be530f6c .config console log report info ci-upstream-kasan-gce-smack-root INFO: task hung in addrconf_dad_work
2021/09/29 15:53 upstream a4e6f95a891a be530f6c .config console log report info ci-upstream-kasan-gce-smack-root INFO: task hung in addrconf_dad_work
2021/09/29 15:24 upstream a4e6f95a891a be530f6c .config console log report info ci-upstream-kasan-gce-smack-root INFO: task hung in addrconf_dad_work
2021/09/29 14:12 upstream a4e6f95a891a be530f6c .config console log report info ci-upstream-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/09/29 05:19 upstream a4e6f95a891a d82cb927 .config console log report info ci-upstream-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/09/28 19:26 upstream d33bec7b3dfa d82cb927 .config console log report info ci-upstream-kasan-gce-selinux-root INFO: task hung in addrconf_dad_work
2021/09/28 17:08 upstream d33bec7b3dfa d82cb927 .config console log report info ci-upstream-kasan-gce INFO: task hung in addrconf_dad_work
2021/09/28 14:50 upstream 0513e464f900 d82cb927 .config console log report info ci-upstream-kasan-gce-smack-root INFO: task hung in addrconf_dad_work
2021/09/28 13:31 upstream 0513e464f900 d82cb927 .config console log report info ci-upstream-kasan-gce-smack-root INFO: task hung in addrconf_dad_work
2021/09/28 13:16 upstream 0513e464f900 d82cb927 .config console log report info ci-upstream-kasan-gce-smack-root INFO: task hung in addrconf_dad_work
2021/09/28 09:26 upstream 0513e464f900 78494d16 .config console log report info ci-upstream-kasan-gce-smack-root INFO: task hung in addrconf_dad_work
2021/09/30 23:37 upstream 02d5e016800d 1d849ab4 .config console log report info ci-upstream-kasan-gce-386 INFO: task hung in addrconf_dad_work
2021/09/28 16:07 upstream d33bec7b3dfa d82cb927 .config console log report info ci-upstream-kasan-gce-386 INFO: task hung in addrconf_dad_work
2021/09/28 11:50 upstream 0513e464f900 78494d16 .config console log report info ci-upstream-kasan-gce-386 INFO: task hung in addrconf_dad_work
2021/12/23 02:41 net-old 99d7fbb5cedf 6caa12e4 .config console log report info ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_dad_work
2021/12/04 07:58 net-old badd7857f5c9 a617004c .config console log report info ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/29 12:24 net-old 411a44c24a56 2353a3ec .config console log report info ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_dad_work
2021/09/22 11:59 bpf bc23f7244817 169724fe .config console log report info ci-upstream-bpf-kasan-gce INFO: task hung in addrconf_dad_work
2021/12/03 04:13 net-next-old fc993be36f9e 61f86278 .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/20 07:11 net-next-old cb3dc8901ba4 466b7db1 .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/20 02:55 net-next-old cb3dc8901ba4 466b7db1 .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/20 00:53 net-next-old cb3dc8901ba4 466b7db1 .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/19 22:25 net-next-old cb3dc8901ba4 466b7db1 .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/19 18:42 net-next-old cb3dc8901ba4 466b7db1 .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/19 13:47 net-next-old cb3dc8901ba4 24dc29db .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/19 12:47 net-next-old cb3dc8901ba4 24dc29db .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/19 00:49 net-next-old f616447034a1 24dc29db .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/19 00:29 net-next-old f616447034a1 24dc29db .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/18 23:25 net-next-old f616447034a1 24dc29db .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/18 16:36 net-next-old d40dfa0cebd8 0c5d9412 .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/18 15:00 net-next-old d40dfa0cebd8 0c5d9412 .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/18 14:00 net-next-old d40dfa0cebd8 0c5d9412 .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/18 13:03 net-next-old d40dfa0cebd8 0c5d9412 .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/08 23:19 net-next-old e761523d0b40 efe0f24d .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/09/30 14:18 bpf-next 161ecd537948 be530f6c .config console log report info ci-upstream-bpf-next-kasan-gce INFO: task hung in addrconf_dad_work
2021/09/30 03:30 net-next-old ef91abfb20c7 be530f6c .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/09/29 07:47 net-next-old b69c99463d41 d82cb927 .config console log report info ci-upstream-net-kasan-gce INFO: task hung in addrconf_dad_work
2021/09/29 03:25 bpf-next 72e1781a5de9 d82cb927 .config console log report info ci-upstream-bpf-next-kasan-gce INFO: task hung in addrconf_dad_work
2021/10/21 04:00 linux-next 51dba6e335ff f111d03b .config console log report info ci-upstream-linux-next-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/10/21 01:16 linux-next 51dba6e335ff f111d03b .config console log report info ci-upstream-linux-next-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/10/20 23:35 linux-next 51dba6e335ff f111d03b .config console log report info ci-upstream-linux-next-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/10/20 22:15 linux-next 51dba6e335ff f111d03b .config console log report info ci-upstream-linux-next-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/10/20 12:52 linux-next 51dba6e335ff 418a00eb .config console log report info ci-upstream-linux-next-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/10/20 11:37 linux-next 51dba6e335ff 418a00eb .config console log report info ci-upstream-linux-next-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/10/20 08:43 linux-next 51dba6e335ff 466b7db1 .config console log report info ci-upstream-linux-next-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/10/06 11:45 linux-next 29616f67fcbd 0a63fd36 .config console log report info ci-upstream-linux-next-kasan-gce-root INFO: task hung in addrconf_dad_work
2021/01/16 19:52 net-next-old 9ab7e76aefc9 65a7a854 .config console log report info ci-upstream-net-kasan-gce
2018/03/30 16:13 net-next-old 18845557fd6f d47f0ed6 .config console log report ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.