Bug 2002756
| Summary: | glibc: ldd segfaults when inspecting vdso/vdso64.so | |||
|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Milos Malik <mmalik> | |
| Component: | glibc | Assignee: | Siddhesh Poyarekar <sipoyare> | |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | |
| Severity: | medium | Docs Contact: | ||
| Priority: | unspecified | |||
| Version: | 35 | CC: | aoliva, arjun.is, codonell, dj, fweimer, law, mcermak, mfabian, pfrankli, rth, sipoyare | |
| Target Milestone: | --- | |||
| Target Release: | --- | |||
| Hardware: | x86_64 | |||
| OS: | Linux | |||
| Whiteboard: | ||||
| Fixed In Version: | glibc-2.34-8.fc35 glibc-2.34.9000-15.fc36 | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | ||
| Clone Of: | ||||
| : | 2007412 2007417 (view as bug list) | Environment: | ||
| Last Closed: | 2021-11-06 01:26:49 UTC | Type: | Bug | |
| Regression: | --- | Mount Type: | --- | |
| Documentation: | --- | CRM: | ||
| Verified Versions: | Category: | --- | ||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | ||
| Cloudforms Team: | --- | Target Upstream Version: | ||
| Embargoed: | ||||
| Bug Depends On: | ||||
| Bug Blocks: | 2007412, 2007417 | |||
|
Description
Milos Malik
2021-09-09 16:01:00 UTC
# coredumpctl info -1
PID: 171717 (ld-linux-x86-64)
UID: 0 (root)
GID: 0 (root)
Signal: 11 (SEGV)
Timestamp: Thu 2021-09-09 17:59:21 CEST (4min 16s ago)
Command Line: /lib64/ld-linux-x86-64.so.2 --verify /usr/lib/modules/5.14.0-60.fc35.x86_64/vdso/vdso64.so
Executable: /usr/lib64/ld-linux-x86-64.so.2
Control Group: /user.slice/user-0.slice/session-7.scope
Unit: session-7.scope
Slice: user-0.slice
Session: 7
Owner UID: 0 (root)
Boot ID: 3bd370f0e89d40b8b86c900230c3df64
Machine ID: 55145aeb0fda4773a99e8005c8c401ad
Hostname: fedora
Storage: /var/lib/systemd/coredump/core.ld-linux-x86-64.0.3bd370f0e89d40b8b86c900230c3df64.171717.1631203161000000.zst (present)
Disk Size: 8.2K
Message: Process 171717 (ld-linux-x86-64) of user 0 dumped core.
Found module /usr/lib/modules/5.14.0-60.fc35.x86_64/vdso/vdso64.so with build-id: 3ae4236b7c6b56d451d140d6e46cd907482b3222
Found module /usr/lib64/ld-linux-x86-64.so.2 with build-id: 1c18121cc82ea66475d16f60c87e7642b99a64e4
Found module linux-vdso.so.1 with build-id: ed20e76e7305a015b02ca28805e804deda0c04d0
Stack trace of thread 171717:
#0 0x00007f4dd152fef5 elf_get_dynamic_info (/usr/lib64/ld-linux-x86-64.so.2 + 0x8ef5)
#1 0x00007f4dd1530d38 _dl_map_object (/usr/lib64/ld-linux-x86-64.so.2 + 0x9d38)
#2 0x00007f4dd15282a9 map_doit (/usr/lib64/ld-linux-x86-64.so.2 + 0x12a9)
#3 0x00007f4dd154545e _dl_catch_exception (/usr/lib64/ld-linux-x86-64.so.2 + 0x1e45e)
#4 0x00007f4dd1545503 _dl_catch_error (/usr/lib64/ld-linux-x86-64.so.2 + 0x1e503)
#5 0x00007f4dd152d01f dl_main (/usr/lib64/ld-linux-x86-64.so.2 + 0x601f)
#6 0x00007f4dd1544407 _dl_sysdep_start (/usr/lib64/ld-linux-x86-64.so.2 + 0x1d407)
#7 0x00007f4dd152909f _dl_start_final (/usr/lib64/ld-linux-x86-64.so.2 + 0x209f)
#8 0x00007f4dd1528098 _start (/usr/lib64/ld-linux-x86-64.so.2 + 0x1098)
#
The issue is reproducible on s390x and x86_64: * https://beaker.engineering.redhat.com/jobs/5792572 Even though SELinux denials appear, the beaker job intentionally switches SELinux to permissive. It looks like the vdso doesn't expect to be relocated because of which all of its segments are read-only, causing this crash when ld.so tries to adjust info in .dynamic. ld.so --verify should bail out if it finds that the dynamic section is read-only, perhaps with a "not relocatable" message or something similar. Note that the upstream patch is broken: https://sourceware.org/pipermail/libc-alpha/2021-September/131287.html I had to back it out in rawhide. FEDORA-2021-2890ebe259 has been submitted as an update to Fedora 35. https://bodhi.fedoraproject.org/updates/FEDORA-2021-2890ebe259 FEDORA-2021-2890ebe259 has been pushed to the Fedora 35 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2021-2890ebe259` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2021-2890ebe259 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2021-2890ebe259 has been pushed to the Fedora 35 stable repository. If problem still persists, please make note of it in this bug report. |