INFO: task syz-executor.1:4437 blocked for more than 430 seconds. Not tainted 5.12.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack: 0 pid: 4437 ppid: 4395 flags:0x00000001 Backtrace: [<821370d0>] (__schedule) from [<82137df4>] (schedule+0x5c/0x108 kernel/sched/core.c:5154) r10:88f22c58 r9:88f22c00 r8:82138c38 r7:88a0b314 r6:88a0b310 r5:88f24000 r4:88f1a080 [<82137d98>] (schedule) from [<8213d9c4>] (schedule_timeout+0xe0/0x12c kernel/time/timer.c:1868) r5:88f24000 r4:7fffffff [<8213d8e4>] (schedule_timeout) from [<82138c68>] (do_wait_for_common kernel/sched/completion.c:85 [inline]) [<8213d8e4>] (schedule_timeout) from [<82138c68>] (__wait_for_common kernel/sched/completion.c:106 [inline]) [<8213d8e4>] (schedule_timeout) from [<82138c68>] (wait_for_common kernel/sched/completion.c:117 [inline]) [<8213d8e4>] (schedule_timeout) from [<82138c68>] (wait_for_completion+0xb4/0x124 kernel/sched/completion.c:138) r6:88a0b310 r5:88f24000 r4:7fffffff [<82138bb4>] (wait_for_completion) from [<80559e1c>] (io_sq_thread_finish+0x38/0x234 fs/io_uring.c:7127) r8:88a0b2c4 r7:88f19040 r6:20001480 r5:88a0b000 r4:88f22c00 [<80559de4>] (io_sq_thread_finish) from [<805613c4>] (io_sq_offload_create fs/io_uring.c:7928 [inline]) [<80559de4>] (io_sq_thread_finish) from [<805613c4>] (io_uring_create fs/io_uring.c:9401 [inline]) [<80559de4>] (io_sq_thread_finish) from [<805613c4>] (io_uring_setup+0xba4/0xf4c fs/io_uring.c:9484) r9:88f22c00 r8:88a0b2c4 r7:88f19040 r6:20001480 r5:fffffdff r4:88a0b000 [<80560820>] (io_uring_setup) from [<80568448>] (__do_sys_io_uring_setup fs/io_uring.c:9490 [inline]) [<80560820>] (io_uring_setup) from [<80568448>] (sys_io_uring_setup+0x10/0x14 fs/io_uring.c:9487) r10:000001a9 r9:88f24000 r8:80200224 r7:000001a9 r6:20ffc000 r5:20ffc000 r4:76f59070 [<80568438>] (sys_io_uring_setup) from [<80200060>] (ret_fast_syscall+0x0/0x2c arch/arm/mm/proc-v7.S:64) Exception stack(0x88f25fa8 to 0x88f25ff0) 5fa0: 76f59070 20ffc000 000070fb 20001480 20ffc000 00000004 5fc0: 76f59070 20ffc000 20ffc000 000001a9 20001500 20ffc000 7e8d1914 76f5920c 5fe0: 76f59010 76f59000 000120b8 0004b440 Showing all locks held in the system: 2 locks held by kworker/u4:3/117: 2 locks held by kworker/u4:4/121: 1 lock held by khungtaskd/1524: #0: 8390e91c (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x34/0x1dc kernel/locking/lockdep.c:6329 2 locks held by getty/4308: #0: 86f55054 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x38/0x3c drivers/tty/tty_ldsem.c:340 #1: e85fa290 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x4a4/0x56c drivers/tty/n_tty.c:2178 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1524 Comm: khungtaskd Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<82109d68>] (dump_backtrace) from [<82109fdc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:252) r7:00000000 r6:600f0013 r5:00000000 r4:83966184 [<82109fc4>] (show_stack) from [<82112fb0>] (__dump_stack lib/dump_stack.c:79 [inline]) [<82109fc4>] (show_stack) from [<82112fb0>] (dump_stack+0xb8/0xe8 lib/dump_stack.c:120) [<82112ef8>] (dump_stack) from [<8091d5c0>] (nmi_cpu_backtrace+0xfc/0x160 lib/nmi_backtrace.c:105) r7:00000000 r6:80210934 r5:00000000 r4:00000001 [<8091d4c4>] (nmi_cpu_backtrace) from [<8091d760>] (nmi_trigger_cpumask_backtrace+0x13c/0x224 lib/nmi_backtrace.c:62) r5:83823424 r4:00000001 [<8091d624>] (nmi_trigger_cpumask_backtrace) from [<80211dec>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:857) r9:83822dd8 r8:83806d00 r7:00007f6f r6:83835150 r5:00009f80 r4:83ac77d9 [<80211dd4>] (arch_trigger_cpumask_backtrace) from [<803665bc>] (trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]) [<80211dd4>] (arch_trigger_cpumask_backtrace) from [<803665bc>] (check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]) [<80211dd4>] (arch_trigger_cpumask_backtrace) from [<803665bc>] (watchdog+0x6d0/0x88c kernel/hung_task.c:294) [<80365eec>] (watchdog) from [<80271f40>] (kthread+0x184/0x1a4 kernel/kthread.c:292) r10:84505e2c r9:00000000 r8:80365eec r7:00000000 r6:84782000 r5:8470c1c0 r4:846dad80 [<80271dbc>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:158) Exception stack(0x84783fb0 to 0x84783ff8) 3fa0: 00000000 00000000 00000000 00000000 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80271dbc r4:8470c1c0 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 121 Comm: kworker/u4:4 Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: ARM-Versatile Express Workqueue: bat_events batadv_mcast_mla_update PC is at __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] PC is at _raw_spin_unlock_irq+0x2c/0x60 kernel/locking/spinlock.c:199 LR is at __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:70 pc : [<8213e7a4>] lr : [<82135794>] psr: 20000013 sp : 846d3ec8 ip : 846d3e70 fp : 846d3edc r10: 00000088 r9 : 00000000 r8 : 00000100 r7 : 86e9ce00 r6 : 84420000 r5 : 844f7480 r4 : 84420000 r3 : 005b98e9 r2 : 00000001 r1 : 82aee0b8 r0 : 00000000 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 86e27ac0 DAC: fffffffd CPU: 0 PID: 121 Comm: kworker/u4:4 Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: ARM-Versatile Express Workqueue: bat_events batadv_mcast_mla_update Backtrace: [<82109d68>] (dump_backtrace) from [<82109fdc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:252) r7:00000080 r6:60000193 r5:00000000 r4:83966184 [<82109fc4>] (show_stack) from [<82112fb0>] (__dump_stack lib/dump_stack.c:79 [inline]) [<82109fc4>] (show_stack) from [<82112fb0>] (dump_stack+0xb8/0xe8 lib/dump_stack.c:120) [<82112ef8>] (dump_stack) from [<802096bc>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:191) r7:8440cd80 r6:00000000 r5:846d3e78 r4:00000000 [<802096a8>] (show_regs) from [<8091d5a8>] (nmi_cpu_backtrace+0xe4/0x160 lib/nmi_backtrace.c:103) [<8091d4c4>] (nmi_cpu_backtrace) from [<80210e34>] (do_handle_IPI+0x4c/0x440 arch/arm/kernel/smp.c:672) r5:00000017 r4:00000007 [<80210de8>] (do_handle_IPI) from [<80211248>] (ipi_handler+0x20/0x28 arch/arm/kernel/smp.c:700) r9:846d3e78 r8:846d3de0 r7:8440cd80 r6:8382343c r5:00000017 r4:844a4600 [<80211228>] (ipi_handler) from [<802dfc04>] (handle_percpu_devid_irq+0xa4/0x19c kernel/irq/chip.c:930) [<802dfb60>] (handle_percpu_devid_irq) from [<802d8a30>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]) [<802dfb60>] (handle_percpu_devid_irq) from [<802d8a30>] (generic_handle_irq kernel/irq/irqdesc.c:652 [inline]) [<802dfb60>] (handle_percpu_devid_irq) from [<802d8a30>] (__handle_domain_irq+0xb0/0x120 kernel/irq/irqdesc.c:689) r10:846d3e10 r9:846d3e78 r8:00000001 r7:00000000 r6:836c6498 r5:00000000 r4:836c6498 r3:00010001 [<802d8980>] (__handle_domain_irq) from [<80931ff0>] (handle_domain_irq include/linux/irqdesc.h:176 [inline]) [<802d8980>] (__handle_domain_irq) from [<80931ff0>] (gic_handle_irq+0x84/0xac drivers/irqchip/irq-gic.c:370) r10:00000088 r9:40000193 r8:e000200c r7:836c64bc r6:e0002000 r5:846d3e78 r4:8382343c [<80931f6c>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205) Exception stack(0x846d3e78 to 0x846d3ec0) 3e60: 00000000 82aee0b8 3e80: 00000001 005b98e9 84420000 844f7480 84420000 86e9ce00 00000100 00000000 3ea0: 00000088 846d3edc 846d3e70 846d3ec8 82135794 8213e7a4 20000013 ffffffff r9:846d2000 r8:00000100 r7:846d3eac r6:ffffffff r5:20000013 r4:8213e7a4 [<8213e778>] (_raw_spin_unlock_irq) from [<80269604>] (process_one_work+0x234/0x998 kernel/workqueue.c:2248) r5:844f7480 r4:88c0acd0 [<802693d0>] (process_one_work) from [<80269dcc>] (worker_thread+0x64/0x54c kernel/workqueue.c:2421) r10:00000088 r9:846d2000 r8:83806d00 r7:84420038 r6:844f7494 r5:84420000 r4:844f7480 [<80269d68>] (worker_thread) from [<80271f40>] (kthread+0x184/0x1a4 kernel/kthread.c:292) r10:846d1e64 r9:844f7480 r8:80269d68 r7:00000000 r6:846d2000 r5:84565900 r4:84681700 [<80271dbc>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:158) Exception stack(0x846d3fb0 to 0x846d3ff8) 3fa0: 00000000 00000000 00000000 00000000 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80271dbc r4:84565900