INFO: task kworker/0:98:14833 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:98 state:D stack:0 pid:14833 tgid:14833 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a6429c>] (__schedule) from [<81a65230>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a6429c>] (__schedule) from [<81a65230>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:ec95dd84 r9:00000002 r8:60000113 r7:829171a0 r6:ec95dd8c r5:86685400 r4:86685400 [<81a65204>] (schedule) from [<81a65618>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:86685400 r4:8291719c [<81a65600>] (schedule_preempt_disabled) from [<81a681c8>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a65600>] (schedule_preempt_disabled) from [<81a681c8>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a67e78>] (__mutex_lock.constprop.0) from [<81a68970>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:ec95de08 r4:00000000 [<81a6895c>] (__mutex_lock_slowpath) from [<81a689b0>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a68974>] (mutex_lock) from [<804ea31c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85e69440 r4:00000000 [<804edf90>] (vfree) from [<80559048>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:86685400 r7:00000000 r6:83018400 r5:00001000 r4:7f097000 [<80559018>] (execmem_free) from [<803c5f98>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfa55000 [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c6310>] (bpf_jit_free) from [<803c7420>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84eb1f8c r4:85b6d080 [<803c72e0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:84eb1f8c r4:85b6d080 [<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 r9:86685400 r8:85b6d0ac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85b6d080 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85b6d080 r8:80278fec r7:ec9c1e60 r6:85b6d280 r5:86685400 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xec95dfb0 to 0xec95dff8) 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 r4:85b623c0 INFO: task kworker/0:98:14833 is blocked on a mutex likely owned by task kworker/0:102:14860. task:kworker/0:102 state:R running task stack:0 pid:14860 tgid:14860 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a6429c>] (__schedule) from [<81a65664>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:8649e000 r8:80200c04 r7:ece51d54 r6:ffffffff r5:8649e000 r4:00000000 [<81a65624>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xece51d20 to 0xece51d68) 1d20: e0f15000 e8377000 00000001 80239bf8 7f053000 00000001 82acb1c4 82aca5a0 1d40: 7f053000 e8377000 8280c9b4 ece51d9c ece51da0 ece51d70 80230af0 80239c10 1d60: 80000113 ffffffff r5:80000113 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804ea0e0>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9e5c>] (__purge_vmap_area_lazy) from [<804ea498>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:ece51dc0 r5:ece51e08 r4:ece51dc0 [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85e69a80 r4:00000000 [<804edf90>] (vfree) from [<80559048>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:8649e000 r7:00000000 r6:83018400 r5:00001000 r4:7f099000 [<80559018>] (execmem_free) from [<803c5f98>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfa57000 [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c6310>] (bpf_jit_free) from [<803c7420>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84eb038c r4:86177100 [<803c72e0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:84eb038c r4:86177100 [<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 r9:8649e000 r8:8617712c r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:86177100 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86177100 r8:80278fec r7:ec95de60 r6:86177580 r5:8649e000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xece51fb0 to 0xece51ff8) 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 r4:85b35c40 INFO: task kworker/1:103:15093 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:103 state:D stack:0 pid:15093 tgid:15093 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a6429c>] (__schedule) from [<81a65230>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a6429c>] (__schedule) from [<81a65230>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:ea9c9d84 r9:00000002 r8:60000013 r7:829171a0 r6:ea9c9d8c r5:8655bc00 r4:8655bc00 [<81a65204>] (schedule) from [<81a65618>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:8655bc00 r4:8291719c [<81a65600>] (schedule_preempt_disabled) from [<81a681c8>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a65600>] (schedule_preempt_disabled) from [<81a681c8>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a67e78>] (__mutex_lock.constprop.0) from [<81a68970>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:ea9c9e08 r4:00000000 [<81a6895c>] (__mutex_lock_slowpath) from [<81a689b0>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a68974>] (mutex_lock) from [<804ea31c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85a85480 r4:00000000 [<804edf90>] (vfree) from [<80559048>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:8655bc00 r7:00000000 r6:83018600 r5:00001000 r4:7f05d000 [<80559018>] (execmem_free) from [<803c5f98>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e8309000 [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c6310>] (bpf_jit_free) from [<803c7420>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85a1bb8c r4:85779e80 [<803c72e0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:85a1bb8c r4:85779e80 [<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 r9:8655bc00 r8:85779eac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85779e80 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85779e80 r8:80278fec r7:ea91de60 r6:8626ff80 r5:8655bc00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea9c9fb0 to 0xea9c9ff8) 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 r4:85d35240 INFO: task kworker/1:103:15093 is blocked on a mutex likely owned by task kworker/0:102:14860. task:kworker/0:102 state:R running task stack:0 pid:14860 tgid:14860 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a6429c>] (__schedule) from [<81a65664>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:8649e000 r8:80200c04 r7:ece51d54 r6:ffffffff r5:8649e000 r4:00000000 [<81a65624>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xece51d20 to 0xece51d68) 1d20: e10fd000 e8377000 00000001 80239bf8 7f053000 00000001 82acb1c4 82aca5a0 1d40: 7f053000 e8377000 8280c9b4 ece51d9c ece51da0 ece51d70 80230af0 80239c10 1d60: 80000113 ffffffff r5:80000113 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804ea0e0>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9e5c>] (__purge_vmap_area_lazy) from [<804ea498>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:ece51dc0 r5:ece51e08 r4:ece51dc0 [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85e69a80 r4:00000000 [<804edf90>] (vfree) from [<80559048>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:8649e000 r7:00000000 r6:83018400 r5:00001000 r4:7f099000 [<80559018>] (execmem_free) from [<803c5f98>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfa57000 [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c6310>] (bpf_jit_free) from [<803c7420>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84eb038c r4:86177100 [<803c72e0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:84eb038c r4:86177100 [<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 r9:8649e000 r8:8617712c r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:86177100 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86177100 r8:80278fec r7:ec95de60 r6:86177580 r5:8649e000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xece51fb0 to 0xece51ff8) 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 r4:85b35c40 INFO: task kworker/1:112:15184 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:112 state:D stack:0 pid:15184 tgid:15184 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a6429c>] (__schedule) from [<81a65230>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a6429c>] (__schedule) from [<81a65230>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:ea9b9d84 r9:00000002 r8:60000013 r7:829171a0 r6:ea9b9d8c r5:8654e000 r4:8654e000 [<81a65204>] (schedule) from [<81a65618>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:8654e000 r4:8291719c [<81a65600>] (schedule_preempt_disabled) from [<81a681c8>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a65600>] (schedule_preempt_disabled) from [<81a681c8>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a67e78>] (__mutex_lock.constprop.0) from [<81a68970>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:ea9b9e08 r4:00000000 [<81a6895c>] (__mutex_lock_slowpath) from [<81a689b0>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a68974>] (mutex_lock) from [<804ea31c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:856af100 r4:00000000 [<804edf90>] (vfree) from [<80559048>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:8654e000 r7:00000000 r6:83018600 r5:00001000 r4:7f04f000 [<80559018>] (execmem_free) from [<803c5f98>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e008d000 [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c6310>] (bpf_jit_free) from [<803c7420>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:86655f8c r4:856d7380 [<803c72e0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:86655f8c r4:856d7380 [<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 r9:8654e000 r8:856d73ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:856d7380 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:856d7380 r8:80278fec r7:eacc5e60 r6:856d7600 r5:8654e000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea9b9fb0 to 0xea9b9ff8) 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 r4:859bd440 INFO: task kworker/1:112:15184 is blocked on a mutex likely owned by task kworker/0:102:14860. task:kworker/0:102 state:R running task stack:0 pid:14860 tgid:14860 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a6429c>] (__schedule) from [<81a65664>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:8649e000 r8:80200c04 r7:ece51d54 r6:ffffffff r5:8649e000 r4:00000000 [<81a65624>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xece51d20 to 0xece51d68) 1d20: e21c5000 e8377000 00000001 80239bf8 7f053000 00000001 82acb1c4 82aca5a0 1d40: 7f053000 e8377000 8280c9b4 ece51d9c ece51da0 ece51d70 80230af0 80239c10 1d60: 80000113 ffffffff r5:80000113 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804ea0e0>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9e5c>] (__purge_vmap_area_lazy) from [<804ea498>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:ece51dc0 r5:ece51e08 r4:ece51dc0 [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85e69a80 r4:00000000 [<804edf90>] (vfree) from [<80559048>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:8649e000 r7:00000000 r6:83018400 r5:00001000 r4:7f099000 [<80559018>] (execmem_free) from [<803c5f98>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfa57000 [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c6310>] (bpf_jit_free) from [<803c7420>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84eb038c r4:86177100 [<803c72e0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:84eb038c r4:86177100 [<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 r9:8649e000 r8:8617712c r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:86177100 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86177100 r8:80278fec r7:ec95de60 r6:86177580 r5:8649e000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xece51fb0 to 0xece51ff8) 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 r4:85b35c40 INFO: task kworker/1:115:15206 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:115 state:D stack:0 pid:15206 tgid:15206 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a6429c>] (__schedule) from [<81a65230>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a6429c>] (__schedule) from [<81a65230>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:eaec9d84 r9:00000002 r8:60000113 r7:829171a0 r6:eaec9d8c r5:86551800 r4:86551800 [<81a65204>] (schedule) from [<81a65618>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:86551800 r4:8291719c [<81a65600>] (schedule_preempt_disabled) from [<81a681c8>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a65600>] (schedule_preempt_disabled) from [<81a681c8>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a67e78>] (__mutex_lock.constprop.0) from [<81a68970>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:eaec9e08 r4:00000000 [<81a6895c>] (__mutex_lock_slowpath) from [<81a689b0>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a68974>] (mutex_lock) from [<804ea31c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84df34c0 r4:00000000 [<804edf90>] (vfree) from [<80559048>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86551800 r7:00000000 r6:83018600 r5:00001000 r4:7f049000 [<80559018>] (execmem_free) from [<803c5f98>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:df97f000 [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c6310>] (bpf_jit_free) from [<803c7420>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:855b638c r4:84d33b80 [<803c72e0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:855b638c r4:84d33b80 [<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 r9:86551800 r8:84d33bac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:84d33b80 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:84d33b80 r8:80278fec r7:eac59e60 r6:86098e80 r5:86551800 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xeaec9fb0 to 0xeaec9ff8) 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 r4:8567ff80 INFO: task kworker/1:115:15206 is blocked on a mutex likely owned by task kworker/0:102:14860. task:kworker/0:102 state:R running task stack:0 pid:14860 tgid:14860 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a6429c>] (__schedule) from [<81a65664>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:8649e000 r8:80200c04 r7:ece51d54 r6:ffffffff r5:8649e000 r4:00000000 [<81a65624>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xece51d20 to 0xece51d68) 1d20: e21c5000 e8377000 00000001 80239bf8 7f053000 00000001 82acb1c4 82aca5a0 1d40: 7f053000 e8377000 8280c9b4 ece51d9c ece51da0 ece51d70 80230af0 80239c10 1d60: 80000113 ffffffff r5:80000113 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804ea0e0>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9e5c>] (__purge_vmap_area_lazy) from [<804ea498>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:ece51dc0 r5:ece51e08 r4:ece51dc0 [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85e69a80 r4:00000000 [<804edf90>] (vfree) from [<80559048>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:8649e000 r7:00000000 r6:83018400 r5:00001000 r4:7f099000 [<80559018>] (execmem_free) from [<803c5f98>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfa57000 [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c6310>] (bpf_jit_free) from [<803c7420>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84eb038c r4:86177100 [<803c72e0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:84eb038c r4:86177100 [<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 r9:8649e000 r8:8617712c r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:86177100 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86177100 r8:80278fec r7:ec95de60 r6:86177580 r5:8649e000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xece51fb0 to 0xece51ff8) 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 r4:85b35c40 INFO: task kworker/1:116:15213 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:116 state:D stack:0 pid:15213 tgid:15213 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a6429c>] (__schedule) from [<81a65230>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a6429c>] (__schedule) from [<81a65230>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:eafddd84 r9:00000002 r8:600f0013 r7:829171a0 r6:eafddd8c r5:85552400 r4:85552400 [<81a65204>] (schedule) from [<81a65618>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:85552400 r4:8291719c [<81a65600>] (schedule_preempt_disabled) from [<81a681c8>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a65600>] (schedule_preempt_disabled) from [<81a681c8>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a67e78>] (__mutex_lock.constprop.0) from [<81a68970>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:eafdde08 r4:00000000 [<81a6895c>] (__mutex_lock_slowpath) from [<81a689b0>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a68974>] (mutex_lock) from [<804ea31c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84df3400 r4:00000000 [<804edf90>] (vfree) from [<80559048>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:85552400 r7:00000000 r6:83018600 r5:00001000 r4:7f04b000 [<80559018>] (execmem_free) from [<803c5f98>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:df981000 [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c6310>] (bpf_jit_free) from [<803c7420>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:855b678c r4:84d33180 [<803c72e0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:855b678c r4:84d33180 [<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 r9:85552400 r8:84d331ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:84d33180 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:84d33180 r8:80278fec r7:eac59e60 r6:85bb4600 r5:85552400 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xeafddfb0 to 0xeafddff8) 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 r4:8625c080 INFO: task kworker/1:116:15213 is blocked on a mutex likely owned by task kworker/0:102:14860. task:kworker/0:102 state:R running task stack:0 pid:14860 tgid:14860 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a6429c>] (__schedule) from [<81a65664>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:8649e000 r8:80200c04 r7:ece51d54 r6:ffffffff r5:8649e000 r4:00000000 [<81a65624>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xece51d20 to 0xece51d68) 1d20: e21c5000 e8377000 00000001 80239bf8 7f053000 00000001 82acb1c4 82aca5a0 1d40: 7f053000 e8377000 8280c9b4 ece51d9c ece51da0 ece51d70 80230af0 80239c10 1d60: 80000113 ffffffff r5:80000113 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804ea0e0>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9e5c>] (__purge_vmap_area_lazy) from [<804ea498>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:ece51dc0 r5:ece51e08 r4:ece51dc0 [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804ea2b4>] (_vm_unmap_aliases) from [<804ee0fc>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85e69a80 r4:00000000 [<804edf90>] (vfree) from [<80559048>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:8649e000 r7:00000000 r6:83018400 r5:00001000 r4:7f099000 [<80559018>] (execmem_free) from [<803c5f98>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfa57000 [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f88>] (bpf_jit_free_exec) from [<803c6378>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c6310>] (bpf_jit_free) from [<803c7420>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84eb038c r4:86177100 [<803c72e0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:84eb038c r4:86177100 [<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 r9:8649e000 r8:8617712c r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:86177100 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86177100 r8:80278fec r7:ec95de60 r6:86177580 r5:8649e000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xece51fb0 to 0xece51ff8) 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 r4:85b35c40 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 r6:00070013 r5:60070093 r4:82252740 [<80201b08>] (show_stack) from [<8021f8f8>] (__dump_stack lib/dump_stack.c:94 [inline]) [<80201b08>] (show_stack) from [<8021f8f8>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:120) [<8021f888>] (dump_stack_lvl) from [<8021f91c>] (dump_stack+0x18/0x1c lib/dump_stack.c:129) r5:00000001 r4:00000001 [<8021f904>] (dump_stack) from [<81a4deb4>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81a4dd54>] (nmi_cpu_backtrace) from [<81a4e000>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000001 r6:8280c690 r5:8281ae34 r4:ffffffff [<81a4ded0>] (nmi_trigger_cpumask_backtrace) from [<802304fc>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:852) r9:8281ba28 r8:8280c810 r7:00036ce2 r6:00007e70 r5:82abf7d4 r4:8605c50c [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037faf0>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037faf0>] (check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037faf0>] (watchdog+0x5d0/0x850 kernel/hung_task.c:495) [<8037f520>] (watchdog) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:00000000 r8:8037f520 r7:832a1a00 r6:832a1a00 r5:832e8c00 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 r4:8333c6c0 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 2820 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 : [<81a6e104>] lr : [<80a8f4b8>] psr: 60000113 sp : eaf71eb0 ip : eaf71ec0 fp : eaf71ebc r10: 82959594 r9 : 00000000 r8 : 00000000 r7 : 00000117 r6 : 829594f8 r5 : 00000000 r4 : 00000001 r3 : 0000123f r2 : 00000000 r1 : 60000113 r0 : 84bc0840 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 84913fc0 DAC: fffffffd Call trace: [<81a6e0dc>] (_raw_spin_unlock_irqrestore) from [<80a8f4b8>] (spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]) [<81a6e0dc>] (_raw_spin_unlock_irqrestore) from [<80a8f4b8>] (__uart_port_unlock_irqrestore include/linux/serial_core.h:616 [inline]) [<81a6e0dc>] (_raw_spin_unlock_irqrestore) from [<80a8f4b8>] (pl011_console_device_unlock+0x20/0x24 drivers/tty/serial/amba-pl011.c:2603) [<80a8f498>] (pl011_console_device_unlock) from [<802e3750>] (nbcon_emit_one+0x88/0x100 kernel/printk/nbcon.c:1142) [<802e36c8>] (nbcon_emit_one) from [<802e3970>] (nbcon_kthread_func+0x1a8/0x2a4 kernel/printk/nbcon.c:1229) r6:8280c690 r5:83b70000 r4:829594f8 [<802e37c8>] (nbcon_kthread_func) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:829594f8 r8:802e37c8 r7:84260680 r6:84260680 r5:83b70000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xeaf71fb0 to 0xeaf71ff8) 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 r4:84763a00