On Fri, Aug 23, 2024 at 10:43:11AM GMT, Bert Karwatzki wrote:
[snip]
> > @@ -731,21 +708,31 @@ static void vms_complete_munmap_vmas(struct vma_munmap_struct *vms,
> > if (vms->unlock)
> > mmap_write_downgrade(mm);
> >
> > - prev = vma_iter_prev_range(vms->vmi);
> > - next = vma_next(vms->vmi);
> > - if (next)
> > - vma_iter_prev_range(vms->vmi);
> > -
> > /*
> > * We can free page tables without write-locking mmap_lock because VMAs
> > * were isolated before we downgraded mmap_lock.
> > */
> > mas_set(mas_detach, 1);
> > - unmap_region(mm, mas_detach, vms->vma, prev, next, vms->start, vms->end,
> > - vms->vma_count, !vms->unlock);
> > - /* Statistics and freeing VMAs */
> > + unmap_region(mm, mas_detach, vms->vma, vms->prev, vms->next,
> > + vms->start, vms->end, vms->vma_count, !vms->unlock);
> > + /* Update high watermark before we lower total_vm */
> > + update_hiwater_vm(mm);
> > + /* Stat accounting */
> > + WRITE_ONCE(mm->total_vm, READ_ONCE(mm->total_vm) - vms->nr_pages);
> > + mm->exec_vm -= vms->exec_vm;
> > + mm->stack_vm -= vms->stack_vm;
> > + mm->data_vm -= vms->data_vm;
> > + /* Paranoid bookkeeping */
> > + VM_WARN_ON(vms->exec_vm > mm->exec_vm);
> > + VM_WARN_ON(vms->stack_vm > mm->stack_vm);
> > + VM_WARN_ON(vms->data_vm > mm->data_vm);
> > +
>
> I'm running the v7 Patchset on linux-next-20240822 and I get lots of these
> errors (right on boot) (both when using the complete patchset and when using
> only the patches up to this):
Hm curious, I'm running this in qemu with CONFIG_DEBUG_VM set and don't see
this at lesat on next-20240823.
Liam's series is based on the mseal series by Pedro, not sure if that wasn't in
22 somehow?
Can you try with 23, from tip and:
b4 shazam 20240822192543.3359552-1-Liam.Howlett@xxxxxxxxxx
To grab this series just to be sure?
Because that'd definitely be very weird + concerning and something we hadn't
seen before (I don't think?) for the mm->data_vm to be incorrect...
>
> [ T620] WARNING: CPU: 6 PID: 620 at mm/vma.c:725
> vms_complete_munmap_vmas+0x1d8/0x200
> [ T620] Modules linked in: amd_atl ecc mc sparse_keymap wmi_bmof edac_mce_amd
> snd snd_pci_acp3x k10temp soundcore ccp battery ac button hid_sensor_gyro_3d
> hid_sensor_als hid_sensor_magn_3d hid_sensor_prox hid_sensor_accel_3d
> hid_sensor_trigger industrialio_triggered_buffer kfifo_buf industrialio amd_pmc
> hid_sensor_iio_common joydev evdev serio_raw mt7921e mt7921_common mt792x_lib
> mt76_connac_lib mt76 mac80211 libarc4 cfg80211 rfkill msr nvme_fabrics fuse
> efi_pstore configfs efivarfs autofs4 ext4 crc32c_generic mbcache jbd2 usbhid
> amdgpu i2c_algo_bit drm_ttm_helper ttm drm_exec drm_suballoc_helper amdxcp
> xhci_pci drm_buddy hid_sensor_hub xhci_hcd nvme mfd_core gpu_sched
> hid_multitouch hid_generic crc32c_intel psmouse usbcore i2c_piix4
> drm_display_helper amd_sfh i2c_hid_acpi i2c_smbus usb_common crc16 nvme_core
> r8169 i2c_hid hid i2c_designware_platform i2c_designware_core
> [ T620] CPU: 6 UID: 0 PID: 620 Comm: fsck.vfat Not tainted 6.11.0-rc4-next-
> 20240822-liamh-v7-00021-gc6686c81601f #322
> [ T620] Hardware name: Micro-Star International Co., Ltd. Alpha 15 B5EEK/MS-
> 158L, BIOS E158LAMS.107 11/10/2021
> [ T620] RIP: 0010:vms_complete_munmap_vmas+0x1d8/0x200
> [ T620] Code: 8b 85 a8 00 00 00 a8 01 74 35 8b 85 e0 00 00 00 48 8d bd a8 00 00
> 00 83 c0 01 89 85 e0 00 00 00 e8 7d 39 e8 ff e9 63 fe ff ff <0f> 0b e9 eb fe ff
> ff 0f 0b e9 d0 fe ff ff 0f 0b e9 d3 fe ff ff 0f
> [ T620] RSP: 0018:ffffa415c09d7d10 EFLAGS: 00010283
> [ T620] RAX: 00000000000000cd RBX: ffffa415c09d7d90 RCX: 000000000000018e
> [ T620] RDX: 0000000000000021 RSI: 00000000000019d9 RDI: ffff9073ee7a6400
> [ T620] RBP: ffff906541341f80 R08: 0000000000000000 R09: 000000000000080a
> [ T620] R10: 000000000001d4de R11: 0000000000000140 R12: ffffa415c09d7d48
> [ T620] R13: 00007fbd5ea5f000 R14: 00007fbd5eb5efff R15: ffffa415c09d7d90
> [ T620] FS: 00007fbd5ec38740(0000) GS:ffff9073ee780000(0000)
> knlGS:0000000000000000
> [ T620] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ T620] CR2: 00007fc336339c90 CR3: 000000010a39e000 CR4: 0000000000750ef0
> [ T620] PKRU: 55555554
> [ T620] Call Trace:
> [ T620] <TASK>
> [ T620] ? __warn.cold+0x90/0x9e
> [ T620] ? vms_complete_munmap_vmas+0x1d8/0x200
> [ T620] ? report_bug+0xfa/0x140
> [ T620] ? handle_bug+0x53/0x90
> [ T620] ? exc_invalid_op+0x17/0x70
> [ T620] ? asm_exc_invalid_op+0x1a/0x20
> [ T620] ? vms_complete_munmap_vmas+0x1d8/0x200
> [ T620] do_vmi_align_munmap+0x1e0/0x260
> [ T620] do_vmi_munmap+0xbe/0x160
> [ T620] __vm_munmap+0x96/0x110
> [ T620] __x64_sys_munmap+0x16/0x20
> [ T620] do_syscall_64+0x5f/0x170
> [ T620] entry_SYSCALL_64_after_hwframe+0x55/0x5d
> [ T620] RIP: 0033:0x7fbd5ed3ec57
> [ T620] Code: 73 01 c3 48 8b 0d c1 71 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e
> 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff
> 73 01 c3 48 8b 0d 91 71 0d 00 f7 d8 64 89 01 48
> [ T620] RSP: 002b:00007fff0b04d298 EFLAGS: 00000202 ORIG_RAX: 000000000000000b
> [ T620] RAX: ffffffffffffffda RBX: ffffffffffffff88 RCX: 00007fbd5ed3ec57
> [ T620] RDX: 0000000000000000 RSI: 0000000000100000 RDI: 00007fbd5ea5f000
> [ T620] RBP: 0000000000000002 R08: 0000000000100000 R09: 0000000000000007
> [ T620] R10: 0000000000000007 R11: 0000000000000202 R12: 00007fff0b04d588
> [ T620] R13: 000055b76c789fc6 R14: 00007fff0b04d360 R15: 00007fff0b04d3c0
> [ T620] </TASK>
> [ T620] ---[ end trace 0000000000000000 ]---
>
>
> Bert Karwatzki
