INFO: task kworker/u4:5:1073 blocked for more than 143 seconds.
Not tainted 5.15.0-next-20211106-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:5 state:D stack:23736 pid: 1073 ppid: 2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
rcu_barrier+0x2db/0x440 kernel/rcu/tree.c:4050
l2tp_exit_net+0x247/0x500 net/l2tp/l2tp_core.c:1669
ops_exit_list+0xb0/0x160 net/core/net_namespace.c:168
cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:593
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz-executor.5:31901 can't die for more than 143 seconds.
task:syz-executor.5 state:R running task stack:28272 pid:31901 ppid: 27247 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
exit_to_user_mode_loop kernel/entry/common.c:163 [inline]
exit_to_user_mode_prepare+0x14a/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3c0a38aae9
RSP: 002b:00007f3c07900188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffea RBX: 00007f3c0a49df60 RCX: 00007f3c0a38aae9
RDX: 0000000000000020 RSI: 0000000020000000 RDI: 0000000000000012
RBP: 00007f3c0a3e4f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeb895fa1f R14: 00007f3c07900300 R15: 00005555570c6820
Showing all locks held in the system:
4 locks held by kworker/u4:1/10:
#0: ffff88804e59c938 ((wq_completion)phy20){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88804e59c938 ((wq_completion)phy20){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88804e59c938 ((wq_completion)phy20){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88804e59c938 ((wq_completion)phy20){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88804e59c938 ((wq_completion)phy20){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88804e59c938 ((wq_completion)phy20){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc90000cf7db0 ((work_completion)(&sdata->work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffff88809d96cd40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1013 [inline]
#2: ffff88809d96cd40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_rx_queued_mgmt+0x101/0x3130 net/mac80211/ibss.c:1628
#3: ffff888074ba98b0 (&local->sta_mtx){+.+.}-{3:3}, at: sta_info_destroy_addr+0x48/0xe0 net/mac80211/sta_info.c:1130
1 lock held by khungtaskd/27:
#0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by khugepaged/33:
#0: ffffffff8bc68888 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x65/0x760 mm/swap.c:797
4 locks held by kworker/u4:2/52:
#0: ffff88804c25f938 ((wq_completion)phy21){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88804c25f938 ((wq_completion)phy21){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88804c25f938 ((wq_completion)phy21){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88804c25f938 ((wq_completion)phy21){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88804c25f938 ((wq_completion)phy21){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88804c25f938 ((wq_completion)phy21){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc90001a0fdb0 ((work_completion)(&sdata->work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffff8880713dcd40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1013 [inline]
#2: ffff8880713dcd40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x90/0xe80 net/mac80211/ibss.c:1681
#3: ffff8880481098b0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_sta_expire net/mac80211/ibss.c:1255 [inline]
#3: ffff8880481098b0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_sta_merge_ibss net/mac80211/ibss.c:1298 [inline]
#3: ffff8880481098b0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x47e/0xe80 net/mac80211/ibss.c:1709
4 locks held by kworker/u4:3/54:
#0: ffff88802becc938 ((wq_completion)phy27){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88802becc938 ((wq_completion)phy27){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88802becc938 ((wq_completion)phy27){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88802becc938 ((wq_completion)phy27){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88802becc938 ((wq_completion)phy27){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88802becc938 ((wq_completion)phy27){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc90001a2fdb0 ((work_completion)(&sdata->work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffff88807eebcd40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1013 [inline]
#2: ffff88807eebcd40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x90/0xe80 net/mac80211/ibss.c:1681
#3: ffff888068b018b0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_sta_expire net/mac80211/ibss.c:1255 [inline]
#3: ffff888068b018b0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_sta_merge_ibss net/mac80211/ibss.c:1298 [inline]
#3: ffff888068b018b0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x47e/0xe80 net/mac80211/ibss.c:1709
4 locks held by kworker/u4:4/961:
#0: ffff88807b8f5938 ((wq_completion)phy25){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88807b8f5938 ((wq_completion)phy25){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88807b8f5938 ((wq_completion)phy25){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88807b8f5938 ((wq_completion)phy25){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88807b8f5938 ((wq_completion)phy25){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88807b8f5938 ((wq_completion)phy25){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc900043efdb0 ((work_completion)(&sdata->work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffff88807bd7cd40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1013 [inline]
#2: ffff88807bd7cd40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x90/0xe80 net/mac80211/ibss.c:1681
#3: ffff8880351298b0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_sta_expire net/mac80211/ibss.c:1255 [inline]
#3: ffff8880351298b0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_sta_merge_ibss net/mac80211/ibss.c:1298 [inline]
#3: ffff8880351298b0 (&local->sta_mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x47e/0xe80 net/mac80211/ibss.c:1709
4 locks held by kworker/u4:5/1073:
#0: ffff88814075b138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88814075b138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88814075b138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88814075b138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88814075b138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88814075b138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc900045dfdb0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffffffff8d2f7d50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb00 net/core/net_namespace.c:555
#3: ffffffff8bb8ccf0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x44/0x440 kernel/rcu/tree.c:3985
1 lock held by in:imklog/6236:
2 locks held by syz-executor.1/9398:
#0: ffff8880399c2610 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:783 [inline]
#0: ffff8880399c2610 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:648
#1: ffffffff8bb8cde8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#1: ffffffff8bb8cde8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fa/0x620 kernel/rcu/tree_exp.h:836
2 locks held by syz-executor.1/9409:
#0: ffff88801a353118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x97/0x9e0 block/bdev.c:914
#1: ffff88801a306b60 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x7a/0x1070 drivers/block/loop.c:1106
2 locks held by syz-executor.1/12964:
1 lock held by syz-executor.4/10290:
#0: ffffffff8bb8cde8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#0: ffffffff8bb8cde8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d5/0x620 kernel/rcu/tree_exp.h:836
2 locks held by syz-executor.1/14273:
4 locks held by kworker/u4:6/3525:
#0: ffff88802bec8938 ((wq_completion)phy26){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88802bec8938 ((wq_completion)phy26){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88802bec8938 ((wq_completion)phy26){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff88802bec8938 ((wq_completion)phy26){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88802bec8938 ((wq_completion)phy26){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88802bec8938 ((wq_completion)phy26){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc9001ca4fdb0 ((work_completion)(&sdata->work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffff888082de0d40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1013 [inline]
#2: ffff888082de0d40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_rx_queued_mgmt+0x101/0x3130 net/mac80211/ibss.c:1628
#3: ffff8880483598b0 (&local->sta_mtx){+.+.}-{3:3}, at: sta_info_destroy_addr+0x48/0xe0 net/mac80211/sta_info.c:1130
3 locks held by kworker/1:11/13339:
#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:635 [inline]
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269
#1: ffffc900143e7db0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273
#2: ffffffff8d30b4a8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:251
2 locks held by kworker/0:1/14320:
2 locks held by kworker/u4:9/31913:
1 lock held by syz-executor.0/31917:
#0: ffffffff8d30b4a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
#0: ffffffff8d30b4a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 net/core/rtnetlink.c:5568
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-next-20211106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:339
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 14897 Comm: syz-executor.2 Not tainted 5.15.0-next-20211106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__sanitizer_cov_trace_pc+0x5c/0x60 kernel/kcov.c:210
Code: 82 88 15 00 00 83 f8 02 75 20 48 8b 8a 90 15 00 00 8b 92 8c 15 00 00 48 8b 01 48 83 c0 01 48 39 c2 76 07 48 89 34 c1 48 89 01 0f 1f 00 41 55 41 54 49 89 fc 55 48 bd eb 83 b5 80 46 86 c8 61
RSP: 0018:ffffc90014a77730 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffea00009d8280 RCX: 0000000000000000
RDX: ffff88804e55ba80 RSI: ffffffff81b8f421 RDI: 0000000000000003
RBP: ffffea00009d8288 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81b8f413 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007fa0dc3d8000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44902d66b0 CR3: 000000001c791000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
PageHuge+0x121/0x170 mm/hugetlb.c:1836
page_remove_file_rmap mm/rmap.c:1257 [inline]
page_remove_rmap+0x670/0x1480 mm/rmap.c:1351
zap_pte_range mm/memory.c:1361 [inline]
zap_pmd_range mm/memory.c:1471 [inline]
zap_pud_range mm/memory.c:1500 [inline]
zap_p4d_range mm/memory.c:1521 [inline]
unmap_page_range+0xf0e/0x29f0 mm/memory.c:1542
unmap_single_vma+0x198/0x310 mm/memory.c:1587
unmap_vmas+0x16b/0x2f0 mm/memory.c:1619
exit_mmap+0x1d0/0x630 mm/mmap.c:3171
__mmput+0x122/0x4b0 kernel/fork.c:1164
mmput+0x56/0x60 kernel/fork.c:1185
exit_mm kernel/exit.c:507 [inline]
do_exit+0xb27/0x2b40 kernel/exit.c:819
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2830
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fa0dccdcae9
Code: Unable to access opcode bytes at RIP 0x7fa0dccdcabf.
RSP: 002b:00007fa0da252218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fa0dcdeff68 RCX: 00007fa0dccdcae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa0dcdeff68
RBP: 00007fa0dcdeff60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa0dcdeff6c
R13: 00007ffe60f43c1f R14: 00007fa0da252300 R15: 0000000000022000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 88 15 00 00 83 f8 mov %dl,-0x77d0000(%rip) # 0xf8830006
6: 02 75 20 add 0x20(%rbp),%dh
9: 48 8b 8a 90 15 00 00 mov 0x1590(%rdx),%rcx
10: 8b 92 8c 15 00 00 mov 0x158c(%rdx),%edx
16: 48 8b 01 mov (%rcx),%rax
19: 48 83 c0 01 add $0x1,%rax
1d: 48 39 c2 cmp %rax,%rdx
20: 76 07 jbe 0x29
22: 48 89 34 c1 mov %rsi,(%rcx,%rax,8)
26: 48 89 01 mov %rax,(%rcx)
* 29: c3 retq <-- trapping instruction
2a: 0f 1f 00 nopl (%rax)
2d: 41 55 push %r13
2f: 41 54 push %r12
31: 49 89 fc mov %rdi,%r12
34: 55 push %rbp
35: 48 bd eb 83 b5 80 46 movabs $0x61c8864680b583eb,%rbp
3c: 86 c8 61