INFO: task kworker/0:11:3927 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:3927 tgid:3927 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a108>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a39174>] (__schedule) from [<81a3a108>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfa15d84 r9:00000002 r8:60000113 r7:82917120 r6:dfa15d8c r5:84158000 r4:84158000 [<81a3a0dc>] (schedule) from [<81a3a4f0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:84158000 r4:8291711c [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3cd50>] (__mutex_lock.constprop.0) from [<81a3d848>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfa15e08 r4:00000000 [<81a3d834>] (__mutex_lock_slowpath) from [<81a3d888>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3d84c>] (mutex_lock) from [<804e9568>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84dab400 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:84158000 r7:00000000 r6:83018400 r5:00001000 r4:7f2b8000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfc2f000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84d7178c r4:85973780 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:84d7178c r4:85973780 [<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 r9:84158000 r8:859737ac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85973780 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85973780 r8:80278fe0 r7:dfc11e60 r6:85973c80 r5:84158000 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfa15fb0 to 0xdfa15ff8) 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 r4:859574c0 INFO: task kworker/0:11:3927 is blocked on a mutex likely owned by task kworker/1:54:11122. task:kworker/1:54 state:R running task stack:0 pid:11122 tgid:11122 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a53c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86713c00 r8:80200c04 r7:dfd9dd54 r6:ffffffff r5:86713c00 r4:00000000 [<81a3a4fc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfd9dd20 to 0xdfd9dd68) dd20: cc69b000 e0673000 00000001 80239bf8 7f270000 00000001 82aca1c4 82ac95a0 dd40: 7f270000 e0673000 8280c9b4 dfd9dd9c dfd9dda0 dfd9dd70 80230af0 80239c10 dd60: 80030013 ffffffff r5:80030013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e932c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e90a8>] (__purge_vmap_area_lazy) from [<804e96e4>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfd9ddc0 r5:dfd9de08 r4:dfd9ddc0 [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:858dda80 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86713c00 r7:00000000 r6:83018600 r5:00001000 r4:7f2a6000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:df9d7000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:879d6b8c r4:85db4580 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:879d6b8c r4:85db4580 [<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 r9:86713c00 r8:85db45ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85db4580 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85db4580 r8:80278fe0 r7:dfc51e60 r6:85cb6700 r5:86713c00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfd9dfb0 to 0xdfd9dff8) 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 r4:84939b80 INFO: task kworker/0:43:10953 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:10953 tgid:10953 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a108>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a39174>] (__schedule) from [<81a3a108>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:e0629d84 r9:00000002 r8:60000113 r7:82917120 r6:e0629d8c r5:838abc00 r4:838abc00 [<81a3a0dc>] (schedule) from [<81a3a4f0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:838abc00 r4:8291711c [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3cd50>] (__mutex_lock.constprop.0) from [<81a3d848>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:e0629e08 r4:00000000 [<81a3d834>] (__mutex_lock_slowpath) from [<81a3d888>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3d84c>] (mutex_lock) from [<804e9568>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84dab200 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:838abc00 r7:00000000 r6:83018400 r5:00001000 r4:7f2c0000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfc73000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84d7238c r4:86585380 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:84d7238c r4:86585380 [<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 r9:838abc00 r8:865853ac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:86585380 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86585380 r8:80278fe0 r7:e4685e60 r6:86585400 r5:838abc00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xe0629fb0 to 0xe0629ff8) 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 r4:85e5db80 INFO: task kworker/0:43:10953 is blocked on a mutex likely owned by task kworker/1:54:11122. task:kworker/1:54 state:R running task stack:0 pid:11122 tgid:11122 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a53c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86713c00 r8:80200c04 r7:dfd9dd54 r6:ffffffff r5:86713c00 r4:00000000 [<81a3a4fc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfd9dd20 to 0xdfd9dd68) dd20: ce23c000 e0673000 00000001 80239bf8 7f270000 00000001 82aca1c4 82ac95a0 dd40: 7f270000 e0673000 8280c9b4 dfd9dd9c dfd9dda0 dfd9dd70 80230af0 80239c10 dd60: 80030013 ffffffff r5:80030013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e932c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e90a8>] (__purge_vmap_area_lazy) from [<804e96e4>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfd9ddc0 r5:dfd9de08 r4:dfd9ddc0 [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:858dda80 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86713c00 r7:00000000 r6:83018600 r5:00001000 r4:7f2a6000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:df9d7000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:879d6b8c r4:85db4580 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:879d6b8c r4:85db4580 [<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 r9:86713c00 r8:85db45ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85db4580 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85db4580 r8:80278fe0 r7:dfc51e60 r6:85cb6700 r5:86713c00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfd9dfb0 to 0xdfd9dff8) 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 r4:84939b80 INFO: task kworker/0:49:10995 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:49 state:D stack:0 pid:10995 tgid:10995 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a108>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a39174>] (__schedule) from [<81a3a108>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:e0305d84 r9:00000002 r8:60000113 r7:82917120 r6:e0305d8c r5:83316c00 r4:83316c00 [<81a3a0dc>] (schedule) from [<81a3a4f0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:83316c00 r4:8291711c [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3cd50>] (__mutex_lock.constprop.0) from [<81a3d848>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:e0305e08 r4:00000000 [<81a3d834>] (__mutex_lock_slowpath) from [<81a3d888>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3d84c>] (mutex_lock) from [<804e9568>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:858ddfc0 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:83316c00 r7:00000000 r6:83018400 r5:00001000 r4:7f2aa000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfab1000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:87fb338c r4:85e31e80 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:87fb338c r4:85e31e80 [<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 r9:83316c00 r8:85e31eac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85e31e80 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85e31e80 r8:80278fe0 r7:e0301e60 r6:85e31f00 r5:83316c00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xe0305fb0 to 0xe0305ff8) 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 r4:84fc7640 INFO: task kworker/0:49:10995 is blocked on a mutex likely owned by task kworker/1:54:11122. task:kworker/1:54 state:R running task stack:0 pid:11122 tgid:11122 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a53c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86713c00 r8:80200c04 r7:dfd9dd54 r6:ffffffff r5:86713c00 r4:00000000 [<81a3a4fc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfd9dd20 to 0xdfd9dd68) dd20: d014f000 e0673000 00000001 80239bf8 7f270000 00000001 82aca1c4 82ac95a0 dd40: 7f270000 e0673000 8280c9b4 dfd9dd9c dfd9dda0 dfd9dd70 80230af0 80239c10 dd60: 80030013 ffffffff r5:80030013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e932c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e90a8>] (__purge_vmap_area_lazy) from [<804e96e4>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfd9ddc0 r5:dfd9de08 r4:dfd9ddc0 [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:858dda80 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86713c00 r7:00000000 r6:83018600 r5:00001000 r4:7f2a6000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:df9d7000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:879d6b8c r4:85db4580 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:879d6b8c r4:85db4580 [<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 r9:86713c00 r8:85db45ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85db4580 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85db4580 r8:80278fe0 r7:dfc51e60 r6:85cb6700 r5:86713c00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfd9dfb0 to 0xdfd9dff8) 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 r4:84939b80 INFO: task kworker/0:50:11001 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:50 state:D stack:0 pid:11001 tgid:11001 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a108>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a39174>] (__schedule) from [<81a3a108>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:e0315d84 r9:00000002 r8:600f0113 r7:82917120 r6:e0315d8c r5:83aa6000 r4:83aa6000 [<81a3a0dc>] (schedule) from [<81a3a4f0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:83aa6000 r4:8291711c [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3cd50>] (__mutex_lock.constprop.0) from [<81a3d848>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:e0315e08 r4:00000000 [<81a3d834>] (__mutex_lock_slowpath) from [<81a3d888>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3d84c>] (mutex_lock) from [<804e9568>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:8656edc0 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:83aa6000 r7:00000000 r6:83018400 r5:00001000 r4:7f2b0000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfca7000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:87fb038c r4:87c3f280 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:87fb038c r4:87c3f280 [<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 r9:83aa6000 r8:87c3f2ac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:87c3f280 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:87c3f280 r8:80278fe0 r7:e0301e60 r6:87c3f300 r5:83aa6000 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xe0315fb0 to 0xe0315ff8) 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 r4:85db9dc0 INFO: task kworker/0:50:11001 is blocked on a mutex likely owned by task kworker/1:54:11122. task:kworker/1:54 state:R running task stack:0 pid:11122 tgid:11122 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a53c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86713c00 r8:80200c04 r7:dfd9dd54 r6:ffffffff r5:86713c00 r4:00000000 [<81a3a4fc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfd9dd20 to 0xdfd9dd68) dd20: d014f000 e0673000 00000001 80239bf8 7f270000 00000001 82aca1c4 82ac95a0 dd40: 7f270000 e0673000 8280c9b4 dfd9dd9c dfd9dda0 dfd9dd70 80230af0 80239c10 dd60: 80030013 ffffffff r5:80030013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e932c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e90a8>] (__purge_vmap_area_lazy) from [<804e96e4>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfd9ddc0 r5:dfd9de08 r4:dfd9ddc0 [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:858dda80 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86713c00 r7:00000000 r6:83018600 r5:00001000 r4:7f2a6000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:df9d7000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:879d6b8c r4:85db4580 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:879d6b8c r4:85db4580 [<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 r9:86713c00 r8:85db45ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85db4580 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85db4580 r8:80278fe0 r7:dfc51e60 r6:85cb6700 r5:86713c00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfd9dfb0 to 0xdfd9dff8) 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 r4:84939b80 INFO: task kworker/1:47:11046 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:47 state:D stack:0 pid:11046 tgid:11046 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a108>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a39174>] (__schedule) from [<81a3a108>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfbf9d84 r9:00000002 r8:60000013 r7:82917120 r6:dfbf9d8c r5:85fce000 r4:85fce000 [<81a3a0dc>] (schedule) from [<81a3a4f0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:85fce000 r4:8291711c [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3cd50>] (__mutex_lock.constprop.0) from [<81a3d848>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfbf9e08 r4:00000000 [<81a3d834>] (__mutex_lock_slowpath) from [<81a3d888>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3d84c>] (mutex_lock) from [<804e9568>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84dab100 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:85fce000 r7:00000000 r6:83018600 r5:00001000 r4:7f2c2000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfc75000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84d73f8c r4:86640c80 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:84d73f8c r4:86640c80 [<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 r9:85fce000 r8:86640cac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:86640c80 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86640c80 r8:80278fe0 r7:e0625e60 r6:85cb6180 r5:85fce000 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfbf9fb0 to 0xdfbf9ff8) 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 r4:8664fd40 INFO: task kworker/1:47:11046 is blocked on a mutex likely owned by task kworker/1:54:11122. task:kworker/1:54 state:R running task stack:0 pid:11122 tgid:11122 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a53c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86713c00 r8:80200c04 r7:dfd9dd54 r6:ffffffff r5:86713c00 r4:00000000 [<81a3a4fc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfd9dd20 to 0xdfd9dd68) dd20: d014f000 e0673000 00000001 80239bf8 7f270000 00000001 82aca1c4 82ac95a0 dd40: 7f270000 e0673000 8280c9b4 dfd9dd9c dfd9dda0 dfd9dd70 80230af0 80239c10 dd60: 80030013 ffffffff r5:80030013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e932c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e90a8>] (__purge_vmap_area_lazy) from [<804e96e4>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfd9ddc0 r5:dfd9de08 r4:dfd9ddc0 [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:858dda80 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86713c00 r7:00000000 r6:83018600 r5:00001000 r4:7f2a6000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:df9d7000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:879d6b8c r4:85db4580 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:879d6b8c r4:85db4580 [<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 r9:86713c00 r8:85db45ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85db4580 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85db4580 r8:80278fe0 r7:dfc51e60 r6:85cb6700 r5:86713c00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfd9dfb0 to 0xdfd9dff8) 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 r4:84939b80 INFO: task kworker/1:48:11067 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:48 state:D stack:0 pid:11067 tgid:11067 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a108>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a39174>] (__schedule) from [<81a3a108>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfe81d84 r9:00000002 r8:60000013 r7:82917120 r6:dfe81d8c r5:85fcec00 r4:85fcec00 [<81a3a0dc>] (schedule) from [<81a3a4f0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:85fcec00 r4:8291711c [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3cd50>] (__mutex_lock.constprop.0) from [<81a3d848>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfe81e08 r4:00000000 [<81a3d834>] (__mutex_lock_slowpath) from [<81a3d888>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3d84c>] (mutex_lock) from [<804e9568>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:858dde80 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:85fcec00 r7:00000000 r6:83018600 r5:00001000 r4:7f2ac000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfb42000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:879d438c r4:85db4080 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:879d438c r4:85db4080 [<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 r9:85fcec00 r8:85db40ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85db4080 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85db4080 r8:80278fe0 r7:e030de60 r6:85cb6080 r5:85fcec00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfe81fb0 to 0xdfe81ff8) 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 r4:86654f80 INFO: task kworker/1:48:11067 is blocked on a mutex likely owned by task kworker/1:54:11122. task:kworker/1:54 state:R running task stack:0 pid:11122 tgid:11122 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a53c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86713c00 r8:80200c04 r7:dfd9dd54 r6:ffffffff r5:86713c00 r4:00000000 [<81a3a4fc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfd9dd20 to 0xdfd9dd68) dd20: d014f000 e0673000 00000001 80239bf8 7f270000 00000001 82aca1c4 82ac95a0 dd40: 7f270000 e0673000 8280c9b4 dfd9dd9c dfd9dda0 dfd9dd70 80230af0 80239c10 dd60: 80030013 ffffffff r5:80030013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e932c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e90a8>] (__purge_vmap_area_lazy) from [<804e96e4>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfd9ddc0 r5:dfd9de08 r4:dfd9ddc0 [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:858dda80 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86713c00 r7:00000000 r6:83018600 r5:00001000 r4:7f2a6000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:df9d7000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:879d6b8c r4:85db4580 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:879d6b8c r4:85db4580 [<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 r9:86713c00 r8:85db45ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85db4580 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85db4580 r8:80278fe0 r7:dfc51e60 r6:85cb6700 r5:86713c00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfd9dfb0 to 0xdfd9dff8) 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 r4:84939b80 INFO: task kworker/0:52:11087 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:52 state:D stack:0 pid:11087 tgid:11087 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a108>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a39174>] (__schedule) from [<81a3a108>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfbe5d84 r9:00000002 r8:60000113 r7:82917120 r6:dfbe5d8c r5:86710c00 r4:86710c00 [<81a3a0dc>] (schedule) from [<81a3a4f0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:86710c00 r4:8291711c [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3cd50>] (__mutex_lock.constprop.0) from [<81a3d848>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfbe5e08 r4:00000000 [<81a3d834>] (__mutex_lock_slowpath) from [<81a3d888>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3d84c>] (mutex_lock) from [<804e9568>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:8656ed40 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:86710c00 r7:00000000 r6:83018400 r5:00001000 r4:7f2ae000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfbed000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:87fb1b8c r4:85cb6580 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:87fb1b8c r4:85cb6580 [<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 r9:86710c00 r8:85cb65ac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85cb6580 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85cb6580 r8:80278fe0 r7:e0301e60 r6:85cb6500 r5:86710c00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfbe5fb0 to 0xdfbe5ff8) 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 r4:8664fb80 INFO: task kworker/0:52:11087 is blocked on a mutex likely owned by task kworker/1:54:11122. task:kworker/1:54 state:R running task stack:0 pid:11122 tgid:11122 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a53c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86713c00 r8:80200c04 r7:dfd9dd54 r6:ffffffff r5:86713c00 r4:00000000 [<81a3a4fc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfd9dd20 to 0xdfd9dd68) dd20: d014f000 e0673000 00000001 80239bf8 7f270000 00000001 82aca1c4 82ac95a0 dd40: 7f270000 e0673000 8280c9b4 dfd9dd9c dfd9dda0 dfd9dd70 80230af0 80239c10 dd60: 80030013 ffffffff r5:80030013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e932c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e90a8>] (__purge_vmap_area_lazy) from [<804e96e4>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfd9ddc0 r5:dfd9de08 r4:dfd9ddc0 [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:858dda80 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86713c00 r7:00000000 r6:83018600 r5:00001000 r4:7f2a6000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:df9d7000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:879d6b8c r4:85db4580 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:879d6b8c r4:85db4580 [<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 r9:86713c00 r8:85db45ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85db4580 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85db4580 r8:80278fe0 r7:dfc51e60 r6:85cb6700 r5:86713c00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfd9dfb0 to 0xdfd9dff8) 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 r4:84939b80 INFO: task kworker/0:53:11127 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:53 state:D stack:0 pid:11127 tgid:11127 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a108>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a39174>] (__schedule) from [<81a3a108>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfd8dd84 r9:00000002 r8:600f0013 r7:82917120 r6:dfd8dd8c r5:86716000 r4:86716000 [<81a3a0dc>] (schedule) from [<81a3a4f0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:86716000 r4:8291711c [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a3a4d8>] (schedule_preempt_disabled) from [<81a3d0a0>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a3cd50>] (__mutex_lock.constprop.0) from [<81a3d848>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfd8de08 r4:00000000 [<81a3d834>] (__mutex_lock_slowpath) from [<81a3d888>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a3d84c>] (mutex_lock) from [<804e9568>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84dab700 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:86716000 r7:00000000 r6:83018400 r5:00001000 r4:7f2ba000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfc31000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84d72f8c r4:85cb6780 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:84d72f8c r4:85cb6780 [<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 r9:86716000 r8:85cb67ac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85cb6780 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85cb6780 r8:80278fe0 r7:df841e60 r6:85cb6800 r5:86716000 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfd8dfb0 to 0xdfd8dff8) 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 r4:84995680 INFO: task kworker/0:53:11127 is blocked on a mutex likely owned by task kworker/1:54:11122. task:kworker/1:54 state:R running task stack:0 pid:11122 tgid:11122 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a39174>] (__schedule) from [<81a3a53c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86713c00 r8:80200c04 r7:dfd9dd54 r6:ffffffff r5:86713c00 r4:00000000 [<81a3a4fc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfd9dd20 to 0xdfd9dd68) dd20: d014f000 e0673000 00000001 80239bf8 7f270000 00000001 82aca1c4 82ac95a0 dd40: 7f270000 e0673000 8280c9b4 dfd9dd9c dfd9dda0 dfd9dd70 80230af0 80239c10 dd60: 80030013 ffffffff r5:80030013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e932c>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82aca1e4 [<804e90a8>] (__purge_vmap_area_lazy) from [<804e96e4>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfd9ddc0 r5:dfd9de08 r4:dfd9ddc0 [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9500>] (_vm_unmap_aliases) from [<804ed348>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:858dda80 r4:00000000 [<804ed1dc>] (vfree) from [<80557f48>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:86713c00 r7:00000000 r6:83018600 r5:00001000 r4:7f2a6000 [<80557f18>] (execmem_free) from [<803c5740>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:df9d7000 [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5730>] (bpf_jit_free_exec) from [<803c5b20>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c5ab8>] (bpf_jit_free) from [<803c6bc8>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:879d6b8c r4:85db4580 [<803c6a88>] (bpf_prog_free_deferred) from [<80278594>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:879d6b8c r4:85db4580 [<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 r9:86713c00 r8:85db45ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:85db4580 [<80278fe0>] (worker_thread) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85db4580 r8:80278fe0 r7:dfc51e60 r6:85cb6700 r5:86713c00 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfd9dfb0 to 0xdfd9dff8) 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 r4:84939b80 NMI backtrace for cpu 0 CPU: 0 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 r6:00070013 r5:60070093 r4:8224dfec [<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) r5:00000000 r4:00000001 [<8021f930>] (dump_stack) from [<81a22d8c>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81a22c2c>] (nmi_cpu_backtrace) from [<81a22ed8>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000000 r6:8280c690 r5:8281ae00 r4:ffffffff [<81a22da8>] (nmi_trigger_cpumask_backtrace) from [<802304fc>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:852) r9:8281b9e8 r8:8280c810 r7:0002bb11 r6:00007e5d r5:82abe7d4 r4:8381480c [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037f2b4>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037f2b4>] (check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037f2b4>] (watchdog+0x5d0/0x850 kernel/hung_task.c:495) [<8037ece4>] (watchdog) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:00000000 r8:8037ece4 r7:8334a780 r6:8334a780 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 r4:83348f00 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 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 : [<81a4313c>] lr : [<80a8d9c8>] psr: 60010013 sp : eb84deb0 ip : eb84dec0 fp : eb84debc r10: 829594d4 r9 : 00000001 r8 : 00000000 r7 : 00000117 r6 : 82959438 r5 : 00000000 r4 : 00000001 r3 : 00000fdb r2 : 00000000 r1 : 60010013 r0 : 84ae1c40 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 8494c6c0 DAC: 00000000 Call trace: [<81a43114>] (_raw_spin_unlock_irqrestore) from [<80a8d9c8>] (spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]) [<81a43114>] (_raw_spin_unlock_irqrestore) from [<80a8d9c8>] (__uart_port_unlock_irqrestore include/linux/serial_core.h:616 [inline]) [<81a43114>] (_raw_spin_unlock_irqrestore) from [<80a8d9c8>] (pl011_console_device_unlock+0x20/0x24 drivers/tty/serial/amba-pl011.c:2603) [<80a8d9a8>] (pl011_console_device_unlock) from [<802e3090>] (nbcon_emit_one+0x88/0x100 kernel/printk/nbcon.c:1142) [<802e3008>] (nbcon_emit_one) from [<802e32b0>] (nbcon_kthread_func+0x1a8/0x2a4 kernel/printk/nbcon.c:1229) r6:8280c690 r5:8416c800 r4:82959438 [<802e3108>] (nbcon_kthread_func) from [<80280200>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:82959438 r8:802e3108 r7:84b70c80 r6:84b70c80 r5:8416c800 r4:00000001 [<802800d4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xeb84dfb0 to 0xeb84dff8) 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 r4:83370900