clamonacc warning, file path check failure

[Massimo-B]

Describe the bug

clamonacc fails on almost every file in clamd.log like this:
Thu Oct 5 07:04:12 2023 -> WARNING: File path check failure for: /home/mb/.cache/mesa_shader_cache/95/de91d163271622077df15cd694dd8dc05f5685
I can't see any symlinking in that path.

Filesystem is btrfs.

How to reproduce the problem

$ clamconf -n
Checking configuration files in /etc/clamav

Config file: clamd.conf
-----------------------
LogFile = "/var/log/clamav/clamd.log"
LogFileMaxSize = "10485760"
LogTime = "yes"
LogVerbose = "yes"
ExtendedDetectionInfo = "yes"
PidFile = "/var/run/clamd.pid"
LocalSocket = "/tmp/clamd.socket"
ExcludePath = "^/proc/", "^/sys/"
MaxDirectoryRecursion = "20"
User = "clamav"
DetectPUA = "yes"
AlertBrokenExecutables = "yes"
AlertEncrypted = "yes"
AlertEncryptedArchive = "yes"
AlertPhishingSSLMismatch = "yes"
AlertPhishingCloak = "yes"
AlertPartitionIntersection = "yes"
OnAccessIncludePath = "/home"
OnAccessMaxFileSize = "104857600"
OnAccessPrevention = "yes"

Config file: freshclam.conf
---------------------------
PidFile = "/var/run/freshclam.pid"
UpdateLogFile = "/var/log/clamav/freshclam.log"
DatabaseMirror = "database.clamav.net"

clamav-milter.conf not found

Software settings
-----------------
Version: 1.1.0
Optional features supported: MEMPOOL AUTOIT_EA06 BZIP2 LIBXML2 PCRE2 ICONV JSON RAR 

Database information
--------------------
Database directory: /var/lib/clamav
main.cvd: version 62, sigs: 6647427, built on Thu Sep 16 14:32:42 2021
bytecode.cvd: version 334, sigs: 91, built on Wed Feb 22 22:33:21 2023
daily.cld: version 27056, sigs: 2042596, built on Mon Oct  9 09:40:11 2023
Total number of signatures: 8690114

Platform information
--------------------
uname: Linux 6.1.41-gentoo #1 SMP PREEMPT_DYNAMIC Thu Jul 27 15:19:56 CEST 2023 x86_64
OS: Linux, ARCH: x86_64, CPU: x86_64
Full OS version: "Gentoo Linux"
zlib version: 1.2.13 (1.2.13), compile flags: a9
platform id: 0x0a21b4b408000000000c0301

Build information
-----------------
GNU C: 12.3.1 20230526 (12.3.1)
sizeof(void*) = 8
Engine flevel: 180, dconf: 180

[val-ms]

Issue likely related to #514 and #857

Some mounted filesystems seem to cause this error. But if not all files in this directory cause the issue then it's probably not that.

Another possibility since I noticed that this is in a cache directory is that the cache file may have been deleted before the scan starts and I imagine that would cause this error.

[squalou]

In case it helps,

I had the same issue, used --stream as a workaround.

Running clamonacc --fdpass also seems to fix the issue in my case.

[jshand2015]

I have this issue too and i'm using the ext4 filesystem. opensuse tumbleweed

clamconf -n

Checking configuration files in /etc

Config file: clamd.conf

LogSyslog = "yes"
LogFacility = "LOG_MAIL"
PidFile = "/run/clamav/clamd.pid"
LocalSocket = "/run/clamav/clamd.sock"
User = "vscan"
OnAccessIncludePath = "/home"
OnAccessExcludeUname = "vscan"

Config file: freshclam.conf

PidFile = "/run/clamav/freshclam.pid"
DatabaseMirror = "database.clamav.net"

clamav-milter.conf not found

Software settings

Version: 1.3.1
Optional features supported: MEMPOOL AUTOIT_EA06 BZIP2 LIBXML2 PCRE2 ICONV JSON RAR

Database information

Database directory: /var/lib/clamav
daily.cld: version 27327, sigs: 2063880, built on Fri Jul 5 20:36:37 2024
bytecode.cld: version 335, sigs: 86, built on Wed Feb 28 04:37:24 2024
main.cvd: version 62, sigs: 6647427, built on Fri Sep 17 00:32:42 2021
Total number of signatures: 8711393

Platform information

uname: Linux 6.9.7-1-default #1 SMP PREEMPT_DYNAMIC Fri Jun 28 05:50:47 UTC 2024 (a5efffa) x86_64
OS: Linux, ARCH: x86_64, CPU: x86_64
Full OS version: "openSUSE Tumbleweed"
zlib version: 1.3.1 (1.3.1), compile flags: a9
platform id: 0x0a21c9c908000000000d0300

Build information

GNU C: 13.3.0 (13.3.0)
sizeof(void*) = 8
Engine flevel: 201, dconf: 201