INFO: task kworker/1:9:11900 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:9 state:D stack:0 pid:11900 tgid:11900 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a399b4>] (__schedule) from [<81a3a948>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a399b4>] (__schedule) from [<81a3a948>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfb41d84 r9:00000002 r8:60000113 r7:82917120 r6:dfb41d8c r5:84855400 r4:84855400 [<81a3a91c>] (schedule) from [<81a3ad30>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:84855400 r4:8291711c [<81a3ad18>] (schedule_preempt_disabled) from [<81a3d8e0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3ad18>] (schedule_preempt_disabled) from [<81a3d8e0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3d590>] (__mutex_lock.constprop.0) from [<81a3e088>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfb41e08 r4:00000000 [<81a3e074>] (__mutex_lock_slowpath) from [<81a3e0c8>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3e08c>] (mutex_lock) from [<804e97d8>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85ddbb00 r4:00000000 [<804ed44c>] (vfree) from [<805581b8>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:84855400 r7:00000000 r6:83018600 r5:00001000 r4:7f246000 [<80558188>] (execmem_free) from [<803c57d0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfb59000 [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5b48>] (bpf_jit_free) from [<803c6c58>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:86bce78c r4:85790500 [<803c6b18>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:86bce78c r4:85790500 [<802783e0>] (process_one_work) from [<802791dc>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783e0>] (process_one_work) from [<802791dc>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:84855400 r8:8579052c r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85790500 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85790500 r8:80278fe0 r7:dfa8de60 r6:85aece80 r5:84855400 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfb41fb0 to 0xdfb41ff8) 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 r5:802800d4 r4:848ed900 INFO: task kworker/1:9:11900 is blocked on a mutex likely owned by task kworker/0:4:3795. task:kworker/0:4 state:R running task stack:0 pid:3795 tgid:3795 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a399b4>] (__schedule) from [<81a3ad7c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:8414b000 r8:80200c04 r7:dfe55d54 r6:ffffffff r5:8414b000 r4:00000000 [<81a3ad3c>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfe55d20 to 0xdfe55d68) 5d20: b158c000 e047b000 00000001 80239bf8 7f300000 00000001 82aca1c4 82ac95a0 5d40: 7f300000 e047b000 8280c9b4 dfe55d9c dfe55da0 dfe55d70 80230af0 80239c10 5d60: 80000013 ffffffff r5:80000013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e959c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e9318>] (__purge_vmap_area_lazy) from [<804e9954>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfe55dc0 r5:dfe55e08 r4:dfe55dc0 [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84a1bfc0 r4:00000000 [<804ed44c>] (vfree) from [<805581b8>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:8414b000 r7:00000000 r6:83018400 r5:00001000 r4:7f252000 [<80558188>] (execmem_free) from [<803c57d0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfb5f000 [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5b48>] (bpf_jit_free) from [<803c6c58>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85b84f8c r4:85cd2480 [<803c6b18>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:85b84f8c r4:85cd2480 [<802783e0>] (process_one_work) from [<802791dc>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783e0>] (process_one_work) from [<802791dc>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:8414b000 r8:85cd24ac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85cd2480 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85cd2480 r8:80278fe0 r7:df841e60 r6:85cd2580 r5:8414b000 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfe55fb0 to 0xdfe55ff8) 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 r5:802800d4 r4:85cd70c0 INFO: task kworker/1:5:18202 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:5 state:D stack:0 pid:18202 tgid:18202 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a399b4>] (__schedule) from [<81a3a948>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a399b4>] (__schedule) from [<81a3a948>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:ea775d84 r9:00000002 r8:600f0113 r7:82917120 r6:ea775d8c r5:86155400 r4:86155400 [<81a3a91c>] (schedule) from [<81a3ad30>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:86155400 r4:8291711c [<81a3ad18>] (schedule_preempt_disabled) from [<81a3d8e0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3ad18>] (schedule_preempt_disabled) from [<81a3d8e0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3d590>] (__mutex_lock.constprop.0) from [<81a3e088>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:ea775e08 r4:00000000 [<81a3e074>] (__mutex_lock_slowpath) from [<81a3e0c8>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3e08c>] (mutex_lock) from [<804e97d8>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:856ad300 r4:00000000 [<804ed44c>] (vfree) from [<805581b8>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86155400 r7:00000000 r6:83018600 r5:00001000 r4:7f26e000 [<80558188>] (execmem_free) from [<803c57d0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfbea000 [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5b48>] (bpf_jit_free) from [<803c6c58>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85b8738c r4:86b4bf80 [<803c6b18>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:85b8738c r4:86b4bf80 [<802783e0>] (process_one_work) from [<802791dc>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783e0>] (process_one_work) from [<802791dc>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:86155400 r8:86b4bfac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:86b4bf80 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86b4bf80 r8:80278fe0 r7:e0371e60 r6:86b4bc80 r5:86155400 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea775fb0 to 0xea775ff8) 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 r5:802800d4 r4:863f5fc0 INFO: task kworker/1:5:18202 is blocked on a mutex likely owned by task kworker/0:4:3795. task:kworker/0:4 state:R running task stack:0 pid:3795 tgid:3795 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a399b4>] (__schedule) from [<81a3ad7c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:8414b000 r8:80200c04 r7:dfe55d54 r6:ffffffff r5:8414b000 r4:00000000 [<81a3ad3c>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfe55d20 to 0xdfe55d68) 5d20: b158c000 e047b000 00000001 80239bf8 7f300000 00000001 82aca1c4 82ac95a0 5d40: 7f300000 e047b000 8280c9b4 dfe55d9c dfe55da0 dfe55d70 80230af0 80239c10 5d60: 80000013 ffffffff r5:80000013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e959c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e9318>] (__purge_vmap_area_lazy) from [<804e9954>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfe55dc0 r5:dfe55e08 r4:dfe55dc0 [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84a1bfc0 r4:00000000 [<804ed44c>] (vfree) from [<805581b8>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:8414b000 r7:00000000 r6:83018400 r5:00001000 r4:7f252000 [<80558188>] (execmem_free) from [<803c57d0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfb5f000 [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5b48>] (bpf_jit_free) from [<803c6c58>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85b84f8c r4:85cd2480 [<803c6b18>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:85b84f8c r4:85cd2480 [<802783e0>] (process_one_work) from [<802791dc>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783e0>] (process_one_work) from [<802791dc>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:8414b000 r8:85cd24ac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85cd2480 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85cd2480 r8:80278fe0 r7:df841e60 r6:85cd2580 r5:8414b000 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfe55fb0 to 0xdfe55ff8) 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 r5:802800d4 r4:85cd70c0 INFO: task kworker/1:17:18254 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:17 state:D stack:0 pid:18254 tgid:18254 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a399b4>] (__schedule) from [<81a3a948>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a399b4>] (__schedule) from [<81a3a948>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfd09d84 r9:00000002 r8:600f0113 r7:82917120 r6:dfd09d8c r5:832fbc00 r4:832fbc00 [<81a3a91c>] (schedule) from [<81a3ad30>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:832fbc00 r4:8291711c [<81a3ad18>] (schedule_preempt_disabled) from [<81a3d8e0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3ad18>] (schedule_preempt_disabled) from [<81a3d8e0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3d590>] (__mutex_lock.constprop.0) from [<81a3e088>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfd09e08 r4:00000000 [<81a3e074>] (__mutex_lock_slowpath) from [<81a3e0c8>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3e08c>] (mutex_lock) from [<804e97d8>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:863db080 r4:00000000 [<804ed44c>] (vfree) from [<805581b8>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:832fbc00 r7:00000000 r6:83018600 r5:00001000 r4:7f25c000 [<80558188>] (execmem_free) from [<803c57d0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfb81000 [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5b48>] (bpf_jit_free) from [<803c6c58>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85777f8c r4:86ae8300 [<803c6b18>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:85777f8c r4:86ae8300 [<802783e0>] (process_one_work) from [<802791dc>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783e0>] (process_one_work) from [<802791dc>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:832fbc00 r8:86ae832c r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:86ae8300 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86ae8300 r8:80278fe0 r7:dfb89e60 r6:870d5a80 r5:832fbc00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfd09fb0 to 0xdfd09ff8) 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 r5:802800d4 r4:870e6700 INFO: task kworker/1:17:18254 is blocked on a mutex likely owned by task kworker/0:4:3795. task:kworker/0:4 state:R running task stack:0 pid:3795 tgid:3795 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a399b4>] (__schedule) from [<81a3ad7c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:8414b000 r8:80200c04 r7:dfe55d54 r6:ffffffff r5:8414b000 r4:00000000 [<81a3ad3c>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfe55d20 to 0xdfe55d68) 5d20: b158c000 e047b000 00000001 80239bf8 7f300000 00000001 82aca1c4 82ac95a0 5d40: 7f300000 e047b000 8280c9b4 dfe55d9c dfe55da0 dfe55d70 80230af0 80239c10 5d60: 80000013 ffffffff r5:80000013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e959c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e9318>] (__purge_vmap_area_lazy) from [<804e9954>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfe55dc0 r5:dfe55e08 r4:dfe55dc0 [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84a1bfc0 r4:00000000 [<804ed44c>] (vfree) from [<805581b8>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:8414b000 r7:00000000 r6:83018400 r5:00001000 r4:7f252000 [<80558188>] (execmem_free) from [<803c57d0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfb5f000 [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5b48>] (bpf_jit_free) from [<803c6c58>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85b84f8c r4:85cd2480 [<803c6b18>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:85b84f8c r4:85cd2480 [<802783e0>] (process_one_work) from [<802791dc>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783e0>] (process_one_work) from [<802791dc>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:8414b000 r8:85cd24ac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85cd2480 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85cd2480 r8:80278fe0 r7:df841e60 r6:85cd2580 r5:8414b000 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfe55fb0 to 0xdfe55ff8) 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 r5:802800d4 r4:85cd70c0 INFO: task kworker/1:18:18261 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:18 state:D stack:0 pid:18261 tgid:18261 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a399b4>] (__schedule) from [<81a3a948>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a399b4>] (__schedule) from [<81a3a948>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfdb5d84 r9:00000002 r8:600f0013 r7:82917120 r6:dfdb5d8c r5:85de0000 r4:85de0000 [<81a3a91c>] (schedule) from [<81a3ad30>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:85de0000 r4:8291711c [<81a3ad18>] (schedule_preempt_disabled) from [<81a3d8e0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3ad18>] (schedule_preempt_disabled) from [<81a3d8e0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3d590>] (__mutex_lock.constprop.0) from [<81a3e088>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfdb5e08 r4:00000000 [<81a3e074>] (__mutex_lock_slowpath) from [<81a3e0c8>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3e08c>] (mutex_lock) from [<804e97d8>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85c0a200 r4:00000000 [<804ed44c>] (vfree) from [<805581b8>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:85de0000 r7:00000000 r6:83018600 r5:00001000 r4:7f25e000 [<80558188>] (execmem_free) from [<803c57d0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfb8b000 [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5b48>] (bpf_jit_free) from [<803c6c58>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:8577478c r4:86ae8080 [<803c6b18>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:8577478c r4:86ae8080 [<802783e0>] (process_one_work) from [<802791dc>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783e0>] (process_one_work) from [<802791dc>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:85de0000 r8:86ae80ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:86ae8080 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86ae8080 r8:80278fe0 r7:dfb89e60 r6:870d5180 r5:85de0000 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfdb5fb0 to 0xdfdb5ff8) 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 r5:802800d4 r4:870e6cc0 INFO: task kworker/1:18:18261 is blocked on a mutex likely owned by task kworker/0:4:3795. task:kworker/0:4 state:R running task stack:0 pid:3795 tgid:3795 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a399b4>] (__schedule) from [<81a3ad7c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:8414b000 r8:80200c04 r7:dfe55d54 r6:ffffffff r5:8414b000 r4:00000000 [<81a3ad3c>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfe55d20 to 0xdfe55d68) 5d20: b158c000 e047b000 00000001 80239bf8 7f300000 00000001 82aca1c4 82ac95a0 5d40: 7f300000 e047b000 8280c9b4 dfe55d9c dfe55da0 dfe55d70 80230af0 80239c10 5d60: 80000013 ffffffff r5:80000013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e959c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e9318>] (__purge_vmap_area_lazy) from [<804e9954>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfe55dc0 r5:dfe55e08 r4:dfe55dc0 [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84a1bfc0 r4:00000000 [<804ed44c>] (vfree) from [<805581b8>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:8414b000 r7:00000000 r6:83018400 r5:00001000 r4:7f252000 [<80558188>] (execmem_free) from [<803c57d0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfb5f000 [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5b48>] (bpf_jit_free) from [<803c6c58>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85b84f8c r4:85cd2480 [<803c6b18>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:85b84f8c r4:85cd2480 [<802783e0>] (process_one_work) from [<802791dc>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783e0>] (process_one_work) from [<802791dc>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:8414b000 r8:85cd24ac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85cd2480 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85cd2480 r8:80278fe0 r7:df841e60 r6:85cd2580 r5:8414b000 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfe55fb0 to 0xdfe55ff8) 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 r5:802800d4 r4:85cd70c0 INFO: task kworker/1:20:18271 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:20 state:D stack:0 pid:18271 tgid:18271 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a399b4>] (__schedule) from [<81a3a948>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a399b4>] (__schedule) from [<81a3a948>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfdcdd84 r9:00000002 r8:60000013 r7:82917120 r6:dfdcdd8c r5:86346000 r4:86346000 [<81a3a91c>] (schedule) from [<81a3ad30>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:86346000 r4:8291711c [<81a3ad18>] (schedule_preempt_disabled) from [<81a3d8e0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3ad18>] (schedule_preempt_disabled) from [<81a3d8e0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3d590>] (__mutex_lock.constprop.0) from [<81a3e088>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfdcde08 r4:00000000 [<81a3e074>] (__mutex_lock_slowpath) from [<81a3e0c8>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3e08c>] (mutex_lock) from [<804e97d8>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:856ad840 r4:00000000 [<804ed44c>] (vfree) from [<805581b8>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86346000 r7:00000000 r6:83018600 r5:00001000 r4:7f270000 [<80558188>] (execmem_free) from [<803c57d0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfbf3000 [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5b48>] (bpf_jit_free) from [<803c6c58>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85b8638c r4:86ae8700 [<803c6b18>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:85b8638c r4:86ae8700 [<802783e0>] (process_one_work) from [<802791dc>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783e0>] (process_one_work) from [<802791dc>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:86346000 r8:86ae872c r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:86ae8700 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86ae8700 r8:80278fe0 r7:dfdb5e60 r6:870d5380 r5:86346000 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfdcdfb0 to 0xdfdcdff8) 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 r5:802800d4 r4:870e6ec0 INFO: task kworker/1:20:18271 is blocked on a mutex likely owned by task kworker/0:4:3795. task:kworker/0:4 state:R running task stack:0 pid:3795 tgid:3795 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a399b4>] (__schedule) from [<81a3ad7c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:8414b000 r8:80200c04 r7:dfe55d54 r6:ffffffff r5:8414b000 r4:00000000 [<81a3ad3c>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfe55d20 to 0xdfe55d68) 5d20: b158c000 e047b000 00000001 80239bf8 7f300000 00000001 82aca1c4 82ac95a0 5d40: 7f300000 e047b000 8280c9b4 dfe55d9c dfe55da0 dfe55d70 80230af0 80239c10 5d60: 80000013 ffffffff r5:80000013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e959c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e9318>] (__purge_vmap_area_lazy) from [<804e9954>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfe55dc0 r5:dfe55e08 r4:dfe55dc0 [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9770>] (_vm_unmap_aliases) from [<804ed5b8>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84a1bfc0 r4:00000000 [<804ed44c>] (vfree) from [<805581b8>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:8414b000 r7:00000000 r6:83018400 r5:00001000 r4:7f252000 [<80558188>] (execmem_free) from [<803c57d0>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfb5f000 [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c57c0>] (bpf_jit_free_exec) from [<803c5bb0>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5b48>] (bpf_jit_free) from [<803c6c58>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85b84f8c r4:85cd2480 [<803c6b18>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:85b84f8c r4:85cd2480 [<802783e0>] (process_one_work) from [<802791dc>] (process_scheduled_works kernel/workqueue.c:3346 [inline]) [<802783e0>] (process_one_work) from [<802791dc>] (worker_thread+0x1fc/0x3d8 kernel/workqueue.c:3427) r10:61c88647 r9:8414b000 r8:85cd24ac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85cd2480 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85cd2480 r8:80278fe0 r7:df841e60 r6:85cd2580 r5:8414b000 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfe55fb0 to 0xdfe55ff8) 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 r5:802800d4 r4:85cd70c0 NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 32 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 r6:000f0013 r5:600f0093 r4:8224e098 [<80201b08>] (show_stack) from [<8021f924>] (__dump_stack lib/dump_stack.c:94 [inline]) [<80201b08>] (show_stack) from [<8021f924>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:120) [<8021f8b4>] (dump_stack_lvl) from [<8021f948>] (dump_stack+0x18/0x1c lib/dump_stack.c:129) r5:00000001 r4:00000001 [<8021f930>] (dump_stack) from [<81a235cc>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81a2346c>] (nmi_cpu_backtrace) from [<81a23718>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000001 r6:8280c690 r5:8281ae00 r4:ffffffff [<81a235e8>] (nmi_trigger_cpumask_backtrace) from [<802304fc>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:852) r9:8281b9e8 r8:8280c810 r7:000473dc r6:00007e57 r5:82abe7d4 r4:870ad10c [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037f344>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037f344>] (check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037f344>] (watchdog+0x5d0/0x850 kernel/hung_task.c:495) [<8037ed74>] (watchdog) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:00000000 r8:8037ed74 r7:8332a380 r6:8332a380 r5:83399800 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdf8e1fb0 to 0xdf8e1ff8) 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 r5:802800d4 r4:832cd340 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 2826 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 : [<81a4397c>] lr : [<80a8dc48>] psr: 60000113 sp : eb759eb0 ip : eb759ec0 fp : eb759ebc r10: 829594d4 r9 : 00000000 r8 : 00000000 r7 : 00000117 r6 : 82959438 r5 : 00000000 r4 : 00000001 r3 : 00001e99 r2 : 00000000 r1 : 60000113 r0 : 8401e440 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 8554b780 DAC: fffffffd Call trace: [<81a43954>] (_raw_spin_unlock_irqrestore) from [<80a8dc48>] (spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]) [<81a43954>] (_raw_spin_unlock_irqrestore) from [<80a8dc48>] (__uart_port_unlock_irqrestore include/linux/serial_core.h:616 [inline]) [<81a43954>] (_raw_spin_unlock_irqrestore) from [<80a8dc48>] (pl011_console_device_unlock+0x20/0x24 drivers/tty/serial/amba-pl011.c:2603) [<80a8dc28>] (pl011_console_device_unlock) from [<802e3120>] (nbcon_emit_one+0x88/0x100 kernel/printk/nbcon.c:1142) [<802e3098>] (nbcon_emit_one) from [<802e3340>] (nbcon_kthread_func+0x1a8/0x2a4 kernel/printk/nbcon.c:1229) r6:8280c690 r5:84ae6c00 r4:82959438 [<802e3198>] (nbcon_kthread_func) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:82959438 r8:802e3198 r7:84ace180 r6:84ace180 r5:84ae6c00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xeb759fb0 to 0xeb759ff8) 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 r5:802800d4 r4:83b9cf00