INFO: task kworker/1:30:4294 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:30 state:D stack:0 pid:4294 tgid:4294 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63234>] (__schedule) from [<81a641c8>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a63234>] (__schedule) from [<81a641c8>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfba9d84 r9:00000002 r8:60000013 r7:829171a0 r6:dfba9d8c r5:84e05400 r4:84e05400 [<81a6419c>] (schedule) from [<81a645b0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:84e05400 r4:8291719c [<81a64598>] (schedule_preempt_disabled) from [<81a67160>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a64598>] (schedule_preempt_disabled) from [<81a67160>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a66e10>] (__mutex_lock.constprop.0) from [<81a67908>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfba9e08 r4:00000000 [<81a678f4>] (__mutex_lock_slowpath) from [<81a67948>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a6790c>] (mutex_lock) from [<804e9e3c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9dd4>] (_vm_unmap_aliases) from [<804edc1c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9dd4>] (_vm_unmap_aliases) from [<804edc1c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84e72500 r4:00000000 [<804edab0>] (vfree) from [<80558908>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:84e05400 r7:00000000 r6:83018600 r5:00001000 r4:7f057000 [<805588d8>] (execmem_free) from [<803c5e38>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e4261000 [<803c5e28>] (bpf_jit_free_exec) from [<803c6218>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5e28>] (bpf_jit_free_exec) from [<803c6218>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c61b0>] (bpf_jit_free) from [<803c72c0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:8584db8c r4:84e69d80 [<803c7180>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:8584db8c r4:84e69d80 [<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 r9:84e05400 r8:84e69dac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:84e69d80 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:84e69d80 r8:80278fec r7:ea3ade60 r6:84e2fb80 r5:84e05400 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfba9fb0 to 0xdfba9ff8) 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 r4:84e6b880 INFO: task kworker/1:30:4294 is blocked on a mutex likely owned by task kworker/1:39:4319. task:kworker/1:39 state:R running task stack:0 pid:4319 tgid:4319 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63234>] (__schedule) from [<81a645fc>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:84ee2400 r8:80200c04 r7:dfa9dd54 r6:ffffffff r5:84ee2400 r4:00000000 [<81a645bc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfa9dd20 to 0xdfa9dd68) dd20: bfddb000 ebbe7000 00000001 80239bf8 7f047000 00000001 82acb1c4 82aca5a0 dd40: 7f047000 ebbe7000 8280c9b4 dfa9dd9c dfa9dda0 dfa9dd70 80230af0 80239c10 dd60: 80000113 ffffffff r5:80000113 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e9c00>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e997c>] (__purge_vmap_area_lazy) from [<804e9fb8>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfa9ddc0 r5:dfa9de08 r4:dfa9ddc0 [<804e9dd4>] (_vm_unmap_aliases) from [<804edc1c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9dd4>] (_vm_unmap_aliases) from [<804edc1c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84d8fec0 r4:00000000 [<804edab0>] (vfree) from [<80558908>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:84ee2400 r7:00000000 r6:83018600 r5:00001000 r4:7f053000 [<805588d8>] (execmem_free) from [<803c5e38>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e006b000 [<803c5e28>] (bpf_jit_free_exec) from [<803c6218>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5e28>] (bpf_jit_free_exec) from [<803c6218>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c61b0>] (bpf_jit_free) from [<803c72c0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84f24f8c r4:84e76780 [<803c7180>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:84f24f8c r4:84e76780 [<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 r9:84ee2400 r8:84e767ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:84e76780 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:84e76780 r8:80278fec r7:e01f9e60 r6:84e76800 r5:84ee2400 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfa9dfb0 to 0xdfa9dff8) 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 r4:84e79d00 INFO: task kworker/1:33:4300 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:33 state:D stack:0 pid:4300 tgid:4300 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63234>] (__schedule) from [<81a641c8>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a63234>] (__schedule) from [<81a641c8>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfc95d84 r9:00000002 r8:60000013 r7:829171a0 r6:dfc95d8c r5:857a3000 r4:857a3000 [<81a6419c>] (schedule) from [<81a645b0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:857a3000 r4:8291719c [<81a64598>] (schedule_preempt_disabled) from [<81a67160>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a64598>] (schedule_preempt_disabled) from [<81a67160>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a66e10>] (__mutex_lock.constprop.0) from [<81a67908>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfc95e08 r4:00000000 [<81a678f4>] (__mutex_lock_slowpath) from [<81a67948>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a6790c>] (mutex_lock) from [<804e9e3c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9dd4>] (_vm_unmap_aliases) from [<804edc1c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9dd4>] (_vm_unmap_aliases) from [<804edc1c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84e72f00 r4:00000000 [<804edab0>] (vfree) from [<80558908>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:857a3000 r7:00000000 r6:83018600 r5:00001000 r4:7f055000 [<805588d8>] (execmem_free) from [<803c5e38>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e0169000 [<803c5e28>] (bpf_jit_free_exec) from [<803c6218>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5e28>] (bpf_jit_free_exec) from [<803c6218>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c61b0>] (bpf_jit_free) from [<803c72c0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84f5578c r4:84e69d00 [<803c7180>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:84f5578c r4:84e69d00 [<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 r9:857a3000 r8:84e69d2c r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:84e69d00 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:84e69d00 r8:80278fec r7:dfba9e60 r6:84e69800 r5:857a3000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfc95fb0 to 0xdfc95ff8) 5fa0: 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:84e2b2c0 INFO: task kworker/1:33:4300 is blocked on a mutex likely owned by task kworker/1:39:4319. task:kworker/1:39 state:R running task stack:0 pid:4319 tgid:4319 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63234>] (__schedule) from [<81a645fc>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:84ee2400 r8:80200c04 r7:dfa9dd54 r6:ffffffff r5:84ee2400 r4:00000000 [<81a645bc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfa9dd20 to 0xdfa9dd68) dd20: c150c000 ebbe7000 00000001 80239bf8 7f047000 00000001 82acb1c4 82aca5a0 dd40: 7f047000 ebbe7000 8280c9b4 dfa9dd9c dfa9dda0 dfa9dd70 80230af0 80239c10 dd60: 80000113 ffffffff r5:80000113 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e9c00>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e997c>] (__purge_vmap_area_lazy) from [<804e9fb8>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfa9ddc0 r5:dfa9de08 r4:dfa9ddc0 [<804e9dd4>] (_vm_unmap_aliases) from [<804edc1c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9dd4>] (_vm_unmap_aliases) from [<804edc1c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:84d8fec0 r4:00000000 [<804edab0>] (vfree) from [<80558908>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:84ee2400 r7:00000000 r6:83018600 r5:00001000 r4:7f053000 [<805588d8>] (execmem_free) from [<803c5e38>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e006b000 [<803c5e28>] (bpf_jit_free_exec) from [<803c6218>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5e28>] (bpf_jit_free_exec) from [<803c6218>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c61b0>] (bpf_jit_free) from [<803c72c0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:84f24f8c r4:84e76780 [<803c7180>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:84f24f8c r4:84e76780 [<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 r9:84ee2400 r8:84e767ac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:84e76780 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:84e76780 r8:80278fec r7:e01f9e60 r6:84e76800 r5:84ee2400 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfa9dfb0 to 0xdfa9dff8) 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 r4:84e79d00 NMI backtrace for cpu 0 CPU: 0 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 r6:000e0013 r5:600e0093 r4:82252488 [<80201b08>] (show_stack) from [<8021f93c>] (__dump_stack lib/dump_stack.c:94 [inline]) [<80201b08>] (show_stack) from [<8021f93c>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:120) [<8021f8cc>] (dump_stack_lvl) from [<8021f960>] (dump_stack+0x18/0x1c lib/dump_stack.c:129) r5:00000000 r4:00000001 [<8021f948>] (dump_stack) from [<81a4ce4c>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81a4ccec>] (nmi_cpu_backtrace) from [<81a4cf98>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000000 r6:8280c690 r5:8281ae34 r4:ffffffff [<81a4ce68>] (nmi_trigger_cpumask_backtrace) from [<802304fc>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:852) r9:8281ba28 r8:8280c810 r7:00023fdb r6:00007bfa r5:82abf7d4 r4:85c66c0c [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037f9a8>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037f9a8>] (check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037f9a8>] (watchdog+0x5d0/0x850 kernel/hung_task.c:495) [<8037f3d8>] (watchdog) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:00000000 r8:8037f3d8 r7:83844000 r6:83844000 r5:832e2400 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 r4:833c9900 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7520 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express PC is at sanitize_fault_flags mm/memory.c:6422 [inline] PC is at handle_mm_fault+0x54/0x14e0 mm/memory.c:6462 LR is at do_page_fault+0x1c8/0x49c arch/arm/mm/fault.c:327 pc : [<804cfbec>] lr : [<802342f0>] psr: 40000113 sp : ebc9de70 ip : ebc9df28 fp : ebc9df24 r10: ebc9dfb0 r9 : 8566e700 r8 : 84c34180 r7 : 85cbc800 r6 : 7ec7fff0 r5 : 85cbc800 r4 : 00001255 r3 : 00000001 r2 : 00001255 r1 : 7ec7fff0 r0 : 85cbceb0 Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 84c09bc0 DAC: 00000000 Call trace: [<804cfb98>] (handle_mm_fault) from [<802342f0>] (do_page_fault+0x1c8/0x49c arch/arm/mm/fault.c:327) r10:00000002 r9:8566e700 r8:00000255 r7:85cbc800 r6:00000a0b r5:7ec7fff0 r4:ebc9dfb0 [<80234128>] (do_page_fault) from [<802347ac>] (do_DataAbort+0x38/0xa8 arch/arm/mm/fault.c:595) r10:7ec805a0 r9:7ec80a38 r8:80234128 r7:ebc9dfb0 r6:7ec7fff0 r5:00000a0b r4:8281d108 [<80234774>] (do_DataAbort) from [<80200edc>] (__dabt_usr+0x5c/0x60 arch/arm/kernel/entry-armv.S:434) Exception stack(0xebc9dfb0 to 0xebc9dff8) dfa0: 0018b0a8 00000025 7ec80a38 0018b0a8 dfc0: 00000000 002e8000 7ec804f8 fbad8001 0018b0a8 7ec80a38 7ec805a0 7ec80a38 dfe0: 002e8000 7ec80000 000fc6b0 00118610 60000010 ffffffff r8:826b8044 r7:85cbc800 r6:ffffffff r5:60000010 r4:00118610