watchdog: BUG: soft lockup - CPU#1 stuck for 369s! [udevd:6562] Modules linked in: irq event stamp: 97834 hardirqs last enabled at (97833): [<80200ad8>] __irq_svc+0x78/0x94 arch/arm/kernel/entry-armv.S:216 hardirqs last disabled at (97834): [<80200aac>] __irq_svc+0x4c/0x94 arch/arm/kernel/entry-armv.S:204 softirqs last enabled at (28458): [<8020167c>] __do_softirq+0x584/0x7ac kernel/softirq.c:372 softirqs last disabled at (28451): [<8024dff4>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (28451): [<8024dff4>] invoke_softirq kernel/softirq.c:228 [inline] softirqs last disabled at (28451): [<8024dff4>] __irq_exit_rcu+0x1d8/0x200 kernel/softirq.c:422 CPU: 1 PID: 6562 Comm: udevd Not tainted 5.12.0-rc3-syzkaller #0 Hardware name: ARM-Versatile Express PC is at csd_lock_wait kernel/smp.c:228 [inline] PC is at smp_call_function_single+0x104/0x288 kernel/smp.c:516 LR is at 0x835b5158 pc : [<8032510c>] lr : [<835b5158>] psr: 20070013 sp : 8736fd18 ip : 00000000 fp : 8736fd5c r10: 00000001 r9 : 00000001 r8 : 00000000 r7 : 8052f588 r6 : 00000000 r5 : 00000000 r4 : 8736fd20 r3 : 00000011 r2 : ddfcdb40 r1 : 8736fd20 r0 : 00000000 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 8724fa80 DAC: 00000000 CPU: 1 PID: 6562 Comm: udevd Not tainted 5.12.0-rc3-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<81802550>] (dump_backtrace) from [<818027c4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:252) r7:00000080 r6:60070193 r5:00000000 r4:82b58344 [<818027ac>] (show_stack) from [<81809e98>] (__dump_stack lib/dump_stack.c:79 [inline]) [<818027ac>] (show_stack) from [<81809e98>] (dump_stack+0xb8/0xe8 lib/dump_stack.c:120) [<81809de0>] (dump_stack) from [<802096bc>] (show_regs+0x14/0x18 arch/arm/kernel/process.c:191) r7:00000171 r6:828a7ac9 r5:82a225f8 r4:8736e000 [<802096a8>] (show_regs) from [<80366760>] (watchdog_timer_fn+0x2b8/0x33c kernel/watchdog.c:418) [<803664a8>] (watchdog_timer_fn) from [<8030807c>] (__run_hrtimer kernel/time/hrtimer.c:1537 [inline]) [<803664a8>] (watchdog_timer_fn) from [<8030807c>] (__hrtimer_run_queues+0x294/0x690 kernel/time/hrtimer.c:1601) r10:803664a8 r9:8736e000 r8:ddfdb3e0 r7:ddfdb380 r6:82a22498 r5:8736e000 r4:ddfdbad0 [<80307de8>] (__hrtimer_run_queues) from [<80308da0>] (hrtimer_interrupt+0x14c/0x2e0 kernel/time/hrtimer.c:1663) r10:ddfdb4d8 r9:ddfdb498 r8:ddfdb458 r7:ddfdb4a0 r6:ddfdb4e0 r5:20070193 r4:ddfdb380 [<80308c54>] (hrtimer_interrupt) from [<8114c308>] (timer_handler drivers/clocksource/arm_arch_timer.c:647 [inline]) [<80308c54>] (hrtimer_interrupt) from [<8114c308>] (arch_timer_handler_virt+0x30/0x38 drivers/clocksource/arm_arch_timer.c:658) r10:8736fc60 r9:8736fcc8 r8:8736fc30 r7:8348d940 r6:82a22c34 r5:0000001c r4:8348b000 [<8114c2d8>] (arch_timer_handler_virt) from [<802df904>] (handle_percpu_devid_irq+0xa4/0x19c kernel/irq/chip.c:930) [<802df860>] (handle_percpu_devid_irq) from [<802d8730>] (generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]) [<802df860>] (handle_percpu_devid_irq) from [<802d8730>] (generic_handle_irq kernel/irq/irqdesc.c:652 [inline]) [<802df860>] (handle_percpu_devid_irq) from [<802d8730>] (__handle_domain_irq+0xb0/0x120 kernel/irq/irqdesc.c:689) r10:8736fc60 r9:8736fcc8 r8:00000001 r7:00000000 r6:828ad498 r5:00000000 r4:828ad498 r3:00010002 [<802d8680>] (__handle_domain_irq) from [<8088af70>] (handle_domain_irq include/linux/irqdesc.h:176 [inline]) [<802d8680>] (__handle_domain_irq) from [<8088af70>] (gic_handle_irq+0x84/0xac drivers/irqchip/irq-gic.c:370) r10:00000001 r9:8736e000 r8:e000200c r7:828ad4bc r6:e0002000 r5:8736fcc8 r4:82a22c34 [<8088aeec>] (gic_handle_irq) from [<80200abc>] (__irq_svc+0x5c/0x94 arch/arm/kernel/entry-armv.S:205) Exception stack(0x8736fcc8 to 0x8736fd10) fcc0: 00000000 8736fd20 ddfcdb40 00000011 8736fd20 00000000 fce0: 00000000 8052f588 00000000 00000001 00000001 8736fd5c 00000000 8736fd18 fd00: 835b5158 8032510c 20070013 ffffffff r9:8736e000 r8:00000000 r7:8736fcfc r6:ffffffff r5:20070013 r4:8032510c [<80325008>] (smp_call_function_single) from [<80325608>] (smp_call_function_many_cond+0x194/0x490 kernel/smp.c:652) r9:82a22498 r8:82a22498 r7:00000000 r6:00000000 r5:82a225bc r4:00000001 [<80325474>] (smp_call_function_many_cond) from [<80325c14>] (on_each_cpu_cond_mask+0x54/0x150 kernel/smp.c:903) r10:5ac3c35a r9:8352d734 r8:82a22498 r7:8052f588 r6:8052dd2c r5:00000000 r4:00000001 [<80325bc0>] (on_each_cpu_cond_mask) from [<80325d30>] (on_each_cpu_cond+0x20/0x28 kernel/smp.c:918) r8:83e3ec24 r7:843cdd00 r6:83e3f180 r5:83e3f008 r4:83e3ec00 [<80325d10>] (on_each_cpu_cond) from [<8052e04c>] (invalidate_bh_lrus+0x28/0x2c fs/buffer.c:1439) [<8052e024>] (invalidate_bh_lrus) from [<80538700>] (kill_bdev fs/block_dev.c:85 [inline]) [<8052e024>] (invalidate_bh_lrus) from [<80538700>] (__blkdev_put+0xe0/0x294 fs/block_dev.c:1581) [<80538620>] (__blkdev_put) from [<80538c3c>] (blkdev_put+0x54/0x194 fs/block_dev.c:1641) r10:5ac3c35a r9:8352d734 r8:83dfce40 r7:843cdd00 r6:83e3ec24 r5:480a005d r4:83e3ec00 [<80538be8>] (blkdev_put) from [<80538da0>] (blkdev_close+0x24/0x2c fs/block_dev.c:1649) r9:8352d734 r8:83dfce40 r7:856ce0d0 r6:480a005d r5:8441bbd8 r4:8671c8c0 [<80538d7c>] (blkdev_close) from [<804dc2e0>] (__fput+0x9c/0x264 fs/file_table.c:280) [<804dc244>] (__fput) from [<804dc524>] (____fput+0x10/0x14 fs/file_table.c:313) r9:8352d734 r8:81f4a770 r7:82c6ba40 r6:8352d140 r5:8352d6e4 r4:00000000 [<804dc514>] (____fput) from [<80270030>] (task_work_run+0xa0/0xdc kernel/task_work.c:140) [<8026ff90>] (task_work_run) from [<8020ce3c>] (tracehook_notify_resume include/linux/tracehook.h:189 [inline]) [<8026ff90>] (task_work_run) from [<8020ce3c>] (do_work_pending+0x520/0x648 arch/arm/kernel/signal.c:672) r9:81f42a14 r8:fffffe30 r7:8736e000 r6:80200224 r5:8736ffb0 r4:ffffe000 [<8020c91c>] (do_work_pending) from [<80200098>] (slow_work_pending+0xc/0x20) Exception stack(0x8736ffb0 to 0x8736fff8) ffa0: 00000000 7ee8ac58 00000003 00000000 ffc0: 76ff587c 76ff5840 00000002 00000006 000563e8 00ec7190 00000008 000563f8 ffe0: 000561f4 7ee8b458 0002d6d0 76cc0380 60070010 00000008 r10:00000006 r9:8736e000 r8:80200224 r7:00000006 r6:00000002 r5:76ff5840 r4:76ff587c Sending NMI from CPU 1 to CPUs 0: