rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (2 ticks this GP) idle=599/1/0x4000000000000000 softirq=11011/11011 fqs=0 (t=10549 jiffies g=13133 q=2069) rcu: rcu_preempt kthread timer wakeup didn't happen for 10548 jiffies! g13133 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=1 timer-softirq=6888 rcu: rcu_preempt kthread starved for 10549 jiffies! g13133 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:I stack:26776 pid: 15 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5027 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373 schedule+0x11b/0x1f0 kernel/sched/core.c:6456 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 rcu: Stack dump where RCU GP kthread last ran: NMI backtrace for cpu 1 CPU: 1 PID: 5007 Comm: sed Not tainted 5.15.176-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline] rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:487 print_cpu_stall+0x31b/0x600 kernel/rcu/tree_stall.h:631 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline] rcu_pending kernel/rcu/tree.c:3932 [inline] rcu_sched_clock_irq+0x8d9/0x1150 kernel/rcu/tree.c:2619 update_process_times+0x196/0x200 kernel/time/timer.c:1818 tick_sched_handle kernel/time/tick-sched.c:254 [inline] tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline] __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:__sanitizer_cov_trace_cmp8+0x78/0x80 kernel/kcov.c:274 Code: c1 e1 05 48 8d 41 28 4c 39 c8 77 1e 48 c7 44 11 08 06 00 00 00 48 89 7c 11 10 48 89 74 11 18 4c 89 44 11 20 49 ff c2 4c 89 12 0f 1f 80 00 00 00 00 4c 8b 04 24 65 48 8b 15 74 e8 81 7e 65 8b RSP: 0018:ffffc9000345f9e8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 00007f4d641f3000 RCX: ffff888023ff1dc0 RDX: 0000000000000000 RSI: 0000000000000f30 RDI: 00007f4d641f3000 RBP: 00007f4d641f20d0 R08: ffffffff843c764a R09: ffffed10047fe3b9 R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000000001f8 R13: ffff88805cf29438 R14: 00007f4d641f20d0 R15: 0000000000000f30 __chk_range_not_ok arch/x86/include/asm/uaccess.h:33 [inline] clear_user+0x8a/0x150 arch/x86/lib/usercopy_64.c:53 padzero fs/binfmt_elf.c:141 [inline] load_elf_interp+0xcdf/0xe20 fs/binfmt_elf.c:689 load_elf_binary+0x1b7a/0x2750 fs/binfmt_elf.c:1227 search_binary_handler fs/exec.c:1742 [inline] exec_binprm fs/exec.c:1783 [inline] bprm_execve+0x8fd/0x17c0 fs/exec.c:1852 do_execveat_common+0x583/0x720 fs/exec.c:1957 do_execve fs/exec.c:2027 [inline] __do_sys_execve fs/exec.c:2103 [inline] __se_sys_execve fs/exec.c:2098 [inline] __x64_sys_execve+0x8e/0xa0 fs/exec.c:2098 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f72ff80eef7 Code: Unable to access opcode bytes at RIP 0x7f72ff80eecd. RSP: 002b:00007ffc774cde78 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 000055e36be35ec0 RCX: 00007f72ff80eef7 RDX: 000055e36be35f08 RSI: 000055e36be35ec0 RDI: 000055e36be35f98 RBP: 000055e36be35f98 R08: 000055e36be35f9d R09: 00007ffc774d3ea7 R10: 00007f72ffa07088 R11: 0000000000000246 R12: 000055e36be35f08 R13: 00007f72ff9bc904 R14: 000055e36be35f08 R15: 0000000000000000 NMI backtrace for cpu 1 CPU: 1 PID: 5007 Comm: sed Not tainted 5.15.176-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline] rcu_dump_cpu_stacks+0x223/0x390 kernel/rcu/tree_stall.h:349 print_cpu_stall+0x320/0x600 kernel/rcu/tree_stall.h:633 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline] rcu_pending kernel/rcu/tree.c:3932 [inline] rcu_sched_clock_irq+0x8d9/0x1150 kernel/rcu/tree.c:2619 update_process_times+0x196/0x200 kernel/time/timer.c:1818 tick_sched_handle kernel/time/tick-sched.c:254 [inline] tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline] __sysvec_apic_timer_interrupt+0x13b/0x4b0 arch/x86/kernel/apic/apic.c:1114 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:__sanitizer_cov_trace_cmp8+0x78/0x80 kernel/kcov.c:274 Code: c1 e1 05 48 8d 41 28 4c 39 c8 77 1e 48 c7 44 11 08 06 00 00 00 48 89 7c 11 10 48 89 74 11 18 4c 89 44 11 20 49 ff c2 4c 89 12 0f 1f 80 00 00 00 00 4c 8b 04 24 65 48 8b 15 74 e8 81 7e 65 8b RSP: 0018:ffffc9000345f9e8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 00007f4d641f3000 RCX: ffff888023ff1dc0 RDX: 0000000000000000 RSI: 0000000000000f30 RDI: 00007f4d641f3000 RBP: 00007f4d641f20d0 R08: ffffffff843c764a R09: ffffed10047fe3b9 R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000000001f8 R13: ffff88805cf29438 R14: 00007f4d641f20d0 R15: 0000000000000f30 __chk_range_not_ok arch/x86/include/asm/uaccess.h:33 [inline] clear_user+0x8a/0x150 arch/x86/lib/usercopy_64.c:53 padzero fs/binfmt_elf.c:141 [inline] load_elf_interp+0xcdf/0xe20 fs/binfmt_elf.c:689 load_elf_binary+0x1b7a/0x2750 fs/binfmt_elf.c:1227 search_binary_handler fs/exec.c:1742 [inline] exec_binprm fs/exec.c:1783 [inline] bprm_execve+0x8fd/0x17c0 fs/exec.c:1852 do_execveat_common+0x583/0x720 fs/exec.c:1957 do_execve fs/exec.c:2027 [inline] __do_sys_execve fs/exec.c:2103 [inline] __se_sys_execve fs/exec.c:2098 [inline] __x64_sys_execve+0x8e/0xa0 fs/exec.c:2098 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f72ff80eef7 Code: Unable to access opcode bytes at RIP 0x7f72ff80eecd. RSP: 002b:00007ffc774cde78 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 000055e36be35ec0 RCX: 00007f72ff80eef7 RDX: 000055e36be35f08 RSI: 000055e36be35ec0 RDI: 000055e36be35f98 RBP: 000055e36be35f98 R08: 000055e36be35f9d R09: 00007ffc774d3ea7 R10: 00007f72ffa07088 R11: 0000000000000246 R12: 000055e36be35f08 R13: 00007f72ff9bc904 R14: 000055e36be35f08 R15: 0000000000000000