Bug 2330722
| Summary: | SELinux is preventing /usr/lib/systemd/system-generators/systemd-cryptsetup-generator from 'getattr' accesses on the nsfs_t file. | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Steve <y9t7sypezp> | ||||||||||
| Component: | selinux-policy | Assignee: | Zdenek Pytela <zpytela> | ||||||||||
| Status: | CLOSED DUPLICATE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||||||||
| Severity: | unspecified | Docs Contact: | |||||||||||
| Priority: | unspecified | ||||||||||||
| Version: | rawhide | CC: | dwalsh, lvrabec, mmalik, omosnacek, pkoncity, ppisar, vmojzis, y9t7sypezp, zpytela | ||||||||||
| Target Milestone: | --- | ||||||||||||
| Target Release: | --- | ||||||||||||
| Hardware: | x86_64 | ||||||||||||
| OS: | Unspecified | ||||||||||||
| Whiteboard: | abrt_hash:739f5ce3b2f5d8680ed1a72f1296895fc52af270e67544ef145b1d6c833953a3;VARIANT_ID=workstation; | ||||||||||||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |||||||||||
| Doc Text: | Story Points: | --- | |||||||||||
| Clone Of: | Environment: | ||||||||||||
| Last Closed: | 2024-12-11 08:38:20 UTC | Type: | --- | ||||||||||
| Regression: | --- | Mount Type: | --- | ||||||||||
| Documentation: | --- | CRM: | |||||||||||
| Verified Versions: | Category: | --- | |||||||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||||||
| Embargoed: | |||||||||||||
| Attachments: |
|
||||||||||||
Created attachment 2061428 [details]
File: description
Created attachment 2061429 [details]
File: os_info
Created attachment 2061430 [details]
$ sudo ausearch -i -ts boot -m avc
$ audit2allow -i avcs-2024-12-05.txt #============= systemd_homed_t ============== allow systemd_homed_t nsfs_t:file getattr; #============= systemd_hostnamed_t ============== allow systemd_hostnamed_t nsfs_t:file getattr; #============= systemd_localed_t ============== allow systemd_localed_t nsfs_t:file getattr; #============= systemd_logind_t ============== allow systemd_logind_t nsfs_t:file getattr; #============= systemd_timedated_t ============== allow systemd_timedated_t nsfs_t:file getattr; Created attachment 2061462 [details]
$ sudo ausearch -i -m avc # collect all the AVCs
$ audit2allow -i avcs-2024-12-06.txt | fgrep allow allow init_t locate_exec_t:file execute_no_trans; allow init_t locate_t:process2 nnp_transition; allow systemd_bless_boot_generator_t nsfs_t:file getattr; allow systemd_cryptsetup_generator_t nsfs_t:file getattr; allow systemd_debug_generator_t nsfs_t:file getattr; allow systemd_fstab_generator_t nsfs_t:file getattr; allow systemd_generic_generator_t nsfs_t:file getattr; allow systemd_getty_generator_t nsfs_t:file getattr; allow systemd_gpt_generator_t nsfs_t:file getattr; allow systemd_homed_t nsfs_t:file getattr; allow systemd_hostnamed_t nsfs_t:file getattr; allow systemd_localed_t nsfs_t:file getattr; allow systemd_logind_t nsfs_t:file getattr; allow systemd_rc_local_generator_t nsfs_t:file getattr; allow systemd_resolved_t nsfs_t:file getattr; allow systemd_ssh_generator_t nsfs_t:file getattr; allow systemd_sysv_generator_t nsfs_t:file getattr; allow systemd_timedated_t nsfs_t:file getattr; allow systemd_tpm2_generator_t nsfs_t:file getattr; allow systemd_zram_generator_t nsfs_t:file getattr; I found that nsfs is some kind of pseudofilesystem used for managing name spaces (containers). Is it what nsfs_t stands for? "rpm --reinstall audit-4.0.2-1.fc41.x86_64.rpm" reproduces the problem. (In reply to Petr Pisar from comment #7) > I found that nsfs is some kind of pseudofilesystem used for managing name spaces (containers). Is it what nsfs_t stands for? > > "rpm --reinstall audit-4.0.2-1.fc41.x86_64.rpm" reproduces the problem. Thanks for suggesting the reproducer. I am not an selinux maintainer, so I had to do some research, starting with asking an AI chat bot*: -- Prompt: In selinux, what is the "nsfs_t" type used for? Response: In SELinux, the "nsfs_t" type is used for the namespace file system. The namespace file system is a virtual file system that provides a way to manage and isolate system resources, such as process IDs, network namespaces, and mount namespaces. The "nsfs_t" type is used to label the namespace file system, which is typically mounted at /proc/<pid>/ns or /proc/<pid>/ns/<namespace_type>. This type is used to define the security context for the namespace file system, controlling access to the namespace resources. In SELinux, the "nsfs_t" type is typically used to restrict access to the namespace resources, such as preventing a process from accessing or modifying the namespace resources of another process. -- And here are two related man pages: $ whatis namespaces ioctl_nsfs namespaces (7) - overview of Linux namespaces ioctl_nsfs (2) - ioctl() operations for Linux namespaces * In this case, Llama 3.1 70B, seemed to give the best response: https://duckduckgo.com/?q=DuckDuckGo+AI+Chat&ia=chat&duckai=1 *** This bug has been marked as a duplicate of bug 2329280 *** |
Description of problem: Numerous AVCs after a fresh install of F42 Workstation in a VM with Fedora-Everything-netinst-x86_64-Rawhide-20241205.n.1.iso. -- SELinux is preventing /usr/lib/systemd/system-generators/systemd-cryptsetup-generator from 'getattr' accesses on the file file. ***** Plugin catchall (100. confidence) suggests ************************** If you believe that systemd-cryptsetup-generator should be allowed getattr access on the file file by default. Then you should report this as a bug. You can generate a local policy module to allow this access. Do allow this access for now by executing: # ausearch -c 'systemd-cryptse' --raw | audit2allow -M my-systemdcryptse # semodule -X 300 -i my-systemdcryptse.pp Additional Information: Source Context system_u:system_r:systemd_cryptsetup_generator_t:s 0 Target Context system_u:object_r:nsfs_t:s0 Target Objects file [ file ] Source systemd-cryptse Source Path /usr/lib/systemd/system-generators/systemd- cryptsetup-generator Port <Unknown> Host (removed) Source RPM Packages systemd-udev-257~rc3-1.fc42.x86_64 Target RPM Packages SELinux Policy RPM selinux-policy-targeted-41.26-2.fc42.noarch Local Policy RPM selinux-policy-targeted-41.26-2.fc42.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name (removed) Platform Linux (removed) 6.13.0- 0.rc1.20241204gitfeffde684ac2.17.fc42.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Dec 4 20:26:04 UTC 2024 x86_64 Alert Count 2 First Seen 2024-12-06 05:08:16 GMT Last Seen 2024-12-06 05:08:16 GMT Local ID 2626ada8-5b9d-4fba-bd08-85321630b997 Raw Audit Messages type=AVC msg=audit(1733461696.759:606): avc: denied { getattr } for pid=6107 comm="systemd-cryptse" path="pid:[4026531836]" dev="nsfs" ino=4026531836 scontext=system_u:system_r:systemd_cryptsetup_generator_t:s0 tcontext=system_u:object_r:nsfs_t:s0 tclass=file permissive=0 type=SYSCALL msg=audit(1733461696.759:606): arch=x86_64 syscall=newfstatat success=no exit=EACCES a0=ffffff9c a1=7ffe6f007210 a2=7ffe6f007230 a3=0 items=0 ppid=6091 pid=6107 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=systemd-cryptse exe=/usr/lib/systemd/system-generators/systemd-cryptsetup-generator subj=system_u:system_r:systemd_cryptsetup_generator_t:s0 key=(null) Hash: systemd-cryptse,systemd_cryptsetup_generator_t,nsfs_t,file,getattr Version-Release number of selected component: selinux-policy-targeted-41.26-2.fc42.noarch Additional info: reporter: libreport-2.17.15 reason: SELinux is preventing /usr/lib/systemd/system-generators/systemd-cryptsetup-generator from 'getattr' accesses on the file file. package: selinux-policy-targeted-41.26-2.fc42.noarch component: selinux-policy hashmarkername: setroubleshoot type: libreport kernel: 6.13.0-0.rc1.20241204gitfeffde684ac2.17.fc42.x86_64 component: selinux-policy