INFO: task kworker/0:12:17138 blocked for more than 430 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:12 state:D stack:0 pid:17138 tgid:17138 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81bae21c>] (__schedule) from [<81baf6b4>] (__schedule_loop kernel/sched/core.c:7361 [inline]) [<81bae21c>] (__schedule) from [<81baf6b4>] (schedule+0x2c/0xec kernel/sched/core.c:7376) r10:dfa9ddac r9:dfa9ddb4 r8:00000002 r7:600f0013 r6:82cd70cc r5:847e1900 r4:847e1900 [<81baf688>] (schedule) from [<81baf7f8>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7433) r5:847e1900 r4:82cd70c8 [<81baf7e0>] (schedule_preempt_disabled) from [<81bb2974>] (__mutex_lock_common kernel/locking/mutex.c:726 [inline]) [<81baf7e0>] (schedule_preempt_disabled) from [<81bb2974>] (__mutex_lock.constprop.0+0x50c/0xa48 kernel/locking/mutex.c:821) [<81bb2468>] (__mutex_lock.constprop.0) from [<81bb2f84>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1164) r10:82a0b484 r9:00800000 r8:00000000 r7:ffffffff r6:00000000 r5:dfa9de30 r4:86367c00 [<81bb2f70>] (__mutex_lock_slowpath) from [<81bb2fc4>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:319) [<81bb2f88>] (mutex_lock) from [<8052f064>] (_vm_unmap_aliases+0x5c/0x238 mm/vmalloc.c:2973) [<8052f008>] (_vm_unmap_aliases) from [<80532f2c>] (vm_reset_perms mm/vmalloc.c:3404 [inline]) [<8052f008>] (_vm_unmap_aliases) from [<80532f2c>] (vfree+0x110/0x17c mm/vmalloc.c:3508) r10:8302b005 r9:00800000 r8:ffffffff r7:00000001 r6:00000000 r5:00000000 r4:86367c00 [<80532e1c>] (vfree) from [<805ad734>] (execmem_free+0x34/0x54 mm/execmem.c:507) r8:847e1900 r7:00000000 r6:8302b000 r5:00001000 r4:7f04f000 [<805ad700>] (execmem_free) from [<803e2084>] (bpf_jit_free_exec kernel/bpf/core.c:1134 [inline]) [<805ad700>] (execmem_free) from [<803e2084>] (bpf_jit_binary_free kernel/bpf/core.c:1180 [inline]) [<805ad700>] (execmem_free) from [<803e2084>] (bpf_jit_free+0x64/0xe0 kernel/bpf/core.c:1304) r5:00001000 r4:df9ef000 [<803e2020>] (bpf_jit_free) from [<803e31c4>] (bpf_prog_free_deferred+0x148/0x160 kernel/bpf/core.c:3107) r5:865d9f98 r4:865d9f98 [<803e307c>] (bpf_prog_free_deferred) from [<8027714c>] (process_one_work+0x1f8/0x5cc kernel/workqueue.c:3396) r7:dddd1180 r6:8302b000 r5:865d9f98 r4:86abc700 [<80276f54>] (process_one_work) from [<80277e74>] (process_scheduled_works kernel/workqueue.c:3479 [inline]) [<80276f54>] (process_one_work) from [<80277e74>] (worker_thread+0x16c/0x318 kernel/workqueue.c:3560) r10:dddd1180 r9:86abc730 r8:847e1900 r7:82a03d80 r6:dddd11a0 r5:dddd1180 r4:86abc700 [<80277d08>] (worker_thread) from [<802828bc>] (kthread+0x11c/0x154 kernel/kthread.c:436) r10:00000000 r9:e03b1e88 r8:86abc980 r7:86abc700 r6:80277d08 r5:847e1900 r4:868b9480 [<802827a0>] (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 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802827a0 r4:868b9480 INFO: task kworker/0:12:17138 is blocked on a mutex likely owned by task kworker/0:14:17155. task:kworker/0:14 state:R running task stack:0 pid:17155 tgid:17155 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81bae21c>] (__schedule) from [<81bafaa4>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7606) r10:82a0b4d8 r9:84f70c80 r8:80200c04 r7:dfa95d84 r6:ffffffff r5:84f70c80 r4:00000000 [<81bafa64>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfa95d50 to 0xdfa95d98) 5d40: 98136000 ea85b000 00000000 802397d0 5d60: 82cd6460 82cd70a4 7f045000 ea85b000 00000000 00000001 82a0b4d8 dfa95dc4 5d80: ea85b000 dfa95da0 802306a4 802397e8 80000013 ffffffff r5:80000013 r4:802397e8 [<80230644>] (flush_tlb_kernel_range) from [<8052ee18>] (__purge_vmap_area_lazy+0x28c/0x47c mm/vmalloc.c:2398) [<8052eb8c>] (__purge_vmap_area_lazy) from [<8052f1f0>] (_vm_unmap_aliases+0x1e8/0x238 mm/vmalloc.c:3012) r10:00000000 r9:dfa95de8 r8:00000000 r7:ffffffff r6:00000008 r5:dfa95e30 r4:dfa95de8 [<8052f008>] (_vm_unmap_aliases) from [<80532f2c>] (vm_reset_perms mm/vmalloc.c:3404 [inline]) [<8052f008>] (_vm_unmap_aliases) from [<80532f2c>] (vfree+0x110/0x17c mm/vmalloc.c:3508) r10:8302b005 r9:00800000 r8:ffffffff r7:00000001 r6:00000000 r5:00000000 r4:864e6f80 [<80532e1c>] (vfree) from [<805ad734>] (execmem_free+0x34/0x54 mm/execmem.c:507) r8:84f70c80 r7:00000000 r6:8302b000 r5:00001000 r4:7f04d000 [<805ad700>] (execmem_free) from [<803e2084>] (bpf_jit_free_exec kernel/bpf/core.c:1134 [inline]) [<805ad700>] (execmem_free) from [<803e2084>] (bpf_jit_binary_free kernel/bpf/core.c:1180 [inline]) [<805ad700>] (execmem_free) from [<803e2084>] (bpf_jit_free+0x64/0xe0 kernel/bpf/core.c:1304) r5:00001000 r4:df9dd000 [<803e2020>] (bpf_jit_free) from [<803e31c4>] (bpf_prog_free_deferred+0x148/0x160 kernel/bpf/core.c:3107) r5:865db398 r4:865db398 [<803e307c>] (bpf_prog_free_deferred) from [<8027714c>] (process_one_work+0x1f8/0x5cc kernel/workqueue.c:3396) r7:dddd1180 r6:8302b000 r5:865db398 r4:86ee3a00 [<80276f54>] (process_one_work) from [<80277e74>] (process_scheduled_works kernel/workqueue.c:3479 [inline]) [<80276f54>] (process_one_work) from [<80277e74>] (worker_thread+0x16c/0x318 kernel/workqueue.c:3560) r10:dddd1180 r9:86ee3a30 r8:84f70c80 r7:82a03d80 r6:dddd11a0 r5:dddd1180 r4:86ee3a00 [<80277d08>] (worker_thread) from [<802828bc>] (kthread+0x11c/0x154 kernel/kthread.c:436) r10:00000000 r9:dfa9de88 r8:86799e80 r7:86ee3a00 r6:80277d08 r5:84f70c80 r4:88e60080 [<802827a0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfa95fb0 to 0xdfa95ff8) 5fa0: 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802827a0 r4:88e60080 INFO: task kworker/0:18:17219 blocked for more than 431 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:18 state:D stack:0 pid:17219 tgid:17219 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81bae21c>] (__schedule) from [<81baf6b4>] (__schedule_loop kernel/sched/core.c:7361 [inline]) [<81bae21c>] (__schedule) from [<81baf6b4>] (schedule+0x2c/0xec kernel/sched/core.c:7376) r10:dfb2ddac r9:dfb2ddb4 r8:00000002 r7:60000013 r6:82cd70cc r5:847dbe80 r4:847dbe80 [<81baf688>] (schedule) from [<81baf7f8>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7433) r5:847dbe80 r4:82cd70c8 [<81baf7e0>] (schedule_preempt_disabled) from [<81bb2974>] (__mutex_lock_common kernel/locking/mutex.c:726 [inline]) [<81baf7e0>] (schedule_preempt_disabled) from [<81bb2974>] (__mutex_lock.constprop.0+0x50c/0xa48 kernel/locking/mutex.c:821) [<81bb2468>] (__mutex_lock.constprop.0) from [<81bb2f84>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1164) r10:82a0b484 r9:00800000 r8:00000000 r7:ffffffff r6:00000000 r5:dfb2de30 r4:86dc37c0 [<81bb2f70>] (__mutex_lock_slowpath) from [<81bb2fc4>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:319) [<81bb2f88>] (mutex_lock) from [<8052f064>] (_vm_unmap_aliases+0x5c/0x238 mm/vmalloc.c:2973) [<8052f008>] (_vm_unmap_aliases) from [<80532f2c>] (vm_reset_perms mm/vmalloc.c:3404 [inline]) [<8052f008>] (_vm_unmap_aliases) from [<80532f2c>] (vfree+0x110/0x17c mm/vmalloc.c:3508) r10:8302b005 r9:00800000 r8:ffffffff r7:00000001 r6:00000000 r5:00000000 r4:86dc37c0 [<80532e1c>] (vfree) from [<805ad734>] (execmem_free+0x34/0x54 mm/execmem.c:507) r8:847dbe80 r7:00000000 r6:8302b000 r5:00001000 r4:7f049000 [<805ad700>] (execmem_free) from [<803e2084>] (bpf_jit_free_exec kernel/bpf/core.c:1134 [inline]) [<805ad700>] (execmem_free) from [<803e2084>] (bpf_jit_binary_free kernel/bpf/core.c:1180 [inline]) [<805ad700>] (execmem_free) from [<803e2084>] (bpf_jit_free+0x64/0xe0 kernel/bpf/core.c:1304) r5:00001000 r4:dfc83000 [<803e2020>] (bpf_jit_free) from [<803e31c4>] (bpf_prog_free_deferred+0x148/0x160 kernel/bpf/core.c:3107) r5:865d6f98 r4:865d6f98 [<803e307c>] (bpf_prog_free_deferred) from [<8027714c>] (process_one_work+0x1f8/0x5cc kernel/workqueue.c:3396) r7:dddd1180 r6:8302b000 r5:865d6f98 r4:88dfc980 [<80276f54>] (process_one_work) from [<80277e74>] (process_scheduled_works kernel/workqueue.c:3479 [inline]) [<80276f54>] (process_one_work) from [<80277e74>] (worker_thread+0x16c/0x318 kernel/workqueue.c:3560) r10:00000000 r9:88dfc9b0 r8:847dbe80 r7:82a03d80 r6:dddd11a0 r5:dddd1180 r4:88dfc980 [<80277d08>] (worker_thread) from [<802828bc>] (kthread+0x11c/0x154 kernel/kthread.c:436) r10:00000000 r9:dfaa5e88 r8:86de7000 r7:88dfc980 r6:80277d08 r5:847dbe80 r4:869b2c80 [<802827a0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfb2dfb0 to 0xdfb2dff8) dfa0: 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802827a0 r4:869b2c80 INFO: task kworker/0:18:17219 is blocked on a mutex likely owned by task kworker/0:14:17155. task:kworker/0:14 state:R running task stack:0 pid:17155 tgid:17155 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81bae21c>] (__schedule) from [<81bafaa4>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7606) r10:82a0b4d8 r9:84f70c80 r8:80200c04 r7:dfa95d84 r6:ffffffff r5:84f70c80 r4:00000000 [<81bafa64>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xdfa95d50 to 0xdfa95d98) 5d40: 98484000 ea85b000 00000000 802397d0 5d60: 82cd6460 82cd70a4 7f045000 ea85b000 00000000 00000001 82a0b4d8 dfa95dc4 5d80: ea85b000 dfa95da0 802306a4 802397e8 80000013 ffffffff r5:80000013 r4:802397e8 [<80230644>] (flush_tlb_kernel_range) from [<8052ee18>] (__purge_vmap_area_lazy+0x28c/0x47c mm/vmalloc.c:2398) [<8052eb8c>] (__purge_vmap_area_lazy) from [<8052f1f0>] (_vm_unmap_aliases+0x1e8/0x238 mm/vmalloc.c:3012) r10:00000000 r9:dfa95de8 r8:00000000 r7:ffffffff r6:00000008 r5:dfa95e30 r4:dfa95de8 [<8052f008>] (_vm_unmap_aliases) from [<80532f2c>] (vm_reset_perms mm/vmalloc.c:3404 [inline]) [<8052f008>] (_vm_unmap_aliases) from [<80532f2c>] (vfree+0x110/0x17c mm/vmalloc.c:3508) r10:8302b005 r9:00800000 r8:ffffffff r7:00000001 r6:00000000 r5:00000000 r4:864e6f80 [<80532e1c>] (vfree) from [<805ad734>] (execmem_free+0x34/0x54 mm/execmem.c:507) r8:84f70c80 r7:00000000 r6:8302b000 r5:00001000 r4:7f04d000 [<805ad700>] (execmem_free) from [<803e2084>] (bpf_jit_free_exec kernel/bpf/core.c:1134 [inline]) [<805ad700>] (execmem_free) from [<803e2084>] (bpf_jit_binary_free kernel/bpf/core.c:1180 [inline]) [<805ad700>] (execmem_free) from [<803e2084>] (bpf_jit_free+0x64/0xe0 kernel/bpf/core.c:1304) r5:00001000 r4:df9dd000 [<803e2020>] (bpf_jit_free) from [<803e31c4>] (bpf_prog_free_deferred+0x148/0x160 kernel/bpf/core.c:3107) r5:865db398 r4:865db398 [<803e307c>] (bpf_prog_free_deferred) from [<8027714c>] (process_one_work+0x1f8/0x5cc kernel/workqueue.c:3396) r7:dddd1180 r6:8302b000 r5:865db398 r4:86ee3a00 [<80276f54>] (process_one_work) from [<80277e74>] (process_scheduled_works kernel/workqueue.c:3479 [inline]) [<80276f54>] (process_one_work) from [<80277e74>] (worker_thread+0x16c/0x318 kernel/workqueue.c:3560) r10:dddd1180 r9:86ee3a30 r8:84f70c80 r7:82a03d80 r6:dddd11a0 r5:dddd1180 r4:86ee3a00 [<80277d08>] (worker_thread) from [<802828bc>] (kthread+0x11c/0x154 kernel/kthread.c:436) r10:00000000 r9:dfa9de88 r8:86799e80 r7:86ee3a00 r6:80277d08 r5:84f70c80 r4:88e60080 [<802827a0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdfa95fb0 to 0xdfa95ff8) 5fa0: 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802827a0 r4:88e60080 NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 29 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: ARM-Versatile Express Call trace: [<80201a08>] (dump_backtrace) from [<80201afc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257) r7:60000093 r6:60000093 r5:823084a8 r4:00000000 [<80201ae4>] (show_stack) from [<8021e838>] (__dump_stack lib/dump_stack.c:94 [inline]) [<80201ae4>] (show_stack) from [<8021e838>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120) [<8021e7dc>] (dump_stack_lvl) from [<8021e864>] (dump_stack+0x18/0x1c lib/dump_stack.c:129) r7:00000000 r6:00000013 r5:00000000 r4:00000001 [<8021e84c>] (dump_stack) from [<81b97844>] (nmi_cpu_backtrace+0x150/0x170 lib/nmi_backtrace.c:123) [<81b976f4>] (nmi_cpu_backtrace) from [<81b97998>] (nmi_trigger_cpumask_backtrace+0x134/0x208 lib/nmi_backtrace.c:66) r7:82a0b194 r6:83338c80 r5:82a17cb8 r4:ffffffff [<81b97864>] (nmi_trigger_cpumask_backtrace) from [<802300c8>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:851) r9:82a0b330 r8:00000048 r7:0000000a r6:82a03d80 r5:00007eca r4:00000048 [<802300b0>] (arch_trigger_cpumask_backtrace) from [<81b976f0>] (cpumask_backtrace+0x10/0x14 lib/nmi_backtrace.c:136) [<81b976e0>] (cpumask_backtrace) from [<81b9f4d8>] (trigger_all_cpu_backtrace include/linux/nmi.h:164 [inline]) [<81b976e0>] (cpumask_backtrace) from [<81b9f4d8>] (__sys_info lib/sys_info.c:157 [inline]) [<81b976e0>] (cpumask_backtrace) from [<81b9f4d8>] (sys_info+0x68/0xa8 lib/sys_info.c:165) [<81b9f470>] (sys_info) from [<80394110>] (check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]) [<81b9f470>] (sys_info) from [<80394110>] (watchdog+0x3ac/0x850 kernel/hung_task.c:561) r5:00007eca r4:00000002 [<80393d64>] (watchdog) from [<802828bc>] (kthread+0x11c/0x154 kernel/kthread.c:436) r10:00000000 r9:df819e60 r8:831ee600 r7:00000000 r6:80393d64 r5:83338c80 r4:833f4080 [<802827a0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdf8d5fb0 to 0xdf8d5ff8) 5fa0: 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802827a0 r4:833f4080