INFO: task kworker/1:55:29739 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:55 state:D stack:0 pid:29739 tgid:29739 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a642e8>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a63354>] (__schedule) from [<81a642e8>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:ed109d84 r9:00000002 r8:60000013 r7:829171a0 r6:ed109d8c r5:841a8c00 r4:841a8c00 [<81a642bc>] (schedule) from [<81a646d0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:841a8c00 r4:8291719c [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a66f30>] (__mutex_lock.constprop.0) from [<81a67a28>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:ed109e08 r4:00000000 [<81a67a14>] (__mutex_lock_slowpath) from [<81a67a68>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a67a2c>] (mutex_lock) from [<804e9f6c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:860f93c0 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:841a8c00 r7:00000000 r6:83018600 r5:00001000 r4:7f2e8000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfad5000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:8637b38c r4:870ace00 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:8637b38c r4:870ace00 [<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 r9:841a8c00 r8:870ace2c r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:870ace00 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:870ace00 r8:80278fec r7:ed081e60 r6:870acd00 r5:841a8c00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xed109fb0 to 0xed109ff8) 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 r4:84926dc0 INFO: task kworker/1:55:29739 is blocked on a mutex likely owned by task kworker/1:26:1538. task:kworker/1:26 state:R running task stack:0 pid:1538 tgid:1538 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a6471c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:85cc6000 r8:80200c04 r7:ea52dd54 r6:ffffffff r5:85cc6000 r4:00000000 [<81a646dc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xea52dd20 to 0xea52dd68) dd20: 8d3cb000 ea743000 00000001 80239bf8 7f23c000 00000001 82acb1c4 82aca5a0 dd40: 7f23c000 ea743000 8280c9b4 ea52dd9c ea52dda0 ea52dd70 80230af0 80239c10 dd60: 80070113 ffffffff r5:80070113 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e9d30>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9aac>] (__purge_vmap_area_lazy) from [<804ea0e8>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:ea52ddc0 r5:ea52de08 r4:ea52ddc0 [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:860f9240 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:85cc6000 r7:00000000 r6:83018600 r5:00001000 r4:7f2ae000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfacb000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:8637b78c r4:860d4600 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:8637b78c r4:860d4600 [<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 r9:85cc6000 r8:860d462c r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:860d4600 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:860d4600 r8:80278fec r7:ea389e60 r6:85598880 r5:85cc6000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea52dfb0 to 0xea52dff8) 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 r4:8708dd00 INFO: task kworker/1:28:1596 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:28 state:D stack:0 pid:1596 tgid:1596 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a642e8>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a63354>] (__schedule) from [<81a642e8>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:ea581d84 r9:00000002 r8:60070113 r7:829171a0 r6:ea581d8c r5:84916c00 r4:84916c00 [<81a642bc>] (schedule) from [<81a646d0>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:84916c00 r4:8291719c [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a646b8>] (schedule_preempt_disabled) from [<81a67280>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a66f30>] (__mutex_lock.constprop.0) from [<81a67a28>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:ea581e08 r4:00000000 [<81a67a14>] (__mutex_lock_slowpath) from [<81a67a68>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a67a2c>] (mutex_lock) from [<804e9f6c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:860f9980 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:84916c00 r7:00000000 r6:83018600 r5:00001000 r4:7f2e6000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfad3000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:86379b8c r4:86553a80 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:86379b8c r4:86553a80 [<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 r9:84916c00 r8:86553aac r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:86553a80 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86553a80 r8:80278fec r7:ea56de60 r6:85516680 r5:84916c00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea581fb0 to 0xea581ff8) 1fa0: 00000000 00000000 00000000 00000000 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802800e0 r4:859250c0 INFO: task kworker/1:28:1596 is blocked on a mutex likely owned by task kworker/1:26:1538. task:kworker/1:26 state:R running task stack:0 pid:1538 tgid:1538 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63354>] (__schedule) from [<81a6471c>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:85cc6000 r8:80200c04 r7:ea52dd54 r6:ffffffff r5:85cc6000 r4:00000000 [<81a646dc>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xea52dd20 to 0xea52dd68) dd20: 8ef15000 ea743000 00000001 80239bf8 7f23c000 00000001 82acb1c4 82aca5a0 dd40: 7f23c000 ea743000 8280c9b4 ea52dd9c ea52dda0 ea52dd70 80230af0 80239c10 dd60: 80070113 ffffffff r5:80070113 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e9d30>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9aac>] (__purge_vmap_area_lazy) from [<804ea0e8>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:ea52ddc0 r5:ea52de08 r4:ea52ddc0 [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9f04>] (_vm_unmap_aliases) from [<804edd4c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:860f9240 r4:00000000 [<804edbe0>] (vfree) from [<80558a98>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018605 r8:85cc6000 r7:00000000 r6:83018600 r5:00001000 r4:7f2ae000 [<80558a68>] (execmem_free) from [<803c5f58>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:dfacb000 [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f48>] (bpf_jit_free_exec) from [<803c6338>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62d0>] (bpf_jit_free) from [<803c73e0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:8637b78c r4:860d4600 [<803c72a0>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:ddde3d80 r6:83018600 r5:8637b78c r4:860d4600 [<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 r9:85cc6000 r8:860d462c r7:82804d40 r6:ddde3d80 r5:ddde3da0 r4:860d4600 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:860d4600 r8:80278fec r7:ea389e60 r6:85598880 r5:85cc6000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea52dfb0 to 0xea52dff8) 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 r4:8708dd00 NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express Call trace: [<80201a24>] (dump_backtrace) from [<80201b20>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257) r7:00000000 r6:00070113 r5:60070193 r4:82252424 [<80201b08>] (show_stack) from [<8021f8b0>] (__dump_stack lib/dump_stack.c:94 [inline]) [<80201b08>] (show_stack) from [<8021f8b0>] (dump_stack_lvl+0x70/0x7c lib/dump_stack.c:120) [<8021f840>] (dump_stack_lvl) from [<8021f8d4>] (dump_stack+0x18/0x1c lib/dump_stack.c:129) r5:00000001 r4:00000001 [<8021f8bc>] (dump_stack) from [<81a4cf6c>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81a4ce0c>] (nmi_cpu_backtrace) from [<81a4d0b8>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000001 r6:8280c690 r5:8281ae34 r4:ffffffff [<81a4cf88>] (nmi_trigger_cpumask_backtrace) from [<802304fc>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:852) r9:8281ba28 r8:8280c810 r7:000acf4d r6:00007e7e r5:82abf7d4 r4:83b39d0c [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037fab0>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037fab0>] (check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037fab0>] (watchdog+0x5d0/0x850 kernel/hung_task.c:495) [<8037f4e0>] (watchdog) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:00000000 r8:8037f4e0 r7:830cf500 r6:830cf500 r5:8321d400 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 r4:833dba40 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 32180 Comm: kworker/u8:2 Not tainted syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express Workqueue: events_unbound nsim_dev_trap_report_work PC is at crng_make_state+0x70/0x130 drivers/char/random.c:394 LR is at debug_smp_processor_id+0x20/0x24 lib/smp_processor_id.c:58 pc : [<80a98c50>] lr : [<81a607d8>] psr: 20080113 sp : ea285d88 ip : ea285d78 fp : ea285dac r10: 859e2900 r9 : 82b1a680 r8 : 80080113 r7 : 87082006 r6 : ea285db4 r5 : 00000006 r4 : dddce4fc r3 : 00000001 r2 : 00000000 r1 : 82252424 r0 : 00000000 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 85e9e040 DAC: fffffffd Call trace: [<80a98be0>] (crng_make_state) from [<80a98da4>] (_get_random_bytes+0x94/0x124 drivers/char/random.c:406) r9:862ad180 r8:00000006 r7:ea285df4 r6:ea285db4 r5:87082006 r4:00000006 [<80a98d10>] (_get_random_bytes) from [<80a98e44>] (get_random_bytes+0x10/0x14 drivers/char/random.c:438) r8:87082000 r7:00000060 r6:81d95f68 r5:862adf60 r4:8691a240 [<80a98e34>] (get_random_bytes) from [<80e60258>] (eth_random_addr include/linux/etherdevice.h:238 [inline]) [<80a98e34>] (get_random_bytes) from [<80e60258>] (nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:771 [inline]) [<80a98e34>] (get_random_bytes) from [<80e60258>] (nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline]) [<80a98e34>] (get_random_bytes) from [<80e60258>] (nsim_dev_trap_report_work+0x150/0x410 drivers/net/netdevsim/dev.c:866) [<80e60108>] (nsim_dev_trap_report_work) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r10:8300e870 r9:83019a05 r8:8656d400 r7:8300e600 r6:83019a00 r5:862ad180 r4:86965580 [<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 r9:8656d400 r8:869655ac r7:82804d40 r6:8300e600 r5:8300e620 r4:86965580 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86965580 r8:80278fec r7:ea30de60 r6:86965600 r5:8656d400 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea285fb0 to 0xea285ff8) 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 r4:86964b80