ci starts bisection 2025-09-29 04:38:50.793735241 +0000 UTC m=+195796.847963072 bisecting fixing commit since ad1b832bf1cf2df9304f8eb72943111625c7e5a7 building syzkaller on 40a34ec944732a2502ee67d92cc8c023355dfad4 ensuring issue is reproducible on original commit ad1b832bf1cf2df9304f8eb72943111625c7e5a7 testing commit ad1b832bf1cf2df9304f8eb72943111625c7e5a7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c62e100924436daa02dc6a8b50d55af97075c00ae9a310fbd3493281bf992591 all runs: crashed: INFO: task hung in pipe_write representative crash: INFO: task hung in pipe_write, types: [HANG] check whether we can drop unnecessary instrumentation disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed testing commit ad1b832bf1cf2df9304f8eb72943111625c7e5a7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c798908ec8a4bebe966e151e29b2a53a175f1cc4976f5563ade76a94c390ee73 all runs: crashed: INFO: task hung in pipe_write representative crash: INFO: task hung in pipe_write, types: [HANG] the bug reproduces without the instrumentation disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed kconfig minimization: base=4092 full=8256 leaves diff=2142 split chunks (needed=false): <2142> split chunk #0 of len 2142 into 5 parts testing without sub-chunk 1/5 disabling configs for [bug_or_warning kasan locking atomic_sleep memleak ubsan], they are not needed testing commit ad1b832bf1cf2df9304f8eb72943111625c7e5a7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 02d31a0c35008c72984707c3b8d6a516ae2c0a6b0a3fcefd051e147456433c04 all runs: crashed: INFO: task hung in pipe_write representative crash: INFO: task hung in pipe_write, types: [HANG] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed testing commit ad1b832bf1cf2df9304f8eb72943111625c7e5a7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 1dc65c67a95e6023cb57e0daece0ad431139f378f7711eb5d89a246a318b9938 all runs: crashed: INFO: task hung in pipe_write representative crash: INFO: task hung in pipe_write, types: [HANG] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit ad1b832bf1cf2df9304f8eb72943111625c7e5a7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 0e99bdd104e92ab1602d1ec513ebd596ab566e8c9a1b5bc5aee385b067d980fa all runs: crashed: INFO: task hung in pipe_write representative crash: INFO: task hung in pipe_write, types: [HANG] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing commit ad1b832bf1cf2df9304f8eb72943111625c7e5a7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: c2215f4ce6feebafd93cac6a88c552aaa9632d7c161654bad40d8dd57d3d4b8f all runs: crashed: INFO: task hung in pipe_write representative crash: INFO: task hung in pipe_write, types: [HANG] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed testing commit ad1b832bf1cf2df9304f8eb72943111625c7e5a7 gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: 3fe28780e4cace957ccf53b67234f43178df945162418118b09e4985e4e589b1 all runs: crashed: INFO: task hung in pipe_write representative crash: INFO: task hung in pipe_write, types: [HANG] the chunk can be dropped disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed testing current HEAD e5f0a698b34ed76002dc5cff3804a61c80233a7a testing commit e5f0a698b34ed76002dc5cff3804a61c80233a7a gcc compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 kernel signature: d4f22753decdd516f23cadef92fcbef3cf72b723d4c203f2a2ad3166119de9f3 all runs: crashed: INFO: task hung in anon_pipe_write representative crash: INFO: task hung in anon_pipe_write, types: [HANG] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 1h53m8.97787717s (build: 57m44.304508743s, test: 46m7.040690371s) crash still not fixed or there were kernel test errors commit msg: Linux 6.17 crash: INFO: task hung in anon_pipe_write INFO: task kworker/1:1:37 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:13944 pid:37 tgid:37 ppid:2 task_flags:0x4208060 flags:0x00004000 Workqueue: events p9_write_work Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x738/0xc00 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xac/0x140 kernel/sched/core.c:7058 schedule_preempt_disabled+0x32/0x60 kernel/sched/core.c:7115 __mutex_lock_common kernel/locking/mutex.c:676 [inline] __mutex_lock+0x4b5/0xcc0 kernel/locking/mutex.c:760 anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 __kernel_write_iter+0x140/0x250 fs/read_write.c:619 __kernel_write fs/read_write.c:639 [inline] kernel_write+0x14a/0x260 fs/read_write.c:660 p9_fd_write net/9p/trans_fd.c:434 [inline] p9_write_work+0x160/0x310 net/9p/trans_fd.c:485 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0x2e7/0x5e0 kernel/workqueue.c:3319 worker_thread+0x20a/0x2f0 kernel/workqueue.c:3400 kthread+0x203/0x230 kernel/kthread.c:463 ret_from_fork+0xcf/0x1a0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Showing all locks held in the system: 3 locks held by kworker/0:0/9: #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3319 #1: ffffc90000053e48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc90000053e48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3319 #2: ffff888101e89668 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 3 locks held by kworker/1:0/24: #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3319 #1: ffffc900000d3e48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc900000d3e48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3319 #2: ffff888102b02668 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 1 lock held by khungtaskd/31: #0: ffffffff8297c0f0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8297c0f0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8297c0f0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2e/0x100 kernel/locking/lockdep.c:6775 3 locks held by kworker/1:1/37: #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3319 #1: ffffc9000013fe48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc9000013fe48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3319 #2: ffff888102b30e68 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 7 locks held by kworker/u8:3/43: 3 locks held by kworker/0:2/365: #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3319 #1: ffffc90000eb7e48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc90000eb7e48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3319 #2: ffff888100ead668 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 2 locks held by getty/852: #0: ffff888100a918a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40 drivers/tty/tty_ldisc.c:243 #1: ffffc900001fb2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1c3/0x6e0 drivers/tty/n_tty.c:2222 3 locks held by kworker/1:2/913: #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3319 #1: ffffc90000e07e48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc90000e07e48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3319 #2: ffff88810fa94c68 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 2 locks held by syz.3.16/2840: #0: ffff888102b30e68 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 #1: ffff888111b482e8 (mapping.invalidate_lock#3){....}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:935 [inline] #1: ffff888111b482e8 (mapping.invalidate_lock#3){....}-{3:3}, at: page_cache_ra_unbounded+0x61/0x230 mm/readahead.c:228 2 locks held by syz.4.17/3294: #0: ffff88810fa94c68 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 #1: ffff888111b488c0 (mapping.invalidate_lock#3){....}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:935 [inline] #1: ffff888111b488c0 (mapping.invalidate_lock#3){....}-{3:3}, at: page_cache_ra_unbounded+0x61/0x230 mm/readahead.c:228 3 locks held by kworker/1:3/3295: #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3319 #1: ffffc90002a4fe48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc90002a4fe48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3319 #2: ffff8881102f8068 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 2 locks held by syz.5.18/3748: #0: ffff8881102f8068 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 #1: ffff888111b48e98 (mapping.invalidate_lock#3){....}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:935 [inline] #1: ffff888111b48e98 (mapping.invalidate_lock#3){....}-{3:3}, at: page_cache_ra_unbounded+0x61/0x230 mm/readahead.c:228 3 locks held by kworker/1:4/3750: #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3319 #1: ffffc9000351fe48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc9000351fe48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3319 #2: ffff888102bb7068 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 2 locks held by syz.6.19/4203: #0: ffff888101e89668 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 #1: ffff8881159c02e8 (mapping.invalidate_lock#3){....}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:935 [inline] #1: ffff8881159c02e8 (mapping.invalidate_lock#3){....}-{3:3}, at: page_cache_ra_unbounded+0x61/0x230 mm/readahead.c:228 3 locks held by kworker/0:3/4205: #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3319 #1: ffffc90003ec7e48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc90003ec7e48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3319 #2: ffff88810b35f268 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 2 locks held by syz.7.20/4658: #0: ffff888102bb7068 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 #1: ffff888111b49470 (mapping.invalidate_lock#3){....}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:935 [inline] #1: ffff888111b49470 (mapping.invalidate_lock#3){....}-{3:3}, at: page_cache_ra_unbounded+0x61/0x230 mm/readahead.c:228 2 locks held by syz.8.21/5113: #0: ffff888100ead668 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 #1: ffff8881159c08c0 (mapping.invalidate_lock#3){....}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:935 [inline] #1: ffff8881159c08c0 (mapping.invalidate_lock#3){....}-{3:3}, at: page_cache_ra_unbounded+0x61/0x230 mm/readahead.c:228 2 locks held by syz.9.22/5567: #0: ffff88810b35f268 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 #1: ffff8881159c0e98 (mapping.invalidate_lock#3){....}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:935 [inline] #1: ffff8881159c0e98 (mapping.invalidate_lock#3){....}-{3:3}, at: page_cache_ra_unbounded+0x61/0x230 mm/readahead.c:228 3 locks held by kworker/0:4/5569: #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3319 #1: ffffc900058efe48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc900058efe48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3319 #2: ffff888102b06068 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 2 locks held by syz.0.23/6022: #0: ffff888102b06068 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 #1: ffff8881159c1470 (mapping.invalidate_lock#3){....}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:935 [inline] #1: ffff8881159c1470 (mapping.invalidate_lock#3){....}-{3:3}, at: page_cache_ra_unbounded+0x61/0x230 mm/readahead.c:228 2 locks held by syz.1.24/6477: #0: ffff888102b02668 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 #1: ffff888111b49a48 (mapping.invalidate_lock#3){....}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:935 [inline] #1: ffff888111b49a48 (mapping.invalidate_lock#3){....}-{3:3}, at: page_cache_ra_unbounded+0x61/0x230 mm/readahead.c:228 3 locks held by kworker/1:6/6479: #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff888100078748 ((wq_completion)events){....}-{0:0}, at: process_scheduled_works+0x27f/0x5e0 kernel/workqueue.c:3319 #1: ffffc90006b9fe48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc90006b9fe48 ((work_completion)(&m->wq)){....}-{0:0}, at: process_scheduled_works+0x29f/0x5e0 kernel/workqueue.c:3319 #2: ffff888102b03468 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 2 locks held by syz.2.25/6932: #0: ffff888102b03468 (&pipe->mutex){....}-{3:3}, at: anon_pipe_write+0x4a/0x5b0 fs/pipe.c:458 #1: ffff888111b4a020 (mapping.invalidate_lock#3){....}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:935 [inline] #1: ffff888111b4a020 (mapping.invalidate_lock#3){....}-{3:3}, at: page_cache_ra_unbounded+0x61/0x230 mm/readahead.c:228 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0xa2/0xf0 lib/dump_stack.c:120 nmi_cpu_backtrace+0x109/0x170 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x8e/0x140 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+0x581/0x5b0 kernel/hung_task.c:491 kthread+0x203/0x230 kernel/kthread.c:463 ret_from_fork+0xcf/0x1a0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82 Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d d9 4c 09 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900000abee0 EFLAGS: 000002c2 RAX: 88ecfb3bb41dd700 RBX: 0000000000000001 RCX: 88ecfb3bb41dd700 RDX: ffffc900000abeb7 RSI: ffffffff8246e2c7 RDI: ffffffff8252f1cf RBP: ffffc900000abef8 R08: 0000000000080000 R09: 0000000000000052 R10: 0000000000000000 R11: ffffffff81283030 R12: 0000000000000000 R13: ffff888101295280 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8882b4b2f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ab92595b68 CR3: 0000000002848000 CR4: 00000000003506f0 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline] default_idle+0x13/0x20 arch/x86/kernel/process.c:757 default_idle_call+0x3d/0x70 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:190 [inline] do_idle+0xd7/0x240 kernel/sched/idle.c:330 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:428 start_secondary+0x95/0xa0 arch/x86/kernel/smpboot.c:315 common_startup_64+0x13e/0x147