INFO: task kworker/0:17:8421 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:17 state:D stack:0 pid:8421 tgid:8421 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63b5c>] (__schedule) from [<81a64af0>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a63b5c>] (__schedule) from [<81a64af0>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:dfa09d84 r9:00000002 r8:60000013 r7:829171a0 r6:dfa09d8c r5:86968000 r4:86968000 [<81a64ac4>] (schedule) from [<81a64ed8>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:86968000 r4:8291719c [<81a64ec0>] (schedule_preempt_disabled) from [<81a67a88>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a64ec0>] (schedule_preempt_disabled) from [<81a67a88>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a67738>] (__mutex_lock.constprop.0) from [<81a68230>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:dfa09e08 r4:00000000 [<81a6821c>] (__mutex_lock_slowpath) from [<81a68270>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a68234>] (mutex_lock) from [<804ea36c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804ea304>] (_vm_unmap_aliases) from [<804ee14c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804ea304>] (_vm_unmap_aliases) from [<804ee14c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:868400c0 r4:00000000 [<804edfe0>] (vfree) from [<80559028>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:86968000 r7:00000000 r6:83018400 r5:00001000 r4:7f2ec000 [<80558ff8>] (execmem_free) from [<803c5fc8>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e0161000 [<803c5fb8>] (bpf_jit_free_exec) from [<803c63a8>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5fb8>] (bpf_jit_free_exec) from [<803c63a8>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c6340>] (bpf_jit_free) from [<803c7450>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:868a2f8c r4:8665b600 [<803c7310>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:868a2f8c r4:8665b600 [<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 r9:86968000 r8:8665b62c r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:8665b600 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:8665b600 r8:80278fec r7:dfbf5e60 r6:8665ba00 r5:86968000 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfa09fb0 to 0xdfa09ff8) 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 r4:85b10d00 INFO: task kworker/0:17:8421 is blocked on a mutex likely owned by task kworker/0:8:12960. task:kworker/0:8 state:R running task stack:0 pid:12960 tgid:12960 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63b5c>] (__schedule) from [<81a64f24>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:83f3c800 r8:80200c04 r7:dfc79d54 r6:ffffffff r5:83f3c800 r4:00000000 [<81a64ee4>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfc79d20 to 0xdfc79d68) 9d20: 8e8d5000 ea683000 00000001 80239bf8 7f00f000 00000001 82acb1c4 82aca5a0 9d40: 7f00f000 ea683000 8280c9b4 dfc79d9c dfc79da0 dfc79d70 80230af0 80239c10 9d60: 80020013 ffffffff r5:80020013 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804ea130>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9eac>] (__purge_vmap_area_lazy) from [<804ea4e8>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:dfc79dc0 r5:dfc79e08 r4:dfc79dc0 [<804ea304>] (_vm_unmap_aliases) from [<804ee14c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804ea304>] (_vm_unmap_aliases) from [<804ee14c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:86840940 r4:00000000 [<804edfe0>] (vfree) from [<80559028>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:83f3c800 r7:00000000 r6:83018400 r5:00001000 r4:7f2ea000 [<80558ff8>] (execmem_free) from [<803c5fc8>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:e015f000 [<803c5fb8>] (bpf_jit_free_exec) from [<803c63a8>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5fb8>] (bpf_jit_free_exec) from [<803c63a8>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c6340>] (bpf_jit_free) from [<803c7450>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:868a178c r4:85835d80 [<803c7310>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:868a178c r4:85835d80 [<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 r9:83f3c800 r8:85835dac r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85835d80 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85835d80 r8:80278fec r7:dfc75e60 r6:85835000 r5:83f3c800 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfc79fb0 to 0xdfc79ff8) 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 r4:86527fc0 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 r6:000f0013 r5:600f0093 r4:822525ec [<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 [<81a4d774>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81a4d614>] (nmi_cpu_backtrace) from [<81a4d8c0>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000001 r6:8280c690 r5:8281ae34 r4:ffffffff [<81a4d790>] (nmi_trigger_cpumask_backtrace) from [<802304fc>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:852) r9:8281ba28 r8:8280c810 r7:0005cf04 r6:00007e55 r5:82abf7d4 r4:8385850c [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037fb20>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037fb20>] (check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]) [<802304e4>] (arch_trigger_cpumask_backtrace) from [<8037fb20>] (watchdog+0x5d0/0x850 kernel/hung_task.c:495) [<8037f550>] (watchdog) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:00000000 r8:8037f550 r7:832a1700 r6:832a1700 r5:8332a400 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 r4:833d4c80 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 27476 Comm: kworker/0:70 Not tainted syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express Workqueue: wg-crypt-wg0 wg_packet_encrypt_worker PC is at do_softirq+0x60/0x64 kernel/softirq.c:526 LR is at debug_smp_processor_id+0x20/0x24 lib/smp_processor_id.c:58 pc : [<8025c430>] lr : [<81a60fe0>] psr: 60020113 sp : ea539e28 ip : df801f08 fp : ea539e3c r10: 84bd6700 r9 : 86af60c0 r8 : 0000034c r7 : 00000014 r6 : 00000000 r5 : 00000001 r4 : 60020113 r3 : 04208060 r2 : 00000000 r1 : 00000084 r0 : 00000000 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 85f90fc0 DAC: fffffffd Call trace: [<8025c3d0>] (do_softirq) from [<8025c500>] (__local_bh_enable_ip+0xcc/0xd0 kernel/softirq.c:450) r5:00000001 r4:85f08c00 [<8025c434>] (__local_bh_enable_ip) from [<81a6d878>] (__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]) [<8025c434>] (__local_bh_enable_ip) from [<81a6d878>] (_raw_spin_unlock_bh+0x34/0x38 kernel/locking/spinlock.c:210) r5:82a070eb r4:86af60c0 [<81a6d844>] (_raw_spin_unlock_bh) from [<80d1bd50>] (spin_unlock_bh include/linux/spinlock.h:396 [inline]) [<81a6d844>] (_raw_spin_unlock_bh) from [<80d1bd50>] (ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline]) [<81a6d844>] (_raw_spin_unlock_bh) from [<80d1bd50>] (wg_packet_encrypt_worker+0xc0/0x374 drivers/net/wireguard/send.c:293) [<80d1bc90>] (wg_packet_encrypt_worker) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r10:85741870 r9:8426a805 r8:85f08c00 r7:dddcfd80 r6:8426a800 r5:ff7e8364 r4:85c93e00 [<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 r9:85f08c00 r8:85c93e2c r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85c93e00 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85c93e00 r8:80278fec r7:e82bde60 r6:85c93100 r5:85f08c00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xea539fb0 to 0xea539ff8) 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 r4:86f1a000