INFO: task khugepaged:34 blocked for more than 143 seconds.
Not tainted 5.19.0-rc8-syzkaller-00025-g6e7765cb477a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:khugepaged state:D stack:28016 pid: 34 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x378/0x530 kernel/sched/completion.c:106
__flush_work+0x56c/0xb10 kernel/workqueue.c:3075
__lru_add_drain_all+0x421/0x770 mm/swap.c:841
khugepaged_do_scan mm/khugepaged.c:2235 [inline]
khugepaged+0x120/0x66b0 mm/khugepaged.c:2296
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
INFO: task syz-executor.1:16503 blocked for more than 144 seconds.
Not tainted 5.19.0-rc8-syzkaller-00025-g6e7765cb477a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27856 pid:16503 ppid: 3656 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747
exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
synchronize_rcu_expedited+0x2d3/0x610 kernel/rcu/tree_exp.h:927
synchronize_net+0x3a/0x50 net/core/dev.c:10745
packet_release+0xa6a/0xd00 net/packet/af_packet.c:3158
__sock_release+0xcd/0x280 net/socket.c:650
sock_close+0x18/0x20 net/socket.c:1365
__fput+0x277/0x9d0 fs/file_table.c:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xade/0x29d0 kernel/exit.c:795
do_group_exit+0xd2/0x2f0 kernel/exit.c:925
get_signal+0x2542/0x2600 kernel/signal.c:2857
arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f46b5489252
RSP: 002b:00007f46b664c0d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: 0000000020ffd000 RBX: 0000000000008011 RCX: 00007f46b5489252
RDX: 0000000000000003 RSI: 0000000000100000 RDI: 0000000020ffd000
RBP: 0000000020ffd000 R08: 0000000000000028 R09: 0000000010000000
R10: 0000000000008011 R11: 0000000000000206 R12: 0000000020000080
R13: 0000000020ffd000 R14: 0000000020000300 R15: 0000000020002000
INFO: task syz-executor.3:16526 blocked for more than 145 seconds.
Not tainted 5.19.0-rc8-syzkaller-00025-g6e7765cb477a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27080 pid:16526 ppid: 3659 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
synchronize_rcu_expedited+0x46f/0x610 kernel/rcu/tree_exp.h:942
synchronize_rcu+0x130/0x190 kernel/rcu/tree.c:3843
bcm_release+0x564/0xa10 net/can/bcm.c:1549
__sock_release+0xcd/0x280 net/socket.c:650
sock_close+0x18/0x20 net/socket.c:1365
__fput+0x277/0x9d0 fs/file_table.c:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xade/0x29d0 kernel/exit.c:795
do_group_exit+0xd2/0x2f0 kernel/exit.c:925
get_signal+0x2542/0x2600 kernel/signal.c:2857
arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f2bb5889209
RSP: 002b:00007f2bb6a93168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 0000000000000044 RBX: 00007f2bb599bf60 RCX: 00007f2bb5889209
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007f2bb58e3161 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2bb5ecfb1f R14: 00007f2bb6a93300 R15: 0000000000022000
INFO: task syz-executor.0:16535 blocked for more than 146 seconds.
Not tainted 5.19.0-rc8-syzkaller-00025-g6e7765cb477a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:25528 pid:16535 ppid: 3641 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
exp_funnel_lock kernel/rcu/tree_exp.h:313 [inline]
synchronize_rcu_expedited+0x5a6/0x610 kernel/rcu/tree_exp.h:927
synchronize_net+0x3a/0x50 net/core/dev.c:10745
packet_release+0xa6a/0xd00 net/packet/af_packet.c:3158
__sock_release+0xcd/0x280 net/socket.c:650
sock_close+0x18/0x20 net/socket.c:1365
__fput+0x277/0x9d0 fs/file_table.c:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xade/0x29d0 kernel/exit.c:795
do_group_exit+0xd2/0x2f0 kernel/exit.c:925
get_signal+0x2542/0x2600 kernel/signal.c:2857
arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6ac1089209
RSP: 002b:00007f6ac21ea168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 0000000000000064 RBX: 00007f6ac119bf60 RCX: 00007f6ac1089209
RDX: 0000000000004000 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007f6ac10e3161 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6ac16cfb1f R14: 00007f6ac21ea300 R15: 0000000000022000
INFO: task syz-executor.2:16531 blocked for more than 148 seconds.
Not tainted 5.19.0-rc8-syzkaller-00025-g6e7765cb477a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28032 pid:16531 ppid: 3655 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
exp_funnel_lock kernel/rcu/tree_exp.h:313 [inline]
synchronize_rcu_expedited+0x5a6/0x610 kernel/rcu/tree_exp.h:927
synchronize_rcu+0x130/0x190 kernel/rcu/tree.c:3843
synchronize_net+0x4a/0x50 net/core/dev.c:10747
packet_release+0xa6a/0xd00 net/packet/af_packet.c:3158
__sock_release+0xcd/0x280 net/socket.c:650
sock_close+0x18/0x20 net/socket.c:1365
__fput+0x277/0x9d0 fs/file_table.c:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc467c3be4b
RSP: 002b:00007fc4682cfb80 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fc467c3be4b
RDX: 0000000000000000 RSI: 0000001b2ef22458 RDI: 0000000000000003
RBP: 00007fc467d9d960 R08: 0000000000000000 R09: 00000000715d6f27
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000001cc494
R13: 00007fc4682cfc80 R14: 00007fc4682cfca0 R15: 0000000000000032
INFO: task dhcpcd:16545 blocked for more than 149 seconds.
Not tainted 5.19.0-rc8-syzkaller-00025-g6e7765cb477a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd state:D stack:29048 pid:16545 ppid: 3188 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
exp_funnel_lock kernel/rcu/tree_exp.h:313 [inline]
synchronize_rcu_expedited+0x5a6/0x610 kernel/rcu/tree_exp.h:927
synchronize_rcu+0x130/0x190 kernel/rcu/tree.c:3843
synchronize_net+0x4a/0x50 net/core/dev.c:10747
__unregister_prot_hook+0x48a/0x5a0 net/packet/af_packet.c:382
packet_do_bind+0x8bc/0xdc0 net/packet/af_packet.c:3227
packet_bind+0x152/0x1b0 net/packet/af_packet.c:3311
__sys_bind+0x1e9/0x250 net/socket.c:1776
__do_sys_bind net/socket.c:1787 [inline]
__se_sys_bind net/socket.c:1785 [inline]
__x64_sys_bind+0x6f/0xb0 net/socket.c:1785
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+0x63/0xcd
RIP: 0033:0x7f4d6b82ece7
RSP: 002b:00007ffc5813bee8 EFLAGS: 00000217 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 000055c78a117b60 RCX: 00007f4d6b82ece7
RDX: 0000000000000014 RSI: 00007ffc5813bef8 RDI: 0000000000000005
RBP: 0000000000000000 R08: 000055c78af386d0 R09: 00007f4d6b8efa60
R10: 0000000000000800 R11: 0000000000000217 R12: 000055c78af37d20
R13: 000055c78af399a8 R14: 00007ffc5815c7cc R15: 00007ffc5815c7f4
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8bd871e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
1 lock held by khugepaged/34:
#0: ffffffff8be797a8 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x62/0x770 mm/swap.c:790
3 locks held by kworker/u4:4/56:
2 locks held by getty/3288:
#0: ffff88814a7fe098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124
2 locks held by kworker/u4:12/6686:
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90005077da8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
3 locks held by kworker/0:9/11832:
2 locks held by syz-executor.1/16503:
#0: ffff888075fc5c10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:741 [inline]
#0: ffff888075fc5c10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:649
#1: ffffffff8bd91860 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#1: ffffffff8bd91860 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d3/0x610 kernel/rcu/tree_exp.h:927
3 locks held by syz-executor.3/16526:
#0: ffff8880270e9410 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:741 [inline]
#0: ffff8880270e9410 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:649
#1: ffff88803dbb5130 (sk_lock-AF_CAN){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#1: ffff88803dbb5130 (sk_lock-AF_CAN){+.+.}-{0:0}, at: bcm_release+0x1ff/0xa10 net/can/bcm.c:1517
#2: ffffffff8bd91860 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#2: ffffffff8bd91860 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d3/0x610 kernel/rcu/tree_exp.h:927
1 lock held by syz-executor.0/16535:
#0: ffff888027043210 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:741 [inline]
#0: ffff888027043210 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:649
1 lock held by syz-executor.2/16531:
#0: ffff888027045610 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:741 [inline]
#0: ffff888027045610 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:649
1 lock held by dhcpcd/16545:
#0: ffff888075824130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff888075824130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/16546:
#0: ffff88803f18e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88803f18e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/16547:
#0: ffff88814dac8130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88814dac8130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/16548:
#0: ffff88809c488130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88809c488130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/16549:
#0: ffff888017970130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff888017970130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/16550:
#0: ffff88809c48a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88809c48a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.19.0-rc8-syzkaller-00025-g6e7765cb477a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
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:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11832 Comm: kworker/0:9 Not tainted 5.19.0-rc8-syzkaller-00025-g6e7765cb477a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Workqueue: events ipvlan_process_multicast
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x60 kernel/kcov.c:200
Code: 81 e1 00 01 00 00 65 48 8b 14 25 80 6f 02 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 a4 15 00 00 85 c0 74 2b 8b 82 80 15 00 00 <83> f8 02 75 20 48 8b 8a 88 15 00 00 8b 92 84 15 00 00 48 8b 01 48
RSP: 0018:ffffc900066a7878 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 00000000000000de RCX: 0000000000000000
RDX: ffff888022b60000 RSI: ffffffff83fb9333 RDI: 0000000000000006
RBP: ffff88803bb28c98 R08: 0000000000000006 R09: 00000000000000de
R10: 00000000000000de R11: 0000000000000001 R12: 00000000000000de
R13: 0000000000000000 R14: 0000000000000000 R15: ffffc900066a7938
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6b13e9c380 CR3: 000000000ba8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
_find_next_bit+0x1e3/0x260 lib/find_bit.c:69
find_next_bit include/linux/find.h:44 [inline]
pcpu_is_populated mm/percpu.c:1081 [inline]
pcpu_find_block_fit+0x3ea/0x4e0 mm/percpu.c:1123
pcpu_alloc+0x59a/0x13d0 mm/percpu.c:1805
netdev_core_stats_alloc+0x20/0xa0 net/core/dev.c:10403
dev_core_stats include/linux/netdevice.h:3897 [inline]
dev_core_stats_rx_dropped_inc include/linux/netdevice.h:3909 [inline]
enqueue_to_backlog+0x3b5/0xbf0 net/core/dev.c:4696
netif_rx_internal+0x10a/0x5f0 net/core/dev.c:4953
dev_forward_skb+0x48/0x60 net/core/dev.c:2173
ipvlan_process_multicast+0x74b/0xd90 drivers/net/ipvlan/ipvlan_core.c:274
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306