Bug 1810205 - firefox isn't CET enabled
Summary: firefox isn't CET enabled
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: firefox
Version: 33
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Gecko Maintainer
QA Contact: Fedora Extras Quality Assurance
Depends On:
Blocks: 1802674
TreeView+ depends on / blocked
Reported: 2020-03-04 17:36 UTC by H.J. Lu
Modified: 2020-08-11 13:12 UTC (History)
13 users (show)

Fixed In Version:
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Type: Bug

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Description H.J. Lu 2020-03-04 17:36:57 UTC
[hjl@gnu-4 glibc]$ readelf -n /usr/lib64/firefox/libxul.so 2>&1 | grep IBT
[hjl@gnu-4 glibc]$ readelf -n /usr/lib64/firefox/firefox 2>&1 | grep IBT
      Properties: x86 feature: IBT, SHSTK
[hjl@gnu-4 glibc]$ 

When CET enabled firefox dlopened /usr/lib64/firefox/libxul.so, dlopen
failed on CET processor under CET kernel.  Even if libxul.so is CET enabled,
JavaScript engine within Firefox generates jitted code is not CET enabled,
which will crash on CET processor under CET kernel.  Before the whole Firefox
is CET enabled, /usr/lib64/firefox/firefox shouldn't be marked as CET enabled.

Comment 1 Ben Cotton 2020-08-11 13:12:46 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 33 development cycle.
Changing version to 33.

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