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DescriptionJan Pazdziora (Red Hat)
2022-11-21 18:05:04 UTC
Description of problem:
On /usr/libexec/os-prober/newns, annocheck says that stack-prot test gets skipped because compiling in LTO mode hides the -fstack-protector-strong option. But on other binaries it seems to report both LTO and stack-prot just fine.
Version-Release number of selected component (if applicable):
annobin-annocheck-10.54-2.el9.x86_64
os-prober-1.77-9.el9.x86_64
bash-5.1.8-4.el9.x86_64
How reproducible:
Deterministic.
Steps to Reproduce:
1. dnf install -y annobin-annocheck os-prober bash
2. dnf debuginfo-install -y os-prober bash
3. annocheck --verbose --skip-all --test-stack-prot --test-lto /usr/bin/bash
4. Check that the output is
annocheck: Version 10.54.
Hardened: /usr/bin/bash: PASS: stack-prot test
Hardened: /usr/bin/bash: PASS: lto test because detected in DWARF information
Hardened: /usr/bin/bash: Overall: PASS.
5. annocheck --verbose --skip-all --test-stack-prot --test-lto /usr/libexec/os-prober/newns
Actual results:
annocheck: Version 10.54.
Hardened: /usr/libexec/os-prober/newns: PASS: lto test because detected in version note
Hardened: /usr/libexec/os-prober/newns: skip: stack-prot test because compiling in LTO mode hides the -fstack-protector-strong option
Hardened: /usr/libexec/os-prober/newns: Overall: PASS.
Expected results:
No skip of the stack-prot test, just like on bash.
Additional info:
Comment 1Jan Pazdziora (Red Hat)
2022-11-22 18:41:52 UTC
Checking with
readelf -Ws /usr/libexec/os-prober/newns | grep '__stack_chk_fail'
does not find anything, meaning the function to be called when the stack protection detects a corrupted stack is not referenced. So it seems to suggest -fstack-protector-strong was not used.
Comment 2Jan Pazdziora (Red Hat)
2022-11-22 18:55:49 UTC
Let me move this bugzilla to the os-prober component since the suspicion of missing compiler flags is real.
(In reply to Jan Pazdziora from comment #1)
[Clearing the needinfo from me ...]
> Checking with
>
> readelf -Ws /usr/libexec/os-prober/newns | grep '__stack_chk_fail'
>
> does not find anything, meaning the function to be called when the stack
> protection detects a corrupted stack is not referenced. So it seems to
> suggest -fstack-protector-strong was not used.
Agreed. This is likely another case where the code was compiled without security options enabled, or annobin annotation enabled.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (os-prober bug fix and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2023:2587