INFO: task kworker/1:0:17 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/1:0 state:D stack:22696 pid: 17 ppid: 2 flags:0x00004000 Workqueue: events request_firmware_work_func Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x947/0x22b0 kernel/sched/core.c:6287 schedule+0xcf/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa08/0x12b0 kernel/locking/mutex.c:729 device_lock include/linux/device.h:760 [inline] rtl871x_load_fw_fail drivers/staging/rtl8712/hal_init.c:42 [inline] rtl871x_load_fw_cb+0x112/0x160 drivers/staging/rtl8712/hal_init.c:55 request_firmware_work_func+0x12c/0x230 drivers/base/firmware_loader/main.c:1081 process_one_work+0x9bf/0x1620 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3c2/0x4a0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Showing all locks held in the system: 3 locks held by kworker/1:0/17: #0: ffff888100064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888100064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888100064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888100064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline] #0: ffff888100064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline] #0: ffff888100064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x8a3/0x1620 kernel/workqueue.c:2268 #1: ffffc9000012fdb0 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x8d7/0x1620 kernel/workqueue.c:2272 #2: ffff88810ceb4220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff88810ceb4220 (&dev->mutex){....}-{3:3}, at: rtl871x_load_fw_fail drivers/staging/rtl8712/hal_init.c:42 [inline] #2: ffff88810ceb4220 (&dev->mutex){....}-{3:3}, at: rtl871x_load_fw_cb+0x112/0x160 drivers/staging/rtl8712/hal_init.c:55 1 lock held by khungtaskd/24: #0: ffffffff87681ea0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:6446 2 locks held by systemd-journal/1159: 1 lock held by in:imklog/2808: 5 locks held by kworker/0:3/5445: #0: ffff8881037cd938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881037cd938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8881037cd938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff8881037cd938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline] #0: ffff8881037cd938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline] #0: ffff8881037cd938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8a3/0x1620 kernel/workqueue.c:2268 #1: ffffc90002637db0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8d7/0x1620 kernel/workqueue.c:2272 #2: ffff88810cddc220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff88810cddc220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4330 drivers/usb/core/hub.c:5662 #3: ffff88811575c220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #3: ffff88811575c220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:944 #4: ffff88811d06f1a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #4: ffff88811d06f1a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:944 6 locks held by kworker/0:7/7454: 5 locks held by kworker/1:1/29979: 2 locks held by agetty/995: #0: ffff88814be96098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc9000244b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3} , at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 3 locks held by kworker/1:8/21417: 6 locks held by kworker/1:2/23076: 2 locks held by login/31264: #0: ffff88810a484098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffff88810a484130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:961 [inline] #1: ffff88810a484130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:984 [inline] #1: ffff88810a484130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write.constprop.0+0x29f/0x910 drivers/tty/tty_io.c:1110 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: khungtaskd Not tainted 5.15.0-rc1-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+0x49/0x148 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1d5/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc0f/0xf20 kernel/hung_task.c:295 kthread+0x3c2/0x4a0 kernel/kthread.c:319 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: 1159 Comm: systemd-journal Not tainted 5.15.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_wait_context kernel/locking/lockdep.c:4713 [inline] RIP: 0010:__lock_acquire+0x65b/0x54a0 kernel/locking/lockdep.c:4965 Code: 01 f8 48 89 44 24 60 eb 66 48 8d 04 5b 48 c1 e0 06 48 05 c0 8b 53 8a 48 8d b8 b8 00 00 00 48 89 fa 48 c1 ea 03 42 0f b6 14 3a <84> d2 74 06 0f 8e 5f 2b 00 00 0f b6 80 b8 00 00 00 84 c0 74 06 40 RSP: 0018:ffffc900009b7770 EFLAGS: 00000806 RAX: ffffffff8a54a140 RBX: 0000000000000172 RCX: ffffffff81280d0d RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8a54a1f8 RBP: 0000000000000004 R08: 0000000000000000 R09: ffffffff8a5387cf R10: fffffbfff14a70f9 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8881131c1b40 R14: ffff8881131c24d0 R15: dffffc0000000000 FS: 00007fa1c69798c0(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31a25000 CR3: 0000000113904000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x19d/0x4d0 kernel/locking/lockdep.c:5590 rcu_lock_acquire include/linux/rcupdate.h:267 [inline] rcu_read_lock include/linux/rcupdate.h:687 [inline] lock_page_memcg+0x68/0x7d0 mm/memcontrol.c:1984 page_remove_rmap+0x1f/0x5c0 mm/rmap.c:1348 zap_pte_range mm/memory.c:1362 [inline] zap_pmd_range mm/memory.c:1481 [inline] zap_pud_range mm/memory.c:1510 [inline] zap_p4d_range mm/memory.c:1531 [inline] unmap_page_range+0xc22/0x1c40 mm/memory.c:1552 unmap_single_vma+0x198/0x310 mm/memory.c:1597 unmap_vmas+0x16d/0x2f0 mm/memory.c:1629 unmap_region+0x204/0x350 mm/mmap.c:2650 __do_munmap+0x600/0x1260 mm/mmap.c:2884 __vm_munmap+0x104/0x220 mm/mmap.c:2907 __do_sys_munmap mm/mmap.c:2933 [inline] __se_sys_munmap mm/mmap.c:2929 [inline] __x64_sys_munmap+0x62/0x80 mm/mmap.c:2929 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: 0033:0x7fa1c5c3d6e7 Code: c7 c0 ff ff ff ff eb 8d 48 8b 15 ac 47 2b 00 f7 d8 64 89 02 e9 5b ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 81 47 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffe28c225b8 EFLAGS: 00000206 ORIG_RAX: 000000000000000b RAX: ffffffffffffffda RBX: 000055edb6560f50 RCX: 00007fa1c5c3d6e7 RDX: 0000000000000000 RSI: 0000000000800000 RDI: 00007fa1c16de000 RBP: 00007ffe28c22628 R08: 480c8f9b95943b59 R09: 0000000000000060 R10: 771b0f7eda72b52c R11: 0000000000000206 R12: 00007ffe28c22630 R13: 00007ffe28c22620 R14: 000055edb55b799e R15: 00007ffe28c22b00 ---------------- Code disassembly (best guess): 0: 01 f8 add %edi,%eax 2: 48 89 44 24 60 mov %rax,0x60(%rsp) 7: eb 66 jmp 0x6f 9: 48 8d 04 5b lea (%rbx,%rbx,2),%rax d: 48 c1 e0 06 shl $0x6,%rax 11: 48 05 c0 8b 53 8a add $0xffffffff8a538bc0,%rax 17: 48 8d b8 b8 00 00 00 lea 0xb8(%rax),%rdi 1e: 48 89 fa mov %rdi,%rdx 21: 48 c1 ea 03 shr $0x3,%rdx 25: 42 0f b6 14 3a movzbl (%rdx,%r15,1),%edx * 2a: 84 d2 test %dl,%dl <-- trapping instruction 2c: 74 06 je 0x34 2e: 0f 8e 5f 2b 00 00 jle 0x2b93 34: 0f b6 80 b8 00 00 00 movzbl 0xb8(%rax),%eax 3b: 84 c0 test %al,%al 3d: 74 06 je 0x45 3f: 40 rex