INFO: task kworker/0:5:11591 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:5 state:D stack:0 pid:11591 tgid:11591 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a642e8>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a63354>] (__schedule) from [<81a642e8>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:ec6edd84 r9:00000002 r8:60000013 r7:829171a0 r6:ec6edd8c r5:83210c00 r4:83210c00 [<81a642bc>] (schedule) from [<81a646d0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:83210c00 r4:8291719c [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a66f30>] (__mutex_lock.constprop.0) from [<81a67a28>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:ec6ede08 r4:00000000 [<81a67a14>] (__mutex_lock_slowpath) from [<81a67a68>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a67a2c>] (mutex_lock) from [<804e9f6c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:857a5740 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:83210c00 r7:00000000 r6:83018400 r5:00001000 r4:7f26c000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:df9ad000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84e2b78c r4:84ee7d80 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:84e2b78c r4:84ee7d80 [<802783ec>] (process_one_work) from [<802791e8>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783ec>] (process_one_work) from [<802791e8>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:83210c00 r8:84ee7dac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:84ee7d80 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:84ee7d80 r8:80278fec r7:edd35e60 r6:85729500 r5:83210c00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xec6edfb0 to 0xec6edff8) dfa0: 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:857cd500 INFO: task kworker/0:5:11591 is blocked on a mutex likely owned by task kworker/1:73:13548. task:kworker/1:73 state:R running task stack:0 pid:13548 tgid:13548 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a6471c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86c53c00 r8:80200c04 r7:ea63dd54 r6:ffffffff r5:86c53c00 r4:00000000 [<81a646dc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xea63dd20 to 0xea63dd68) dd20: 93cc6000 ebb2f000 00000001 80239bf8 7f250000 00000001 82acb1c4 82aca5a0 dd40: 7f250000 ebb2f000 8280c9b4 ea63dd9c ea63dda0 ea63dd70 80230af0 80239c10 dd60: 80000013 ffffffff r5:80000013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e9d30>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9aac>] (__purge_vmap_area_lazy) from [<804ea0e8>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:ea63ddc0 r5:ea63de08 r4:ea63ddc0 [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85b8ae40 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86c53c00 r7:00000000 r6:83018600 r5:00001000 r4:7f268000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e017b000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85a0638c r4:85877500 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:85a0638c r4:85877500 [<802783ec>] (process_one_work) from [<802791e8>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783ec>] (process_one_work) from [<802791e8>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:86c53c00 r8:8587752c r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85877500 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85877500 r8:80278fec r7:ea7e1e60 r6:85877a00 r5:86c53c00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea63dfb0 to 0xea63dff8) dfa0: 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:84e5cfc0 INFO: task kworker/0:7:11655 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:7 state:D stack:0 pid:11655 tgid:11655 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a642e8>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a63354>] (__schedule) from [<81a642e8>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:df9d5d84 r9:00000002 r8:60010113 r7:829171a0 r6:df9d5d8c r5:85c6ec00 r4:85c6ec00 [<81a642bc>] (schedule) from [<81a646d0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:85c6ec00 r4:8291719c [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a66f30>] (__mutex_lock.constprop.0) from [<81a67a28>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:df9d5e08 r4:00000000 [<81a67a14>] (__mutex_lock_slowpath) from [<81a67a68>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a67a2c>] (mutex_lock) from [<804e9f6c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:858ea8c0 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:85c6ec00 r7:00000000 r6:83018400 r5:00001000 r4:7f26a000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:df9a7000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84e2b38c r4:85886600 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:84e2b38c r4:85886600 [<802783ec>] (process_one_work) from [<802791e8>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783ec>] (process_one_work) from [<802791e8>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:85c6ec00 r8:8588662c r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85886600 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85886600 r8:80278fec r7:ec7f9e60 r6:85886c80 r5:85c6ec00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdf9d5fb0 to 0xdf9d5ff8) 5fa0: 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:8589fa80 INFO: task kworker/0:7:11655 is blocked on a mutex likely owned by task kworker/1:73:13548. task:kworker/1:73 state:R running task stack:0 pid:13548 tgid:13548 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a6471c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86c53c00 r8:80200c04 r7:ea63dd54 r6:ffffffff r5:86c53c00 r4:00000000 [<81a646dc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xea63dd20 to 0xea63dd68) dd20: 94375000 ebb2f000 00000001 80239bf8 7f250000 00000001 82acb1c4 82aca5a0 dd40: 7f250000 ebb2f000 8280c9b4 ea63dd9c ea63dda0 ea63dd70 80230af0 80239c10 dd60: 80000013 ffffffff r5:80000013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e9d30>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9aac>] (__purge_vmap_area_lazy) from [<804ea0e8>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:ea63ddc0 r5:ea63de08 r4:ea63ddc0 [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85b8ae40 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86c53c00 r7:00000000 r6:83018600 r5:00001000 r4:7f268000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e017b000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85a0638c r4:85877500 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:85a0638c r4:85877500 [<802783ec>] (process_one_work) from [<802791e8>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783ec>] (process_one_work) from [<802791e8>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:86c53c00 r8:8587752c r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85877500 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85877500 r8:80278fec r7:ea7e1e60 r6:85877a00 r5:86c53c00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea63dfb0 to 0xea63dff8) dfa0: 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:84e5cfc0 INFO: task kworker/0:8:11676 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:8 state:D stack:0 pid:11676 tgid:11676 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a642e8>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a63354>] (__schedule) from [<81a642e8>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfaf1d84 r9:00000002 r8:60000013 r7:829171a0 r6:dfaf1d8c r5:8321d400 r4:8321d400 [<81a642bc>] (schedule) from [<81a646d0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:8321d400 r4:8291719c [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a66f30>] (__mutex_lock.constprop.0) from [<81a67a28>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfaf1e08 r4:00000000 [<81a67a14>] (__mutex_lock_slowpath) from [<81a67a68>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a67a2c>] (mutex_lock) from [<804e9f6c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85c0be00 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:8321d400 r7:00000000 r6:83018400 r5:00001000 r4:7f27c000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e8253000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84e2938c r4:84e0c300 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:84e2938c r4:84e0c300 [<802783ec>] (process_one_work) from [<802791e8>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783ec>] (process_one_work) from [<802791e8>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:8321d400 r8:84e0c32c r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:84e0c300 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:84e0c300 r8:80278fec r7:df9d5e60 r6:85867500 r5:8321d400 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfaf1fb0 to 0xdfaf1ff8) 1fa0: 00000000 00000000 00000000 00000000 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:858eaa80 INFO: task kworker/0:8:11676 is blocked on a mutex likely owned by task kworker/1:73:13548. task:kworker/1:73 state:R running task stack:0 pid:13548 tgid:13548 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a6471c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86c53c00 r8:80200c04 r7:ea63dd54 r6:ffffffff r5:86c53c00 r4:00000000 [<81a646dc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xea63dd20 to 0xea63dd68) dd20: 94b99000 ebb2f000 00000001 80239bf8 7f250000 00000001 82acb1c4 82aca5a0 dd40: 7f250000 ebb2f000 8280c9b4 ea63dd9c ea63dda0 ea63dd70 80230af0 80239c10 dd60: 80000013 ffffffff r5:80000013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e9d30>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9aac>] (__purge_vmap_area_lazy) from [<804ea0e8>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:ea63ddc0 r5:ea63de08 r4:ea63ddc0 [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85b8ae40 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86c53c00 r7:00000000 r6:83018600 r5:00001000 r4:7f268000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e017b000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85a0638c r4:85877500 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:85a0638c r4:85877500 [<802783ec>] (process_one_work) from [<802791e8>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783ec>] (process_one_work) from [<802791e8>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:86c53c00 r8:8587752c r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85877500 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85877500 r8:80278fec r7:ea7e1e60 r6:85877a00 r5:86c53c00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea63dfb0 to 0xea63dff8) dfa0: 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:84e5cfc0 INFO: task kworker/0:11:11721 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:11 state:D stack:0 pid:11721 tgid:11721 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a642e8>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a63354>] (__schedule) from [<81a642e8>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:e00b9d84 r9:00000002 r8:60000113 r7:829171a0 r6:e00b9d8c r5:841d3c00 r4:841d3c00 [<81a642bc>] (schedule) from [<81a646d0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:841d3c00 r4:8291719c [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a66f30>] (__mutex_lock.constprop.0) from [<81a67a28>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:e00b9e08 r4:00000000 [<81a67a14>] (__mutex_lock_slowpath) from [<81a67a68>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a67a2c>] (mutex_lock) from [<804e9f6c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85ba3c40 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:841d3c00 r7:00000000 r6:83018400 r5:00001000 r4:7f270000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e41d5000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85fe638c r4:84e0ce80 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:85fe638c r4:84e0ce80 [<802783ec>] (process_one_work) from [<802791e8>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783ec>] (process_one_work) from [<802791e8>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:841d3c00 r8:84e0ceac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:84e0ce80 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:84e0ce80 r8:80278fec r7:dfb85e60 r6:85867880 r5:841d3c00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xe00b9fb0 to 0xe00b9ff8) 9fa0: 00000000 00000000 00000000 00000000 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:858a02c0 INFO: task kworker/0:11:11721 is blocked on a mutex likely owned by task kworker/1:73:13548. task:kworker/1:73 state:R running task stack:0 pid:13548 tgid:13548 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a6471c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86c53c00 r8:80200c04 r7:ea63dd54 r6:ffffffff r5:86c53c00 r4:00000000 [<81a646dc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xea63dd20 to 0xea63dd68) dd20: 94f03000 ebb2f000 00000001 80239bf8 7f250000 00000001 82acb1c4 82aca5a0 dd40: 7f250000 ebb2f000 8280c9b4 ea63dd9c ea63dda0 ea63dd70 80230af0 80239c10 dd60: 80000013 ffffffff r5:80000013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e9d30>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9aac>] (__purge_vmap_area_lazy) from [<804ea0e8>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:ea63ddc0 r5:ea63de08 r4:ea63ddc0 [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85b8ae40 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86c53c00 r7:00000000 r6:83018600 r5:00001000 r4:7f268000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e017b000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85a0638c r4:85877500 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:85a0638c r4:85877500 [<802783ec>] (process_one_work) from [<802791e8>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783ec>] (process_one_work) from [<802791e8>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:86c53c00 r8:8587752c r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85877500 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85877500 r8:80278fec r7:ea7e1e60 r6:85877a00 r5:86c53c00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea63dfb0 to 0xea63dff8) dfa0: 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:84e5cfc0 INFO: task kworker/0:43:12210 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:43 state:D stack:0 pid:12210 tgid:12210 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a642e8>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a63354>] (__schedule) from [<81a642e8>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dffd5d84 r9:00000002 r8:60010113 r7:829171a0 r6:dffd5d8c r5:85d7bc00 r4:85d7bc00 [<81a642bc>] (schedule) from [<81a646d0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:85d7bc00 r4:8291719c [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a66f30>] (__mutex_lock.constprop.0) from [<81a67a28>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dffd5e08 r4:00000000 [<81a67a14>] (__mutex_lock_slowpath) from [<81a67a68>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a67a2c>] (mutex_lock) from [<804e9f6c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85cdd880 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:85d7bc00 r7:00000000 r6:83018400 r5:00001000 r4:7f264000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e000b000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85c50f8c r4:84dfc680 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:85c50f8c r4:84dfc680 [<802783ec>] (process_one_work) from [<802791e8>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783ec>] (process_one_work) from [<802791e8>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:85d7bc00 r8:84dfc6ac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:84dfc680 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:84dfc680 r8:80278fec r7:dfc49e60 r6:84dfcd80 r5:85d7bc00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdffd5fb0 to 0xdffd5ff8) 5fa0: 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:857728c0 INFO: task kworker/0:43:12210 is blocked on a mutex likely owned by task kworker/1:73:13548. task:kworker/1:73 state:R running task stack:0 pid:13548 tgid:13548 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a6471c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86c53c00 r8:80200c04 r7:ea63dd54 r6:ffffffff r5:86c53c00 r4:00000000 [<81a646dc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xea63dd20 to 0xea63dd68) dd20: 94f03000 ebb2f000 00000001 80239bf8 7f250000 00000001 82acb1c4 82aca5a0 dd40: 7f250000 ebb2f000 8280c9b4 ea63dd9c ea63dda0 ea63dd70 80230af0 80239c10 dd60: 80000013 ffffffff r5:80000013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e9d30>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9aac>] (__purge_vmap_area_lazy) from [<804ea0e8>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:ea63ddc0 r5:ea63de08 r4:ea63ddc0 [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85b8ae40 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86c53c00 r7:00000000 r6:83018600 r5:00001000 r4:7f268000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e017b000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85a0638c r4:85877500 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:85a0638c r4:85877500 [<802783ec>] (process_one_work) from [<802791e8>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783ec>] (process_one_work) from [<802791e8>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:86c53c00 r8:8587752c r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85877500 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85877500 r8:80278fec r7:ea7e1e60 r6:85877a00 r5:86c53c00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea63dfb0 to 0xea63dff8) dfa0: 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:84e5cfc0 NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express Call trace: [<80201a24>] (dump_backtrace) from [<80201b20>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257) r7:00000000 r6:00000113 r5:60000193 r4:82252424 [<80201b08>] (show_stack) from [<8021f8b0>] (__dump_stack lib/dump_stack.c:94 [inline]) [<80201b08>] (show_stack) from [<8021f8b0>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:120) [<8021f840>] (dump_stack_lvl) from [<8021f8d4>] (dump_stack+0x18/0x1c lib/dump_stack.c:129) r5:00000001 r4:00000001 [<8021f8bc>] (dump_stack) from [<81a4cf6c>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81a4ce0c>] (nmi_cpu_backtrace) from [<81a4d0b8>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000001 r6:8280c690 r5:8281ae34 r4:ffffffff [<81a4cf88>] (nmi_trigger_cpumask_backtrace) from [<802304fc>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:852) r9:8281ba28 r8:8280c810 r7:000a8fdd r6:00007ccf r5:82abf7d4 r4:8609d40c [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037fab0>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037fab0>] (check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037fab0>] (watchdog+0x5d0/0x850 kernel/hung_task.c:495) [<8037f4e0>] (watchdog) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:00000000 r8:8037f4e0 r7:832a2780 r6:832a2780 r5:832e3000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdf8d9fb0 to 0xdf8d9ff8) 9fa0: 00000000 00000000 00000000 00000000 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:833d5bc0 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 2822 Comm: pr/ttyAMA-1 Not tainted syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express PC is at __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] PC is at _raw_spin_unlock_irqrestore+0x28/0x54 kernel/locking/spinlock.c:194 LR is at spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] LR is at __uart_port_unlock_irqrestore include/linux/serial_core.h:616 [inline] LR is at pl011_console_device_unlock+0x20/0x24 drivers/tty/serial/amba-pl011.c:2603 pc : [<81a6d1bc>] lr : [<80a8ed48>] psr: 60000013 sp : ead45eb0 ip : ead45ec0 fp : ead45ebc r10: 82959554 r9 : 00000000 r8 : 00000000 r7 : 00000117 r6 : 829594b8 r5 : 00000000 r4 : 00000001 r3 : 00002a74 r2 : 00000000 r1 : 60000013 r0 : 84197840 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 84dfdd40 DAC: fffffffd Call trace: [<81a6d194>] (_raw_spin_unlock_irqrestore) from [<80a8ed48>] (spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]) [<81a6d194>] (_raw_spin_unlock_irqrestore) from [<80a8ed48>] (__uart_port_unlock_irqrestore include/linux/serial_core.h:616 [inline]) [<81a6d194>] (_raw_spin_unlock_irqrestore) from [<80a8ed48>] (pl011_console_device_unlock+0x20/0x24 drivers/tty/serial/amba-pl011.c:2603) [<80a8ed28>] (pl011_console_device_unlock) from [<802e3768>] (nbcon_emit_one+0x88/0x100 kernel/printk/nbcon.c:1142) [<802e36e0>] (nbcon_emit_one) from [<802e3988>] (nbcon_kthread_func+0x1a8/0x2a4 kernel/printk/nbcon.c:1229) r6:8280c690 r5:841ce000 r4:829594b8 [<802e37e0>] (nbcon_kthread_func) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:829594b8 r8:802e37e0 r7:84751b80 r6:84751b80 r5:841ce000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xead45fb0 to 0xead45ff8) 5fa0: 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:8422ef40