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Dead symlinks in modules
Posted: 2019/11/26 15:39:39
by ruliezz
Hi all,
After updating CentOS with yum update I got the follow errors with AIDE check:
Code: Select all
Dead symlink detected at /usr/lib/modules/3.10.0-1062.4.3.el7.x86_64/build
Dead symlink detected at /usr/lib/modules/3.10.0-1062.4.3.el7.x86_64/source
OS: CentOS Linux release 7.7.1908 (Core)
Kernel: 3.10.0-1062.4.3.el7.x86_64
I have tried to install kernel-devel but unfortunately did those not resolve my problem as describe above.
It's possible to configure AIDE so that it ignore dead links with: warn_dead_symlinks=no in /etc/aide.conf but I like to fix it the right way.
Any thoughts?
Thanks,
Re: Dead symlinks in modules
Posted: 2019/11/28 08:37:45
by ruliezz
Bump..
Re: Dead symlinks in modules
Posted: 2019/11/28 09:22:26
by MartinR
Code: Select all
# cd /usr/lib/modules/3.10.0-1062.4.1.el7.x86_64
# ls -l
...
... build -> /usr/src/kernels/3.10.0-1062.4.1.el7.x86_64
...
... source -> build
...
# cd /usr/src/kernels/3.10.0-1062.4.1.el7.x86_64
# yum provides /usr/src/kernels/3.10.0-1062.4.1.el7.x86_64
...
kernel-devel-3.10.0-1062.4.1.el7.x86_64 : Development package for building kernel modules to match the kernel
...
So - the links should be valid. I suggest you check that they look like mine shown above, and then check that the
/usr/src tree is there. If the former you can just correct the links, if the latter then try a reinstall of kernel-devel. If reinstalling keep a sharp eye on output and logs, if it doesn't sort it out there must be a deeper problem.
Re: Dead symlinks in modules
Posted: 2019/11/28 09:40:56
by ruliezz
Thanks for your help, I see this:
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ls -al /usr/src/kernels/3.10.0-1062.4.3.el7.x86_64
total 4884
drwxr-xr-x. 22 root root 4096 Nov 26 16:21 .
drwxr-xr-x. 3 root root 40 Nov 26 16:21 ..
drwxr-xr-x. 32 root root 4096 Nov 26 16:21 arch
drwxr-xr-x. 3 root root 78 Nov 26 16:21 block
-rw-r--r--. 1 root root 153186 Nov 14 01:03 .config
drwxr-xr-x. 4 root root 76 Nov 26 16:21 crypto
drwxr-xr-x. 119 root root 4096 Nov 26 16:21 drivers
drwxr-xr-x. 2 root root 22 Nov 26 16:21 firmware
drwxr-xr-x. 75 root root 4096 Nov 26 16:21 fs
drwxr-xr-x. 28 root root 4096 Nov 26 16:21 include
drwxr-xr-x. 2 root root 37 Nov 26 16:21 init
drwxr-xr-x. 2 root root 22 Nov 26 16:21 ipc
-rw-r--r--. 1 root root 505 Nov 14 01:03 Kconfig
drwxr-xr-x. 13 root root 247 Nov 26 16:21 kernel
drwxr-xr-x. 10 root root 219 Nov 26 16:21 lib
-rw-r--r--. 1 root root 51297 Nov 14 01:03 Makefile
-rw-r--r--. 1 root root 2305 Nov 14 01:03 Makefile.qlock
drwxr-xr-x. 2 root root 58 Nov 26 16:21 mm
-rw-r--r--. 1 root root 1140869 Nov 14 01:03 Module.symvers
drwxr-xr-x. 61 root root 4096 Nov 26 16:21 net
drwxr-xr-x. 15 root root 231 Nov 26 16:21 samples
drwxr-xr-x. 13 root root 4096 Nov 26 16:21 scripts
drwxr-xr-x. 9 root root 136 Nov 26 16:21 security
drwxr-xr-x. 24 root root 4096 Nov 26 16:21 sound
-rw-r--r--. 1 root root 3598707 Nov 14 01:03 System.map
drwxr-xr-x. 20 root root 254 Nov 26 16:21 tools
drwxr-xr-x. 2 root root 37 Nov 26 16:21 usr
drwxr-xr-x. 4 root root 44 Nov 26 16:21 virt
-rw-r--r--. 1 root root 41 Nov 14 01:03 vmlinux.id
Do you mean I can repair the symlinks so that it point to this directory?
Re: Dead symlinks in modules
Posted: 2019/11/28 09:55:30
by MartinR
Just before you do, can you post what the actual links are?
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# cd /usr/lib/modules/3.10.0-1062.4.1.el7.x86_64
# ls -l build source
I can't see any reason not to repair them, obviously backup first though!
Re: Dead symlinks in modules
Posted: 2019/11/28 10:40:40
by ruliezz
We can close this topic, I just heard that my colleague has removed them because its not important.