filesystem seems broken

[youyou54]

Hello all,
I have a filesystem issue. Some of my directories cannot be reached, when i do a ls on it, I have a lot of

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ls: Cannot access 'directory name/file in the directory': Permission not granted, 

and also this kind of output for ls:

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total 0
d????????? ? ? ? ?              ? ./
d????????? ? ? ? ?              ? ../
-????????? ? ? ? ?              ? file1.txt
-????????? ? ? ? ?              ? file2.txt

I tried to repair the EXT4 partition by using the disks utilities, but it didn't help, and i have now some strange behavior: the side bar of the file explorer disappeared, and my screenshot dont work if the partition is mounted, it works only if I unmount it in disks ....

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System:    Kernel: 5.8.0-48-generic x86_64 bits: 64 compiler: N/A Desktop: Cinnamon 4.8.6 wm: muffin 4.8.1 dm: LightDM 1.30.0 
           Distro: Linux Mint 20.1 Ulyssa base: Ubuntu 20.04 focal 
Machine:   Type: Desktop Mobo: Micro-Star model: MEG X570 ACE (MS-7C35) v: 1.0 serial: <filter> UEFI: American Megatrends 
           v: 1.C0 date: 10/29/2020 
CPU:       Topology: 12-Core model: AMD Ryzen 9 5900X bits: 64 type: MT MCP arch: Zen 3 L2 cache: 6144 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 177602 
           Speed: 2155 MHz min/max: 2200/3700 MHz boost: enabled Core speeds (MHz): 1: 2145 2: 2152 3: 2196 4: 2195 5: 2142 
           6: 2143 7: 2149 8: 4837 9: 2147 10: 2148 11: 2200 12: 2189 13: 2146 14: 2196 15: 2193 16: 2189 17: 2194 18: 4831 
           19: 2149 20: 2146 21: 2201 22: 2196 23: 2194 24: 2197 
Graphics:  Device-1: NVIDIA GM204 [GeForce GTX 970] vendor: Gigabyte driver: nvidia v: 460.39 bus ID: 2d:00.0 
           chip ID: 10de:13c2 
           Display: x11 server: X.Org 1.20.9 driver: nvidia resolution: 1920x1080~60Hz 
           OpenGL: renderer: GeForce GTX 970/PCIe/SSE2 v: 4.6.0 NVIDIA 460.39 direct render: Yes 
Audio:     Device-1: NVIDIA GM204 High Definition Audio vendor: Gigabyte driver: snd_hda_intel v: kernel bus ID: 2d:00.1 
           chip ID: 10de:0fbb 
           Device-2: Advanced Micro Devices [AMD] Starship/Matisse HD Audio vendor: Micro-Star MSI driver: snd_hda_intel 
           v: kernel bus ID: 2f:00.4 chip ID: 1022:1487 
           Sound Server: ALSA v: k5.8.0-48-generic 
Network:   Device-1: Intel I211 Gigabit Network vendor: Micro-Star MSI driver: igb v: 5.6.0-k port: e000 bus ID: 26:00.0 
           chip ID: 8086:1539 
           IF: enp38s0 state: down mac: <filter> 
           Device-2: Realtek RTL8125 2.5GbE vendor: Micro-Star MSI driver: r8169 v: kernel port: d000 bus ID: 27:00.0 
           chip ID: 10ec:8125 
           IF: enp39s0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
           Device-3: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel port: d000 bus ID: 28:00.0 chip ID: 8086:2723 
           IF: wlo1 state: down mac: <filter> 
Drives:    Local Storage: total: 6.37 TiB used: 159.92 GiB (2.5%) 
           ID-1: /dev/nvme0n1 vendor: Corsair model: Force MP600 size: 931.51 GiB speed: 63.2 Gb/s lanes: 4 serial: <filter> 
           rev: EGFM11.3 scheme: GPT 
           ID-2: /dev/sda vendor: Western Digital model: WD4005FZBX-00K5WB0 size: 3.64 TiB speed: 6.0 Gb/s rotation: 7200 rpm 
           serial: <filter> rev: 1A01 temp: 33 C scheme: GPT 
           ID-3: /dev/sdb vendor: Crucial model: CT2000MX500SSD1 size: 1.82 TiB speed: 6.0 Gb/s serial: <filter> rev: 033 
           temp: 31 C scheme: GPT 
Partition: ID-1: / size: 122.34 GiB used: 9.95 GiB (8.1%) fs: ext4 dev: /dev/nvme0n1p5 
           ID-2: /home size: 519.69 GiB used: 6.35 GiB (1.2%) fs: ext4 dev: /dev/nvme0n1p7 
           ID-3: swap-1 size: 29.80 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/nvme0n1p6 
Sensors:   System Temperatures: cpu: 33.0 C mobo: N/A gpu: nvidia temp: 31 C 
           Fan Speeds (RPM): N/A gpu: nvidia fan: 47% 
Repos:     No active apt repos in: /etc/apt/sources.list 
           Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
           1: deb http://mirrors.evowise.com/linuxmint/packages ulyssa main upstream import backport
           2: deb http://mirrors.ircam.fr/pub/ubuntu/archive focal main restricted universe multiverse
           3: deb http://mirrors.ircam.fr/pub/ubuntu/archive focal-updates main restricted universe multiverse
           4: deb http://mirrors.ircam.fr/pub/ubuntu/archive focal-backports main restricted universe multiverse
           5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
           6: deb http://archive.canonical.com/ubuntu/ focal partner
           Active apt repos in: /etc/apt/sources.list.d/phoerious-keepassxc-focal.list 
           1: deb http://ppa.launchpad.net/phoerious/keepassxc/ubuntu focal main
           Active apt repos in: /etc/apt/sources.list.d/skype-stable.list 
           1: deb [arch=amd64] https://repo.skype.com/deb stable main
           Active apt repos in: /etc/apt/sources.list.d/yannubuntu-boot-repair-focal.list 
           1: deb http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu focal main
Info:      Processes: 416 Uptime: 6m Memory: 31.34 GiB used: 2.01 GiB (6.4%) Init: systemd v: 245 runlevel: 5 Compilers: 
           gcc: 9.3.0 alt: 9 Shell: bash v: 5.0.17 running in: gnome-terminal inxi: 3.0.38

[JoeFootball]

I have a filesystem issue.

I would try booting to a live session of Linux Mint (or anything that has GParted), open GParted, right-click on the offending partition(s), select "Check", and then the "Apply" button.

[youyou54]

interesting it seems i can reproduce the problem by doing a

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chmod -R 660 ./<directoryname>

on a directory on this partition .... If i try with

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chmod -R 770

or something else, it's working ...

maybe a bug? should i report this?

edit: the problem appears only if i set the user permissions to 6 with chmod
working:

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chmod -R 766

not working:

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chmod -R 666

[rene]

The "execute" bit on a directory governs ability to access/enter the directory; permission 6 (binary 110 i.e. rw-) denies said ability. That's to say, everything seems to be working as intended. What do you feel the issue to be?