INFO: rcu detected stall in vms_clear_ptes

Status: auto-obsoleted due to no activity on 2025/04/26 16:36
Subsystems: mm
[Documentation on labels]
First crash: 646d, last: 590d
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in vms_clear_ptes (3) mm 1 4 238d 305d 0/29 auto-obsoleted due to no activity on 2026/04/14 05:45
upstream INFO: rcu detected stall in vms_clear_ptes (2) mm 1 1 397d 397d 0/29 auto-obsoleted due to no activity on 2025/11/05 10:01

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (3 ticks this GP) idle=d5cc/1/0x4000000000000000 softirq=52911/52912 fqs=50
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P13849/3:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=41453, q=149 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 13851 Comm: syz.4.2550 Not tainted 6.13.0-syzkaller-07632-gaa22f4da2a46 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:124 [inline]
RIP: 0010:lock_is_held_type+0x57/0x150 kernel/locking/lockdep.c:5919
Code: 85 c0 0f 85 ce 00 00 00 65 4c 8b 25 13 75 ae 74 41 8b 94 24 dc 0a 00 00 85 d2 0f 85 b6 00 00 00 48 89 fd 41 89 f6 9c 8f 04 24 <fa> 48 c7 c7 00 dd 6c 8b 45 31 ff e8 09 17 00 00 4d 8d ac 24 e0 0a
RSP: 0018:ffffc90000a18d40 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff88805aced300
RBP: ffff88805aced300 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88804111a440
R13: 00000000ffffffff R14: 00000000ffffffff R15: ffff888034bf6000
FS:  00007f23de69a6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2e0c09 CR3: 0000000036ff6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_is_held include/linux/lockdep.h:249 [inline]
 advance_sched+0x707/0xc60 net/sched/sch_taprio.c:929
 __run_hrtimer kernel/time/hrtimer.c:1738 [inline]
 __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1802
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1864
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:_compound_head include/linux/page-flags.h:244 [inline]
RIP: 0010:free_pages_and_swap_cache+0x21b/0x510 mm/swap_state.c:323
Code: 0f 85 6d 02 00 00 4d 8b 75 00 4c 89 f5 48 83 e5 fc 48 8d 7d 08 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 b0 02 00 00 48 8b 45 08 <31> ff 49 89 c7 48 89 44 24 10 41 83 e7 01 4c 89 fe e8 cf de a5 ff
RSP: 0018:ffffc9000e1a7158 EFLAGS: 00000246
RAX: ffffea0001415dc8 RBX: dffffc0000000000 RCX: ffff888022bdc010
RDX: 0000000000080000 RSI: ffffffff8213d3bb RDI: ffffea0001500c88
RBP: ffffea0001500c80 R08: 0000000000000004 R09: 00000000000001f9
R10: 0000000000000029 R11: 0000000000000001 R12: 0000000000000029
R13: ffff888022bdc158 R14: ffffea0001500c80 R15: 00000000000001f9
 __tlb_batch_free_encoded_pages+0xf9/0x290 mm/mmu_gather.c:136
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
 tlb_flush_mmu+0xe9/0x590 mm/mmu_gather.c:373
 zap_pte_range mm/memory.c:1715 [inline]
 zap_pmd_range mm/memory.c:1754 [inline]
 zap_pud_range mm/memory.c:1783 [inline]
 zap_p4d_range mm/memory.c:1804 [inline]
 unmap_page_range+0x1c82/0x3d60 mm/memory.c:1825
 unmap_single_vma+0x194/0x2b0 mm/memory.c:1871
 unmap_vmas+0x22f/0x490 mm/memory.c:1915
 vms_clear_ptes+0x426/0x780 mm/vma.c:1136
 vms_clean_up_area mm/vma.c:1155 [inline]
 __mmap_prepare mm/vma.c:2278 [inline]
 __mmap_region+0x4e2/0x2760 mm/vma.c:2443
 mmap_region+0x127/0x320 mm/mmap.c:1352
 do_mmap+0xa09/0x1050 mm/mmap.c:500
 vm_mmap_pgoff+0x203/0x3a0 mm/util.c:575
 ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:546
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f23dd78cd29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f23de69a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f23dd9a6080 RCX: 00007f23dd78cd29
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f23dd80e2a0 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f23dd9a6080 R15: 00007ffdbfad53d8
 </TASK>
task:syz.3.2552      state:R  running task     stack:25984 pid:13849 tgid:13848 ppid:5817   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x1142/0x5b60 kernel/sched/core.c:6764
 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6943
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 filemap_map_pages+0xe4e/0x16b0 mm/filemap.c:3766
 do_fault_around mm/memory.c:5281 [inline]
 do_read_fault mm/memory.c:5314 [inline]
 do_fault mm/memory.c:5457 [inline]
 do_pte_missing+0xda6/0x3e00 mm/memory.c:3980
 handle_pte_fault mm/memory.c:5820 [inline]
 __handle_mm_fault+0x1166/0x2c60 mm/memory.c:5963
 handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6131
 faultin_page mm/gup.c:1196 [inline]
 __get_user_pages+0x8d9/0x3b50 mm/gup.c:1494
 populate_vma_page_range+0x27f/0x3a0 mm/gup.c:1932
 __mm_populate+0x1d6/0x380 mm/gup.c:2035
 mm_populate include/linux/mm.h:3397 [inline]
 vm_mmap_pgoff+0x2d3/0x3a0 mm/util.c:580
 ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:546
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd8acd8cd29
RSP: 002b:00007fd8aabf6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fd8acfa5fa0 RCX: 00007fd8acd8cd29
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007fd8ace0e2a0 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd8acfa5fa0 R15: 00007ffccb5fb718
 </TASK>
rcu: rcu_preempt kthread starved for 10402 jiffies! g41453 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:R  running task     stack:28376 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x1142/0x5b60 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6856
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2226
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-syzkaller-07632-gaa22f4da2a46 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 05 b8 49 ae 74 48 8b 00 a8 08 75 0c 66 90 0f 00 2d e8 ff 88 00 fb f4 <fa> c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8de07d70 EFLAGS: 00000246
RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8b557239
RDX: 0000000000000001 RSI: ffff888021688800 RDI: ffff888021688864
RBP: ffff888021688864 R08: 0000000000000001 R09: ffffed10170c6f7d
R10: ffff8880b8637beb R11: 0000000000000000 R12: ffff888021710000
R13: ffffffff8ee2f340 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30a1eff8 CR3: 0000000078770000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:699
 cpuidle_enter_state+0xaa/0x4f0 drivers/cpuidle/cpuidle.c:268
 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:389
 cpuidle_idle_call kernel/sched/idle.c:230 [inline]
 do_idle+0x310/0x3f0 kernel/sched/idle.c:325
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:423
 rest_init+0x16b/0x2b0 init/main.c:747
 start_kernel+0x3e9/0x4d0 init/main.c:1103
 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:515
 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:496
 common_startup_64+0x13e/0x148
 </TASK>

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/26 16:34 upstream aa22f4da2a46 9fbd772e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: rcu detected stall in vms_clear_ptes
2025/01/01 12:16 net-next 9268abe611b0 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in vms_clear_ptes
2024/12/01 22:24 linux-next f486c8aa16b8 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: rcu detected stall in vms_clear_ptes
* Struck through repros no longer work on HEAD.