Ubuntu
linux-signed package

dmcrypt+btrfs Out of bounds

Bug #2022901 reported by adam furtenbach
6
This bug affects 1 person
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Bug Description

Getting this IO error when using btrfs + dmcrypt (5 times so far, reformat between each try) on a DDR5 system w/ built in ECC.

[82228.951950] Buffer I/O error on dev sda1, logical block 35156653829, async page read

35156653829*512=18000206760448

This value 18000206760448 is between /dev/sda1 partition size and /dev/mapper/ARCHIVE(btrfs volume) size, but is still slightly out of bounds of btrfs partition geometry, causing an out of bounds error.

# lsblk -b

sda 8:0 0 18000207937536 0 disk
└─sda1 8:1 0 18000206872064 0 part
  └─ARCHIVE 253:1 0 18000190094848 0 crypt /mnt/archive

# btrfs filesystem show --raw
         devid 1 size 18000190091264 used 416628604928 path /dev/mapper/ARCHIVE

Linux oblivion 6.2.0-20-generic #20-Ubuntu SMP PREEMPT_DYNAMIC Thu Apr 6 07:48:48 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 23.04
Release: 23.04
Codename: lunar

Revision history for this message
adam furtenbach (zmoosh) wrote :

System has been running stable for the entire time when not using dmcrypt on that disk.
dmcrypt+btrfs has been working perfectly on OS disk since the beginning.

> lsblk
nvme0n1 259:0 0 2000398934016 0 disk
├─nvme0n1p1 259:1 0 805306368 0 part
│ └─LUKS_BOOT 253:1 0 803209216 0 crypt /boot
├─nvme0n1p2 259:2 0 134217728 0 part /boot/efi
├─nvme0n1p3 259:3 0 1099511627776 0 part
│ └─ROOT 253:0 0 1099494850560 0 crypt /home
│ /
...

# CPU model
> cat /proc/cpuinfo | grep "model name" | head -n 1
 model name : AMD Ryzen 9 7950X3D 16-Core Processor

# System running at stock speed
> dmidecode --type 17 | grep Speed: | head -n 1
         Speed: 4800 MT/s

# no issues with scrubbing
> btrfs scrub status /mnt/grid/
 UUID: b1dc5510-5ecc-4bdb-b464-0ac09ffad89f
Scrub started: Sat Jun 10 11:13:39 2023
Status: finished
Duration: 9:03:05
Total to scrub: 6.74TiB
Rate: 209.78MiB/s
Error summary: no errors found

# smart table looks good
> smartctl -A /dev/sda
 smartctl 7.3 2022-02-28 r5338 [x86_64-linux-6.2.0-20-generic] (local build)
Copyright (C) 2002-22, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate 0x000b 100 100 001 Pre-fail Always - 0
  2 Throughput_Performance 0x0005 149 149 054 Pre-fail Offline - 44
  3 Spin_Up_Time 0x0007 084 084 001 Pre-fail Always - 337 (Average 310)
  4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 21
  5 Reallocated_Sector_Ct 0x0033 100 100 001 Pre-fail Always - 0
  7 Seek_Error_Rate 0x000b 100 100 001 Pre-fail Always - 0
  8 Seek_Time_Performance 0x0005 140 140 020 Pre-fail Offline - 15
  9 Power_On_Hours 0x0012 100 100 000 Old_age Always - 267
 10 Spin_Retry_Count 0x0013 100 100 001 Pre-fail Always - 0
 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 15
 22 Helium_Level 0x0023 100 100 025 Pre-fail Always - 100
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 33
193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always - 33
194 Temperature_Celsius 0x0002 059 059 000 Old_age Always - 35 (Min/Max 22/37)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x000a 100 100 000 Old_age Always - 0

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