INFO: task kworker/0:18:17269 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:18 state:D stack:0 pid:17269 tgid:17269 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63614>] (__schedule) from [<81a645a8>] (__schedule_loop kernel/sched/core.c:7011 [inline]) [<81a63614>] (__schedule) from [<81a645a8>] (schedule+0x2c/0x130 kernel/sched/core.c:7026) r10:e4149d84 r9:00000002 r8:60000013 r7:829171a0 r6:e4149d8c r5:849bbc00 r4:849bbc00 [<81a6457c>] (schedule) from [<81a64990>] (schedule_preempt_disabled+0x18/0x24 kernel/sched/core.c:7083) r5:849bbc00 r4:8291719c [<81a64978>] (schedule_preempt_disabled) from [<81a67540>] (__mutex_lock_common kernel/locking/mutex.c:676 [inline]) [<81a64978>] (schedule_preempt_disabled) from [<81a67540>] (__mutex_lock.constprop.0+0x350/0xa24 kernel/locking/mutex.c:760) [<81a671f0>] (__mutex_lock.constprop.0) from [<81a67ce8>] (__mutex_lock_slowpath+0x14/0x18 kernel/locking/mutex.c:1049) r10:8280c960 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:e4149e08 r4:00000000 [<81a67cd4>] (__mutex_lock_slowpath) from [<81a67d28>] (mutex_lock+0x3c/0x40 kernel/locking/mutex.c:274) [<81a67cec>] (mutex_lock) from [<804e9f5c>] (_vm_unmap_aliases+0x68/0x240 mm/vmalloc.c:2918) [<804e9ef4>] (_vm_unmap_aliases) from [<804edd3c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9ef4>] (_vm_unmap_aliases) from [<804edd3c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:858422c0 r4:00000000 [<804edbd0>] (vfree) from [<80558a28>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:849bbc00 r7:00000000 r6:83018400 r5:00001000 r4:7f216000 [<805589f8>] (execmem_free) from [<803c5f48>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:ea42f000 [<803c5f38>] (bpf_jit_free_exec) from [<803c6328>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f38>] (bpf_jit_free_exec) from [<803c6328>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62c0>] (bpf_jit_free) from [<803c73d0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85f8878c r4:86895e00 [<803c7290>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:85f8878c r4:86895e00 [<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 r9:849bbc00 r8:86895e2c r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:86895e00 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:86895e00 r8:80278fec r7:e415de60 r6:86895300 r5:849bbc00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xe4149fb0 to 0xe4149ff8) 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 r4:84d88380 INFO: task kworker/0:18:17269 is blocked on a mutex likely owned by task kworker/0:0:19928. task:kworker/0:0 state:R running task stack:0 pid:19928 tgid:19928 ppid:2 task_flags:0x4208060 flags:0x00000000 Workqueue: events bpf_prog_free_deferred Call trace: [<81a63614>] (__schedule) from [<81a649dc>] (preempt_schedule_irq+0x40/0xa8 kernel/sched/core.c:7256) r10:8280c9b4 r9:86eabc00 r8:80200c04 r7:e417dd54 r6:ffffffff r5:86eabc00 r4:00000000 [<81a6499c>] (preempt_schedule_irq) from [<80200c24>] (svc_preempt+0x8/0x18) Exception stack(0xe417dd20 to 0xe417dd68) dd20: e0509000 ea813000 00000001 80239bf8 7f009000 00000001 82acb1c4 82aca5a0 dd40: 7f009000 ea813000 8280c9b4 e417dd9c e417dda0 e417dd70 80230af0 80239c10 dd60: 80000113 ffffffff r5:80000113 r4:80239c10 [<80230a8c>] (flush_tlb_kernel_range) from [<804e9d20>] (__purge_vmap_area_lazy+0x284/0x458 mm/vmalloc.c:2342) r4:82acb1e4 [<804e9a9c>] (__purge_vmap_area_lazy) from [<804ea0d8>] (_vm_unmap_aliases+0x1e4/0x240 mm/vmalloc.c:2957) r10:00000000 r9:00000000 r8:00000000 r7:ffffffff r6:e417ddc0 r5:e417de08 r4:e417ddc0 [<804e9ef4>] (_vm_unmap_aliases) from [<804edd3c>] (vm_reset_perms mm/vmalloc.c:3349 [inline]) [<804e9ef4>] (_vm_unmap_aliases) from [<804edd3c>] (vfree+0x16c/0x210 mm/vmalloc.c:3428) r10:83016170 r9:00000001 r8:00000000 r7:ffffffff r6:00000000 r5:85853740 r4:00000000 [<804edbd0>] (vfree) from [<80558a28>] (execmem_free+0x30/0x50 mm/execmem.c:503) r9:83018405 r8:86eabc00 r7:00000000 r6:83018400 r5:00001000 r4:7f218000 [<805589f8>] (execmem_free) from [<803c5f48>] (bpf_jit_free_exec+0x10/0x14 kernel/bpf/core.c:1052) r5:00001000 r4:ea435000 [<803c5f38>] (bpf_jit_free_exec) from [<803c6328>] (bpf_jit_binary_free kernel/bpf/core.c:1098 [inline]) [<803c5f38>] (bpf_jit_free_exec) from [<803c6328>] (bpf_jit_free+0x68/0xe4 kernel/bpf/core.c:1221) [<803c62c0>] (bpf_jit_free) from [<803c73d0>] (bpf_prog_free_deferred+0x140/0x158 kernel/bpf/core.c:2898) r5:85626b8c r4:85746d00 [<803c7290>] (bpf_prog_free_deferred) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r7:dddcfd80 r6:83018400 r5:85626b8c r4:85746d00 [<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 r9:86eabc00 r8:85746d2c r7:82804d40 r6:dddcfd80 r5:dddcfda0 r4:85746d00 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85746d00 r8:80278fec r7:e414de60 r6:85e4ff00 r5:86eabc00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xe417dfb0 to 0xe417dff8) 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 r4:85538000 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 r4:82252544 [<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 [<81a4d22c>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81a4d0cc>] (nmi_cpu_backtrace) from [<81a4d378>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000001 r6:8280c690 r5:8281ae34 r4:ffffffff [<81a4d248>] (nmi_trigger_cpumask_backtrace) from [<802304fc>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:852) r9:8281ba28 r8:8280c810 r7:0006efe6 r6:00007f26 r5:82abf7d4 r4:8496a00c [<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 r7:8332a300 r6:8332a300 r5:8321e000 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 r4:832c0b80 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 14110 Comm: kworker/u8:35 Not tainted syzkaller #0 PREEMPT Hardware name: ARM-Versatile Express Workqueue: events_unbound nsim_dev_trap_report_work PC is at preempt_count_sub+0x0/0xfc kernel/sched/core.c:5816 LR is at __local_bh_enable_ip+0x50/0xd0 kernel/softirq.c:453 pc : [<8028d908>] lr : [<8025c484>] psr: 20000113 sp : df801950 ip : df801968 fp : df801964 r10: 81e70d80 r9 : 00000000 r8 : 858ba600 r7 : 826c2680 r6 : 86a2f800 r5 : 00000103 r4 : 85658c00 r3 : 00000100 r2 : 5b70d000 r1 : 00000200 r0 : 00000001 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 858d7880 DAC: fffffffd Call trace: frame pointer underflow [<8025c434>] (__local_bh_enable_ip) from [<818b4e4c>] (local_bh_enable include/linux/bottom_half.h:33 [inline]) [<8025c434>] (__local_bh_enable_ip) from [<818b4e4c>] (ip6t_do_table+0x48c/0x8b8 net/ipv6/netfilter/ip6_tables.c:375) r5:00000001 r4:86a2f9e0 [<818b49c0>] (ip6t_do_table) from [<816afbd0>] (nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]) [<818b49c0>] (ip6t_do_table) from [<816afbd0>] (nf_hook_slow+0x40/0x104 net/netfilter/core.c:623) r10:84eabc00 r9:832adab8 r8:df801a6c r7:858ba600 r6:832ada80 r5:00000007 r4:00000001 [<816afb90>] (nf_hook_slow) from [<818cf158>] (nf_hook include/linux/netfilter.h:273 [inline]) [<816afb90>] (nf_hook_slow) from [<818cf158>] (__ip6_local_out+0xf0/0x160 net/ipv6/output_core.c:145) r9:85e577a8 r8:85e57798 r7:85df6000 r6:00000000 r5:84eabc00 r4:858ba600 [<818cf068>] (__ip6_local_out) from [<818cf1e4>] (ip6_local_out+0x1c/0x44 net/ipv6/output_core.c:155) r7:00000000 r6:00000000 r5:84eabc00 r4:858ba600 [<818cf1c8>] (ip6_local_out) from [<816e4cd8>] (synproxy_send_tcp_ipv6+0x1f0/0x24c net/netfilter/nf_synproxy_core.c:851) r7:00000000 r6:86cdfb00 r5:8499c9c0 r4:858ba600 [<816e4ae8>] (synproxy_send_tcp_ipv6) from [<816e572c>] (synproxy_send_client_synack_ipv6+0x190/0x1e8 net/netfilter/nf_synproxy_core.c:897) r10:85e577a8 r9:85e56100 r8:85e56128 r7:df801bd0 r6:858ba540 r5:00000014 r4:858ba600 [<816e559c>] (synproxy_send_client_synack_ipv6) from [<81720fa8>] (nft_synproxy_eval_v6 net/netfilter/nft_synproxy.c:90 [inline]) [<816e559c>] (synproxy_send_client_synack_ipv6) from [<81720fa8>] (nft_synproxy_do_eval+0x29c/0x2b4 net/netfilter/nft_synproxy.c:145) r10:81e63408 r9:85e56128 r8:85b1a140 r7:86e50098 r6:df801c9c r5:84eabc00 r4:858ba540 [<81720d0c>] (nft_synproxy_do_eval) from [<81720fec>] (nft_synproxy_eval+0x14/0x18 net/netfilter/nft_synproxy.c:247) r9:df801d34 r8:81e63590 r7:81e632f4 r6:81e632b0 r5:86e500a0 r4:86e50090 [<81720fd8>] (nft_synproxy_eval) from [<816e85bc>] (expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]) [<81720fd8>] (nft_synproxy_eval) from [<816e85bc>] (nft_do_chain+0x12c/0x570 net/netfilter/nf_tables_core.c:285) [<816e8490>] (nft_do_chain) from [<817024c0>] (nft_do_chain_inet+0xac/0x120 net/netfilter/nft_chain_filter.c:161) r10:dddd0ec8 r9:832ad4a0 r8:df801d8c r7:858ba540 r6:832ad480 r5:00000004 r4:84226280 [<81702414>] (nft_do_chain_inet) from [<816afbd0>] (nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]) [<81702414>] (nft_do_chain_inet) from [<816afbd0>] (nf_hook_slow+0x40/0x104 net/netfilter/core.c:623) r4:00000001 [<816afb90>] (nf_hook_slow) from [<81849ee4>] (nf_hook include/linux/netfilter.h:273 [inline]) [<816afb90>] (nf_hook_slow) from [<81849ee4>] (NF_HOOK include/linux/netfilter.h:316 [inline]) [<816afb90>] (nf_hook_slow) from [<81849ee4>] (ip6_input+0xb8/0xd8 net/ipv6/ip6_input.c:500) r9:00000040 r8:00000013 r7:00000000 r6:84eabc00 r5:85df6000 r4:858ba540 [<81849e2c>] (ip6_input) from [<81849338>] (dst_input include/net/dst.h:474 [inline]) [<81849e2c>] (ip6_input) from [<81849338>] (ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline]) [<81849e2c>] (ip6_input) from [<81849338>] (NF_HOOK include/linux/netfilter.h:318 [inline]) [<81849e2c>] (ip6_input) from [<81849338>] (NF_HOOK include/linux/netfilter.h:312 [inline]) [<81849e2c>] (ip6_input) from [<81849338>] (ipv6_rcv+0x150/0x15c net/ipv6/ip6_input.c:311) r6:84eabc00 r5:858ba540 r4:00000001 [<818491e8>] (ipv6_rcv) from [<8158f690>] (__netif_receive_skb_one_core+0x5c/0x80 net/core/dev.c:6079) r6:00000000 r5:818491e8 r4:85df6000 [<8158f634>] (__netif_receive_skb_one_core) from [<8158f6fc>] (__netif_receive_skb+0x18/0x5c net/core/dev.c:6192) r5:dddd0fb0 r4:858ba540 [<8158f6e4>] (__netif_receive_skb) from [<8158fa04>] (process_backlog+0xa0/0x17c net/core/dev.c:6544) r5:dddd0fb0 r4:858ba540 [<8158f964>] (process_backlog) from [<81590264>] (__napi_poll+0x34/0x240 net/core/dev.c:7594) r10:00000000 r9:df801ed8 r8:00000000 r7:df801ed3 r6:00000040 r5:dddd0fb0 r4:00000001 [<81590230>] (__napi_poll) from [<81590abc>] (napi_poll net/core/dev.c:7657 [inline]) [<81590230>] (__napi_poll) from [<81590abc>] (net_rx_action+0x358/0x3ec net/core/dev.c:7784) r9:df801ed8 r8:00000000 r7:0000012c r6:5b70d000 r5:dddd0fb0 r4:ffffffff [<81590764>] (net_rx_action) from [<8025be24>] (handle_softirqs+0x140/0x458 kernel/softirq.c:622) r10:85658c00 r9:82804d40 r8:00000102 r7:00000003 r6:00000008 r5:00000004 r4:8280408c [<8025bce4>] (handle_softirqs) from [<802012f0>] (__do_softirq+0x14/0x18 kernel/softirq.c:656) r10:84b84d00 r9:84fe3c00 r8:84b84e00 r7:00000060 r6:81d96008 r5:00000002 r4:60000113 [<802012dc>] (__do_softirq) from [<8022858c>] (____do_softirq+0x10/0x14 arch/arm/kernel/irq.c:77) [<8022857c>] (____do_softirq) from [<81a302f4>] (call_with_stack+0x1c/0x20 arch/arm/lib/call_with_stack.S:40) [<81a302d8>] (call_with_stack) from [<802285c8>] (do_softirq_own_stack+0x38/0x3c arch/arm/kernel/irq.c:82) [<80228590>] (do_softirq_own_stack) from [<8025c42c>] (do_softirq kernel/softirq.c:523 [inline]) [<80228590>] (do_softirq_own_stack) from [<8025c42c>] (do_softirq+0x5c/0x64 kernel/softirq.c:510) [<8025c3d0>] (do_softirq) from [<8025c500>] (__local_bh_enable_ip+0xcc/0xd0 kernel/softirq.c:450) r5:00000002 r4:85658c00 [<8025c434>] (__local_bh_enable_ip) from [<81a6d330>] (__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]) [<8025c434>] (__local_bh_enable_ip) from [<81a6d330>] (_raw_spin_unlock_bh+0x34/0x38 kernel/locking/spinlock.c:210) r5:84fe3be0 r4:858ba0c0 [<81a6d2fc>] (_raw_spin_unlock_bh) from [<80e606dc>] (spin_unlock_bh include/linux/spinlock.h:396 [inline]) [<81a6d2fc>] (_raw_spin_unlock_bh) from [<80e606dc>] (nsim_dev_trap_report drivers/net/netdevsim/dev.c:835 [inline]) [<81a6d2fc>] (_raw_spin_unlock_bh) from [<80e606dc>] (nsim_dev_trap_report_work+0x2e4/0x410 drivers/net/netdevsim/dev.c:866) [<80e603f8>] (nsim_dev_trap_report_work) from [<802785a0>] (process_one_work+0x1b4/0x4f4 kernel/workqueue.c:3263) r10:8300e870 r9:83019805 r8:85658c00 r7:8300e600 r6:83019800 r5:84fe3c00 r4:85c8d980 [<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 r9:85658c00 r8:85c8d9ac r7:82804d40 r6:8300e600 r5:8300e620 r4:85c8d980 [<80278fec>] (worker_thread) from [<8028020c>] (kthread+0x12c/0x280 kernel/kthread.c:463) r10:00000000 r9:85c8d980 r8:80278fec r7:dfa41e60 r6:86c0c180 r5:85658c00 r4:00000001 [<802800e0>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137) Exception stack(0xdf9e1fb0 to 0xdf9e1ff8) 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 r4:859e3100