Opened 5 years ago

Closed 4 years ago

Last modified 4 years ago

#13968 closed defect (no_response)

ext4: Unknown symbol crc16 (err 0) - back in r35298

Reported by: anonymous Owned by: developers
Priority: response-needed Milestone: Barrier Breaker 14.07
Component: kernel Version: Attitude Adjustment 12.09
Keywords: crc16 usb Cc:


Mounting ext2, ext3, ext4 fs on a usb-stick failed:
"mount: mounting /dev/sda1 on /mnt/qqq failed: No such device"
--> no dmesg error or output
Trying /etc/config/fstab
"config mount
option target /mnt/qqq
option device /dev/sda1
option fstype ext4
option options rw,sync
option enabled 1
option enabled_fsck 0"
--> dmesg: "ext4: Unknown symbol crc16 (err 0)"

Using: "ATTITUDE ADJUSTMENT (Attitude Adjustment, r35298)"

I've seen patch # 6949 ([PATCH] block-extroot and ext4 fs).
May I use this patch?

Thanks for help und best regards,

Attachments (0)

Change History (8)

comment:1 Changed 5 years ago by nbd

  • Priority changed from normal to response-needed

What target/device are you using?

comment:2 Changed 5 years ago by fb866083@…

TP-Link WR842ND
btw, FAT USB sticks work fine.
Thanx, Falk

comment:3 Changed 4 years ago by nbd

Did you mix a custom build with packages from Was this your own build or did you download a release binary?

comment:4 Changed 4 years ago by nbd

  • Resolution set to no_response
  • Status changed from new to closed

comment:5 Changed 4 years ago by huafu.gandon@…

I have the same problem, after installing kmod-fs-ext4 it is trying to load the kernel module and fails with

root@Huafu-tuk-tuk:~# opkg install kmod-fs-ext4
Installing kmod-fs-ext4 (3.10.32-1) to root...
Installing kmod-lib-crc16 (3.10.32-1) to root...
Installing kmod-crypto-hash (3.10.32-1) to root...
Configuring kmod-crypto-hash.
Configuring kmod-lib-crc16.
Configuring kmod-fs-ext4.
kmod: failed to insert /lib/modules/3.10.32/ext4.ko
root@Huafu-tuk-tuk:~# free
             total         used         free       shared      buffers
Mem:         28908        22996         5912            0         1564
-/+ buffers:              21432         7476
Swap:            0            0            0

dmesg shows only one related line:

[ 2213.850000] ext4: Unknown symbol crc16 (err 0)

I am with a downloaded binary update (original install from a downloaded binary install, nothing built myself):

BusyBox v1.19.4 (2014-03-06 03:56:00 MST) built-in shell (ash)
Enter 'help' for a list of built-in commands.

  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 BARRIER BREAKER (Bleeding Edge, r39782)
  * 1/2 oz Galliano         Pour all ingredients into
  * 4 oz cold Coffee        an irish coffee mug filled
  * 1 1/2 oz Dark Rum       with crushed ice. Stir.
  * 2 tsp. Creme de Cacao

comment:6 follow-up: Changed 4 years ago by jow

Reboot and it should work properly.

comment:7 in reply to: ↑ 6 Changed 4 years ago by huafu.gandon@…

Replying to jow:

Reboot and it should work properly.

Yes well I just realized that doing "insmod crc16" does the trick without rebooting, thank you very much

comment:8 Changed 4 years ago by jow

  • Milestone changed from Attitude Adjustment 12.09 to Barrier Breaker 14.07

Milestone Attitude Adjustment 12.09 deleted

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