INFO: task syz.1.38:6679 blocked for more than 143 seconds. Not tainted syzkaller #0 Blocked by coredump. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.38 state:D stack:24744 pid:6679 tgid:6675 ppid:6377 task_flags:0x40054c flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1798/0x4c90 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0x165/0x360 kernel/sched/core.c:7058 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115 rwsem_down_write_slowpath+0x926/0x10e0 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1591 mmap_write_lock include/linux/mmap_lock.h:397 [inline] exit_mmap+0x28e/0xb40 mm/mmap.c:1288 __mmput+0x118/0x430 kernel/fork.c:1129 exit_mm+0x1da/0x2c0 kernel/exit.c:582 do_exit+0x648/0x22f0 kernel/exit.c:949 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102 get_signal+0x125e/0x1310 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x217/0x300 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f77d818eec9 RSP: 002b:00007f77d90310e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007f77d83e5fa8 RCX: 00007f77d818eec9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f77d83e5fac RBP: 00007f77d83e5fa0 R08: 7fffffffffffffff R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f77d83e6038 R14: 00007ffd4e6f9990 R15: 00007ffd4e6f9a78 INFO: task syz.1.38:6679 is blocked on an rw-semaphore, but the owner is not found. INFO: task syz.0.45:6690 blocked for more than 143 seconds. Not tainted syzkaller #0 Blocked by coredump. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.45 state:D stack:26840 pid:6690 tgid:6690 ppid:6376 task_flags:0x40004c flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1798/0x4c90 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0x165/0x360 kernel/sched/core.c:7058 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115 rwsem_down_write_slowpath+0x926/0x10e0 kernel/locking/rwsem.c:1185 __down_write_common kernel/locking/rwsem.c:1317 [inline] __down_write kernel/locking/rwsem.c:1326 [inline] down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1591 mmap_write_lock include/linux/mmap_lock.h:397 [inline] exit_mmap+0x28e/0xb40 mm/mmap.c:1288 __mmput+0x118/0x430 kernel/fork.c:1129 exit_mm+0x1da/0x2c0 kernel/exit.c:582 do_exit+0x648/0x22f0 kernel/exit.c:949 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102 __do_sys_exit_group kernel/exit.c:1113 [inline] __se_sys_exit_group kernel/exit.c:1111 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1111 x64_sys_call+0x21f7/0x2200 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x8a/0x300 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f0308f8eec9 RSP: 002b:00007ffcdec1fc28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0308f8eec9 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffcdec1fc8c R08: 00000005dec1fd1f R09: 00000000000927c0 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000011 R13: 00000000000927c0 R14: 000000000002097a R15: 00007ffcdec1fce0 INFO: task syz.0.45:6690 is blocked on an rw-semaphore, but the owner is not found. Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8dd3a160 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8dd3a160 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8dd3a160 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 3 locks held by kworker/u8:5/999: #0: ffff8880b8839f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:636 #1: ffff8880b8824008 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:220 [inline] #1: ffff8880b8824008 (psi_seq){-.-.}-{0:0}, at: __schedule+0x22c6/0x4c90 kernel/sched/core.c:6955 #2: ffffffff996af818 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x87/0x540 lib/debugobjects.c:818 3 locks held by kworker/u8:7/4454: 2 locks held by udevd/5185: #0: ffffffff8ddf16f0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1484 [inline] #0: ffffffff8ddf16f0 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1537 #1: ffff88807dabc260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #1: ffff88807dabc260 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x12e/0x1ab0 mm/mmap.c:1727 2 locks held by getty/5577: #0: ffff88814e2260a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900036bb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222 4 locks held by kworker/u8:8/6027: 1 lock held by syz-executor/6375: #0: ffff88806d630ca0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88806d630ca0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/6376: #0: ffff888027b98ca0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888027b98ca0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/6377: #0: ffff888027b99760 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888027b99760 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/6383: #0: ffff88806d631760 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88806d631760 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by sed/6674: #0: ffff8880279501e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #0: ffff8880279501e0 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x211/0x4d0 mm/util.c:578 1 lock held by syz.1.38/6679: #0: ffff88807e2237a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807e2237a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.0.45/6690: #0: ffff88807e222220 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807e222220 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.2.46/6692: #0: ffff8880279557e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880279557e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/6699: #0: ffff88807c32ed60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807c32ed60 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/6701: #0: ffff88807c32c260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807c32c260 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/6703: #0: ffff88807c32d7e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807c32d7e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.4.55/6806: #0: ffff88807e220ca0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807e220ca0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/7924: #0: ffff88806bdbc260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88806bdbc260 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.7.709/8176: #0: ffff888027952ce0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888027952ce0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.9.612/8178: #0: ffff88807e3d57e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807e3d57e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.0.617/8182: #0: ffff888027952220 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888027952220 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.8.710/8185: #0: ffff88807e3d6d60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807e3d6d60 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/8189: #0: ffff88807e3d62a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807e3d62a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/8196: #0: ffff8880277a2220 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880277a2220 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.1.722/8286: #0: ffff888019c72220 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888019c72220 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.3.723/8288: #0: ffff888019c74260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888019c74260 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.2.732/8311: #0: ffff88807c32b7a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807c32b7a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/9210: #0: ffff888068b34d20 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888068b34d20 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/9212: #0: ffff888068b337a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888068b337a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/9237: #0: ffff88804f5101e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88804f5101e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.5.1297/9511: #0: ffff888019c757e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888019c757e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.6.1296/9512: #0: ffff88804f5157e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88804f5157e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.4.1298/9515: #0: ffff88804f516d60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88804f516d60 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/9519: #0: ffff888019c71760 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888019c71760 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 2 locks held by syz-executor/9521: #0: ffffffff8ddf16f0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1484 [inline] #0: ffffffff8ddf16f0 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1537 #1: ffff888019c762a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:415 [inline] #1: ffff888019c762a0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x12e/0x1ab0 mm/mmap.c:1727 1 lock held by syz-executor/9524: #0: ffff88804f5162a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88804f5162a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz-executor/9526: #0: ffff88804f514260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88804f514260 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.1.1315/9632: #0: ffff888068b34260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff888068b34260 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.3.1831/10724: #0: ffff8880452b62a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff8880452b62a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.2.1850/10765: #0: ffff88807ea8ed60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88807ea8ed60 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 1 lock held by syz.6.1852/10768: #0: ffff88804f511760 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:397 [inline] #0: ffff88804f511760 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb40 mm/mmap.c:1288 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline] watchdog+0x15af/0x15f0 kernel/hung_task.c:491 kthread+0x711/0x890 kernel/kthread.c:463 ret_from_fork+0x435/0x7c0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:unwind_next_frame+0x38f/0x2390 arch/x86/kernel/unwind_orc.c:-1 Code: 4c 8d 6a 05 4c 89 e0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 6d 19 00 00 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 80 19 00 00 <41> 0f b6 44 24 01 83 e0 07 0f 84 75 15 00 00 83 f8 01 4c 8b 7c 24 RSP: 0018:ffffc900001474f8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff8f6cd2e0 RCX: ffffffff8f6cd2e4 RDX: ffffffff8fe65058 RSI: ffffffff8fe65058 RDI: ffffffff8b9e2020 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8171c285 R10: ffffc90000147618 R11: ffffffff81ab4810 R12: ffffffff8fe6505c R13: ffffffff8fe6505d R14: ffffc900001475c8 R15: ffffffff8f6cd2e0 FS: 0000000000000000(0000) GS:ffff888126410000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555611275c8 CR3: 000000007e15e000 CR4: 00000000003526f0 Call Trace: arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 save_stack+0xf7/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0xbc2/0xd30 mm/page_alloc.c:2895 rcu_do_batch kernel/rcu/tree.c:2605 [inline] rcu_core+0xc9f/0x1750 kernel/rcu/tree.c:2861 handle_softirqs+0x286/0x860 kernel/softirq.c:579 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160 kthread+0x711/0x890 kernel/kthread.c:463 ret_from_fork+0x435/0x7c0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245