Arch Linux

PROBUBBLE01

Member

Registered: 2021-09-07

Posts: 11

[SOLVED]Boot partition being mounted twice. one as /boot one as /efi

After the latest update, bootctl started complaining about /efi directory being world readable. to fix this, i updated the /boot partition's fstab entry fmask to 0137 and dmask to 0027.

After a reboot, my root partition now has a seperate /efi directory which contains the same files as /boot directory

total 40K
drwxr-xr-x   1 root root  138 Aug  2 19:45 .
drwxr-xr-x   1 root root  138 Aug  2 19:45 ..
lrwxrwxrwx   1 root root    7 Feb  1  2023 bin -> usr/bin
drwxr-xr-x   4 root root 4.0K Jan  1  1970 boot
drwxr-xr-x  20 root root 4.1K Aug  3 22:29 dev
drwxr-xr-x   2 root root    0 Aug  3 22:29 efi
drwxr-xr-x   1 root root 2.7K Aug  3 23:21 etc
drwxr-xr-x   1 root root   14 Jul 12  2022 home
lrwxrwxrwx   1 root root    7 Feb  1  2023 lib -> usr/lib
lrwxrwxrwx   1 root root    7 Feb  1  2023 lib64 -> usr/lib
drwxr-xr-x   1 root root   14 Jun 16 21:27 media
drwxr-xr-x   1 root root    0 Dec 31  2022 mnt
drwxr-xr-x   1 root root   44 Jul 18 20:35 opt
dr-xr-xr-x 352 root root    0 Aug  3 22:29 proc
drwxr-x---   1 root root  230 May 20 16:50 root
drwxr-xr-x  19 root root  500 Aug  3 23:00 run
lrwxrwxrwx   1 root root    7 Feb  1  2023 sbin -> usr/bin
drwxr-xr-x   1 root root   14 Jul 12  2022 srv
dr-xr-xr-x  13 root root    0 Aug  3 22:29 sys
drwxrwxrwt   9 root root  200 Aug  3 23:34 tmp
drwxr-xr-x   1 root root   80 Aug  3 21:35 usr
drwxr-xr-x   1 root root  116 Aug  3 21:57 var

I also checked lsblk, which outputted:

NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
nvme0n1     259:0    0 238.5G  0 disk 
├─nvme0n1p1 259:1    0   300M  0 part /efi
│                                     /boot
├─nvme0n1p2 259:2    0    10G  0 part [SWAP]
└─nvme0n1p3 259:3    0 228.2G  0 part /home
                                      /

Here is my fstab entries:

# Static information about the filesystems.
# See fstab(5) for details.

# <file system> <dir> <type> <options> <dump> <pass>
# /dev/nvme0n1p3
UUID=ed8546ab-0265-466c-9286-8d222f156dc4	/         	btrfs     	rw,noatime,compress=zstd:3,ssd,discard=async,space_cache=v2,subvolid=256,subvol=/@	0 0

# /dev/nvme0n1p1
UUID=9E5B-5175      	/boot     	vfat      	rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,utf8,errors=remount-ro	0 2

# /dev/nvme0n1p3
UUID=ed8546ab-0265-466c-9286-8d222f156dc4	/home     	btrfs     	rw,noatime,compress=zstd:3,ssd,discard=async,space_cache=v2,subvolid=257,subvol=/@home	0 0

# /dev/nvme0n1p2
UUID=3dd8df47-4d3f-4d3c-b59d-225cc5ebab6e	none      	swap      	defaults  	0 0

This issue persists even after reverting the fstab options.

I tried unmounting /efi but right after i check the contents of /efi after unmounting, it gets mounted back.
Why is this happening? i checked dmesg to try and find the culprit, but there is nothing stating that the directory is mounted.
How should i fix it?

Last edited by PROBUBBLE01 (2023-08-04 07:25:18)

just4arch

Member

Registered: 2023-01-07

Posts: 84

Re: [SOLVED]Boot partition being mounted twice. one as /boot one as /efi

Welcome to the wonders of systemd...
It's already been solved in the forums.

tl;dr
stop automount unit and delete /efi

PROBUBBLE01

Member

Registered: 2021-09-07

Posts: 11

Re: [SOLVED]Boot partition being mounted twice. one as /boot one as /efi

Welcome to the wonders of systemd...
It's already been solved in the forums.

tl;dr
stop automount unit and delete /efi

Hey, thanks for replying. I cannot seem to disable those units. systemd complains those units does not have an installation config. also, logs of efi.automount says thats bootctl is triggering it. any ideas?

PROBUBBLE01

Member

Registered: 2021-09-07

Posts: 11

Re: [SOLVED]Boot partition being mounted twice. one as /boot one as /efi

So this is a bug in systemd. And it has been reported on github.
https://github.com/systemd/systemd/issues/28585
So I assume it's not user error. Closing the thread.