vdso: Unexpected rt vDSO area bounds

[rst0git]

Today's Fedora rawhide updates broke checkpoint/restore in podman/criu. The error is triggered by the kernel and it has been bisected to the following package updates:

• works: kernel-core-6.13.0-0.rc0.20241119git158f238aa69d.2.fc42.x86_64
• fails: kernel-core-6.13.0-0.rc0.20241125git9f16d5e6f220.8.fc42.x86_64

Reproducible: Always

Steps to Reproduce:

• podman run --name=test1 -d quay.io/libpod/busybox sleep 1000
• podman container checkpoint test1

Actual Results:

2024-11-26T16:11:08.428787Z: CRIU checkpointing failed -52.  Please check CRIU logfile /var/lib/containers/storage/overlay-containers/2a3d740ede2eed92a3f963902dcb12bdd4e476ee2f3f73ffc86dfee71a5f9fbe/userdata/dump.log
Error: `/usr/bin/crun checkpoint --image-path /var/lib/containers/storage/overlay-containers/2a3d740ede2eed92a3f963902dcb12bdd4e476ee2f3f73ffc86dfee71a5f9fbe/userdata/checkpoint --work-path /var/lib/containers/storage/overlay-containers/2a3d740ede2eed92a3f963902dcb12bdd4e476ee2f3f73ffc86dfee71a5f9fbe/userdata 2a3d740ede2eed92a3f963902dcb12bdd4e476ee2f3f73ffc86dfee71a5f9fbe` failed: exit status 1

Full criu log ends like this:

(00.019461) vdso: Parsing at 7f13e5a1e000 7f13e5a20000
(00.019479) vdso: PT_LOAD p_vaddr: 0
(00.019482) vdso: DT_HASH: 120
(00.019483) vdso: DT_STRTAB: 340
(00.019485) vdso: DT_SYMTAB: 1d8
(00.019486) vdso: DT_STRSZ: 9c
(00.019488) vdso: DT_SYMENT: 18
(00.019489) vdso: nbucket 3 nchain f bucket 7f13e5a1e128 chain 7f13e5a1e134
(00.019492) Error (criu/vdso.c:381): vdso: Unexpected rt vDSO area bounds
(00.019494) Error (criu/vdso.c:613): vdso: Failed to fill self vdso symtable
(00.019496) Error (criu/kerndat.c:1906): kerndat_vdso_fill_symtable failed when initializing kerndat.
(00.019588) Found mmap_min_addr 0x10000
(00.019668) files stat: fs/nr_open 1073741816

Expected Results: checkpointing works

Originally reported at https://bugzilla.redhat.com/show_bug.cgi?id=2328985

[mihalicyn]

Hi Radostin!

I'm ready to take a look into it on this week if any help is needed here.